1 /*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /* @test
27 * @bug 8139885
28 * @bug 8143798
29 * @bug 8150825
30 * @bug 8150635
31 * @run testng/othervm -ea -esa test.java.lang.invoke.T8139885
32 */
33
34 package test.java.lang.invoke;
35
36 import java.io.StringWriter;
37 import java.lang.invoke.MethodHandle;
38 import java.lang.invoke.MethodHandles;
39 import java.lang.invoke.MethodHandles.Lookup;
40 import java.lang.invoke.MethodType;
41 import java.lang.invoke.WrongMethodTypeException;
42 import java.util.*;
43
44 import static java.lang.invoke.MethodType.methodType;
45
46 import static org.testng.AssertJUnit.*;
47
48 import org.testng.annotations.*;
49
50 /**
51 * Example-scale and negative tests for JEP 274 extensions.
52 */
53 public class T8139885 {
54
55 static final Lookup LOOKUP = MethodHandles.lookup();
56
57 //
58 // Tests.
59 //
60
61 @Test
62 public static void testLoopFac() throws Throwable {
63 MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc};
64 MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
65 MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause);
66 assertEquals(Fac.MT_fac, loop.type());
67 assertEquals(120, loop.invoke(5));
68 }
69
70 @Test
71 public static void testLoopFacNullInit() throws Throwable {
72 // null initializer for counter, should initialize to 0
73 MethodHandle[] counterClause = new MethodHandle[]{null, Fac.MH_inc};
74 MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
75 MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause);
76 assertEquals(Fac.MT_fac, loop.type());
77 assertEquals(120, loop.invoke(5));
78 }
79
80 @Test
81 public static void testLoopNullInit() throws Throwable {
82 // null initializer for counter, should initialize to 0, one-clause loop
83 MethodHandle[] counterClause = new MethodHandle[]{null, Loop.MH_inc, Loop.MH_pred, Loop.MH_fin};
84 MethodHandle loop = MethodHandles.loop(counterClause);
85 assertEquals(Loop.MT_loop, loop.type());
86 assertEquals(10, loop.invoke(10));
87 }
88
89 @Test
90 public static void testLoopVoid1() throws Throwable {
91 // construct a post-checked loop that only does one iteration and has a void body and void local state
92 MethodHandle loop = MethodHandles.loop(new MethodHandle[]{Empty.MH_f, Empty.MH_f, Empty.MH_pred, null});
93 assertEquals(MethodType.methodType(void.class), loop.type());
94 loop.invoke();
95 }
96
97 @Test
98 public static void testLoopVoid2() throws Throwable {
99 // construct a post-checked loop that only does one iteration and has a void body and void local state,
100 // initialized implicitly from the step type
101 MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, null});
102 assertEquals(MethodType.methodType(void.class), loop.type());
103 loop.invoke();
104 }
105
106 @Test
107 public static void testLoopVoid3() throws Throwable {
108 // construct a post-checked loop that only does one iteration and has a void body and void local state,
109 // and that has a void finalizer
110 MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_f});
111 assertEquals(MethodType.methodType(void.class), loop.type());
112 loop.invoke();
113 }
114
115 @Test
116 public static void testLoopFacWithVoidState() throws Throwable {
117 // like testLoopFac, but with additional void state that outputs a dot
118 MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc};
119 MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
120 MethodHandle[] dotClause = new MethodHandle[]{null, Fac.MH_dot};
121 MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause, dotClause);
122 assertEquals(Fac.MT_fac, loop.type());
123 assertEquals(120, loop.invoke(5));
124 }
125
126 @Test
127 public static void testLoopVoidInt() throws Throwable {
128 // construct a post-checked loop that only does one iteration and has a void body and void local state,
129 // and that returns a constant
130 MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, Empty.MH_c});
131 assertEquals(MethodType.methodType(int.class), loop.type());
132 assertEquals(23, loop.invoke());
133 }
134
135 @Test
136 public static void testLoopWithVirtuals() throws Throwable {
137 // construct a loop (to calculate factorial) that uses a mix of static and virtual methods
138 MethodHandle[] counterClause = new MethodHandle[]{null, LoopWithVirtuals.permute(LoopWithVirtuals.MH_inc)};
139 MethodHandle[] accumulatorClause = new MethodHandle[]{
140 // init function must indicate the loop arguments (there is no other means to determine them)
141 MethodHandles.dropArguments(LoopWithVirtuals.MH_one, 0, LoopWithVirtuals.class),
142 LoopWithVirtuals.permute(LoopWithVirtuals.MH_mult),
143 LoopWithVirtuals.permute(LoopWithVirtuals.MH_pred),
144 LoopWithVirtuals.permute(LoopWithVirtuals.MH_fin)
145 };
146 MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause);
147 assertEquals(LoopWithVirtuals.MT_loop, loop.type());
148 assertEquals(120, loop.invoke(new LoopWithVirtuals(), 5));
149 }
150
151 @Test
152 public static void testLoopNegative() throws Throwable {
153 MethodHandle mh_loop =
154 LOOKUP.findStatic(MethodHandles.class, "loop", methodType(MethodHandle.class, MethodHandle[][].class));
155 MethodHandle i0 = MethodHandles.constant(int.class, 0);
156 MethodHandle ii = MethodHandles.dropArguments(i0, 0, int.class, int.class);
157 MethodHandle id = MethodHandles.dropArguments(i0, 0, int.class, double.class);
158 MethodHandle i3 = MethodHandles.dropArguments(i0, 0, int.class, int.class, int.class);
159 List<MethodHandle> inits = Arrays.asList(ii, id, i3);
160 List<Class<?>> ints = Arrays.asList(int.class, int.class, int.class);
161 List<MethodHandle> finis = Arrays.asList(Fac.MH_fin, Fac.MH_inc, Counted.MH_step);
162 List<MethodHandle> preds1 = Arrays.asList(null, null, null);
163 List<MethodHandle> preds2 = Arrays.asList(null, Fac.MH_fin, null);
164 MethodHandle eek = MethodHandles.dropArguments(i0, 0, int.class, int.class, double.class);
165 List<MethodHandle> nesteps = Arrays.asList(Fac.MH_inc, eek, Fac.MH_dot);
166 List<MethodHandle> nepreds = Arrays.asList(null, Fac.MH_pred, null);
167 List<MethodHandle> nefinis = Arrays.asList(null, Fac.MH_fin, null);
