1 /* 2 * Copyright (c) 2014, 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 /* 25 * @test 26 * @bug 8035776 27 * @summary metafactory should fail if arities are mismatched 28 */ 29 import java.lang.invoke.*; 30 import java.util.Arrays; 31 import static java.lang.invoke.MethodType.methodType; 32 33 public class MetafactoryArityTest { 34 35 public interface I {} m(int arg)36 public static class C { public static String m(int arg) { return ""; } } 37 38 static final MethodHandles.Lookup lookup = MethodHandles.lookup(); 39 static final Class<?>[] capInt = { int.class }; 40 static final MethodHandle C_m; 41 static { 42 try { C_m = lookup.findStatic(C.class, "m", methodType(String.class, int.class)); } 43 catch (NoSuchMethodException | IllegalAccessException e) { throw new RuntimeException(e); } 44 } 45 main(String... args)46 public static void main(String... args) { 47 MethodType unary = methodType(String.class, int.class); 48 MethodType nullary = methodType(String.class); 49 MethodType binary = methodType(String.class, int.class, int.class); 50 MethodType unaryCS = methodType(CharSequence.class, int.class); 51 MethodType nullaryCS = methodType(CharSequence.class); 52 MethodType binaryCS = methodType(CharSequence.class, int.class, int.class); 53 MethodType unaryObj = methodType(Object.class, int.class); 54 MethodType nullaryObj = methodType(Object.class); 55 MethodType binaryObj = methodType(Object.class, int.class, int.class); 56 57 test(true, C_m, unary, unary); 58 test(false, C_m, unary, nullary); 59 test(false, C_m, nullary, unary); 60 test(false, C_m, unary, binary); 61 test(false, C_m, binary, unary); 62 63 testBridge(true, C_m, unary, unary, unaryCS); 64 testBridge(false, C_m, unary, unary, nullaryCS); 65 testBridge(false, C_m, unary, unary, binaryCS); 66 67 testBridge(true, C_m, unary, unary, unaryCS, unaryObj); 68 testBridge(false, C_m, unary, unary, unaryCS, nullaryObj); 69 testBridge(false, C_m, unary, unary, unaryCS, binaryObj); 70 71 testCapture(true, C_m, capInt, nullary, nullary); 72 testCapture(false, C_m, capInt, binary, binary); 73 testCapture(false, C_m, capInt, nullary, unary); 74 testCapture(false, C_m, capInt, nullary, binary); 75 testCapture(false, C_m, capInt, unary, nullary); 76 testCapture(false, C_m, capInt, unary, binary); 77 78 testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS); 79 testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS); 80 testCaptureBridge(false, C_m, capInt, nullary, nullary, unaryCS); 81 testCaptureBridge(false, C_m, capInt, nullary, nullary, binaryCS); 82 83 testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS, nullaryObj); 84 testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS, unaryObj); 85 testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, unaryObj); 86 testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, binaryObj); 87 } 88 test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT)89 static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) { 90 tryMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); 91 tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); 92 } 93 testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs)94 static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { 95 tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT, bridgeMTs); 96 } 97 testCapture(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT)98 static void testCapture(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT) { 99 tryMetafactory(correct, mh, captured, instMT, samMT); 100 tryAltMetafactory(correct, mh, captured, instMT, samMT); 101 } 102 testCaptureBridge(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT, MethodType... bridgeMTs)103 static void testCaptureBridge(boolean correct, MethodHandle mh, Class<?>[] captured, 104 MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { 105 tryAltMetafactory(correct, mh, captured, instMT, samMT, bridgeMTs); 106 } 107 tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT)108 static void tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, 109 MethodType instMT, MethodType samMT) { 110 try { 111 LambdaMetafactory.metafactory(lookup, "run", methodType(I.class, captured), 112 samMT, mh, instMT); 113 if (!correct) { 114 throw new AssertionError("Uncaught linkage error:" + 115 " impl=" + mh + 116 ", captured=" + Arrays.toString(captured) + 117 ", inst=" + instMT + 118 ", sam=" + samMT); 119 } 120 } 121 catch (LambdaConversionException e) { 122 if (correct) { 123 throw new AssertionError("Unexpected linkage error:" + 124 " e=" + e + 125 ", impl=" + mh + 126 ", captured=" + Arrays.toString(captured) + 127 ", inst=" + instMT + 128 ", sam=" + samMT); 129 } 130 } 131 } 132 tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT, MethodType... bridgeMTs)133 static void tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, 134 MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { 135 boolean bridge = bridgeMTs.length > 0; 136 Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4]; 137 args[0] = samMT; 138 args[1] = mh; 139 args[2] = instMT; 140 args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0; 141 if (bridge) { 142 args[4] = bridgeMTs.length; 143 for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i]; 144 } 145 try { 146 LambdaMetafactory.altMetafactory(lookup, "run", methodType(I.class, captured), args); 147 if (!correct) { 148 throw new AssertionError("Uncaught linkage error:" + 149 " impl=" + mh + 150 ", captured=" + Arrays.toString(captured) + 151 ", inst=" + instMT + 152 ", sam=" + samMT + 153 ", bridges=" + Arrays.toString(bridgeMTs)); 154 } 155 } 156 catch (LambdaConversionException e) { 157 if (correct) { 158 throw new AssertionError("Unexpected linkage error:" + 159 " e=" + e + 160 ", impl=" + mh + 161 ", captured=" + Arrays.toString(captured) + 162 ", inst=" + instMT + 163 ", sam=" + samMT + 164 ", bridges=" + Arrays.toString(bridgeMTs)); 165 } 166 } 167 } 168 169 } 170