--- /dev/null 2016-03-02 13:43:58.000000000 +0100 +++ new/test/java/lang/invoke/FindAccessTest.java 2016-03-02 13:43:58.000000000 +0100 @@ -0,0 +1,111 @@ +/* + * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8139885 + * @run testng/othervm -ea -esa test.java.lang.invoke.FindAccessTest + */ + +package test.java.lang.invoke; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.invoke.MethodType; + +import static org.testng.AssertJUnit.*; + +import org.testng.annotations.*; + +/** + * Tests for Lookup.findClass/accessClass extensions added in JEP 274. + */ +public class FindAccessTest { + + static final Lookup LOOKUP = MethodHandles.lookup(); + + @Test + public static void testFindSpecial() throws Throwable { + FindSpecial.C c = new FindSpecial.C(); + assertEquals("I1.m", c.m()); + MethodType t = MethodType.methodType(String.class); + MethodHandle ci1m = LOOKUP.findSpecial(FindSpecial.I1.class, "m", t, FindSpecial.C.class); + assertEquals("I1.m", (String) ci1m.invoke(c)); + } + + @Test + public static void testFindSpecialAbstract() throws Throwable { + FindSpecial.C c = new FindSpecial.C(); + assertEquals("q", c.q()); + MethodType t = MethodType.methodType(String.class); + boolean caught = false; + try { + MethodHandle ci3q = LOOKUP.findSpecial(FindSpecial.I3.class, "q", t, FindSpecial.C.class); + } catch (Throwable thrown) { + if (!(thrown instanceof IllegalAccessException) || !FindSpecial.ABSTRACT_ERROR.equals(thrown.getMessage())) { + throw new AssertionError(thrown.getMessage(), thrown); + } + caught = true; + } + assertTrue(caught); + } + + @Test(expectedExceptions = {ClassNotFoundException.class}) + public static void testFindClassCNFE() throws ClassNotFoundException, IllegalAccessException { + LOOKUP.findClass("does.not.Exist"); + } + + static class FindSpecial { + + interface I1 { + default String m() { + return "I1.m"; + } + } + + interface I2 { + default String m() { + return "I2.m"; + } + } + + interface I3 { + String q(); + } + + static class C implements I1, I2, I3 { + public String m() { + return I1.super.m(); + } + public String q() { + return "q"; + } + } + + static final String ABSTRACT_ERROR = "no such method: test.java.lang.invoke.FindAccessTest$FindSpecial$I3.q()String/invokeSpecial"; + + } + +} --- /dev/null 2016-03-02 13:43:59.000000000 +0100 +++ new/test/java/lang/invoke/FoldTest.java 2016-03-02 13:43:59.000000000 +0100 @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8139885 + * @run testng/othervm -ea -esa test.java.lang.invoke.FoldTest + */ + +package test.java.lang.invoke; + +import java.io.StringWriter; +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.invoke.MethodType; + +import static java.lang.invoke.MethodType.methodType; + +import static org.testng.AssertJUnit.*; + +import org.testng.annotations.*; + +/** + * Tests for the new fold method handle combinator added in JEP 274. + */ +public class FoldTest { + + static final Lookup LOOKUP = MethodHandles.lookup(); + + @Test + public static void testFold0a() throws Throwable { + // equivalence to foldArguments(MethodHandle,MethodHandle) + MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 0, Fold.MH_adder); + assertEquals(Fold.MT_folded1, fold.type()); + assertEquals(720, (int) fold.invoke(3, 4, 5)); + } + + @Test + public static void testFold1a() throws Throwable { + // test foldArguments for folding position 1 + MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 1, Fold.MH_adder1); + assertEquals(Fold.MT_folded1, fold.type()); + assertEquals(540, (int) fold.invoke(3, 4, 5)); + } + + @Test + public static void testFold0b() throws Throwable { + // test foldArguments equivalence with multiple types + MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 0, Fold.MH_comb); + assertEquals(Fold.MT_folded2, fold.type()); + assertEquals(23, (int) fold.invoke("true", true, 23)); + } + + @Test + public static void testFold1b() throws Throwable { + // test folgArguments for folding position 1, with multiple types + MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 1, Fold.MH_comb2); + assertEquals(Fold.MT_folded3, fold.type()); + assertEquals(1, (int) fold.invoke(true, true, 1)); + assertEquals(-1, (int) fold.invoke(true, false, -1)); + } + + @Test + public static void testFoldArgumentsExample() throws Throwable { + // test the JavaDoc foldArguments-with-pos example + StringWriter swr = new StringWriter(); + MethodHandle trace = LOOKUP.findVirtual(StringWriter.class, "write", methodType(void.class, String.class)).bindTo(swr); + MethodHandle cat = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class)); + assertEquals("boojum", (String) cat.invokeExact("boo", "jum")); + MethodHandle catTrace = MethodHandles.foldArguments(cat, 1, trace); + assertEquals("boojum", (String) catTrace.invokeExact("boo", "jum")); + assertEquals("jum", swr.toString()); + } + + static class Fold { + + static int adder(int a, int b, int c) { + return a + b + c; + } + + static int adder1(int a, int b) { + return a + b; + } + + static int multer(int x, int q, int r, int s) { + return x * q * r * s; + } + + static int str(boolean b1, String s, boolean b2, int x) { + return b1 && s.equals(String.valueOf(b2)) ? x : -x; + } + + static boolean comb(String s, boolean b2) { + return !s.equals(b2); + } + + static String comb2(boolean b2, int x) { + int ib = b2 ? 1 : 0; + return ib == x ? "true" : "false"; + } + + static final Class FOLD = Fold.class; + + static final MethodType MT_adder = methodType(int.class, int.class, int.class, int.class); + static final MethodType MT_adder1 = methodType(int.class, int.class, int.class); + static final MethodType MT_multer = methodType(int.class, int.class, int.class, int.class, int.class); + static final MethodType MT_str = methodType(int.class, boolean.class, String.class, boolean.class, int.class); + static final MethodType MT_comb = methodType(boolean.class, String.class, boolean.class); + static final MethodType MT_comb2 = methodType(String.class, boolean.class, int.class); + + static final MethodHandle MH_adder; + static final MethodHandle MH_adder1; + static final MethodHandle MH_multer; + static final MethodHandle MH_str; + static final MethodHandle MH_comb; + static final MethodHandle MH_comb2; + + static final MethodType MT_folded1 = methodType(int.class, int.class, int.class, int.class); + static final MethodType MT_folded2 = methodType(int.class, String.class, boolean.class, int.class); + static final MethodType MT_folded3 = methodType(int.class, boolean.class, boolean.class, int.class); + + static { + try { + MH_adder = LOOKUP.findStatic(FOLD, "adder", MT_adder); + MH_adder1 = LOOKUP.findStatic(FOLD, "adder1", MT_adder1); + MH_multer = LOOKUP.findStatic(FOLD, "multer", MT_multer); + MH_str = LOOKUP.findStatic(FOLD, "str", MT_str); + MH_comb = LOOKUP.findStatic(FOLD, "comb", MT_comb); + MH_comb2 = LOOKUP.findStatic(FOLD, "comb2", MT_comb2); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + } + +} --- /dev/null 2016-03-02 13:44:00.000000000 +0100 +++ new/test/java/lang/invoke/LoopTest.java 2016-03-02 13:44:00.000000000 +0100 @@ -0,0 +1,766 @@ +/* + * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8139885 + * @bug 8150635 + * @run testng/othervm -ea -esa test.java.lang.invoke.LoopTest + */ + +package test.java.lang.invoke; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.invoke.MethodType; +import java.util.*; + +import static java.lang.invoke.MethodType.methodType; + +import static org.testng.AssertJUnit.*; + +import org.testng.annotations.*; + +/** + * Tests for the loop combinators introduced in JEP 274. + */ +public class LoopTest { + + static final Lookup LOOKUP = MethodHandles.lookup(); + + @Test + public static void testLoopFac() throws Throwable { + MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc}; + MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; + MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); + assertEquals(Fac.MT_fac, loop.type()); + assertEquals(120, loop.invoke(5)); + } + + @Test + public static void testLoopFacNullInit() throws Throwable { + // null initializer for counter, should initialize to 0 + MethodHandle[] counterClause = new MethodHandle[]{null, Fac.MH_inc}; + MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; + MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); + assertEquals(Fac.MT_fac, loop.type()); + assertEquals(120, loop.invoke(5)); + } + + @Test + public static void testLoopNullInit() throws Throwable { + // null initializer for counter, should initialize to 0, one-clause loop + MethodHandle[] counterClause = new MethodHandle[]{null, Loop.MH_inc, Loop.MH_pred, Loop.MH_fin}; + MethodHandle loop = MethodHandles.loop(counterClause); + assertEquals(Loop.MT_loop, loop.type()); + assertEquals(10, loop.invoke(10)); + } + + @Test + public static void testLoopVoid1() throws Throwable { + // construct a post-checked loop that only does one iteration and has a void body and void local state + MethodHandle loop = MethodHandles.loop(new MethodHandle[]{Empty.MH_f, Empty.MH_f, Empty.MH_pred, null}); + assertEquals(MethodType.methodType(void.class), loop.type()); + loop.invoke(); + } + + @Test + public static void testLoopVoid2() throws Throwable { + // construct a post-checked loop that only does one iteration and has a void body and void local state, + // initialized implicitly from the step type + MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, null}); + assertEquals(MethodType.methodType(void.class), loop.type()); + loop.invoke(); + } + + @Test + public static void testLoopVoid3() throws Throwable { + // construct a post-checked loop that only does one iteration and has a void body and void local state, + // and that has a void finalizer + MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_f}); + assertEquals(MethodType.methodType(void.class), loop.type()); + loop.invoke(); + } + + @Test + public static void testLoopFacWithVoidState() throws Throwable { + // like testLoopFac, but with additional void state that outputs a dot + MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc}; + MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; + MethodHandle[] dotClause = new MethodHandle[]{null, Fac.MH_dot}; + MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause, dotClause); + assertEquals(Fac.MT_fac, loop.type()); + assertEquals(120, loop.invoke(5)); + } + + @Test + public static void testLoopVoidInt() throws Throwable { + // construct a post-checked loop that only does one iteration and has a void body and void local state, + // and that returns a constant + MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_c}); + assertEquals(MethodType.methodType(int.class), loop.type()); + assertEquals(23, loop.invoke()); + } + + @Test + public static void testLoopWithVirtuals() throws Throwable { + // construct a loop (to calculate factorial) that uses a mix of static and virtual methods + MethodHandle[] counterClause = new MethodHandle[]{null, LoopWithVirtuals.permute(LoopWithVirtuals.MH_inc)}; + MethodHandle[] accumulatorClause = new MethodHandle[]{ + // init function must indicate the loop arguments (there is no other means to determine them) + MethodHandles.dropArguments(LoopWithVirtuals.MH_one, 0, LoopWithVirtuals.class), + LoopWithVirtuals.permute(LoopWithVirtuals.MH_mult), + LoopWithVirtuals.permute(LoopWithVirtuals.MH_pred), + LoopWithVirtuals.permute(LoopWithVirtuals.MH_fin) + }; + MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); + assertEquals(LoopWithVirtuals.MT_loop, loop.type()); + assertEquals(120, loop.invoke(new LoopWithVirtuals(), 5)); + } + + @DataProvider + static Object[][] negativeTestData() { + MethodHandle i0 = MethodHandles.constant(int.class, 0); + MethodHandle ii = MethodHandles.dropArguments(i0, 0, int.class, int.class); + MethodHandle id = MethodHandles.dropArguments(i0, 0, int.class, double.class); + MethodHandle i3 = MethodHandles.dropArguments(i0, 0, int.class, int.class, int.class); + List inits = Arrays.asList(ii, id, i3); + List> ints = Arrays.asList(int.class, int.class, int.class); + List finis = Arrays.asList(Fac.MH_fin, Fac.MH_inc, Counted.MH_step); + List preds1 = Arrays.asList(null, null, null); + List preds2 = Arrays.asList(null, Fac.MH_fin, null); + MethodHandle eek = MethodHandles.dropArguments(i0, 0, int.class, int.class, double.class); + List nesteps = Arrays.asList(Fac.MH_inc, eek, Fac.MH_dot); + List nepreds = Arrays.asList(null, Fac.MH_pred, null); + List nefinis = Arrays.asList(null, Fac.MH_fin, null); + List lvsteps = Arrays.asList(LoopWithVirtuals.MH_inc, LoopWithVirtuals.MH_mult); + List lvpreds = Arrays.asList(null, LoopWithVirtuals.MH_pred); + List lvfinis = Arrays.asList(null, LoopWithVirtuals.MH_fin); + return new Object[][] { + {null, "null or no clauses passed"}, + {new MethodHandle[][]{}, "null or no clauses passed"}, + {new MethodHandle[][]{{null, Fac.MH_inc}, {Fac.MH_one, null, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}}, + "All loop clauses must be represented as MethodHandle arrays with at most 4 elements."