| /* |
| * Copyright (c) 2011, 2013, 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. |
| * |
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| * 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 |
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| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
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| */ |
| |
| /** |
| * @test |
| * @bug 8003280 |
| * @summary Add lambda tests |
| * Test bridge methods for certain SAM conversions |
| * Tests that jdk.internal.lambda.disableEagerInitialization=true creates a |
| * get$Lambda method for non-capturing lambdas |
| * @compile LambdaTest6.java |
| * @run main LambdaTest6 |
| * @run main/othervm -Djdk.internal.lambda.disableEagerInitialization=true LambdaTest6 |
| */ |
| |
| import java.lang.reflect.Method; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class LambdaTest6<T> { |
| |
| interface H {Object m();} |
| |
| interface K<U> {void m(U element);} |
| |
| interface L extends K<String> {} //generic substitution |
| |
| interface M {void m(String s);} |
| |
| interface KM extends K<String>, M{} //generic substitution |
| |
| interface N extends H {String m();} //covariant return |
| |
| private static void assertTrue(boolean b) { |
| if(!b) |
| throw new AssertionError(); |
| } |
| |
| private Set<String> setOfStringObject() { |
| Set<String> s = new HashSet<>(); |
| s.add("java.lang.String"); |
| s.add("java.lang.Object"); |
| return s; |
| } |
| |
| private static Set<String> allowedMethods() { |
| Set<String> s = new HashSet<>(); |
| s.add("m"); |
| if (Boolean.getBoolean("jdk.internal.lambda.disableEagerInitialization")) { |
| s.add("get$Lambda"); |
| } |
| return s; |
| } |
| |
| private static boolean matchingMethodNames(Method[] methods) { |
| Set<String> methodNames = new HashSet<>(); |
| for (Method m : methods) { |
| methodNames.add(m.getName()); |
| } |
| return methodNames.equals(allowedMethods()); |
| } |
| |
| private void test1() |
| { |
| L la = s -> { }; |
| la.m("hi"); |
| Class<? extends L> c1 = la.getClass(); |
| Method[] methods = c1.getDeclaredMethods(); |
| assertTrue(matchingMethodNames(methods)); |
| Set<String> types = setOfStringObject(); |
| for(Method m : methods) { |
| if ("m".equals(m.getName())) { |
| Class[] parameterTypes = m.getParameterTypes(); |
| assertTrue(parameterTypes.length == 1); |
| assertTrue(types.remove(parameterTypes[0].getName())); |
| } |
| } |
| assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String"))); |
| } |
| |
| private void test2() |
| { |
| KM km = s -> { }; |
| //km.m("hi"); |
| Class<? extends KM> c2 = km.getClass(); |
| Method[] methods = c2.getDeclaredMethods(); |
| assertTrue(matchingMethodNames(methods)); |
| Set<String> types = setOfStringObject(); |
| for(Method m : methods) { |
| if ("m".equals(m.getName())) { |
| Class[] parameterTypes = m.getParameterTypes(); |
| assertTrue(parameterTypes.length == 1); |
| assertTrue(types.remove(parameterTypes[0].getName())); |
| } |
| } |
| assertTrue(types.isEmpty()); |
| } |
| |
| private void test3() |
| { |
| N na = ()-> "hi"; |
| assertTrue( na.m().equals("hi") ); |
| assertTrue( ((H)na).m().equals("hi") ); |
| Class<? extends N> c3 = na.getClass(); |
| Method[] methods = c3.getDeclaredMethods(); |
| assertTrue(matchingMethodNames(methods)); |
| Set<String> types = setOfStringObject(); |
| for(Method m : methods) { |
| if ("m".equals(m.getName())) { |
| Class returnType = m.getReturnType(); |
| assertTrue(types.remove(returnType.getName())); |
| } |
| } |
| assertTrue(types.size() == 1); //there's a bridge |
| } |
| |
| |
| public static void main(String[] args) { |
| LambdaTest6 test = new LambdaTest6(); |
| test.test1(); |
| test.test2(); |
| test.test3(); |
| } |
| } |