3789983e89
Reviewed-by: darcy, ihse
170 lines
7.7 KiB
Java
170 lines
7.7 KiB
Java
/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8035776
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* @summary metafactory should fail if arities are mismatched
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*/
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import java.lang.invoke.*;
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import java.util.Arrays;
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import static java.lang.invoke.MethodType.methodType;
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public class MetafactoryArityTest {
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public interface I {}
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public static class C { public static String m(int arg) { return ""; } }
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static final MethodHandles.Lookup lookup = MethodHandles.lookup();
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static final Class<?>[] capInt = { int.class };
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static final MethodHandle C_m;
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static {
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try { C_m = lookup.findStatic(C.class, "m", methodType(String.class, int.class)); }
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catch (NoSuchMethodException | IllegalAccessException e) { throw new RuntimeException(e); }
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}
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public static void main(String... args) {
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MethodType unary = methodType(String.class, int.class);
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MethodType nullary = methodType(String.class);
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MethodType binary = methodType(String.class, int.class, int.class);
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MethodType unaryCS = methodType(CharSequence.class, int.class);
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MethodType nullaryCS = methodType(CharSequence.class);
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MethodType binaryCS = methodType(CharSequence.class, int.class, int.class);
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MethodType unaryObj = methodType(Object.class, int.class);
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MethodType nullaryObj = methodType(Object.class);
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MethodType binaryObj = methodType(Object.class, int.class, int.class);
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test(true, C_m, unary, unary);
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test(false, C_m, unary, nullary);
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test(false, C_m, nullary, unary);
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test(false, C_m, unary, binary);
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test(false, C_m, binary, unary);
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testBridge(true, C_m, unary, unary, unaryCS);
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testBridge(false, C_m, unary, unary, nullaryCS);
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testBridge(false, C_m, unary, unary, binaryCS);
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testBridge(true, C_m, unary, unary, unaryCS, unaryObj);
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testBridge(false, C_m, unary, unary, unaryCS, nullaryObj);
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testBridge(false, C_m, unary, unary, unaryCS, binaryObj);
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testCapture(true, C_m, capInt, nullary, nullary);
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testCapture(false, C_m, capInt, binary, binary);
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testCapture(false, C_m, capInt, nullary, unary);
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testCapture(false, C_m, capInt, nullary, binary);
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testCapture(false, C_m, capInt, unary, nullary);
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testCapture(false, C_m, capInt, unary, binary);
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testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS);
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testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS);
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testCaptureBridge(false, C_m, capInt, nullary, nullary, unaryCS);
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testCaptureBridge(false, C_m, capInt, nullary, nullary, binaryCS);
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testCaptureBridge(true, C_m, capInt, nullary, nullary, nullaryCS, nullaryObj);
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testCaptureBridge(false, C_m, capInt, unary, unary, unaryCS, unaryObj);
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testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, unaryObj);
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testCaptureBridge(false, C_m, capInt, nullary, nullary, nullaryCS, binaryObj);
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}
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static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
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tryMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT);
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tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT);
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}
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static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
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tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT, bridgeMTs);
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}
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static void testCapture(boolean correct, MethodHandle mh, Class<?>[] captured, MethodType instMT, MethodType samMT) {
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tryMetafactory(correct, mh, captured, instMT, samMT);
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tryAltMetafactory(correct, mh, captured, instMT, samMT);
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}
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static void testCaptureBridge(boolean correct, MethodHandle mh, Class<?>[] captured,
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MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
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tryAltMetafactory(correct, mh, captured, instMT, samMT, bridgeMTs);
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}
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static void tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured,
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MethodType instMT, MethodType samMT) {
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try {
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LambdaMetafactory.metafactory(lookup, "run", methodType(I.class, captured),
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samMT, mh, instMT);
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if (!correct) {
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throw new AssertionError("Uncaught linkage error:" +
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" impl=" + mh +
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", captured=" + Arrays.toString(captured) +
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", inst=" + instMT +
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", sam=" + samMT);
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}
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}
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catch (LambdaConversionException e) {
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if (correct) {
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throw new AssertionError("Unexpected linkage error:" +
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" e=" + e +
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", impl=" + mh +
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", captured=" + Arrays.toString(captured) +
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", inst=" + instMT +
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", sam=" + samMT);
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}
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}
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}
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static void tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured,
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MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
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boolean bridge = bridgeMTs.length > 0;
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Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4];
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args[0] = samMT;
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args[1] = mh;
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args[2] = instMT;
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args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0;
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if (bridge) {
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args[4] = bridgeMTs.length;
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for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i];
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}
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try {
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LambdaMetafactory.altMetafactory(lookup, "run", methodType(I.class, captured), args);
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if (!correct) {
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throw new AssertionError("Uncaught linkage error:" +
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" impl=" + mh +
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", captured=" + Arrays.toString(captured) +
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", inst=" + instMT +
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", sam=" + samMT +
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", bridges=" + Arrays.toString(bridgeMTs));
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}
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}
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catch (LambdaConversionException e) {
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if (correct) {
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throw new AssertionError("Unexpected linkage error:" +
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" e=" + e +
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", impl=" + mh +
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", captured=" + Arrays.toString(captured) +
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", inst=" + instMT +
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", sam=" + samMT +
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", bridges=" + Arrays.toString(bridgeMTs));
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}
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}
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}
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}
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