}, + {new MethodHandle[][]{{null, Fac.MH_inc}, null}, "null clauses are not allowed"}, + {new MethodHandle[][]{{Fac.MH_zero, Fac.MH_dot}}, + "clause 0: init and step return types must match: int != void"}, + {new MethodHandle[][]{{ii}, {id}, {i3}}, + "found non-effectively identical init parameter type lists: " + inits + + " (common suffix: " + ints + ")"}, + {new MethodHandle[][]{{null, Fac.MH_inc, null, Fac.MH_fin}, {null, Fac.MH_inc, null, Fac.MH_inc}, + {null, Counted.MH_start, null, Counted.MH_step}}, + "found non-identical finalizer return types: " + finis + " (return type: int)"}, + {new MethodHandle[][]{{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, null, Fac.MH_fin}, + {null, Fac.MH_dot}}, "no predicate found: " + preds1}, + {new MethodHandle[][]{{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, Fac.MH_fin, Fac.MH_fin}, + {null, Fac.MH_dot}}, "predicates must have boolean return type: " + preds2}, + {new MethodHandle[][]{{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, eek, Fac.MH_pred, Fac.MH_fin}, + {null, Fac.MH_dot}}, + "found non-effectively identical parameter type lists:\nstep: " + nesteps + + "\npred: " + nepreds + "\nfini: " + nefinis + " (common parameter sequence: " + ints + ")"}, + {new MethodHandle[][]{{null, LoopWithVirtuals.MH_inc}, + {LoopWithVirtuals.MH_one, LoopWithVirtuals.MH_mult, LoopWithVirtuals.MH_pred, LoopWithVirtuals.MH_fin}}, + "found non-effectively identical parameter type lists:\nstep: " + lvsteps + + "\npred: " + lvpreds + "\nfini: " + lvfinis + " (common parameter sequence: " + ints + ")"} + }; + } + + static final MethodHandle MH_loop; + + static { + try { + MH_loop = LOOKUP.findStatic(MethodHandles.class, "loop", methodType(MethodHandle.class, MethodHandle[][].class)); + } catch (NoSuchMethodException | IllegalAccessException e) { + throw new ExceptionInInitializerError(e); + } + } + + @Test(dataProvider = "negativeTestData") + public static void testLoopNegative(MethodHandle[][] clauses, String expectedMessage) throws Throwable { + boolean caught = false; + try { + MH_loop.invokeWithArguments(clauses); + } catch (IllegalArgumentException iae) { + assertEquals(expectedMessage, iae.getMessage()); + caught = true; + } + assertTrue(caught); + } + + @Test + public static void testWhileLoop() throws Throwable { + // int i = 0; while (i < limit) { ++i; } return i; => limit + MethodHandle loop = MethodHandles.whileLoop(While.MH_zero, While.MH_pred, While.MH_step); + assertEquals(While.MT_while, loop.type()); + assertEquals(23, loop.invoke(23)); + } + + @Test + public static void testWhileLoopNoIteration() throws Throwable { + // a while loop that never executes its body because the predicate evaluates to false immediately + MethodHandle loop = MethodHandles.whileLoop(While.MH_initString, While.MH_predString, While.MH_stepString); + assertEquals(While.MT_string, loop.type()); + assertEquals("a", loop.invoke()); + } + + @Test + public static void testDoWhileLoop() throws Throwable { + // int i = 0; do { ++i; } while (i < limit); return i; => limit + MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zero, While.MH_step, While.MH_pred); + assertEquals(While.MT_while, loop.type()); + assertEquals(23, loop.invoke(23)); + } + + @Test + public static void testWhileZip() throws Throwable { + MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zipInitZip, While.MH_zipStep, While.MH_zipPred); + assertEquals(While.MT_zip, loop.type()); + List a = Arrays.asList("a", "b", "c", "d"); + List b = Arrays.asList("e", "f", "g", "h"); + List zipped = Arrays.asList("a", "e", "b", "f", "c", "g", "d", "h"); + assertEquals(zipped, (List) loop.invoke(a.iterator(), b.iterator())); + } + + @Test + public static void testCountedLoop() throws Throwable { + // String s = "Lambdaman!"; for (int i = 0; i < 13; ++i) { s = "na " + s; } return s; => a variation on a well known theme + MethodHandle fit13 = MethodHandles.constant(int.class, 13); + MethodHandle loop = MethodHandles.countedLoop(fit13, Counted.MH_start, Counted.MH_step); + assertEquals(Counted.MT_counted, loop.type()); + assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!")); + } + + @Test + public static void testCountedArrayLoop() throws Throwable { + // int[] a = new int[]{0}; for (int i = 0; i < 13; ++i) { ++a[0]; } => a[0] == 13 + MethodHandle fit13 = MethodHandles.dropArguments(MethodHandles.constant(int.class, 13), 0, int[].class); + MethodHandle loop = MethodHandles.countedLoop(fit13, null, Counted.MH_stepUpdateArray); + assertEquals(Counted.MT_arrayCounted, loop.type()); + int[] a = new int[]{0}; + loop.invoke(a); + assertEquals(13, a[0]); + } + + @Test + public static void testCountedPrintingLoop() throws Throwable { + MethodHandle fit5 = MethodHandles.constant(int.class, 5); + MethodHandle loop = MethodHandles.countedLoop(fit5, null, Counted.MH_printHello); + assertEquals(Counted.MT_countedPrinting, loop.type()); + loop.invoke(); + } + + @Test + public static void testCountedRangeLoop() throws Throwable { + // String s = "Lambdaman!"; for (int i = -5; i < 8; ++i) { s = "na " + s; } return s; => a well known theme + MethodHandle fitm5 = MethodHandles.dropArguments(Counted.MH_m5, 0, String.class); + MethodHandle fit8 = MethodHandles.dropArguments(Counted.MH_8, 0, String.class); + MethodHandle loop = MethodHandles.countedLoop(fitm5, fit8, Counted.MH_start, Counted.MH_step); + assertEquals(Counted.MT_counted, loop.type()); + assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!")); + } + + @Test + public static void testIterateSum() throws Throwable { + // Integer[] a = new Integer[]{1,2,3,4,5,6}; int sum = 0; for (int e : a) { sum += e; } return sum; => 21 + MethodHandle loop = MethodHandles.iteratedLoop(Iterate.MH_sumIterator, Iterate.MH_sumInit, Iterate.MH_sumStep); + assertEquals(Iterate.MT_sum, loop.type()); + assertEquals(21, loop.invoke(new Integer[]{1, 2, 3, 4, 5, 6})); + } + + @Test + public static void testIterateReverse() throws Throwable { + MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_reverseInit, Iterate.MH_reverseStep); + assertEquals(Iterate.MT_reverse, loop.type()); + List list = Arrays.asList("a", "b", "c", "d", "e"); + List reversedList = Arrays.asList("e", "d", "c", "b", "a"); + assertEquals(reversedList, (List) loop.invoke(list)); + } + + @Test + public static void testIterateLength() throws Throwable { + MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_lengthInit, Iterate.MH_lengthStep); + assertEquals(Iterate.MT_length, loop.type()); + List list = Arrays.asList(23.0, 148.0, 42.0); + assertEquals(list.size(), (int) loop.invoke(list)); + } + + @Test + public static void testIterateMap() throws Throwable { + MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_mapInit, Iterate.MH_mapStep); + assertEquals(Iterate.MT_map, loop.type()); + List list = Arrays.asList("Hello", "world", "!"); + List upList = Arrays.asList("HELLO", "WORLD", "!"); + assertEquals(upList, (List) loop.invoke(list)); + } + + @Test + public static void testIteratePrint() throws Throwable { + MethodHandle loop = MethodHandles.iteratedLoop(null, null, Iterate.MH_printStep); + assertEquals(Iterate.MT_print, loop.type()); + loop.invoke(Arrays.asList("hello", "world")); + } + + @Test + public static void testIterateNullBody() { + boolean caught = false; + try { + MethodHandles.iteratedLoop(MethodHandles.identity(int.class), MethodHandles.identity(int.class), null); + } catch (IllegalArgumentException iae) { + assertEquals("iterated loop body must not be null", iae.getMessage()); + caught = true; + } + assertTrue(caught); + } + + static class Empty { + + static void f() { } + + static boolean pred() { + return false; + } + + static int c() { + return 23; + } + + static final Class EMPTY = Empty.class; + + static final MethodType MT_f = methodType(void.class); + static final MethodType MT_pred = methodType(boolean.class); + static final MethodType MT_c = methodType(int.class); + + static final MethodHandle MH_f; + static final MethodHandle MH_pred; + static final MethodHandle MH_c; + + static { + try { + MH_f = LOOKUP.findStatic(EMPTY, "f", MT_f); + MH_pred = LOOKUP.findStatic(EMPTY, "pred", MT_pred); + MH_c = LOOKUP.findStatic(EMPTY, "c", MT_c); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + } + + static class Fac { + + static int zero(int k) { + return 0; + } + + static int one(int k) { + return 1; + } + + static boolean pred(int i, int acc, int k) { + return i < k; + } + + static int inc(int i, int acc, int k) { + return i + 1; + } + + static int mult(int i, int acc, int k) { + return i * acc; + } + + static void dot(int i, int acc, int k) { + System.out.print('.'); + } + + static int fin(int i, int acc, int k) { + return acc; + } + + static final Class FAC = Fac.class; + + static final MethodType MT_init = methodType(int.class, int.class); + static final MethodType MT_fn = methodType(int.class, int.class, int.class, int.class); + static final MethodType MT_dot = methodType(void.class, int.class, int.class, int.class); + static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class); + + static final MethodHandle MH_zero; + static final MethodHandle MH_one; + static final MethodHandle MH_pred; + static final MethodHandle MH_inc; + static final MethodHandle MH_mult; + static final MethodHandle MH_dot; + static final MethodHandle MH_fin; + + static final MethodType MT_fac = methodType(int.class, int.class); + + static { + try { + MH_zero = LOOKUP.findStatic(FAC, "zero", MT_init); + MH_one = LOOKUP.findStatic(FAC, "one", MT_init); + MH_pred = LOOKUP.findStatic(FAC, "pred", MT_pred); + MH_inc = LOOKUP.findStatic(FAC, "inc", MT_fn); + MH_mult = LOOKUP.findStatic(FAC, "mult", MT_fn); + MH_dot = LOOKUP.findStatic(FAC, "dot", MT_dot); + MH_fin = LOOKUP.findStatic(FAC, "fin", MT_fn); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + + static class Loop { + + static int inc(int i, int k) { + return i + 1; + } + + static boolean pred(int i, int k) { + return i < k; + } + + static int fin(int i, int k) { + return k; + } + + static final Class LOOP = Loop.class; + + static final MethodType MT_inc = methodType(int.class, int.class, int.class); + static final MethodType MT_pred = methodType(boolean.class, int.class, int.class); + static final MethodType MT_fin = methodType(int.class, int.class, int.class); + + static final MethodHandle MH_inc; + static final MethodHandle MH_pred; + static final MethodHandle MH_fin; + + static final MethodType MT_loop = methodType(int.class, int.class); + + static { + try { + MH_inc = LOOKUP.findStatic(LOOP, "inc", MT_inc); + MH_pred = LOOKUP.findStatic(LOOP, "pred", MT_pred); + MH_fin = LOOKUP.findStatic(LOOP, "fin", MT_fin); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + + static class LoopWithVirtuals { + + static int one(int k) { + return 1; + } + + int inc(int i, int acc, int k) { + return i + 1; + } + + int mult(int i, int acc, int k) { + return i * acc; + } + + boolean pred(int i, int acc, int k) { + return i < k; + } + + int fin(int i, int acc, int k) { + return acc; + } + + static final Class LOOP_WITH_VIRTUALS = LoopWithVirtuals.class; + + static final MethodType MT_one = methodType(int.class, int.class); + static final MethodType MT_inc = methodType(int.class, int.class, int.class, int.class); + static final MethodType MT_mult = methodType(int.class, int.class, int.class, int.class); + static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class); + static final MethodType MT_fin = methodType(int.class, int.class, int.class, int.class); + + static final MethodHandle MH_one; + static final MethodHandle MH_inc; + static final MethodHandle MH_mult; + static final MethodHandle MH_pred; + static final MethodHandle MH_fin; + + static final MethodType MT_loop = methodType(int.class, LOOP_WITH_VIRTUALS, int.class); + + static { + try { + MH_one = LOOKUP.findStatic(LOOP_WITH_VIRTUALS, "one", MT_one); + MH_inc = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "inc", MT_inc); + MH_mult = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "mult", MT_mult); + MH_pred = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "pred", MT_pred); + MH_fin = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "fin", MT_fin); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + static MethodHandle permute(MethodHandle h) { + // The handles representing virtual methods need to be rearranged to match the required order of arguments + // (loop-local state comes first, then loop arguments). As the receiver comes first in the signature but is + // a loop argument, it must be moved to the appropriate position in the signature. + return MethodHandles.permuteArguments(h, + methodType(h.type().returnType(), int.class, int.class, LOOP_WITH_VIRTUALS, int.class), 2, 0, 1, 3); + } + + } + + static class While { + + static int zero(int limit) { + return 0; + } + + static boolean pred(int i, int limit) { + return i < limit; + } + + static int step(int i, int limit) { + return i + 1; + } + + static String initString() { + return "a"; + } + + static boolean predString(String s) { + return s.length() != 1; + } + + static String stepString(String s) { + return s + "a"; + } + + static List zipInitZip(Iterator a, Iterator b) { + return new ArrayList<>(); + } + + static boolean zipPred(List zip, Iterator a, Iterator b) { + return a.hasNext() && b.hasNext(); + } + + static List zipStep(List zip, Iterator a, Iterator b) { + zip.add(a.next()); + zip.add(b.next()); + return zip; + } + + static final Class WHILE = While.class; + + static final MethodType MT_zero = methodType(int.class, int.class); + static final MethodType MT_pred = methodType(boolean.class, int.class, int.class); + static final MethodType MT_fn = methodType(int.class, int.class, int.class); + static final MethodType MT_initString = methodType(String.class); + static final MethodType MT_predString = methodType(boolean.class, String.class); + static final MethodType MT_stepString = methodType(String.class, String.class); + static final MethodType MT_zipInitZip = methodType(List.class, Iterator.class, Iterator.class); + static final MethodType MT_zipPred = methodType(boolean.class, List.class, Iterator.class, Iterator.class); + static final MethodType MT_zipStep = methodType(List.class, List.class, Iterator.class, Iterator.class); + + static final MethodHandle MH_zero; + static final MethodHandle MH_pred; + static final MethodHandle MH_step; + static final MethodHandle MH_initString; + static final MethodHandle MH_predString; + static final MethodHandle MH_stepString; + static final MethodHandle MH_zipInitZip; + static final MethodHandle MH_zipPred; + static final MethodHandle MH_zipStep; + + static final MethodType MT_while = methodType(int.class, int.class); + static final MethodType MT_string = methodType(String.class); + static final MethodType MT_zip = methodType(List.class, Iterator.class, Iterator.class); + + static { + try { + MH_zero = LOOKUP.findStatic(WHILE, "zero", MT_zero); + MH_pred = LOOKUP.findStatic(WHILE, "pred", MT_pred); + MH_step = LOOKUP.findStatic(WHILE, "step", MT_fn); + MH_initString = LOOKUP.findStatic(WHILE, "initString", MT_initString); + MH_predString = LOOKUP.findStatic(WHILE, "predString", MT_predString); + MH_stepString = LOOKUP.findStatic(WHILE, "stepString", MT_stepString); + MH_zipInitZip = LOOKUP.findStatic(WHILE, "zipInitZip", MT_zipInitZip); + MH_zipPred = LOOKUP.findStatic(WHILE, "zipPred", MT_zipPred); + MH_zipStep = LOOKUP.findStatic(WHILE, "zipStep", MT_zipStep); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + + static class Counted { + + static String start(String arg) { + return arg; + } + + static String step(int counter, String v, String arg) { + return "na " + v; + } + + static void stepUpdateArray(int counter, int[] a) { + ++a[0]; + } + + static void printHello(int counter) { + System.out.print("hello"); + } + + static final Class COUNTED = Counted.class; + + static final MethodType MT_start = methodType(String.class, String.class); + static final MethodType MT_step = methodType(String.class, int.class, String.class, String.class); + static final MethodType MT_stepUpdateArray = methodType(void.class, int.class, int[].class); + static final MethodType MT_printHello = methodType(void.class, int.class); + + static final MethodHandle MH_13; + static final MethodHandle MH_m5; + static final MethodHandle MH_8; + static final MethodHandle MH_start; + static final MethodHandle MH_step; + static final MethodHandle MH_stepUpdateArray; + static final MethodHandle MH_printHello; + + static final MethodType MT_counted = methodType(String.class, String.class); + static final MethodType MT_arrayCounted = methodType(void.class, int[].class); + static final MethodType MT_countedPrinting = methodType(void.class); + + static { + try { + MH_13 = MethodHandles.constant(int.class, 13); + MH_m5 = MethodHandles.constant(int.class, -5); + MH_8 = MethodHandles.constant(int.class, 8); + MH_start = LOOKUP.findStatic(COUNTED, "start", MT_start); + MH_step = LOOKUP.findStatic(COUNTED, "step", MT_step); + MH_stepUpdateArray = LOOKUP.findStatic(COUNTED, "stepUpdateArray", MT_stepUpdateArray); + MH_printHello = LOOKUP.findStatic(COUNTED, "printHello", MT_printHello); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + + static class Iterate { + + static Iterator sumIterator(Integer[] a) { + return Arrays.asList(a).iterator(); + } + + static int sumInit(Integer[] a) { + return 0; + } + + static int sumStep(int s, int e, Integer[] a) { + return s + e; + } + + static List reverseInit(List l) { + return new ArrayList<>(); + } + + static List reverseStep(String e, List r, List l) { + r.add(0, e); + return r; + } + + static int lengthInit(List l) { + return 0; + } + + static int lengthStep(Object o, int len, List l) { + return len + 1; + } + + static List mapInit(List l) { + return new ArrayList<>(); + } + + static List mapStep(String e, List r, List l) { + r.add(e.toUpperCase()); + return r; + } + + static void printStep(String s, List l) { + System.out.print(s); + } + + static final Class ITERATE = Iterate.class; + + static final MethodType MT_sumIterator = methodType(Iterator.class, Integer[].class); + + static final MethodType MT_sumInit = methodType(int.class, Integer[].class); + static final MethodType MT_reverseInit = methodType(List.class, List.class); + static final MethodType MT_lenghInit = methodType(int.class, List.class); + static final MethodType MT_mapInit = methodType(List.class, List.class); + + static final MethodType MT_sumStep = methodType(int.class, int.class, int.class, Integer[].class); + static final MethodType MT_reverseStep = methodType(List.class, String.class, List.class, List.class); + static final MethodType MT_lengthStep = methodType(int.class, Object.class, int.class, List.class); + static final MethodType MT_mapStep = methodType(List.class, String.class, List.class, List.class); + static final MethodType MT_printStep = methodType(void.class, String.class, List.class); + + static final MethodHandle MH_sumIterator; + static final MethodHandle MH_sumInit; + static final MethodHandle MH_sumStep; + static final MethodHandle MH_printStep; + + static final MethodHandle MH_reverseInit; + static final MethodHandle MH_reverseStep; + + static final MethodHandle MH_lengthInit; + static final MethodHandle MH_lengthStep; + + static final MethodHandle MH_mapInit; + static final MethodHandle MH_mapStep; + + static final MethodType MT_sum = methodType(int.class, Integer[].class); + static final MethodType MT_reverse = methodType(List.class, List.class); + static final MethodType MT_length = methodType(int.class, List.class); + static final MethodType MT_map = methodType(List.class, List.class); + static final MethodType MT_print = methodType(void.class, List.class); + + static { + try { + MH_sumIterator = LOOKUP.findStatic(ITERATE, "sumIterator", MT_sumIterator); + MH_sumInit = LOOKUP.findStatic(ITERATE, "sumInit", MT_sumInit); + MH_sumStep = LOOKUP.findStatic(ITERATE, "sumStep", MT_sumStep); + MH_reverseInit = LOOKUP.findStatic(ITERATE, "reverseInit", MT_reverseInit); + MH_reverseStep = LOOKUP.findStatic(ITERATE, "reverseStep", MT_reverseStep); + MH_lengthInit = LOOKUP.findStatic(ITERATE, "lengthInit", MT_lenghInit); + MH_lengthStep = LOOKUP.findStatic(ITERATE, "lengthStep", MT_lengthStep); + MH_mapInit = LOOKUP.findStatic(ITERATE, "mapInit", MT_mapInit); + MH_mapStep = LOOKUP.findStatic(ITERATE, "mapStep", MT_mapStep); + MH_printStep = LOOKUP.findStatic(ITERATE, "printStep", MT_printStep); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + +} --- /dev/null 2016-03-02 13:44:01.000000000 +0100 +++ new/test/java/lang/invoke/SpreadCollectTest.java 2016-03-02 13:44:01.000000000 +0100 @@ -0,0 +1,240 @@ +/* + * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8139885 + * @bug 8143798 + * @run testng/othervm -ea -esa test.java.lang.invoke.SpreadCollectTest + */ + +package test.java.lang.invoke; + +import java.io.StringWriter; +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.invoke.MethodType; +import java.lang.invoke.WrongMethodTypeException; +import java.util.*; + +import static java.lang.invoke.MethodType.methodType; + +import static org.testng.AssertJUnit.*; + +import org.testng.annotations.