1 /* 2 * Copyright (c) 2011, 2013, 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 8003280 27 * @summary Add lambda tests 28 * Test bridge methods in certain SAM conversion 29 * @compile BridgeMethod.java 30 * @run main BridgeMethod 31 */ 32 33 import java.lang.reflect.Method; 34 import java.util.HashSet; 35 import java.util.Set; 36 37 public class BridgeMethod { 38 m()39 interface H {Object m();} 40 m(T t)41 interface K<T> {void m(T t);} 42 43 interface L extends K<String> {} //generic substitution 44 m(String s)45 interface M {void m(String s);} 46 47 interface KM extends K<String>, M{} //generic substitution 48 m()49 interface N extends H {String m();} //covariant return 50 assertTrue(boolean cond)51 private static void assertTrue(boolean cond) { 52 if (!cond) 53 throw new AssertionError(); 54 } 55 bar(String s)56 static void bar(String s) { 57 System.out.println("BridgeMethod.bar(String) " + s); 58 } 59 moo()60 String moo() { 61 return "moo"; 62 } 63 setOfStringObject()64 private static Set<String> setOfStringObject() { 65 Set<String> s = new HashSet<>(); 66 s.add("java.lang.String"); 67 s.add("java.lang.Object"); 68 return s; 69 } 70 main(String[] args)71 public static void main(String[] args) { 72 L la = BridgeMethod::bar; //static reference 73 la.m("hi"); 74 Class<? extends L> c1 = la.getClass(); 75 Method[] methods = c1.getDeclaredMethods(); 76 Set<String> types = setOfStringObject(); 77 System.out.println("methods in SAM conversion of L:"); 78 for(Method m : methods) { 79 System.out.println(m.toGenericString()); 80 assertTrue(m.getName().equals("m")); 81 Class[] parameterTypes = m.getParameterTypes(); 82 assertTrue(parameterTypes.length == 1); 83 assertTrue(types.remove(parameterTypes[0].getName())); 84 } 85 assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String"))); 86 87 KM km = BridgeMethod::bar; 88 //km.m("hi"); //will be uncommented when CR7028808 fixed 89 Class<? extends KM> c2 = km.getClass(); 90 methods = c2.getDeclaredMethods(); 91 types = setOfStringObject(); 92 System.out.println("methods in SAM conversion of KM:"); 93 for(Method m : methods) { 94 System.out.println(m.toGenericString()); 95 assertTrue(m.getName().equals("m")); 96 Class<?>[] parameterTypes = m.getParameterTypes(); 97 assertTrue(parameterTypes.length == 1); 98 assertTrue(types.remove(parameterTypes[0].getName())); 99 } 100 assertTrue(types.isEmpty()); 101 102 N n = new BridgeMethod()::moo; //instance reference 103 assertTrue( n.m().equals("moo") ); 104 assertTrue( ((H)n).m().equals("moo") ); 105 Class<? extends N> c3 = n.getClass(); 106 methods = c3.getDeclaredMethods(); 107 types = setOfStringObject(); 108 System.out.println("methods in SAM conversion of N:"); 109 for(Method m : methods) { 110 System.out.println(m.toGenericString()); 111 if (m.getName().equals("m")) { 112 Class<?> returnType = m.getReturnType(); 113 assertTrue(types.remove(returnType.getName())); 114 } 115 } 116 assertTrue(types.size() == 1); //there's a bridge 117 } 118 } 119