| /* |
| * Copyright (c) 2014, 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. |
| * |
| * 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 8035776 |
| * @summary metafactory should fail if arities are mismatched |
| */ |
| import java.lang.invoke.*; |
| import java.util.Arrays; |
| import static java.lang.invoke.MethodType.methodType; |
| |
| public class MetafactoryArityTest { |
| |
| public interface I {} |
| public static class C { public static String m(int arg) { return ""; } } |
| |
| static final MethodHandles.Lookup lookup = MethodHandles.lookup(); |
| static final Class<?>[] capInt = { int.class }; |
| static final MethodHandle C_m; |
| static { |
| try { C_m = lookup.findStatic(C.class, "m", methodType(String.class, int.class)); } |
| catch (NoSuchMethodException | IllegalAccessException e) { throw new RuntimeException(e); } |
| } |
| |
| public static void main(String... args) { |
| MethodType unary = methodType(String.class, int.class); |
| MethodType nullary = methodType(String.class); |
| MethodType binary = methodType(String.class, int.class, int.class); |
| MethodType unaryCS = methodType(CharSequence.class, int.class); |
| MethodType nullaryCS = methodType(CharSequence.class); |
| MethodType binaryCS = methodType(CharSequence.class, int.class, int.class); |
| MethodType unaryObj = methodType(Object.class, int.class); |
| MethodType nullaryObj = methodType(Object.class); |
| MethodType binaryObj = methodType(Object.class, int.class, int.class); |
| |
| test(true, C_m, unary, unary); |
| test(false, C_m, unary, nullary); |
| test(false, C_m, nullary, unary); |
| test(false, C_m, unary, binary); |
| test(false, C_m, binary, unary); |
| |
| testBridge(true, C_m, unary, unary, unaryCS); |
| testBridge(false, C_m, unary, unary, nullaryCS); |
| testBridge(false, C_m, unary, unary, binaryCS); |
| |
| testBridge(true, C_m, unary, unary, unaryCS, unaryObj); |
| testBridge(false, C_m, unary, unary, unaryCS, nullaryObj); |
| testBridge(false, C_m, unary, unary, unaryCS, binaryObj); |
| |
| testCapture(true, C_m, capInt, nullary, nullary); |
| testCapture(false, C_m, capInt, binary, binary); |
| testCapture(false, C_m, capInt, nullary, unary); |
| testCapture(false, C_m, capInt, nullary, binary); |
| testCapture(false, C_m, capInt, unary, nullary); |
| testCapture(false, C_m, capInt, unary, binary); |
| |
| testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS); |
| testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS); |
| testCaptureBridge(false, C_m, capInt, nullary, nullary, unaryCS); |
| testCaptureBridge(false, C_m, capInt, nullary, nullary, binaryCS); |
| |
| testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS, nullaryObj); |
| testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS, unaryObj); |
| testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, unaryObj); |
| testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, binaryObj); |
| } |
| |
| static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) { |
| tryMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); |
| tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT); |
| } |
| |
| static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { |
| tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT, bridgeMTs); |
| } |
| |
| static void testCapture(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT) { |
| tryMetafactory(correct, mh, captured, instMT, samMT); |
| tryAltMetafactory(correct, mh, captured, instMT, samMT); |
| } |
| |
| static void testCaptureBridge(boolean correct, MethodHandle mh, Class<?>[] captured, |
| MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { |
| tryAltMetafactory(correct, mh, captured, instMT, samMT, bridgeMTs); |
| } |
| |
| static void tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, |
| MethodType instMT, MethodType samMT) { |
| try { |
| LambdaMetafactory.metafactory(lookup, "run", methodType(I.class, captured), |
| samMT, mh, instMT); |
| if (!correct) { |
| throw new AssertionError("Uncaught linkage error:" + |
| " impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT); |
| } |
| } |
| catch (LambdaConversionException e) { |
| if (correct) { |
| throw new AssertionError("Unexpected linkage error:" + |
| " e=" + e + |
| ", impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT); |
| } |
| } |
| } |
| |
| static void tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured, |
| MethodType instMT, MethodType samMT, MethodType... bridgeMTs) { |
| boolean bridge = bridgeMTs.length > 0; |
| Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4]; |
| args[0] = samMT; |
| args[1] = mh; |
| args[2] = instMT; |
| args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0; |
| if (bridge) { |
| args[4] = bridgeMTs.length; |
| for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i]; |
| } |
| try { |
| LambdaMetafactory.altMetafactory(lookup, "run", methodType(I.class, captured), args); |
| if (!correct) { |
| throw new AssertionError("Uncaught linkage error:" + |
| " impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT + |
| ", bridges=" + Arrays.toString(bridgeMTs)); |
| } |
| } |
| catch (LambdaConversionException e) { |
| if (correct) { |
| throw new AssertionError("Unexpected linkage error:" + |
| " e=" + e + |
| ", impl=" + mh + |
| ", captured=" + Arrays.toString(captured) + |
| ", inst=" + instMT + |
| ", sam=" + samMT + |
| ", bridges=" + Arrays.toString(bridgeMTs)); |
| } |
| } |
| } |
| |
| } |