*; + +/** + * Tests for the new asSpreader/asCollector API added in JEP 274. + */ +public class SpreadCollectTest { + + static final Lookup LOOKUP = MethodHandles.lookup(); + + @Test + public static void testAsSpreader() throws Throwable { + MethodHandle spreader = SpreadCollect.MH_forSpreading.asSpreader(1, int[].class, 3); + assertEquals(SpreadCollect.MT_spreader, spreader.type()); + assertEquals("A456B", (String) spreader.invoke("A", new int[]{4, 5, 6}, "B")); + } + + @Test + public static void testAsSpreaderExample() throws Throwable { + // test the JavaDoc asSpreader-with-pos example + MethodHandle compare = LOOKUP.findStatic(Objects.class, "compare", methodType(int.class, Object.class, Object.class, Comparator.class)); + MethodHandle compare2FromArray = compare.asSpreader(0, Object[].class, 2); + Object[] ints = new Object[]{3, 9, 7, 7}; + Comparator cmp = (a, b) -> a - b; + assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 0, 2), cmp) < 0); + assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 1, 3), cmp) > 0); + assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 2, 4), cmp) == 0); + } + + @DataProvider + static Object[][] asSpreaderIllegalPositions() { + return new Object[][]{{-7}, {3}, {19}}; + } + + @Test(dataProvider = "asSpreaderIllegalPositions") + public static void testAsSpreaderIllegalPos(int p) throws Throwable { + boolean caught = false; + try { + SpreadCollect.MH_forSpreading.asSpreader(p, Object[].class, 3); + } catch (IllegalArgumentException iae) { + assertEquals("bad spread position", iae.getMessage()); + caught = true; + } + assertTrue(caught); + } + + @Test(expectedExceptions = {WrongMethodTypeException.class}) + public static void testAsSpreaderIllegalMethodType() { + MethodHandle h = MethodHandles.dropArguments(MethodHandles.constant(String.class, ""), 0, int.class, int.class); + MethodHandle s = h.asSpreader(String[].class, 1); + } + + @Test + public static void testAsCollector() throws Throwable { + MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1); + assertEquals(SpreadCollect.MT_collector1, collector.type()); + assertEquals("A4B", (String) collector.invoke("A", 4, "B")); + collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2); + assertEquals(SpreadCollect.MT_collector2, collector.type()); + assertEquals("A45B", (String) collector.invoke("A", 4, 5, "B")); + collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3); + assertEquals(SpreadCollect.MT_collector3, collector.type()); + assertEquals("A456B", (String) collector.invoke("A", 4, 5, 6, "B")); + } + + @Test + public static void testAsCollectorInvokeWithArguments() throws Throwable { + MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1); + assertEquals(SpreadCollect.MT_collector1, collector.type()); + assertEquals("A4B", (String) collector.invokeWithArguments("A", 4, "B")); + collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2); + assertEquals(SpreadCollect.MT_collector2, collector.type()); + assertEquals("A45B", (String) collector.invokeWithArguments("A", 4, 5, "B")); + collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3); + assertEquals(SpreadCollect.MT_collector3, collector.type()); + assertEquals("A456B", (String) collector.invokeWithArguments("A", 4, 5, 6, "B")); + } + + @Test + public static void testAsCollectorLeading() throws Throwable { + MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1); + assertEquals(SpreadCollect.MT_collectorLeading1, collector.type()); + assertEquals("7Q", (String) collector.invoke(7, "Q")); + collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2); + assertEquals(SpreadCollect.MT_collectorLeading2, collector.type()); + assertEquals("78Q", (String) collector.invoke(7, 8, "Q")); + collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3); + assertEquals(SpreadCollect.MT_collectorLeading3, collector.type()); + assertEquals("789Q", (String) collector.invoke(7, 8, 9, "Q")); + } + + @Test + public static void testAsCollectorLeadingInvokeWithArguments() throws Throwable { + MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1); + assertEquals(SpreadCollect.MT_collectorLeading1, collector.type()); + assertEquals("7Q", (String) collector.invokeWithArguments(7, "Q")); + collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2); + assertEquals(SpreadCollect.MT_collectorLeading2, collector.type()); + assertEquals("78Q", (String) collector.invokeWithArguments(7, 8, "Q")); + collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3); + assertEquals(SpreadCollect.MT_collectorLeading3, collector.type()); + assertEquals("789Q", (String) collector.invokeWithArguments(7, 8, 9, "Q")); + } + + @Test + public static void testAsCollectorNone() throws Throwable { + MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 0); + assertEquals(SpreadCollect.MT_collector0, collector.type()); + assertEquals("AB", (String) collector.invoke("A", "B")); + } + + @DataProvider + static Object[][] asCollectorIllegalPositions() { + return new Object[][]{{-1}, {17}}; + } + + @Test(dataProvider = "asCollectorIllegalPositions") + public static void testAsCollectorIllegalPos(int p) { + boolean caught = false; + try { + SpreadCollect.MH_forCollecting.asCollector(p, int[].class, 0); + } catch (IllegalArgumentException iae) { + assertEquals("bad collect position", iae.getMessage()); + caught = true; + } + assertTrue(caught); + } + + @Test + public static void testAsCollectorExample() throws Throwable { + // test the JavaDoc asCollector-with-pos example + StringWriter swr = new StringWriter(); + MethodHandle swWrite = LOOKUP. + findVirtual(StringWriter.class, "write", methodType(void.class, char[].class, int.class, int.class)). + bindTo(swr); + MethodHandle swWrite4 = swWrite.asCollector(0, char[].class, 4); + swWrite4.invoke('A', 'B', 'C', 'D', 1, 2); + assertEquals("BC", swr.toString()); + swWrite4.invoke('P', 'Q', 'R', 'S', 0, 4); + assertEquals("BCPQRS", swr.toString()); + swWrite4.invoke('W', 'X', 'Y', 'Z', 3, 1); + assertEquals("BCPQRSZ", swr.toString()); + } + + static class SpreadCollect { + + static String forSpreading(String s1, int i1, int i2, int i3, String s2) { + return s1 + i1 + i2 + i3 + s2; + } + + static String forCollecting(String s1, int[] is, String s2) { + StringBuilder sb = new StringBuilder(s1); + for (int i : is) { + sb.append(i); + } + return sb.append(s2).toString(); + } + + static String forCollectingLeading(int[] is, String s) { + return forCollecting("", is, s); + } + + static final Class SPREAD_COLLECT = SpreadCollect.class; + + static final MethodType MT_forSpreading = methodType(String.class, String.class, int.class, int.class, int.class, String.class); + static final MethodType MT_forCollecting = methodType(String.class, String.class, int[].class, String.class); + static final MethodType MT_forCollectingLeading = methodType(String.class, int[].class, String.class); + + static final MethodHandle MH_forSpreading; + static final MethodHandle MH_forCollecting; + static final MethodHandle MH_forCollectingLeading; + + static final MethodType MT_spreader = methodType(String.class, String.class, int[].class, String.class); + static final MethodType MT_collector0 = methodType(String.class, String.class, String.class); + static final MethodType MT_collector1 = methodType(String.class, String.class, int.class, String.class); + static final MethodType MT_collector2 = methodType(String.class, String.class, int.class, int.class, String.class); + static final MethodType MT_collector3 = methodType(String.class, String.class, int.class, int.class, int.class, String.class); + static final MethodType MT_collectorLeading1 = methodType(String.class, int.class, String.class); + static final MethodType MT_collectorLeading2 = methodType(String.class, int.class, int.class, String.class); + static final MethodType MT_collectorLeading3 = methodType(String.class, int.class, int.class, int.class, String.class); + + static final String NONE_ERROR = "zero array length in MethodHandle.asCollector"; + + static { + try { + MH_forSpreading = LOOKUP.findStatic(SPREAD_COLLECT, "forSpreading", MT_forSpreading); + MH_forCollecting = LOOKUP.findStatic(SPREAD_COLLECT, "forCollecting", MT_forCollecting); + MH_forCollectingLeading = LOOKUP.findStatic(SPREAD_COLLECT, "forCollectingLeading", MT_forCollectingLeading); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + +} --- /dev/null 2016-03-02 13:44:02.000000000 +0100 +++ new/test/java/lang/invoke/TryFinallyTest.java 2016-03-02 13:44:02.000000000 +0100 @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8139885 + * @bug 8150825 + * @run testng/othervm -ea -esa test.java.lang.invoke.TryFinallyTest + */ + +package test.java.lang.invoke; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.invoke.MethodType; + +import static java.lang.invoke.MethodType.methodType; + +import static org.testng.AssertJUnit.*; + +import org.testng.annotations.*; + +/** + * Tests for the tryFinally method handle combinator introduced in JEP 274. + */ +public class TryFinallyTest { + + static final Lookup LOOKUP = MethodHandles.lookup(); + + @Test + public static void testTryFinally() throws Throwable { + MethodHandle hello = MethodHandles.tryFinally(TryFinally.MH_greet, TryFinally.MH_exclaim); + assertEquals(TryFinally.MT_hello, hello.type()); + assertEquals("Hello, world!", hello.invoke("world")); + } + + @Test + public static void testTryFinallyVoid() throws Throwable { + MethodHandle tfVoid = MethodHandles.tryFinally(TryFinally.MH_print, TryFinally.MH_printMore); + assertEquals(TryFinally.MT_printHello, tfVoid.type()); + tfVoid.invoke("world"); + } + + @Test + public static void testTryFinallySublist() throws Throwable { + MethodHandle helloMore = MethodHandles.tryFinally(TryFinally.MH_greetMore, TryFinally.MH_exclaimMore); + assertEquals(TryFinally.MT_moreHello, helloMore.type()); + assertEquals("Hello, world and universe (but world first)!", helloMore.invoke("world", "universe")); + } + + @DataProvider + static Object[][] negativeTestData() { + MethodHandle intid = MethodHandles.identity(int.class); + MethodHandle intco = MethodHandles.constant(int.class, 0); + MethodHandle errTarget = MethodHandles.dropArguments(intco, 0, int.class, double.class, String.class, int.class); + MethodHandle errCleanup = MethodHandles.dropArguments(MethodHandles.constant(int.class, 0), 0, Throwable.class, + int.class, double.class, Object.class); + return new Object[][]{ + {intid, MethodHandles.identity(double.class), + "target and return types must match: double != int"}, + {intid, MethodHandles.dropArguments(intid, 0, String.class), + "cleanup first argument and Throwable must match: (String,int)int != class java.lang.Throwable"}, + {intid, MethodHandles.dropArguments(intid, 0, Throwable.class, double.class), + "cleanup second argument and target return type must match: (Throwable,double,int)int != int"}, + {errTarget, errCleanup, + "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " + + errCleanup.type() + " != " + errTarget.type()}, + {TryFinally.MH_voidTarget, TryFinally.MH_voidCleanup, + "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " + + TryFinally.MH_voidCleanup.type() + " != " + TryFinally.MH_voidTarget.type()} + }; + } + + @Test(dataProvider = "negativeTestData") + public static void testTryFinallyNegative(MethodHandle target, MethodHandle cleanup, String expectedMessage) { + boolean caught = false; + try { + MethodHandles.tryFinally(target, cleanup); + } catch (IllegalArgumentException iae) { + assertEquals(expectedMessage, iae.getMessage()); + caught = true; + } + assertTrue(caught); + } + + static class TryFinally { + + static String greet(String whom) { + return "Hello, " + whom; + } + + static String exclaim(Throwable t, String r, String whom) { + return r + "!"; + } + + static void print(String what) { + System.out.print("Hello, " + what); + } + + static void printMore(Throwable t, String what) { + System.out.println("!"); + } + + static String greetMore(String first, String second) { + return "Hello, " + first + " and " + second; + } + + static String exclaimMore(Throwable t, String r, String first) { + return r + " (but " + first + " first)!"; + } + + static void voidTarget() {} + + static void voidCleanup(Throwable t, int a) {} + + static final Class TRY_FINALLY = TryFinally.class; + + static final MethodType MT_greet = methodType(String.class, String.class); + static final MethodType MT_exclaim = methodType(String.class, Throwable.class, String.class, String.class); + static final MethodType MT_print = methodType(void.class, String.class); + static final MethodType MT_printMore = methodType(void.class, Throwable.class, String.class); + static final MethodType MT_greetMore = methodType(String.class, String.class, String.class); + static final MethodType MT_exclaimMore = methodType(String.class, Throwable.class, String.class, String.class); + static final MethodType MT_voidTarget = methodType(void.class); + static final MethodType MT_voidCleanup = methodType(void.class, Throwable.class, int.class); + + static final MethodHandle MH_greet; + static final MethodHandle MH_exclaim; + static final MethodHandle MH_print; + static final MethodHandle MH_printMore; + static final MethodHandle MH_greetMore; + static final MethodHandle MH_exclaimMore; + static final MethodHandle MH_voidTarget; + static final MethodHandle MH_voidCleanup; + + static final MethodType MT_hello = methodType(String.class, String.class); + static final MethodType MT_printHello = methodType(void.class, String.class); + static final MethodType MT_moreHello = methodType(String.class, String.class, String.class); + + static { + try { + MH_greet = LOOKUP.findStatic(TRY_FINALLY, "greet", MT_greet); + MH_exclaim = LOOKUP.findStatic(TRY_FINALLY, "exclaim", MT_exclaim); + MH_print = LOOKUP.findStatic(TRY_FINALLY, "print", MT_print); + MH_printMore = LOOKUP.findStatic(TRY_FINALLY, "printMore", MT_printMore); + MH_greetMore = LOOKUP.findStatic(TRY_FINALLY, "greetMore", MT_greetMore); + MH_exclaimMore = LOOKUP.findStatic(TRY_FINALLY, "exclaimMore", MT_exclaimMore); + MH_voidTarget = LOOKUP.findStatic(TRY_FINALLY, "voidTarget", MT_voidTarget); + MH_voidCleanup = LOOKUP.findStatic(TRY_FINALLY, "voidCleanup", MT_voidCleanup); + } catch (Exception e) { + throw new ExceptionInInitializerError(e); + } + } + + } + +} --- old/test/java/lang/invoke/T8139885.java 2016-03-02 13:44:03.000000000 +0100 +++ /dev/null 2016-03-02 13:44:03.000000000 +0100 @@ -1,1267 +0,0 @@ -/* - * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -/* @test - * @bug 8139885 - * @bug 8143798 - * @bug 8150825 - * @bug 8150635 - * @run testng/othervm -ea -esa test.java.lang.invoke.T8139885 - */ - -package test.java.lang.invoke; - -import java.io.StringWriter; -import java.lang.invoke.MethodHandle; -import java.lang.invoke.MethodHandles; -import java.lang.invoke.MethodHandles.Lookup; -import java.lang.invoke.MethodType; -import java.lang.invoke.WrongMethodTypeException; -import java.util.*; - -import static java.lang.invoke.MethodType.methodType; - -import static org.testng.AssertJUnit.*; - -import org.testng.annotations.*; - -/** - * Example-scale and negative tests for JEP 274 extensions. - */ -public class T8139885 { - - static final Lookup LOOKUP = MethodHandles.lookup(); - - // - // Tests. - // - - @Test - public static void testLoopFac() throws Throwable { - MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc}; - MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; - MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); - assertEquals(Fac.MT_fac, loop.type()); - assertEquals(120, loop.invoke(5)); - } - - @Test - public static void testLoopFacNullInit() throws Throwable { - // null initializer for counter, should initialize to 0 - MethodHandle[] counterClause = new MethodHandle[]{null, Fac.MH_inc}; - MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; - MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); - assertEquals(Fac.MT_fac, loop.type()); - assertEquals(120, loop.invoke(5)); - } - - @Test - public static void testLoopNullInit() throws Throwable { - // null initializer for counter, should initialize to 0, one-clause loop - MethodHandle[] counterClause = new MethodHandle[]{null, Loop.MH_inc, Loop.MH_pred, Loop.MH_fin}; - MethodHandle loop = MethodHandles.loop(counterClause); - assertEquals(Loop.MT_loop, loop.type()); - assertEquals(10, loop.invoke(10)); - } - - @Test - public static void testLoopVoid1() throws Throwable { - // construct a post-checked loop that only does one iteration and has a void body and void local state - MethodHandle loop = MethodHandles.loop(new MethodHandle[]{Empty.MH_f, Empty.MH_f, Empty.MH_pred, null}); - assertEquals(MethodType.methodType(void.class), loop.type()); - loop.invoke(); - } - - @Test - public static void testLoopVoid2() throws Throwable { - // construct a post-checked loop that only does one iteration and has a void body and void local state, - // initialized implicitly from the step type - MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, null}); - assertEquals(MethodType.methodType(void.class), loop.type()); - loop.invoke(); - } - - @Test - public static void testLoopVoid3() throws Throwable { - // construct a post-checked loop that only does one iteration and has a void body and void local state, - // and that has a void finalizer - MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_f}); - assertEquals(MethodType.methodType(void.class), loop.type()); - loop.invoke(); - } - - @Test - public static void testLoopFacWithVoidState() throws Throwable { - // like testLoopFac, but with additional void state that outputs a dot - MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc}; - MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}; - MethodHandle[] dotClause = new MethodHandle[]{null, Fac.MH_dot}; - MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause, dotClause); - assertEquals(Fac.MT_fac, loop.type()); - assertEquals(120, loop.invoke(5)); - } - - @Test - public static void testLoopVoidInt() throws Throwable { - // construct a post-checked loop that only does one iteration and has a void body and void local state, - // and that returns a constant - MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_c}); - assertEquals(MethodType.methodType(int.class), loop.type()); - assertEquals(23, loop.invoke()); - } - - @Test - public static void testLoopWithVirtuals() throws Throwable { - // construct a loop (to calculate factorial) that uses a mix of static and virtual methods - MethodHandle[] counterClause = new MethodHandle[]{null, LoopWithVirtuals.permute(LoopWithVirtuals.MH_inc)}; - MethodHandle[] accumulatorClause = new MethodHandle[]{ - // init function must indicate the loop arguments (there is no other means to determine them) - MethodHandles.dropArguments(LoopWithVirtuals.MH_one, 0, LoopWithVirtuals.class), - LoopWithVirtuals.permute(LoopWithVirtuals.MH_mult), - LoopWithVirtuals.permute(LoopWithVirtuals.MH_pred), - LoopWithVirtuals.permute(LoopWithVirtuals.MH_fin) - }; - MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause); - assertEquals(LoopWithVirtuals.MT_loop, loop.type()); - assertEquals(120, loop.invoke(new LoopWithVirtuals(), 5)); - } - - @Test - public static void testLoopNegative() throws Throwable { - MethodHandle mh_loop = - LOOKUP.findStatic(MethodHandles.class, "loop", methodType(MethodHandle.class, MethodHandle[][].class)); - MethodHandle i0 = MethodHandles.constant(int.class, 0); - MethodHandle ii = MethodHandles.dropArguments(i0, 0, int.class, int.class); - MethodHandle id = MethodHandles.dropArguments(i0, 0, int.class, double.class); - MethodHandle i3 = MethodHandles.dropArguments(i0, 0, int.class, int.class, int.class); - List inits = Arrays.asList(ii, id, i3); - List> ints = Arrays.asList(int.class, int.class, int.class); - List finis = Arrays.asList(Fac.MH_fin, Fac.MH_inc, Counted.MH_step); - List preds1 = Arrays.asList(null, null, null); - List preds2 = Arrays.asList(null, Fac.MH_fin, null); - MethodHandle eek = MethodHandles.dropArguments(i0, 0, int.class, int.class, double.class); - List nesteps = Arrays.asList(Fac.MH_inc, eek, Fac.MH_dot); - List nepreds = Arrays.asList(null, Fac.MH_pred, null); - List nefinis = Arrays.asList(null, Fac.MH_fin, null); - List lvsteps = Arrays.asList(LoopWithVirtuals.MH_inc, LoopWithVirtuals.MH_mult); - List lvpreds = Arrays.asList(null, LoopWithVirtuals.MH_pred); - List lvfinis = Arrays.asList(null, LoopWithVirtuals.MH_fin); - MethodHandle[][][] cases = { - /* 1 */ null, - /* 2 */ {}, - /* 3 */ {{null, Fac.MH_inc}, {Fac.MH_one, null, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}}, - /* 4 */ {{null, Fac.MH_inc}, null}, - /* 5 */ {{Fac.MH_zero, Fac.MH_dot}}, - /* 6 */ {{ii}, {id}, {i3}}, - /* 7 */ {{null, Fac.MH_inc, null, Fac.MH_fin}, {null, Fac.MH_inc, null, Fac.MH_inc}, - {null, Counted.MH_start, null, Counted.MH_step}}, - /* 8 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, null, Fac.MH_fin}, {null, Fac.MH_dot}}, - /* 9 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, Fac.MH_fin, Fac.MH_fin}, {null, Fac.MH_dot}}, - /* 10 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, eek, Fac.MH_pred, Fac.MH_fin}, {null, Fac.MH_dot}}, - /* 11 */ {{null, LoopWithVirtuals.MH_inc}, {LoopWithVirtuals.MH_one, LoopWithVirtuals.MH_mult, LoopWithVirtuals.MH_pred, LoopWithVirtuals.MH_fin}} - }; - String[] messages = { - /* 1 */ "null or no clauses passed", - /* 2 */ "null or no clauses passed", - /* 3 */ "All loop clauses must be represented as MethodHandle arrays with at most 4 elements.", - /* 4 */ "null clauses are not allowed", - /* 5 */ "clause 0: init and step return types must match: int != void", - /* 6 */ "found non-effectively identical init parameter type lists: " + inits + - " (common suffix: " + ints + ")", - /* 7 */ "found non-identical finalizer return types: " + finis + " (return type: int)", - /* 8 */ "no predicate found: " + preds1, - /* 9 */ "predicates must have boolean return type: " + preds2, - /* 10 */ "found non-effectively identical parameter type lists:\nstep: " + nesteps + - "\npred: " + nepreds + "\nfini: " + nefinis + " (common parameter sequence: " + ints + ")", - /* 11 */ "found non-effectively identical parameter type lists:\nstep: " + lvsteps + - "\npred: " + lvpreds + "\nfini: " + lvfinis + " (common parameter sequence: " + ints + ")" - }; - for (int i = 0; i < cases.length; ++i) { - boolean caught = false; - try { - mh_loop.invokeWithArguments(cases[i]); - } catch (IllegalArgumentException iae) { - assertEquals(messages[i], iae.getMessage()); - caught = true; - } - assertTrue(caught); - } - } - - @Test - public static void testWhileLoop() throws Throwable { - // int i = 0; while (i < limit) { ++i; } return i; => limit - MethodHandle loop = MethodHandles.whileLoop(While.MH_zero, While.MH_pred, While.MH_step); - assertEquals(While.MT_while, loop.type()); - assertEquals(23, loop.invoke(23)); - } - - @Test - public static void testWhileLoopNoIteration() throws Throwable { - // a while loop that never executes its body because the predicate evaluates to false immediately - MethodHandle loop = MethodHandles.whileLoop(While.MH_initString, While.MH_predString, While.MH_stepString); - assertEquals(While.MT_string, loop.type()); - assertEquals("a", loop.invoke()); - } - - @Test - public static void testDoWhileLoop() throws Throwable { - // int i = 0; do { ++i; } while (i < limit); return i; => limit - MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zero, While.MH_step, While.MH_pred); - assertEquals(While.MT_while, loop.type()); - assertEquals(23, loop.invoke(23)); - } - - @Test - public static void testWhileZip() throws Throwable { - MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zipInitZip, While.MH_zipStep, While.MH_zipPred); - assertEquals(While.MT_zip, loop.type()); - List a = Arrays.asList("a", "b", "c", "d"); - List b = Arrays.asList("e", "f", "g", "h"); - List zipped = Arrays.asList("a", "e", "b", "f", "c", "g", "d", "h"); - assertEquals(zipped, (List) loop.invoke(a.iterator(), b.iterator())); - } - - @Test - public static void testCountedLoop() throws Throwable { - // String s = "Lambdaman!"; for (int i = 0; i < 13; ++i) { s = "na " + s; } return s; => a variation on a well known theme - MethodHandle fit13 = MethodHandles.constant(int.class, 13); - MethodHandle loop = MethodHandles.countedLoop(fit13, Counted.MH_start, Counted.MH_step); - assertEquals(Counted.MT_counted, loop.type()); - assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!")); - } - - @Test - public static void testCountedArrayLoop() throws