168 List<MethodHandle> lvsteps = Arrays.asList(LoopWithVirtuals.MH_inc, LoopWithVirtuals.MH_mult);
169 List<MethodHandle> lvpreds = Arrays.asList(null, LoopWithVirtuals.MH_pred);
170 List<MethodHandle> lvfinis = Arrays.asList(null, LoopWithVirtuals.MH_fin);
171 MethodHandle[][][] cases = {
172 /* 1 */ null,
173 /* 2 */ {},
174 /* 3 */ {{null, Fac.MH_inc}, {Fac.MH_one, null, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}},
175 /* 4 */ {{null, Fac.MH_inc}, null},
176 /* 5 */ {{Fac.MH_zero, Fac.MH_dot}},
177 /* 6 */ {{ii}, {id}, {i3}},
178 /* 7 */ {{null, Fac.MH_inc, null, Fac.MH_fin}, {null, Fac.MH_inc, null, Fac.MH_inc},
179 {null, Counted.MH_start, null, Counted.MH_step}},
180 /* 8 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, null, Fac.MH_fin}, {null, Fac.MH_dot}},
181 /* 9 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, Fac.MH_fin, Fac.MH_fin}, {null, Fac.MH_dot}},
182 /* 10 */ {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, eek, Fac.MH_pred, Fac.MH_fin}, {null, Fac.MH_dot}},
183 /* 11 */ {{null, LoopWithVirtuals.MH_inc}, {LoopWithVirtuals.MH_one, LoopWithVirtuals.MH_mult, LoopWithVirtuals.MH_pred, LoopWithVirtuals.MH_fin}}
184 };
185 String[] messages = {
186 /* 1 */ "null or no clauses passed",
187 /* 2 */ "null or no clauses passed",
188 /* 3 */ "All loop clauses must be represented as MethodHandle arrays with at most 4 elements.",
189 /* 4 */ "null clauses are not allowed",
190 /* 5 */ "clause 0: init and step return types must match: int != void",
191 /* 6 */ "found non-effectively identical init parameter type lists: " + inits +
192 " (common suffix: " + ints + ")",
193 /* 7 */ "found non-identical finalizer return types: " + finis + " (return type: int)",
194 /* 8 */ "no predicate found: " + preds1,
195 /* 9 */ "predicates must have boolean return type: " + preds2,
196 /* 10 */ "found non-effectively identical parameter type lists:\nstep: " + nesteps +
197 "\npred: " + nepreds + "\nfini: " + nefinis + " (common parameter sequence: " + ints + ")",
198 /* 11 */ "found non-effectively identical parameter type lists:\nstep: " + lvsteps +
199 "\npred: " + lvpreds + "\nfini: " + lvfinis + " (common parameter sequence: " + ints + ")"
200 };
201 for (int i = 0; i < cases.length; ++i) {
202 boolean caught = false;
203 try {
204 mh_loop.invokeWithArguments(cases[i]);
205 } catch (IllegalArgumentException iae) {
206 assertEquals(messages[i], iae.getMessage());
207 caught = true;
208 }
209 assertTrue(caught);
210 }
211 }
212
213 @Test
214 public static void testWhileLoop() throws Throwable {
215 // int i = 0; while (i < limit) { ++i; } return i; => limit
216 MethodHandle loop = MethodHandles.whileLoop(While.MH_zero, While.MH_pred, While.MH_step);
217 assertEquals(While.MT_while, loop.type());
218 assertEquals(23, loop.invoke(23));
219 }
220
221 @Test
222 public static void testWhileLoopNoIteration() throws Throwable {
223 // a while loop that never executes its body because the predicate evaluates to false immediately
224 MethodHandle loop = MethodHandles.whileLoop(While.MH_initString, While.MH_predString, While.MH_stepString);
225 assertEquals(While.MT_string, loop.type());
226 assertEquals("a", loop.invoke());
227 }
228
229 @Test
230 public static void testDoWhileLoop() throws Throwable {
231 // int i = 0; do { ++i; } while (i < limit); return i; => limit
232 MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zero, While.MH_step, While.MH_pred);
233 assertEquals(While.MT_while, loop.type());
234 assertEquals(23, loop.invoke(23));
235 }
236
237 @Test
238 public static void testWhileZip() throws Throwable {
239 MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zipInitZip, While.MH_zipStep, While.MH_zipPred);
240 assertEquals(While.MT_zip, loop.type());
241 List<String> a = Arrays.asList("a", "b", "c", "d");
242 List<String> b = Arrays.asList("e", "f", "g", "h");
243 List<String> zipped = Arrays.asList("a", "e", "b", "f", "c", "g", "d", "h");
244 assertEquals(zipped, (List<String>) loop.invoke(a.iterator(), b.iterator()));
245 }
246
247 @Test
248 public static void testCountedLoop() throws Throwable {
249 // String s = "Lambdaman!"; for (int i = 0; i < 13; ++i) { s = "na " + s; } return s; => a variation on a well known theme
250 MethodHandle fit13 = MethodHandles.constant(int.class, 13);
251 MethodHandle loop = MethodHandles.countedLoop(fit13, Counted.MH_start, Counted.MH_step);
252 assertEquals(Counted.MT_counted, loop.type());
253 assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!"));
254 }
255
256 @Test
257 public static void testCountedArrayLoop() throws Throwable {
258 // int[] a = new int[]{0}; for (int i = 0; i < 13; ++i) { ++a[0]; } => a[0] == 13
259 MethodHandle fit13 = MethodHandles.dropArguments(MethodHandles.constant(int.class, 13), 0, int[].class);
260 MethodHandle loop = MethodHandles.countedLoop(fit13, null, Counted.MH_stepUpdateArray);
261 assertEquals(Counted.MT_arrayCounted, loop.type());
262 int[] a = new int[]{0};
263 loop.invoke(a);
264 assertEquals(13, a[0]);
265 }
266
267 @Test
268 public static void testCountedPrintingLoop() throws Throwable {
269 MethodHandle fit5 = MethodHandles.constant(int.class, 5);
270 MethodHandle loop = MethodHandles.countedLoop(fit5, null, Counted.MH_printHello);
271 assertEquals(Counted.MT_countedPrinting, loop.type());
272 loop.invoke();
273 }
274
275 @Test
276 public static void testCountedRangeLoop() throws Throwable {
277 // String s = "Lambdaman!"; for (int i = -5; i < 8; ++i) { s = "na " + s; } return s; => a well known theme
278 MethodHandle fitm5 = MethodHandles.dropArguments(Counted.MH_m5, 0, String.class);
279 MethodHandle fit8 = MethodHandles.dropArguments(Counted.MH_8, 0, String.class);
280 MethodHandle loop = MethodHandles.countedLoop(fitm5, fit8, Counted.MH_start, Counted.MH_step);
281 assertEquals(Counted.MT_counted, loop.type());
282 assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!"));
283 }
284
285 @Test
286 public static void testIterateSum() throws Throwable {
287 // Integer[] a = new Integer[]{1,2,3,4,5,6}; int sum = 0; for (int e : a) { sum += e; } return sum; => 21
