aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @test
aoqi@0:  * @bug 8003280
aoqi@0:  * @summary Add lambda tests
aoqi@0:  *   Test bridge methods in certain SAM conversion
aoqi@0:  * @compile BridgeMethod.java
aoqi@0:  * @run main BridgeMethod
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.lang.reflect.Method;
aoqi@0: import java.util.HashSet;
aoqi@0: import java.util.Set;
aoqi@0: 
aoqi@0: public class BridgeMethod {
aoqi@0: 
aoqi@0:     interface H {Object m();}
aoqi@0: 
aoqi@0:     interface K<T> {void m(T t);}
aoqi@0: 
aoqi@0:     interface L extends K<String> {} //generic substitution
aoqi@0: 
aoqi@0:     interface M {void m(String s);}
aoqi@0: 
aoqi@0:     interface KM extends K<String>, M{} //generic substitution
aoqi@0: 
aoqi@0:     interface N extends H {String m();} //covariant return
aoqi@0: 
aoqi@0:     private static void assertTrue(boolean cond) {
aoqi@0:         if (!cond)
aoqi@0:             throw new AssertionError();
aoqi@0:     }
aoqi@0: 
aoqi@0:     static void bar(String s) {
aoqi@0:         System.out.println("BridgeMethod.bar(String) " + s);
aoqi@0:     }
aoqi@0: 
aoqi@0:     String moo() {
aoqi@0:         return "moo";
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static Set<String> setOfStringObject() {
aoqi@0:         Set<String> s = new HashSet<>();
aoqi@0:         s.add("java.lang.String");
aoqi@0:         s.add("java.lang.Object");
aoqi@0:         return s;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String[] args) {
aoqi@0:         L la = BridgeMethod::bar; //static reference
aoqi@0:         la.m("hi");
aoqi@0:         Class<? extends L> c1 = la.getClass();
aoqi@0:         Method[] methods = c1.getDeclaredMethods();
aoqi@0:         Set<String> types = setOfStringObject();
aoqi@0:         System.out.println("methods in SAM conversion of L:");
aoqi@0:         for(Method m : methods) {
aoqi@0:             System.out.println(m.toGenericString());
aoqi@0:             assertTrue(m.getName().equals("m"));
aoqi@0:             Class[] parameterTypes = m.getParameterTypes();
aoqi@0:             assertTrue(parameterTypes.length == 1);
aoqi@0:             assertTrue(types.remove(parameterTypes[0].getName()));
aoqi@0:         }
aoqi@0:         assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String")));
aoqi@0: 
aoqi@0:         KM km = BridgeMethod::bar;
aoqi@0:         //km.m("hi"); //will be uncommented when CR7028808 fixed
aoqi@0:         Class<? extends KM> c2 = km.getClass();
aoqi@0:         methods = c2.getDeclaredMethods();
aoqi@0:         types = setOfStringObject();
aoqi@0:         System.out.println("methods in SAM conversion of KM:");
aoqi@0:         for(Method m : methods) {
aoqi@0:             System.out.println(m.toGenericString());
aoqi@0:             assertTrue(m.getName().equals("m"));
aoqi@0:             Class<?>[] parameterTypes = m.getParameterTypes();
aoqi@0:             assertTrue(parameterTypes.length == 1);
aoqi@0:             assertTrue(types.remove(parameterTypes[0].getName()));
aoqi@0:         }
aoqi@0:         assertTrue(types.isEmpty());
aoqi@0: 
aoqi@0:         N n = new BridgeMethod()::moo; //instance reference
aoqi@0:         assertTrue( n.m().equals("moo") );
aoqi@0:         assertTrue( ((H)n).m().equals("moo") );
aoqi@0:         Class<? extends N> c3 = n.getClass();
aoqi@0:         methods = c3.getDeclaredMethods();
aoqi@0:         types = setOfStringObject();
aoqi@0:         System.out.println("methods in SAM conversion of N:");
aoqi@0:         for(Method m : methods) {
aoqi@0:             System.out.println(m.toGenericString());
aoqi@0:             if (m.getName().equals("m")) {
aoqi@0:                 Class<?> returnType = m.getReturnType();
aoqi@0:                 assertTrue(types.remove(returnType.getName()));
aoqi@0:             }
aoqi@0:         }
aoqi@0:         assertTrue(types.size() == 1); //there's a bridge
aoqi@0:     }
aoqi@0: }