Throwable { - // int[] a = new int[]{0}; for (int i = 0; i < 13; ++i) { ++a[0]; } => a[0] == 13 - MethodHandle fit13 = MethodHandles.dropArguments(MethodHandles.constant(int.class, 13), 0, int[].class); - MethodHandle loop = MethodHandles.countedLoop(fit13, null, Counted.MH_stepUpdateArray); - assertEquals(Counted.MT_arrayCounted, loop.type()); - int[] a = new int[]{0}; - loop.invoke(a); - assertEquals(13, a[0]); - } - - @Test - public static void testCountedPrintingLoop() throws Throwable { - MethodHandle fit5 = MethodHandles.constant(int.class, 5); - MethodHandle loop = MethodHandles.countedLoop(fit5, null, Counted.MH_printHello); - assertEquals(Counted.MT_countedPrinting, loop.type()); - loop.invoke(); - } - - @Test - public static void testCountedRangeLoop() throws Throwable { - // String s = "Lambdaman!"; for (int i = -5; i < 8; ++i) { s = "na " + s; } return s; => a well known theme - MethodHandle fitm5 = MethodHandles.dropArguments(Counted.MH_m5, 0, String.class); - MethodHandle fit8 = MethodHandles.dropArguments(Counted.MH_8, 0, String.class); - MethodHandle loop = MethodHandles.countedLoop(fitm5, fit8, Counted.MH_start, Counted.MH_step); - assertEquals(Counted.MT_counted, loop.type()); - assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!")); - } - - @Test - public static void testIterateSum() throws Throwable { - // Integer[] a = new Integer[]{1,2,3,4,5,6}; int sum = 0; for (int e : a) { sum += e; } return sum; => 21 - MethodHandle loop = MethodHandles.iteratedLoop(Iterate.MH_sumIterator, Iterate.MH_sumInit, Iterate.MH_sumStep); - assertEquals(Iterate.MT_sum, loop.type()); - assertEquals(21, loop.invoke(new Integer[]{1, 2, 3, 4, 5, 6})); - } - - @Test - public static void testIterateReverse() throws Throwable { - MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_reverseInit, Iterate.MH_reverseStep); - assertEquals(Iterate.MT_reverse, loop.type()); - List list = Arrays.asList("a", "b", "c", "d", "e"); - List reversedList = Arrays.asList("e", "d", "c", "b", "a"); - assertEquals(reversedList, (List) loop.invoke(list)); - } - - @Test - public static void testIterateLength() throws Throwable { - MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_lengthInit, Iterate.MH_lengthStep); - assertEquals(Iterate.MT_length, loop.type()); - List list = Arrays.asList(23.0, 148.0, 42.0); - assertEquals(list.size(), (int) loop.invoke(list)); - } - - @Test - public static void testIterateMap() throws Throwable { - MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_mapInit, Iterate.MH_mapStep); - assertEquals(Iterate.MT_map, loop.type()); - List list = Arrays.asList("Hello", "world", "!"); - List upList = Arrays.asList("HELLO", "WORLD", "!"); - assertEquals(upList, (List) loop.invoke(list)); - } - - @Test - public static void testIteratePrint() throws Throwable { - MethodHandle loop = MethodHandles.iteratedLoop(null, null, Iterate.MH_printStep); - assertEquals(Iterate.MT_print, loop.type()); - loop.invoke(Arrays.asList("hello", "world")); - } - - @Test - public static void testIterateNullBody() { - boolean caught = false; - try { - MethodHandles.iteratedLoop(MethodHandles.identity(int.class), MethodHandles.identity(int.class), null); - } catch (IllegalArgumentException iae) { - assertEquals("iterated loop body must not be null", iae.getMessage()); - caught = true; - } - assertTrue(caught); - } - - @Test - public static void testTryFinally() throws Throwable { - MethodHandle hello = MethodHandles.tryFinally(TryFinally.MH_greet, TryFinally.MH_exclaim); - assertEquals(TryFinally.MT_hello, hello.type()); - assertEquals("Hello, world!", hello.invoke("world")); - } - - @Test - public static void testTryFinallyVoid() throws Throwable { - MethodHandle tfVoid = MethodHandles.tryFinally(TryFinally.MH_print, TryFinally.MH_printMore); - assertEquals(TryFinally.MT_printHello, tfVoid.type()); - tfVoid.invoke("world"); - } - - @Test - public static void testTryFinallySublist() throws Throwable { - MethodHandle helloMore = MethodHandles.tryFinally(TryFinally.MH_greetMore, TryFinally.MH_exclaimMore); - assertEquals(TryFinally.MT_moreHello, helloMore.type()); - assertEquals("Hello, world and universe (but world first)!", helloMore.invoke("world", "universe")); - } - - @Test - public static void testTryFinallyNegative() { - MethodHandle intid = MethodHandles.identity(int.class); - MethodHandle intco = MethodHandles.constant(int.class, 0); - MethodHandle errTarget = MethodHandles.dropArguments(intco, 0, int.class, double.class, String.class, int.class); - MethodHandle errCleanup = MethodHandles.dropArguments(MethodHandles.constant(int.class, 0), 0, Throwable.class, - int.class, double.class, Object.class); - MethodHandle[][] cases = { - {intid, MethodHandles.identity(double.class)}, - {intid, MethodHandles.dropArguments(intid, 0, String.class)}, - {intid, MethodHandles.dropArguments(intid, 0, Throwable.class, double.class)}, - {errTarget, errCleanup}, - {TryFinally.MH_voidTarget, TryFinally.MH_voidCleanup} - }; - String[] messages = { - "target and return types must match: double != int", - "cleanup first argument and Throwable must match: (String,int)int != class java.lang.Throwable", - "cleanup second argument and target return type must match: (Throwable,double,int)int != int", - "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " + - errCleanup.type() + " != " + errTarget.type(), - "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " + - TryFinally.MH_voidCleanup.type() + " != " + TryFinally.MH_voidTarget.type() - }; - for (int i = 0; i < cases.length; ++i) { - boolean caught = false; - try { - MethodHandles.tryFinally(cases[i][0], cases[i][1]); - } catch (IllegalArgumentException iae) { - assertEquals(messages[i], iae.getMessage()); - caught = true; - } - assertTrue(caught); - } - } - - @Test - public static void testFold0a() throws Throwable { - // equivalence to foldArguments(MethodHandle,MethodHandle) - MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 0, Fold.MH_adder); - assertEquals(Fold.MT_folded1, fold.type()); - assertEquals(720, (int) fold.invoke(3, 4, 5)); - } - - @Test - public static void testFold1a() throws Throwable { - // test foldArguments for folding position 1 - MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 1, Fold.MH_adder1); - assertEquals(Fold.MT_folded1, fold.type()); - assertEquals(540, (int) fold.invoke(3, 4, 5)); - } - - @Test - public static void testFold0b() throws Throwable { - // test foldArguments equivalence with multiple types - MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 0, Fold.MH_comb); - assertEquals(Fold.MT_folded2, fold.type()); - assertEquals(23, (int) fold.invoke("true", true, 23)); - } - - @Test - public static void testFold1b() throws Throwable { - // test folgArguments for folding position 1, with multiple types - MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 1, Fold.MH_comb2); - assertEquals(Fold.MT_folded3, fold.type()); - assertEquals(1, (int) fold.invoke(true, true, 1)); - assertEquals(-1, (int) fold.invoke(true, false, -1)); - } - - @Test - public static void testFoldArgumentsExample() throws Throwable { - // test the JavaDoc foldArguments-with-pos example - StringWriter swr = new StringWriter(); - MethodHandle trace = LOOKUP.findVirtual(StringWriter.class, "write", methodType(void.class, String.class)).bindTo(swr); - MethodHandle cat = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class)); - assertEquals("boojum", (String) cat.invokeExact("boo", "jum")); - MethodHandle catTrace = MethodHandles.foldArguments(cat, 1, trace); - assertEquals("boojum", (String) catTrace.invokeExact("boo", "jum")); - assertEquals("jum", swr.toString()); - } - - @Test - public static void testAsSpreader() throws Throwable { - MethodHandle spreader = SpreadCollect.MH_forSpreading.asSpreader(1, int[].class, 3); - assertEquals(SpreadCollect.MT_spreader, spreader.type()); - assertEquals("A456B", (String) spreader.invoke("A", new int[]{4, 5, 6}, "B")); - } - - @Test - public static void testAsSpreaderExample() throws Throwable { - // test the JavaDoc asSpreader-with-pos example - MethodHandle compare = LOOKUP.findStatic(Objects.class, "compare", methodType(int.class, Object.class, Object.class, Comparator.class)); - MethodHandle compare2FromArray = compare.asSpreader(0, Object[].class, 2); - Object[] ints = new Object[]{3, 9, 7, 7}; - Comparator cmp = (a, b) -> a - b; - assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 0, 2), cmp) < 0); - assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 1, 3), cmp) > 0); - assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 2, 4), cmp) == 0); - } - - @Test - public static void testAsSpreaderIllegalPos() throws Throwable { - int[] illegalPos = {-7, 3, 19}; - int caught = 0; - for (int p : illegalPos) { - try { - SpreadCollect.MH_forSpreading.asSpreader(p, Object[].class, 3); - } catch (IllegalArgumentException iae) { - assertEquals("bad spread position", iae.getMessage()); - ++caught; - } - } - assertEquals(illegalPos.length, caught); - } - - @Test - public static void testAsSpreaderIllegalMethodType() throws Throwable { - MethodHandle h = MethodHandles.dropArguments(MethodHandles.constant(String.class, ""), 0, int.class, int.class); - boolean caught = false; - try { - MethodHandle s = h.asSpreader(String[].class, 1); - } catch (WrongMethodTypeException wmte) { - caught = true; - } - assertTrue(caught); - } - - @Test - public static void testAsCollector() throws Throwable { - MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1); - assertEquals(SpreadCollect.MT_collector1, collector.type()); - assertEquals("A4B", (String) collector.invoke("A", 4, "B")); - collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2); - assertEquals(SpreadCollect.MT_collector2, collector.type()); - assertEquals("A45B", (String) collector.invoke("A", 4, 5, "B")); - collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3); - assertEquals(SpreadCollect.MT_collector3, collector.type()); - assertEquals("A456B", (String) collector.invoke("A", 4, 5, 6, "B")); - } - - @Test - public static void testAsCollectorInvokeWithArguments() throws Throwable { - MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1); - assertEquals(SpreadCollect.MT_collector1, collector.type()); - assertEquals("A4B", (String) collector.invokeWithArguments("A", 4, "B")); - collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2); - assertEquals(SpreadCollect.MT_collector2, collector.type()); - assertEquals("A45B", (String) collector.invokeWithArguments("A", 4, 5, "B")); - collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3); - assertEquals(SpreadCollect.MT_collector3, collector.type()); - assertEquals("A456B", (String) collector.invokeWithArguments("A", 4, 5, 6, "B")); - } - - @Test - public static void testAsCollectorLeading() throws Throwable { - MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1); - assertEquals(SpreadCollect.MT_collectorLeading1, collector.type()); - assertEquals("7Q", (String) collector.invoke(7, "Q")); - collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2); - assertEquals(SpreadCollect.MT_collectorLeading2, collector.type()); - assertEquals("78Q", (String) collector.invoke(7, 8, "Q")); - collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3); - assertEquals(SpreadCollect.MT_collectorLeading3, collector.type()); - assertEquals("789Q", (String) collector.invoke(7, 8, 9, "Q")); - } - - @Test - public static void testAsCollectorLeadingInvokeWithArguments() throws Throwable { - MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1); - assertEquals(SpreadCollect.MT_collectorLeading1, collector.type()); - assertEquals("7Q", (String) collector.invokeWithArguments(7, "Q")); - collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2); - assertEquals(SpreadCollect.MT_collectorLeading2, collector.type()); - assertEquals("78Q", (String) collector.invokeWithArguments(7, 