288 MethodHandle loop = MethodHandles.iteratedLoop(Iterate.MH_sumIterator, Iterate.MH_sumInit, Iterate.MH_sumStep);
289 assertEquals(Iterate.MT_sum, loop.type());
290 assertEquals(21, loop.invoke(new Integer[]{1, 2, 3, 4, 5, 6}));
291 }
292
293 @Test
294 public static void testIterateReverse() throws Throwable {
295 MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_reverseInit, Iterate.MH_reverseStep);
296 assertEquals(Iterate.MT_reverse, loop.type());
297 List<String> list = Arrays.asList("a", "b", "c", "d", "e");
298 List<String> reversedList = Arrays.asList("e", "d", "c", "b", "a");
299 assertEquals(reversedList, (List<String>) loop.invoke(list));
300 }
301
302 @Test
303 public static void testIterateLength() throws Throwable {
304 MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_lengthInit, Iterate.MH_lengthStep);
305 assertEquals(Iterate.MT_length, loop.type());
306 List<Double> list = Arrays.asList(23.0, 148.0, 42.0);
307 assertEquals(list.size(), (int) loop.invoke(list));
308 }
309
310 @Test
311 public static void testIterateMap() throws Throwable {
312 MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_mapInit, Iterate.MH_mapStep);
313 assertEquals(Iterate.MT_map, loop.type());
314 List<String> list = Arrays.asList("Hello", "world", "!");
315 List<String> upList = Arrays.asList("HELLO", "WORLD", "!");
316 assertEquals(upList, (List<String>) loop.invoke(list));
317 }
318
319 @Test
320 public static void testIteratePrint() throws Throwable {
321 MethodHandle loop = MethodHandles.iteratedLoop(null, null, Iterate.MH_printStep);
322 assertEquals(Iterate.MT_print, loop.type());
323 loop.invoke(Arrays.asList("hello", "world"));
324 }
325
326 @Test
327 public static void testIterateNullBody() {
328 boolean caught = false;
329 try {
330 MethodHandles.iteratedLoop(MethodHandles.identity(int.class), MethodHandles.identity(int.class), null);
331 } catch (IllegalArgumentException iae) {
332 assertEquals("iterated loop body must not be null", iae.getMessage());
333 caught = true;
334 }
335 assertTrue(caught);
336 }
337
338 @Test
339 public static void testTryFinally() throws Throwable {
340 MethodHandle hello = MethodHandles.tryFinally(TryFinally.MH_greet, TryFinally.MH_exclaim);
341 assertEquals(TryFinally.MT_hello, hello.type());
342 assertEquals("Hello, world!", hello.invoke("world"));
343 }
344
345 @Test
346 public static void testTryFinallyVoid() throws Throwable {
347 MethodHandle tfVoid = MethodHandles.tryFinally(TryFinally.MH_print, TryFinally.MH_printMore);
348 assertEquals(TryFinally.MT_printHello, tfVoid.type());
349 tfVoid.invoke("world");
350 }
351
352 @Test
353 public static void testTryFinallySublist() throws Throwable {
354 MethodHandle helloMore = MethodHandles.tryFinally(TryFinally.MH_greetMore, TryFinally.MH_exclaimMore);
355 assertEquals(TryFinally.MT_moreHello, helloMore.type());
356 assertEquals("Hello, world and universe (but world first)!", helloMore.invoke("world", "universe"));
357 }
358
359 @Test
360 public static void testTryFinallyNegative() {
361 MethodHandle intid = MethodHandles.identity(int.class);
362 MethodHandle intco = MethodHandles.constant(int.class, 0);
363 MethodHandle errTarget = MethodHandles.dropArguments(intco, 0, int.class, double.class, String.class, int.class);
364 MethodHandle errCleanup = MethodHandles.dropArguments(MethodHandles.constant(int.class, 0), 0, Throwable.class,
365 int.class, double.class, Object.class);
366 MethodHandle[][] cases = {
367 {intid, MethodHandles.identity(double.class)},
368 {intid, MethodHandles.dropArguments(intid, 0, String.class)},
369 {intid, MethodHandles.dropArguments(intid, 0, Throwable.class, double.class)},
370 {errTarget, errCleanup},
371 {TryFinally.MH_voidTarget, TryFinally.MH_voidCleanup}
372 };
373 String[] messages = {
374 "target and return types must match: double != int",
375 "cleanup first argument and Throwable must match: (String,int)int != class java.lang.Throwable",
376 "cleanup second argument and target return type must match: (Throwable,double,int)int != int",
377 "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " +
378 errCleanup.type() + " != " + errTarget.type(),
379 "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " +
380 TryFinally.MH_voidCleanup.type() + " != " + TryFinally.MH_voidTarget.type()
381 };
382 for (int i = 0; i < cases.length; ++i) {
383 boolean caught = false;
384 try {
385 MethodHandles.tryFinally(cases[i][0], cases[i][1]);
386 } catch (IllegalArgumentException iae) {
387 assertEquals(messages[i], iae.getMessage());
388 caught = true;
389 }
390 assertTrue(caught);
391 }
392 }
393
394 @Test
395 public static void testFold0a() throws Throwable {
396 // equivalence to foldArguments(MethodHandle,MethodHandle)
397 MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 0, Fold.MH_adder);
398 assertEquals(Fold.MT_folded1, fold.type());
399 assertEquals(720, (int) fold.invoke(3, 4, 5));
400 }
401
402 @Test
403 public static void testFold1a() throws Throwable {
404 // test foldArguments for folding position 1
405 MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 1, Fold.MH_adder1);
406 assertEquals(Fold.MT_folded1, fold.type());
407 assertEquals(540, (int) fold.invoke(3, 4, 5));
408 }
409
410 @Test
411 public static void testFold0b() throws Throwable {
412 // test foldArguments equivalence with multiple types
413 MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 0, Fold.MH_comb);
414 assertEquals(Fold.MT_folded2, fold.type());
415 assertEquals(23, (int) fold.invoke("true", true, 23));
416 }
417
418 @Test
419 public static void testFold1b() throws Throwable {
420 // test folgArguments for folding position 1, with multiple types
421 MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 1, Fold.MH_comb2);
422 assertEquals(Fold.MT_folded3, fold.type());
423 assertEquals(1, (int) fold.invoke(true, true, 1));
424 assertEquals(-1, (int) fold.invoke(true, false, -1));
425 }
426
427 @Test
428 public static void testFoldArgumentsExample() throws Throwable {
429 // test the JavaDoc foldArguments-with-pos example
430 StringWriter swr = new StringWriter();
