1 /* 2 * Copyright (c) 2017, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @summary Smoke-test class specializer, used to create BoundMethodHandle classes 26 * @compile/module=java.base java/lang/invoke/ClassSpecializerHelper.java 27 * @run testng/othervm/timeout=250 -ea -esa ClassSpecializerTest 28 */ 29 30 // Useful diagnostics to try: 31 // -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true 32 // -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true 33 34 35 import org.testng.annotations.*; 36 import java.lang.invoke.*; 37 import java.util.ArrayList; 38 import java.util.Arrays; 39 import java.util.List; 40 41 import static java.lang.invoke.ClassSpecializerHelper.*; 42 43 44 public class ClassSpecializerTest { 45 @Test 46 public void testFindSpecies() throws Throwable { 47 System.out.println("testFindSpecies"); 48 System.out.println("test = " + SPEC_TEST); 49 ArrayList<Object> args = new ArrayList<>(); 50 for (int key = 0; key <= Kind.MAX_KEY; key++) { 51 Kind k = SpecTest.kind(key); 52 System.out.println("k = " + k); 53 MethodHandle mh = k.factory(); 54 System.out.println("k.f = " + mh); 55 args.clear(); 56 for (Class<?> pt : mh.type().parameterList()) { 57 args.add(coughUpA(pt)); 58 } 59 args.set(0, key * 1000 + 42); 60 Frob f = (Frob) mh.invokeWithArguments(args.toArray()); 61 assert(f.kind() == k); 62 System.out.println("k.f(...) = " + f.toString()); 63 List<Object> l = f.asList(); 64 System.out.println("f.l = " + l); 65 args.subList(0,1).clear(); // drop label 66 assert(args.equals(l)); 67 } 68 } 69 private static Object coughUpA(Class<?> pt) throws Throwable { 70 if (pt == String.class) return "foo"; 71 if (pt.isArray()) return java.lang.reflect.Array.newInstance(pt.getComponentType(), 2); 72 if (pt == Integer.class) return 42; 73 if (pt == Double.class) return 3.14; 74 if (pt.isAssignableFrom(List.class)) 75 return Arrays.asList("hello", "world", "from", pt.getSimpleName()); 76 return MethodHandles.zero(pt).invoke(); 77 } 78 public static void main(String... av) throws Throwable { 79 System.out.println("TEST: ClassSpecializerTest"); 80 new ClassSpecializerTest().testFindSpecies(); 81 } 82 }