8, "Q")); - collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3); - assertEquals(SpreadCollect.MT_collectorLeading3, collector.type()); - assertEquals("789Q", (String) collector.invokeWithArguments(7, 8, 9, "Q")); - } - - @Test - public static void testAsCollectorNone() throws Throwable { - MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 0); - assertEquals(SpreadCollect.MT_collector0, collector.type()); - assertEquals("AB", (String) collector.invoke("A", "B")); - } - - @Test - public static void testAsCollectorIllegalPos() throws Throwable { - int[] illegalPos = {-1, 17}; - int caught = 0; - for (int p : illegalPos) { - try { - SpreadCollect.MH_forCollecting.asCollector(p, int[].class, 0); - } catch (IllegalArgumentException iae) { - assertEquals("bad collect position", iae.getMessage()); - ++caught; - } - } - assertEquals(illegalPos.length, caught); - } - - @Test - public static void testAsCollectorExample() throws Throwable { - // test the JavaDoc asCollector-with-pos example - StringWriter swr = new StringWriter(); - MethodHandle swWrite = LOOKUP. - findVirtual(StringWriter.class, "write", methodType(void.class, char[].class, int.class, int.class)). - bindTo(swr); - MethodHandle swWrite4 = swWrite.asCollector(0, char[].class, 4); - swWrite4.invoke('A', 'B', 'C', 'D', 1, 2); - assertEquals("BC", swr.toString()); - swWrite4.invoke('P', 'Q', 'R', 'S', 0, 4); - assertEquals("BCPQRS", swr.toString()); - swWrite4.invoke('W', 'X', 'Y', 'Z', 3, 1); - assertEquals("BCPQRSZ", swr.toString()); - } - - @Test - public static void testFindSpecial() throws Throwable { - FindSpecial.C c = new FindSpecial.C(); - assertEquals("I1.m", c.m()); - MethodType t = MethodType.methodType(String.class); - MethodHandle ci1m = LOOKUP.findSpecial(FindSpecial.I1.class, "m", t, FindSpecial.C.class); - assertEquals("I1.m", (String) ci1m.invoke(c)); - } - - @Test - public static void testFindSpecialAbstract() throws Throwable { - FindSpecial.C c = new FindSpecial.C(); - assertEquals("q", c.q()); - MethodType t = MethodType.methodType(String.class); - boolean caught = false; - try { - MethodHandle ci3q = LOOKUP.findSpecial(FindSpecial.I3.class, "q", t, FindSpecial.C.class); - } catch (Throwable thrown) { - if (!(thrown instanceof IllegalAccessException) || !FindSpecial.ABSTRACT_ERROR.equals(thrown.getMessage())) { - throw new AssertionError(thrown.getMessage(), thrown); - } - caught = true; - } - assertTrue(caught); - } - - @Test - public static void testFindClassCNFE() throws Throwable { - boolean caught = false; - try { - LOOKUP.findClass("does.not.Exist"); - } catch (ClassNotFoundException cnfe) { - caught = true; - } - assertTrue(caught); - } - - // - // Methods used to assemble tests. - // - - static class Empty { - - static void f() { } - - static boolean pred() { - return false; - } - - static int c() { - return 23; - } - - static final Class EMPTY = Empty.class; - - static final MethodType MT_f = methodType(void.class); - static final MethodType MT_pred = methodType(boolean.class); - static final MethodType MT_c = methodType(int.class); - - static final MethodHandle MH_f; - static final MethodHandle MH_pred; - static final MethodHandle MH_c; - - static { - try { - MH_f = LOOKUP.findStatic(EMPTY, "f", MT_f); - MH_pred = LOOKUP.findStatic(EMPTY, "pred", MT_pred); - MH_c = LOOKUP.findStatic(EMPTY, "c", MT_c); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - } - - static class Fac { - - static int zero(int k) { - return 0; - } - - static int one(int k) { - return 1; - } - - static boolean pred(int i, int acc, int k) { - return i < k; - } - - static int inc(int i, int acc, int k) { - return i + 1; - } - - static int mult(int i, int acc, int k) { - return i * acc; - } - - static void dot(int i, int acc, int k) { - System.out.print('.'); - } - - static int fin(int i, int acc, int k) { - return acc; - } - - static final Class FAC = Fac.class; - - static final MethodType MT_init = methodType(int.class, int.class); - static final MethodType MT_fn = methodType(int.class, int.class, int.class, int.class); - static final MethodType MT_dot = methodType(void.class, int.class, int.class, int.class); - static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class); - - static final MethodHandle MH_zero; - static final MethodHandle MH_one; - static final MethodHandle MH_pred; - static final MethodHandle MH_inc; - static final MethodHandle MH_mult; - static final MethodHandle MH_dot; - static final MethodHandle MH_fin; - - static final MethodType MT_fac = methodType(int.class, int.class); - - static { - try { - MH_zero = LOOKUP.findStatic(FAC, "zero", MT_init); - MH_one = LOOKUP.findStatic(FAC, "one", MT_init); - MH_pred = LOOKUP.findStatic(FAC, "pred", MT_pred); - MH_inc = LOOKUP.findStatic(FAC, "inc", MT_fn); - MH_mult = LOOKUP.findStatic(FAC, "mult", MT_fn); - MH_dot = LOOKUP.findStatic(FAC, "dot", MT_dot); - MH_fin = LOOKUP.findStatic(FAC, "fin", MT_fn); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class Loop { - - static int inc(int i, int k) { - return i + 1; - } - - static boolean pred(int i, int k) { - return i < k; - } - - static int fin(int i, int k) { - return k; - } - - static final Class LOOP = Loop.class; - - static final MethodType MT_inc = methodType(int.class, int.class, int.class); - static final MethodType MT_pred = methodType(boolean.class, int.class, int.class); - static final MethodType MT_fin = methodType(int.class, int.class, int.class); - - static final MethodHandle MH_inc; - static final MethodHandle MH_pred; - static final MethodHandle MH_fin; - - static final MethodType MT_loop = methodType(int.class, int.class); - - static { - try { - MH_inc = LOOKUP.findStatic(LOOP, "inc", MT_inc); - MH_pred = LOOKUP.findStatic(LOOP, "pred", MT_pred); - MH_fin = LOOKUP.findStatic(LOOP, "fin", MT_fin); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class LoopWithVirtuals { - - static int one(int k) { - return 1; - } - - int inc(int i, int acc, int k) { - return i + 1; - } - - int mult(int i, int acc, int k) { - return i * acc; - } - - boolean pred(int i, int acc, int k) { - return i < k; - } - - int fin(int i, int acc, int k) { - return acc; - } - - static final Class LOOP_WITH_VIRTUALS = LoopWithVirtuals.class; - - static final MethodType MT_one = methodType(int.class, int.class); - static final MethodType MT_inc = methodType(int.class, int.class, int.class, int.class); - static final MethodType MT_mult = methodType(int.class, int.class, int.class, int.class); - static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class); - static final MethodType MT_fin = methodType(int.class, int.class, int.class, int.class); - - static final MethodHandle MH_one; - static final MethodHandle MH_inc; - static final MethodHandle MH_mult; - static final MethodHandle MH_pred; - static final MethodHandle MH_fin; - - static final MethodType MT_loop = methodType(int.class, LOOP_WITH_VIRTUALS, int.class); - - static { - try { - MH_one = LOOKUP.findStatic(LOOP_WITH_VIRTUALS, "one", MT_one); - MH_inc = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "inc", MT_inc); - MH_mult = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "mult", MT_mult); - MH_pred = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "pred", MT_pred); - MH_fin = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "fin", MT_fin); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - static MethodHandle permute(MethodHandle h) { - // The handles representing virtual methods need to be rearranged to match the required order of arguments - // (loop-local state comes first, then loop arguments). As the receiver comes first in the signature but is - // a loop argument, it must be moved to the appropriate position in the signature. - return MethodHandles.permuteArguments(h, - methodType(h.type().returnType(), int.class, int.class, LOOP_WITH_VIRTUALS, int.class), 2, 0, 1, 3); - } - - } - - static class While { - - static int zero(int limit) { - return 0; - } - - static boolean pred(int i, int limit) { - return i < limit; - } - - static int step(int i, int limit) { - return i + 1; - } - - static String initString() { - return "a"; - } - - static boolean predString(String s) { - return s.length() != 1; - } - - static String stepString(String s) { - return s + "a"; - } - - static List zipInitZip(Iterator a, Iterator b) { - return new ArrayList<>(); - } - - static boolean zipPred(List zip, Iterator a, Iterator b) { - return a.hasNext() && b.hasNext(); - } - - static List zipStep(List zip, Iterator a, Iterator b) { - zip.add(a.next()); - zip.add(b.next()); - return zip; - } - - static final Class WHILE = While.class; - - static final MethodType MT_zero = methodType(int.class, int.class); - static final MethodType MT_pred = methodType(boolean.class, int.class, int.class); - static final MethodType MT_fn = methodType(int.class, int.class, int.class); - static final MethodType MT_initString = methodType(String.class); - static final MethodType MT_predString = methodType(boolean.class, String.class); - static final MethodType MT_stepString = methodType(String.class, String.class); - static final MethodType MT_zipInitZip = methodType(List.class, Iterator.class, Iterator.class); - static final MethodType MT_zipPred = methodType(boolean.class, List.class, Iterator.class, Iterator.class); - static final MethodType MT_zipStep = methodType(List.class, List.class, Iterator.class, Iterator.class); - - static final MethodHandle MH_zero; - static final MethodHandle MH_pred; - static final MethodHandle MH_step; - static final MethodHandle MH_initString; - static final MethodHandle MH_predString; - static final MethodHandle MH_stepString; - static final MethodHandle MH_zipInitZip; - static final MethodHandle MH_zipPred; - static final MethodHandle MH_zipStep; - - static final MethodType MT_while = methodType(int.class, int.class); - static final MethodType MT_string = methodType(String.class); - static final MethodType MT_zip = methodType(List.class, Iterator.class, Iterator.class); - - static { - try { - MH_zero = LOOKUP.findStatic(WHILE, "zero", MT_zero); - MH_pred = LOOKUP.findStatic(WHILE, "pred", MT_pred); - MH_step = LOOKUP.findStatic(WHILE, "step", MT_fn); - MH_initString = LOOKUP.findStatic(WHILE, "initString", MT_initString); - MH_predString = LOOKUP.findStatic(WHILE, "predString", MT_predString); - MH_stepString = LOOKUP.findStatic(WHILE, "stepString", MT_stepString); - MH_zipInitZip = LOOKUP.findStatic(WHILE, "zipInitZip", MT_zipInitZip); - MH_zipPred = LOOKUP.findStatic(WHILE, "zipPred", MT_zipPred); - MH_zipStep = LOOKUP.findStatic(WHILE, "zipStep", MT_zipStep); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class Counted { - - static String start(String arg) { - return arg; - } - - static String step(int counter, String v, String arg) { - return "na " + v; - } - - static void stepUpdateArray(int counter, int[] a) { - ++a[0]; - } - - static void printHello(int counter) { - System.out.print("hello"); - } - - static final Class COUNTED = Counted.class; - - static final MethodType MT_start = methodType(String.class, String.class); - static final MethodType MT_step = methodType(String.class, int.class, String.class, String.class); - static final MethodType MT_stepUpdateArray = methodType(void.class, int.class, int[].class); - static final MethodType MT_printHello = methodType(void.class, int.class); - - static final MethodHandle MH_13; - static final MethodHandle MH_m5; - static final MethodHandle MH_8; - static final MethodHandle MH_start; - static final MethodHandle MH_step; - static final MethodHandle MH_stepUpdateArray; - static final MethodHandle