431 MethodHandle trace = LOOKUP.findVirtual(StringWriter.class, "write", methodType(void.class, String.class)).bindTo(swr);
432 MethodHandle cat = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class));
433 assertEquals("boojum", (String) cat.invokeExact("boo", "jum"));
434 MethodHandle catTrace = MethodHandles.foldArguments(cat, 1, trace);
435 assertEquals("boojum", (String) catTrace.invokeExact("boo", "jum"));
436 assertEquals("jum", swr.toString());
437 }
438
439 @Test
440 public static void testAsSpreader() throws Throwable {
441 MethodHandle spreader = SpreadCollect.MH_forSpreading.asSpreader(1, int[].class, 3);
442 assertEquals(SpreadCollect.MT_spreader, spreader.type());
443 assertEquals("A456B", (String) spreader.invoke("A", new int[]{4, 5, 6}, "B"));
444 }
445
446 @Test
447 public static void testAsSpreaderExample() throws Throwable {
448 // test the JavaDoc asSpreader-with-pos example
449 MethodHandle compare = LOOKUP.findStatic(Objects.class, "compare", methodType(int.class, Object.class, Object.class, Comparator.class));
450 MethodHandle compare2FromArray = compare.asSpreader(0, Object[].class, 2);
451 Object[] ints = new Object[]{3, 9, 7, 7};
452 Comparator<Integer> cmp = (a, b) -> a - b;
453 assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 0, 2), cmp) < 0);
454 assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 1, 3), cmp) > 0);
455 assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 2, 4), cmp) == 0);
456 }
457
458 @Test
459 public static void testAsSpreaderIllegalPos() throws Throwable {
460 int[] illegalPos = {-7, 3, 19};
461 int caught = 0;
462 for (int p : illegalPos) {
463 try {
464 SpreadCollect.MH_forSpreading.asSpreader(p, Object[].class, 3);
465 } catch (IllegalArgumentException iae) {
466 assertEquals("bad spread position", iae.getMessage());
467 ++caught;
468 }
469 }
470 assertEquals(illegalPos.length, caught);
471 }
472
473 @Test
474 public static void testAsSpreaderIllegalMethodType() throws Throwable {
475 MethodHandle h = MethodHandles.dropArguments(MethodHandles.constant(String.class, ""), 0, int.class, int.class);
476 boolean caught = false;
477 try {
478 MethodHandle s = h.asSpreader(String[].class, 1);
479 } catch (WrongMethodTypeException wmte) {
480 caught = true;
481 }
482 assertTrue(caught);
483 }
484
485 @Test
486 public static void testAsCollector() throws Throwable {
487 MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1);
488 assertEquals(SpreadCollect.MT_collector1, collector.type());
489 assertEquals("A4B", (String) collector.invoke("A", 4, "B"));
490 collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2);
491 assertEquals(SpreadCollect.MT_collector2, collector.type());
492 assertEquals("A45B", (String) collector.invoke("A", 4, 5, "B"));
493 collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3);
494 assertEquals(SpreadCollect.MT_collector3, collector.type());
495 assertEquals("A456B", (String) collector.invoke("A", 4, 5, 6, "B"));
496 }
497
498 @Test
499 public static void testAsCollectorInvokeWithArguments() throws Throwable {
500 MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1);
501 assertEquals(SpreadCollect.MT_collector1, collector.type());
502 assertEquals("A4B", (String) collector.invokeWithArguments("A", 4, "B"));
503 collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2);
504 assertEquals(SpreadCollect.MT_collector2, collector.type());
505 assertEquals("A45B", (String) collector.invokeWithArguments("A", 4, 5, "B"));
506 collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3);
507 assertEquals(SpreadCollect.MT_collector3, collector.type());
508 assertEquals("A456B", (String) collector.invokeWithArguments("A", 4, 5, 6, "B"));
509 }
510
511 @Test
512 public static void testAsCollectorLeading() throws Throwable {
513 MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1);
514 assertEquals(SpreadCollect.MT_collectorLeading1, collector.type());
515 assertEquals("7Q", (String) collector.invoke(7, "Q"));
516 collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2);
517 assertEquals(SpreadCollect.MT_collectorLeading2, collector.type());
518 assertEquals("78Q", (String) collector.invoke(7, 8, "Q"));
519 collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3);
520 assertEquals(SpreadCollect.MT_collectorLeading3, collector.type());
521 assertEquals("789Q", (String) collector.invoke(7, 8, 9, "Q"));
522 }
523
524 @Test
525 public static void testAsCollectorLeadingInvokeWithArguments() throws Throwable {
526 MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1);
527 assertEquals(SpreadCollect.MT_collectorLeading1, collector.type());
528 assertEquals("7Q", (String) collector.invokeWithArguments(7, "Q"));
529 collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2);
530 assertEquals(SpreadCollect.MT_collectorLeading2, collector.type());
531 assertEquals("78Q", (String) collector.invokeWithArguments(7, 8, "Q"));
532 collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3);
533 assertEquals(SpreadCollect.MT_collectorLeading3, collector.type());
534 assertEquals("789Q", (String) collector.invokeWithArguments(7, 8, 9, "Q"));
535 }
536
537 @Test
538 public static void testAsCollectorNone() throws Throwable {
539 MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 0);
540 assertEquals(SpreadCollect.MT_collector0, collector.type());
541 assertEquals("AB", (String) collector.invoke("A", "B"));
542 }
543
544 @Test
545 public static void testAsCollectorIllegalPos() throws Throwable {
546 int[] illegalPos = {-1, 17};
547 int caught = 0;
548 for (int p : illegalPos) {
549 try {
550 SpreadCollect.MH_forCollecting.asCollector(p, int[].class, 0);
551 } catch (IllegalArgumentException iae) {
552 assertEquals("bad collect position", iae.getMessage());
553 ++caught;
554 }
555 }
556 assertEquals(illegalPos.length, caught);
557 }
558
559 @Test
560 public static void testAsCollectorExample() throws Throwable {
561 // test the JavaDoc asCollector-with-pos example
562 StringWriter swr = new StringWriter();
563 MethodHandle swWrite = LOOKUP.
564 findVirtual(StringWriter.class, "write", methodType(void.class, char[].class, int.class, int.class)).
