| /* |
| * 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. |
| * |
| * 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 |
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| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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| */ |
| |
| /** |
| * @test |
| * @bug 8003280 |
| * @summary Add lambda tests |
| * Test bridge methods in certain SAM conversion |
| * @compile BridgeMethod.java |
| * @run main BridgeMethod |
| */ |
| |
| import java.lang.reflect.Method; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class BridgeMethod { |
| |
| interface H {Object m();} |
| |
| interface K<T> {void m(T t);} |
| |
| 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 cond) { |
| if (!cond) |
| throw new AssertionError(); |
| } |
| |
| static void bar(String s) { |
| System.out.println("BridgeMethod.bar(String) " + s); |
| } |
| |
| String moo() { |
| return "moo"; |
| } |
| |
| private static Set<String> setOfStringObject() { |
| Set<String> s = new HashSet<>(); |
| s.add("java.lang.String"); |
| s.add("java.lang.Object"); |
| return s; |
| } |
| |
| public static void main(String[] args) { |
| L la = BridgeMethod::bar; //static reference |
| la.m("hi"); |
| Class<? extends L> c1 = la.getClass(); |
| Method[] methods = c1.getDeclaredMethods(); |
| Set<String> types = setOfStringObject(); |
| System.out.println("methods in SAM conversion of L:"); |
| for(Method m : methods) { |
| System.out.println(m.toGenericString()); |
| assertTrue(m.getName().equals("m")); |
| 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"))); |
| |
| KM km = BridgeMethod::bar; |
| //km.m("hi"); //will be uncommented when CR7028808 fixed |
| Class<? extends KM> c2 = km.getClass(); |
| methods = c2.getDeclaredMethods(); |
| types = setOfStringObject(); |
| System.out.println("methods in SAM conversion of KM:"); |
| for(Method m : methods) { |
| System.out.println(m.toGenericString()); |
| assertTrue(m.getName().equals("m")); |
| Class<?>[] parameterTypes = m.getParameterTypes(); |
| assertTrue(parameterTypes.length == 1); |
| assertTrue(types.remove(parameterTypes[0].getName())); |
| } |
| assertTrue(types.isEmpty()); |
| |
| N n = new BridgeMethod()::moo; //instance reference |
| assertTrue( n.m().equals("moo") ); |
| assertTrue( ((H)n).m().equals("moo") ); |
| Class<? extends N> c3 = n.getClass(); |
| methods = c3.getDeclaredMethods(); |
| types = setOfStringObject(); |
| System.out.println("methods in SAM conversion of N:"); |
| for(Method m : methods) { |
| System.out.println(m.toGenericString()); |
| if (m.getName().equals("m")) { |
| Class<?> returnType = m.getReturnType(); |
| assertTrue(types.remove(returnType.getName())); |
| } |
| } |
| assertTrue(types.size() == 1); //there's a bridge |
| } |
| } |