MH_printHello; - - static final MethodType MT_counted = methodType(String.class, String.class); - static final MethodType MT_arrayCounted = methodType(void.class, int[].class); - static final MethodType MT_countedPrinting = methodType(void.class); - - static { - try { - MH_13 = MethodHandles.constant(int.class, 13); - MH_m5 = MethodHandles.constant(int.class, -5); - MH_8 = MethodHandles.constant(int.class, 8); - MH_start = LOOKUP.findStatic(COUNTED, "start", MT_start); - MH_step = LOOKUP.findStatic(COUNTED, "step", MT_step); - MH_stepUpdateArray = LOOKUP.findStatic(COUNTED, "stepUpdateArray", MT_stepUpdateArray); - MH_printHello = LOOKUP.findStatic(COUNTED, "printHello", MT_printHello); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class Iterate { - - static Iterator sumIterator(Integer[] a) { - return Arrays.asList(a).iterator(); - } - - static int sumInit(Integer[] a) { - return 0; - } - - static int sumStep(int s, int e, Integer[] a) { - return s + e; - } - - static List reverseInit(List l) { - return new ArrayList<>(); - } - - static List reverseStep(String e, List r, List l) { - r.add(0, e); - return r; - } - - static int lengthInit(List l) { - return 0; - } - - static int lengthStep(Object o, int len, List l) { - return len + 1; - } - - static List mapInit(List l) { - return new ArrayList<>(); - } - - static List mapStep(String e, List r, List l) { - r.add(e.toUpperCase()); - return r; - } - - static void printStep(String s, List l) { - System.out.print(s); - } - - static final Class ITERATE = Iterate.class; - - static final MethodType MT_sumIterator = methodType(Iterator.class, Integer[].class); - - static final MethodType MT_sumInit = methodType(int.class, Integer[].class); - static final MethodType MT_reverseInit = methodType(List.class, List.class); - static final MethodType MT_lenghInit = methodType(int.class, List.class); - static final MethodType MT_mapInit = methodType(List.class, List.class); - - static final MethodType MT_sumStep = methodType(int.class, int.class, int.class, Integer[].class); - static final MethodType MT_reverseStep = methodType(List.class, String.class, List.class, List.class); - static final MethodType MT_lengthStep = methodType(int.class, Object.class, int.class, List.class); - static final MethodType MT_mapStep = methodType(List.class, String.class, List.class, List.class); - static final MethodType MT_printStep = methodType(void.class, String.class, List.class); - - static final MethodHandle MH_sumIterator; - static final MethodHandle MH_sumInit; - static final MethodHandle MH_sumStep; - static final MethodHandle MH_printStep; - - static final MethodHandle MH_reverseInit; - static final MethodHandle MH_reverseStep; - - static final MethodHandle MH_lengthInit; - static final MethodHandle MH_lengthStep; - - static final MethodHandle MH_mapInit; - static final MethodHandle MH_mapStep; - - static final MethodType MT_sum = methodType(int.class, Integer[].class); - static final MethodType MT_reverse = methodType(List.class, List.class); - static final MethodType MT_length = methodType(int.class, List.class); - static final MethodType MT_map = methodType(List.class, List.class); - static final MethodType MT_print = methodType(void.class, List.class); - - static { - try { - MH_sumIterator = LOOKUP.findStatic(ITERATE, "sumIterator", MT_sumIterator); - MH_sumInit = LOOKUP.findStatic(ITERATE, "sumInit", MT_sumInit); - MH_sumStep = LOOKUP.findStatic(ITERATE, "sumStep", MT_sumStep); - MH_reverseInit = LOOKUP.findStatic(ITERATE, "reverseInit", MT_reverseInit); - MH_reverseStep = LOOKUP.findStatic(ITERATE, "reverseStep", MT_reverseStep); - MH_lengthInit = LOOKUP.findStatic(ITERATE, "lengthInit", MT_lenghInit); - MH_lengthStep = LOOKUP.findStatic(ITERATE, "lengthStep", MT_lengthStep); - MH_mapInit = LOOKUP.findStatic(ITERATE, "mapInit", MT_mapInit); - MH_mapStep = LOOKUP.findStatic(ITERATE, "mapStep", MT_mapStep); - MH_printStep = LOOKUP.findStatic(ITERATE, "printStep", MT_printStep); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class TryFinally { - - static String greet(String whom) { - return "Hello, " + whom; - } - - static String exclaim(Throwable t, String r, String whom) { - return r + "!"; - } - - static void print(String what) { - System.out.print("Hello, " + what); - } - - static void printMore(Throwable t, String what) { - System.out.println("!"); - } - - static String greetMore(String first, String second) { - return "Hello, " + first + " and " + second; - } - - static String exclaimMore(Throwable t, String r, String first) { - return r + " (but " + first + " first)!"; - } - - static void voidTarget() {} - - static void voidCleanup(Throwable t, int a) {} - - static final Class TRY_FINALLY = TryFinally.class; - - static final MethodType MT_greet = methodType(String.class, String.class); - static final MethodType MT_exclaim = methodType(String.class, Throwable.class, String.class, String.class); - static final MethodType MT_print = methodType(void.class, String.class); - static final MethodType MT_printMore = methodType(void.class, Throwable.class, String.class); - static final MethodType MT_greetMore = methodType(String.class, String.class, String.class); - static final MethodType MT_exclaimMore = methodType(String.class, Throwable.class, String.class, String.class); - static final MethodType MT_voidTarget = methodType(void.class); - static final MethodType MT_voidCleanup = methodType(void.class, Throwable.class, int.class); - - static final MethodHandle MH_greet; - static final MethodHandle MH_exclaim; - static final MethodHandle MH_print; - static final MethodHandle MH_printMore; - static final MethodHandle MH_greetMore; - static final MethodHandle MH_exclaimMore; - static final MethodHandle MH_voidTarget; - static final MethodHandle MH_voidCleanup; - - static final MethodType MT_hello = methodType(String.class, String.class); - static final MethodType MT_printHello = methodType(void.class, String.class); - static final MethodType MT_moreHello = methodType(String.class, String.class, String.class); - - static { - try { - MH_greet = LOOKUP.findStatic(TRY_FINALLY, "greet", MT_greet); - MH_exclaim = LOOKUP.findStatic(TRY_FINALLY, "exclaim", MT_exclaim); - MH_print = LOOKUP.findStatic(TRY_FINALLY, "print", MT_print); - MH_printMore = LOOKUP.findStatic(TRY_FINALLY, "printMore", MT_printMore); - MH_greetMore = LOOKUP.findStatic(TRY_FINALLY, "greetMore", MT_greetMore); - MH_exclaimMore = LOOKUP.findStatic(TRY_FINALLY, "exclaimMore", MT_exclaimMore); - MH_voidTarget = LOOKUP.findStatic(TRY_FINALLY, "voidTarget", MT_voidTarget); - MH_voidCleanup = LOOKUP.findStatic(TRY_FINALLY, "voidCleanup", MT_voidCleanup); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class Fold { - - static int adder(int a, int b, int c) { - return a + b + c; - } - - static int adder1(int a, int b) { - return a + b; - } - - static int multer(int x, int q, int r, int s) { - return x * q * r * s; - } - - static int str(boolean b1, String s, boolean b2, int x) { - return b1 && s.equals(String.valueOf(b2)) ? x : -x; - } - - static boolean comb(String s, boolean b2) { - return !s.equals(b2); - } - - static String comb2(boolean b2, int x) { - int ib = b2 ? 1 : 0; - return ib == x ? "true" : "false"; - } - - static final Class FOLD = Fold.class; - - static final MethodType MT_adder = methodType(int.class, int.class, int.class, int.class); - static final MethodType MT_adder1 = methodType(int.class, int.class, int.class); - static final MethodType MT_multer = methodType(int.class, int.class, int.class, int.class, int.class); - static final MethodType MT_str = methodType(int.class, boolean.class, String.class, boolean.class, int.class); - static final MethodType MT_comb = methodType(boolean.class, String.class, boolean.class); - static final MethodType MT_comb2 = methodType(String.class, boolean.class, int.class); - - static final MethodHandle MH_adder; - static final MethodHandle MH_adder1; - static final MethodHandle MH_multer; - static final MethodHandle MH_str; - static final MethodHandle MH_comb; - static final MethodHandle MH_comb2; - - static final MethodType MT_folded1 = methodType(int.class, int.class, int.class, int.class); - static final MethodType MT_folded2 = methodType(int.class, String.class, boolean.class, int.class); - static final MethodType MT_folded3 = methodType(int.class, boolean.class, boolean.class, int.class); - - static { - try { - MH_adder = LOOKUP.findStatic(FOLD, "adder", MT_adder); - MH_adder1 = LOOKUP.findStatic(FOLD, "adder1", MT_adder1); - MH_multer = LOOKUP.findStatic(FOLD, "multer", MT_multer); - MH_str = LOOKUP.findStatic(FOLD, "str", MT_str); - MH_comb = LOOKUP.findStatic(FOLD, "comb", MT_comb); - MH_comb2 = LOOKUP.findStatic(FOLD, "comb2", MT_comb2); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - } - - static class SpreadCollect { - - static String forSpreading(String s1, int i1, int i2, int i3, String s2) { - return s1 + i1 + i2 + i3 + s2; - } - - static String forCollecting(String s1, int[] is, String s2) { - StringBuilder sb = new StringBuilder(s1); - for (int i : is) { - sb.append(i); - } - return sb.append(s2).toString(); - } - - static String forCollectingLeading(int[] is, String s) { - return forCollecting("", is, s); - } - - static final Class SPREAD_COLLECT = SpreadCollect.class; - - static final MethodType MT_forSpreading = methodType(String.class, String.class, int.class, int.class, int.class, String.class); - static final MethodType MT_forCollecting = methodType(String.class, String.class, int[].class, String.class); - static final MethodType MT_forCollectingLeading = methodType(String.class, int[].class, String.class); - - static final MethodHandle MH_forSpreading; - static final MethodHandle MH_forCollecting; - static final MethodHandle MH_forCollectingLeading; - - static final MethodType MT_spreader = methodType(String.class, String.class, int[].class, String.class); - static final MethodType MT_collector0 = methodType(String.class, String.class, String.class); - static final MethodType MT_collector1 = methodType(String.class, String.class, int.class, String.class); - static final MethodType MT_collector2 = methodType(String.class, String.class, int.class, int.class, String.class); - static final MethodType MT_collector3 = methodType(String.class, String.class, int.class, int.class, int.class, String.class); - static final MethodType MT_collectorLeading1 = methodType(String.class, int.class, String.class); - static final MethodType MT_collectorLeading2 = methodType(String.class, int.class, int.class, String.class); - static final MethodType MT_collectorLeading3 = methodType(String.class, int.class, int.class, int.class, String.class); - - static final String NONE_ERROR = "zero array length in MethodHandle.asCollector"; - - static { - try { - MH_forSpreading = LOOKUP.findStatic(SPREAD_COLLECT, "forSpreading", MT_forSpreading); - MH_forCollecting = LOOKUP.findStatic(SPREAD_COLLECT, "forCollecting", MT_forCollecting); - MH_forCollectingLeading = LOOKUP.findStatic(SPREAD_COLLECT, "forCollectingLeading", MT_forCollectingLeading); - } catch (Exception e) { - throw new ExceptionInInitializerError(e); - } - } - - } - - static class FindSpecial { - - interface I1 { - default String m() { - return "I1.m"; - } - } - - interface I2 { - default String m() { - return "I2.m"; - } - } - - interface I3 { - String q(); - } - - static class C implements I1, I2, I3 { - public String m() { - return I1.super.m(); - } - public String q() { - return "q"; - } - } - - static final String ABSTRACT_ERROR = "no such method: test.java.lang.invoke.T8139885$FindSpecial$I3.q()String/invokeSpecial"; - - } - - // - // Auxiliary methods. - // - - static MethodHandle[] mha(MethodHandle... mhs) { - return mhs; - } - -}