565 bindTo(swr);
566 MethodHandle swWrite4 = swWrite.asCollector(0, char[].class, 4);
567 swWrite4.invoke('A', 'B', 'C', 'D', 1, 2);
568 assertEquals("BC", swr.toString());
569 swWrite4.invoke('P', 'Q', 'R', 'S', 0, 4);
570 assertEquals("BCPQRS", swr.toString());
571 swWrite4.invoke('W', 'X', 'Y', 'Z', 3, 1);
572 assertEquals("BCPQRSZ", swr.toString());
573 }
574
575 @Test
576 public static void testFindSpecial() throws Throwable {
577 FindSpecial.C c = new FindSpecial.C();
578 assertEquals("I1.m", c.m());
579 MethodType t = MethodType.methodType(String.class);
580 MethodHandle ci1m = LOOKUP.findSpecial(FindSpecial.I1.class, "m", t, FindSpecial.C.class);
581 assertEquals("I1.m", (String) ci1m.invoke(c));
582 }
583
584 @Test
585 public static void testFindSpecialAbstract() throws Throwable {
586 FindSpecial.C c = new FindSpecial.C();
587 assertEquals("q", c.q());
588 MethodType t = MethodType.methodType(String.class);
589 boolean caught = false;
590 try {
591 MethodHandle ci3q = LOOKUP.findSpecial(FindSpecial.I3.class, "q", t, FindSpecial.C.class);
592 } catch (Throwable thrown) {
593 if (!(thrown instanceof IllegalAccessException) || !FindSpecial.ABSTRACT_ERROR.equals(thrown.getMessage())) {
594 throw new AssertionError(thrown.getMessage(), thrown);
595 }
596 caught = true;
597 }
598 assertTrue(caught);
599 }
600
601 @Test
602 public static void testFindClassCNFE() throws Throwable {
603 boolean caught = false;
604 try {
605 LOOKUP.findClass("does.not.Exist");
606 } catch (ClassNotFoundException cnfe) {
607 caught = true;
608 }
609 assertTrue(caught);
610 }
611
612 //
613 // Methods used to assemble tests.
614 //
615
616 static class Empty {
617
618 static void f() { }
619
620 static boolean pred() {
621 return false;
622 }
623
624 static int c() {
625 return 23;
626 }
627
628 static final Class<Empty> EMPTY = Empty.class;
629
630 static final MethodType MT_f = methodType(void.class);
631 static final MethodType MT_pred = methodType(boolean.class);
632 static final MethodType MT_c = methodType(int.class);
633
634 static final MethodHandle MH_f;
635 static final MethodHandle MH_pred;
636 static final MethodHandle MH_c;
637
638 static {
639 try {
640 MH_f = LOOKUP.findStatic(EMPTY, "f", MT_f);
641 MH_pred = LOOKUP.findStatic(EMPTY, "pred", MT_pred);
642 MH_c = LOOKUP.findStatic(EMPTY, "c", MT_c);
643 } catch (Exception e) {
644 throw new ExceptionInInitializerError(e);
645 }
646 }
647 }
648
649 static class Fac {
650
651 static int zero(int k) {
652 return 0;
653 }
654
655 static int one(int k) {
656 return 1;
657 }
658
659 static boolean pred(int i, int acc, int k) {
660 return i < k;
661 }
662
663 static int inc(int i, int acc, int k) {
664 return i + 1;
665 }
666
667 static int mult(int i, int acc, int k) {
668 return i * acc;
669 }
670
671 static void dot(int i, int acc, int k) {
672 System.out.print('.');
673 }
674
675 static int fin(int i, int acc, int k) {
676 return acc;
677 }
678
679 static final Class<Fac> FAC = Fac.class;
680
681 static final MethodType MT_init = methodType(int.class, int.class);
682 static final MethodType MT_fn = methodType(int.class, int.class, int.class, int.class);
683 static final MethodType MT_dot = methodType(void.class, int.class, int.class, int.class);
684 static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class);
685
686 static final MethodHandle MH_zero;
687 static final MethodHandle MH_one;
688 static final MethodHandle MH_pred;
689 static final MethodHandle MH_inc;
690 static final MethodHandle MH_mult;
691 static final MethodHandle MH_dot;
692 static final MethodHandle MH_fin;
693
694 static final MethodType MT_fac = methodType(int.class, int.class);
695
696 static {
697 try {
698 MH_zero = LOOKUP.findStatic(FAC, "zero", MT_init);
699 MH_one = LOOKUP.findStatic(FAC, "one", MT_init);
700 MH_pred = LOOKUP.findStatic(FAC, "pred", MT_pred);
701 MH_inc = LOOKUP.findStatic(FAC, "inc", MT_fn);
702 MH_mult = LOOKUP.findStatic(FAC, "mult", MT_fn);
703 MH_dot = LOOKUP.findStatic(FAC, "dot", MT_dot);
704 MH_fin = LOOKUP.findStatic(FAC, "fin", MT_fn);
705 } catch (Exception e) {
706 throw new ExceptionInInitializerError(e);
707 }
708 }
709
710 }
711
712 static class Loop {
713
714 static int inc(int i, int k) {
715 return i + 1;
716 }
717
718 static boolean pred(int i, int k) {
719 return i < k;
720 }
721
722 static int fin(int i, int k) {
723 return k;
724 }
725
726 static final Class<Loop> LOOP = Loop.class;
727
728 static final MethodType MT_inc = methodType(int.class, int.class, int.class);
729 static final MethodType MT_pred = methodType(boolean.class, int.class, int.class);
730 static final MethodType MT_fin = methodType(int.class, int.class, int.class);
731
732 static final MethodHandle MH_inc;
733 static final MethodHandle MH_pred;
734 static final MethodHandle MH_fin;
735
736 static final MethodType MT_loop = methodType(int.class, int.class);
737
738 static {
739 try {
740 MH_inc = LOOKUP.findStatic(LOOP, "inc", MT_inc);
741 MH_pred = LOOKUP.findStatic(LOOP, "pred", MT_pred);
742 MH_fin = LOOKUP.findStatic(LOOP, "fin", MT_fin);
743 } catch (Exception e) {
744 throw new ExceptionInInitializerError(e);
745 }
746 }
747
748 }
749
750 static class LoopWithVirtuals {
751
752 static int one(int k) {
753 return 1;
754 }
755
756 int inc(int i, int acc, int k) {
757 return i + 1;
758 }
759
760 int mult(int i, int acc, int k) {
761 return i * acc;
762 }
763
764 boolean pred(int i, int acc, int k) {
765 return i < k;
766 }
767
768 int fin(int i, int acc, int k) {
769 return acc;
770 }
771
772 static final Class<LoopWithVirtuals> LOOP_WITH_VIRTUALS = LoopWithVirtuals.class;
773
774 static final MethodType MT_one = methodType(int.class, int.class);
775 static final MethodType MT_inc = methodType(int.class, int.class, int.class, int.class);
776 static final MethodType MT_mult = methodType(int.class, int.class, int.class, int.class);
777 static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class);
778 static final MethodType MT_fin = methodType(int.class, int.class, int.class, int.class);
779
780 static final MethodHandle MH_one;
781 static final MethodHandle MH_inc;
782 static final MethodHandle MH_mult;
783 static final MethodHandle MH_pred;
784 static final MethodHandle MH_fin;
785
786 static final MethodType MT_loop = methodType(int.class, LOOP_WITH_VIRTUALS, int.class);
787
788 static {
789 try {
790 MH_one = LOOKUP.findStatic(LOOP_WITH_VIRTUALS, "one", MT_one);
791 MH_inc = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "inc", MT_inc);
792 MH_mult = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "mult", MT_mult);
793 MH_pred = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "pred", MT_pred);
794 MH_fin = LOOKUP.findVirtual(LOOP_WITH_VIRTUALS, "fin", MT_fin);
795 } catch (Exception e) {
796 throw new ExceptionInInitializerError(e);
797 }
798 }
799
800 static MethodHandle permute(MethodHandle h) {
801 // The handles representing virtual methods need to be rearranged to match the required order of arguments
802 // (loop-local state comes first, then loop arguments). As the receiver comes first in the signature but is
803 // a loop argument, it must be moved to the appropriate position in the signature.
804 return MethodHandles.permuteArguments(h,
805 methodType(h.type().returnType(), int.class, int.class, LOOP_WITH_VIRTUALS, int.class), 2, 0, 1, 3);
806 }
807
808 }
809
810 static class While {
811
812 static int zero(int limit) {
813 return 0;
814 }
815
816 static boolean pred(int i, int limit) {
817 return i < limit;
818 }
819
820 static int step(int i, int limit) {
821 return i + 1;
822 }
823
824 static String initString() {
825 return "a";
826 }
827
828 static boolean predString(String s) {
829 return s.length() != 1;
830 }
831
832 static String stepString(String s) {
833 return s + "a";
834 }
835
836 static List<String> zipInitZip(Iterator<String> a, Iterator<String> b) {
837 return new ArrayList<>();
838 }
839
840 static boolean zipPred(List<String> zip, Iterator<String> a, Iterator<String> b) {
841 return a.hasNext() && b.hasNext();
842 }
843
844 static List<String> zipStep(List<String> zip, Iterator<String> a, Iterator<String> b) {
845 zip.add(a.next());
846 zip.add(b.next());
847 return zip;
848 }
849
850 static final Class<While> WHILE = While.class;
851
852 static final MethodType MT_zero = methodType(int.class, int.class);
853 static final MethodType MT_pred = methodType(boolean.class, int.class, int.class);
854 static final MethodType MT_fn = methodType(int.class, int.class, int.class);
855 static final MethodType MT_initString = methodType(String.class);
856 static final MethodType MT_predString = methodType(boolean.class, String.class);
857 static final MethodType MT_stepString = methodType(String.class, String.class);
858 static final MethodType MT_zipInitZip = methodType(List.class, Iterator.class, Iterator.class);
859 static final MethodType MT_zipPred = methodType(boolean.class, List.class, Iterator.class, Iterator.class);
860 static final MethodType MT_zipStep = methodType(List.class, List.class, Iterator.class, Iterator.class);
861
862 static final MethodHandle MH_zero;
863 static final MethodHandle MH_pred;
864 static final MethodHandle MH_step;
865 static final MethodHandle MH_initString;
866 static final MethodHandle MH_predString;
867 static final MethodHandle MH_stepString;
868 static final MethodHandle MH_zipInitZip;
869 static final MethodHandle MH_zipPred;
870 static final MethodHandle MH_zipStep;
871
872 static final MethodType MT_while = methodType(int.class, int.class);
873 static final MethodType MT_string = methodType(String.class);
874 static final MethodType MT_zip = methodType(List.class, Iterator.class, Iterator.class);
875
876 static {
877 try {
878 MH_zero = LOOKUP.findStatic(WHILE, "zero", MT_zero);
879 MH_pred = LOOKUP.findStatic(WHILE, "pred", MT_pred);
880 MH_step = LOOKUP.findStatic(WHILE, "step", MT_fn);
881 MH_initString = LOOKUP.findStatic(WHILE, "initString", MT_initString);
882 MH_predString = LOOKUP.findStatic(WHILE, "predString", MT_predString);
883 MH_stepString = LOOKUP.findStatic(WHILE, "stepString", MT_stepString);
884 MH_zipInitZip = LOOKUP.findStatic(WHILE, "zipInitZip", MT_zipInitZip);
885 MH_zipPred = LOOKUP.findStatic(WHILE, "zipPred", MT_zipPred);
886 MH_zipStep = LOOKUP.findStatic(WHILE, "zipStep", MT_zipStep);
887 } catch (Exception e) {
888 throw new ExceptionInInitializerError(e);
889 }
890 }
891
892 }
893
894 static class Counted {
895
896 static String start(String arg) {
897 return arg;
898 }
899
900 static String step(int counter, String v, String arg) {
901 return "na " + v;
902 }
903
904 static void stepUpdateArray(int counter, int[] a) {
905 ++a[0];
906 }
907
908 static void printHello(int counter) {
909 System.out.print("hello");
910 }
911
912 static final Class<Counted> COUNTED = Counted.class;
913
914 static final MethodType MT_start = methodType(String.class, String.class);
915 static final MethodType MT_step = methodType(String.class, int.class, String.class, String.class);
916 static final MethodType MT_stepUpdateArray = methodType(void.class, int.class, int[].class);
917 static final MethodType MT_printHello = methodType(void.class, int.class);
918
919 static final MethodHandle MH_13;
920 static final MethodHandle MH_m5;
921 static final MethodHandle MH_8;
922 static final MethodHandle MH_start;
923 static final MethodHandle MH_step;
924 static final MethodHandle MH_stepUpdateArray;
925 static final MethodHandle MH_printHello;
926
927 static final MethodType MT_counted = methodType(String.class, String.class);
928 static final MethodType MT_arrayCounted = methodType(void.class, int[].class);
929 static final MethodType MT_countedPrinting = methodType(void.class);
930
931 static {
932 try {
933 MH_13 = MethodHandles.constant(int.class, 13);
934 MH_m5 = MethodHandles.constant(int.class, -5);
935 MH_8 = MethodHandles.constant(int.class, 8);
936 MH_start = LOOKUP.findStatic(COUNTED, "start", MT_start);
937 MH_step = LOOKUP.findStatic(COUNTED, "step", MT_step);
938 MH_stepUpdateArray = LOOKUP.findStatic(COUNTED, "stepUpdateArray", MT_stepUpdateArray);
939 MH_printHello = LOOKUP.findStatic(COUNTED, "printHello", MT_printHello);
940 } catch (Exception e) {
941 throw new ExceptionInInitializerError(e);
942 }
943 }
944
945 }
946
947 static class Iterate {
948
949 static Iterator<Integer> sumIterator(Integer[] a) {
950 return Arrays.asList(a).iterator();
951 }
952
953 static int sumInit(Integer[] a) {
954 return 0;
955 }
956
957 static int sumStep(int s, int e, Integer[] a) {
958 return s + e;
959 }
960
961 static List<String> reverseInit(List<String> l) {
962 return new ArrayList<>();
963 }
964
965 static List<String> reverseStep(String e, List<String> r, List<String> l) {
966 r.add(0, e);
967 return r;
968 }
969
970 static int lengthInit(List<Double> l) {
971 return 0;
972 }
973
974 static int lengthStep(Object o, int len, List<Double> l) {
975 return len + 1;
976 }
977
978 static List<String> mapInit(List<String> l) {
979 return new ArrayList<>();
980 }
981
982 static List<String> mapStep(String e, List<String> r, List<String> l) {
983 r.add(e.toUpperCase());
984 return r;
985 }
986
987 static void printStep(String s, List<String> l) {
988 System.out.print(s);
989 }
990
991 static final Class<Iterate> ITERATE = Iterate.class;
992
993 static final MethodType MT_sumIterator = methodType(Iterator.class, Integer[].class);
994
995 static final MethodType MT_sumInit = methodType(int.class, Integer[].class);
996 static final MethodType MT_reverseInit = methodType(List.class, List.class);
997 static final MethodType MT_lenghInit = methodType(int.class, List.class);
998 static final MethodType MT_mapInit = methodType(List.class, List.class);
999
1000 static final MethodType MT_sumStep = methodType(int.class, int.class, int.class, Integer[].class);
1001 static final MethodType MT_reverseStep = methodType(List.class, String.class, List.class, List.class);
1002 static final MethodType MT_lengthStep = methodType(int.class, Object.class, int.class, List.class);
1003 static final MethodType MT_mapStep = methodType(List.class, String.class, List.class, List.class);
1004 static final MethodType MT_printStep = methodType(void.class, String.class, List.class);
1005
1006 static final MethodHandle MH_sumIterator;
1007 static final MethodHandle MH_sumInit;
1008 static final MethodHandle MH_sumStep;
1009 static final MethodHandle MH_printStep;
1010
1011 static final MethodHandle MH_reverseInit;
1012 static final MethodHandle MH_reverseStep;
1013
1014 static final MethodHandle MH_lengthInit;
1015 static final MethodHandle MH_lengthStep;
1016
1017 static final MethodHandle MH_mapInit;
1018 static final MethodHandle MH_mapStep;
1019
1020 static final MethodType MT_sum = methodType(int.class, Integer[].class);
1021 static final MethodType MT_reverse = methodType(List.class, List.class);
1022 static final MethodType MT_length = methodType(int.class, List.class);
1023 static final MethodType MT_map = methodType(List.class, List.class);
1024 static final MethodType MT_print = methodType(void.class, List.class);
1025
1026 static {
1027 try {
1028 MH_sumIterator = LOOKUP.findStatic(ITERATE, "sumIterator", MT_sumIterator);
1029 MH_sumInit = LOOKUP.findStatic(ITERATE, "sumInit", MT_sumInit);
1030 MH_sumStep = LOOKUP.findStatic(ITERATE, "sumStep", MT_sumStep);
1031 MH_reverseInit = LOOKUP.findStatic(ITERATE, "reverseInit", MT_reverseInit);
1032 MH_reverseStep = LOOKUP.findStatic(ITERATE, "reverseStep", MT_reverseStep);
1033 MH_lengthInit = LOOKUP.findStatic(ITERATE, "lengthInit", MT_lenghInit);
1034 MH_lengthStep = LOOKUP.findStatic(ITERATE, "lengthStep", MT_lengthStep);
1035 MH_mapInit = LOOKUP.findStatic(ITERATE, "mapInit", MT_mapInit);
1036 MH_mapStep = LOOKUP.findStatic(ITERATE, "mapStep", MT_mapStep);
1037 MH_printStep = LOOKUP.findStatic(ITERATE, "printStep", MT_printStep);
1038 } catch (Exception e) {
1039 throw new ExceptionInInitializerError(e);
1040 }
1041 }
1042
1043 }
1044
1045 static class TryFinally {
1046
1047 static String greet(String whom) {
1048 return "Hello, " + whom;
1049 }
1050
1051 static String exclaim(Throwable t, String r, String whom) {
1052 return r + "!";
1053 }
1054
1055 static void print(String what) {
1056 System.out.print("Hello, " + what);
1057 }
1058
1059 static void printMore(Throwable t, String what) {
1060 System.out.println("!");
1061 }
1062
1063 static String greetMore(String first, String second) {
1064 return "Hello, " + first + " and " + second;
1065 }
1066
1067 static String exclaimMore(Throwable t, String r, String first) {
1068 return r + " (but " + first + " first)!";
1069 }
1070
1071 static void voidTarget() {}
1072
1073 static void voidCleanup(Throwable t, int a) {}
1074
1075 static final Class<TryFinally> TRY_FINALLY = TryFinally.class;
1076
1077 static final MethodType MT_greet = methodType(String.class, String.class);
1078 static final MethodType MT_exclaim = methodType(String.class, Throwable.class, String.class, String.class);
1079 static final MethodType MT_print = methodType(void.class, String.class);
1080 static final MethodType MT_printMore = methodType(void.class, Throwable.class, String.class);
1081 static final MethodType MT_greetMore = methodType(String.class, String.class, String.class);
1082 static final MethodType MT_exclaimMore = methodType(String.class, Throwable.class, String.class, String.class);
1083 static final MethodType MT_voidTarget = methodType(void.class);
1084 static final MethodType MT_voidCleanup = methodType(void.class, Throwable.class, int.class);
1085
1086 static final MethodHandle MH_greet;
1087 static final MethodHandle MH_exclaim;
1088 static final MethodHandle MH_print;
1089 static final MethodHandle MH_printMore;
1090 static final MethodHandle MH_greetMore;
1091 static final MethodHandle MH_exclaimMore;
1092 static final MethodHandle MH_voidTarget;
1093 static final MethodHandle MH_voidCleanup;
1094
1095 static final MethodType MT_hello = methodType(String.class, String.class);
1096 static final MethodType MT_printHello = methodType(void.class, String.class);
1097 static final MethodType MT_moreHello = methodType(String.class, String.class, String.class);
1098
1099 static {
1100 try {
1101 MH_greet = LOOKUP.findStatic(TRY_FINALLY, "greet", MT_greet);
1102 MH_exclaim = LOOKUP.findStatic(TRY_FINALLY, "exclaim", MT_exclaim);
1103 MH_print = LOOKUP.findStatic(TRY_FINALLY, "print", MT_print);
1104 MH_printMore = LOOKUP.findStatic(TRY_FINALLY, "printMore", MT_printMore);
1105 MH_greetMore = LOOKUP.findStatic(TRY_FINALLY, "greetMore", MT_greetMore);
1106 MH_exclaimMore = LOOKUP.findStatic(TRY_FINALLY, "exclaimMore", MT_exclaimMore);
1107 MH_voidTarget = LOOKUP.findStatic(TRY_FINALLY, "voidTarget", MT_voidTarget);
1108 MH_voidCleanup = LOOKUP.findStatic(TRY_FINALLY, "voidCleanup", MT_voidCleanup);
1109 } catch (Exception e) {
1110 throw new ExceptionInInitializerError(e);
1111 }
1112 }
1113
1114 }
1115
1116 static class Fold {
1117
1118 static int adder(int a, int b, int c) {
1119 return a + b + c;
1120 }
1121
1122 static int adder1(int a, int b) {
1123 return a + b;
1124 }
1125
1126 static int multer(int x, int q, int r, int s) {
1127 return x * q * r * s;
1128 }
1129
1130 static int str(boolean b1, String s, boolean b2, int x) {
1131 return b1 && s.equals(String.valueOf(b2)) ? x : -x;
1132 }
1133
1134 static boolean comb(String s, boolean b2) {
1135 return !s.equals(b2);
1136 }
1137
1138 static String comb2(boolean b2, int x) {
1139 int ib = b2 ? 1 : 0;
1140 return ib == x ? "true" : "false";
1141 }
1142
1143 static final Class<Fold> FOLD = Fold.class;
1144
1145 static final MethodType MT_adder = methodType(int.class, int.class, int.class, int.class);
1146 static final MethodType MT_adder1 = methodType(int.class, int.class, int.class);
1147 static final MethodType MT_multer = methodType(int.class, int.class, int.class, int.class, int.class);
1148 static final MethodType MT_str = methodType(int.class, boolean.class, String.class, boolean.class, int.class);
1149 static final MethodType MT_comb = methodType(boolean.class, String.class, boolean.class);
1150 static final MethodType MT_comb2 = methodType(String.class, boolean.class, int.class);
1151
1152 static final MethodHandle MH_adder;
1153 static final MethodHandle MH_adder1;
1154 static final MethodHandle MH_multer;
1155 static final MethodHandle MH_str;
1156 static final MethodHandle MH_comb;
1157 static final MethodHandle MH_comb2;
1158
1159 static final MethodType MT_folded1 = methodType(int.class, int.class, int.class, int.class);
1160 static final MethodType MT_folded2 = methodType(int.class, String.class, boolean.class, int.class);
1161 static final MethodType MT_folded3 = methodType(int.class, boolean.class, boolean.class, int.class);
1162
1163 static {
1164 try {
1165 MH_adder = LOOKUP.findStatic(FOLD, "adder", MT_adder);
1166 MH_adder1 = LOOKUP.findStatic(FOLD, "adder1", MT_adder1);
1167 MH_multer = LOOKUP.findStatic(FOLD, "multer", MT_multer);
1168 MH_str = LOOKUP.findStatic(FOLD, "str", MT_str);
1169 MH_comb = LOOKUP.findStatic(FOLD, "comb", MT_comb);
1170 MH_comb2 = LOOKUP.findStatic(FOLD, "comb2", MT_comb2);
1171 } catch (Exception e) {
1172 throw new ExceptionInInitializerError(e);
1173 }
1174 }
1175 }
1176
1177 static class SpreadCollect {
1178
1179 static String forSpreading(String s1, int i1, int i2, int i3, String s2) {
1180 return s1 + i1 + i2 + i3 + s2;
1181 }
1182
1183 static String forCollecting(String s1, int[] is, String s2) {
1184 StringBuilder sb = new StringBuilder(s1);
1185 for (int i : is) {
1186 sb.append(i);
1187 }
1188 return sb.append(s2).toString();
1189 }
1190
1191 static String forCollectingLeading(int[] is, String s) {
1192 return forCollecting("", is, s);
1193 }
1194
1195 static final Class<SpreadCollect> SPREAD_COLLECT = SpreadCollect.class;
1196
1197 static final MethodType MT_forSpreading = methodType(String.class, String.class, int.class, int.class, int.class, String.class);
1198 static final MethodType MT_forCollecting = methodType(String.class, String.class, int[].class, String.class);
1199 static final MethodType MT_forCollectingLeading = methodType(String.class, int[].class, String.class);
1200
1201 static final MethodHandle MH_forSpreading;
1202 static final MethodHandle MH_forCollecting;
1203 static final MethodHandle MH_forCollectingLeading;
1204
1205 static final MethodType MT_spreader = methodType(String.class, String.class, int[].class, String.class);
1206 static final MethodType MT_collector0 = methodType(String.class, String.class, String.class);
1207 static final MethodType MT_collector1 = methodType(String.class, String.class, int.class, String.class);
1208 static final MethodType MT_collector2 = methodType(String.class, String.class, int.class, int.class, String.class);
1209 static final MethodType MT_collector3 = methodType(String.class, String.class, int.class, int.class, int.class, String.class);
1210 static final MethodType MT_collectorLeading1 = methodType(String.class, int.class, String.class);
1211 static final MethodType MT_collectorLeading2 = methodType(String.class, int.class, int.class, String.class);
1212 static final MethodType MT_collectorLeading3 = methodType(String.class, int.class, int.class, int.class, String.class);
1213
1214 static final String NONE_ERROR = "zero array length in MethodHandle.asCollector";
1215
1216 static {
1217 try {
1218 MH_forSpreading = LOOKUP.findStatic(SPREAD_COLLECT, "forSpreading", MT_forSpreading);
1219 MH_forCollecting = LOOKUP.findStatic(SPREAD_COLLECT, "forCollecting", MT_forCollecting);
1220 MH_forCollectingLeading = LOOKUP.findStatic(SPREAD_COLLECT, "forCollectingLeading", MT_forCollectingLeading);
1221 } catch (Exception e) {
1222 throw new ExceptionInInitializerError(e);
1223 }
1224 }
1225
1226 }
1227
1228 static class FindSpecial {
1229
1230 interface I1 {
1231 default String m() {
1232 return "I1.m";
1233 }
1234 }
1235
1236 interface I2 {
1237 default String m() {
1238 return "I2.m";
1239 }
1240 }
1241
1242 interface I3 {
1243 String q();
1244 }
1245
1246 static class C implements I1, I2, I3 {
1247 public String m() {
1248 return I1.super.m();
1249 }
1250 public String q() {
1251 return "q";
1252 }
1253 }
1254
1255 static final String ABSTRACT_ERROR = "no such method: test.java.lang.invoke.T8139885$FindSpecial$I3.q()String/invokeSpecial";
1256
1257 }
1258
1259 //
1260 // Auxiliary methods.
1261 //
1262
1263 static MethodHandle[] mha(MethodHandle... mhs) {
1264 return mhs;
1265 }
1266
1267 }