mcimadamore@1415: /*
mcimadamore@1415:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
mcimadamore@1415:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@1415:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@1415:  * published by the Free Software Foundation.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@1415:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@1415:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@1415:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@1415:  * accompanied this code).
mcimadamore@1415:  *
mcimadamore@1415:  * You should have received a copy of the GNU General Public License version
mcimadamore@1415:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@1415:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@1415:  *
mcimadamore@1415:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@1415:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@1415:  * questions.
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: /**
mcimadamore@1415:  * @test
mcimadamore@1415:  * @bug 8003280
mcimadamore@1415:  * @summary Add lambda tests
mcimadamore@1415:  *   Test bridge methods in certain SAM conversion
mcimadamore@1415:  * @compile BridgeMethod.java
mcimadamore@1415:  * @run main BridgeMethod
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: import java.lang.reflect.Method;
mcimadamore@1415: import java.util.HashSet;
mcimadamore@1415: import java.util.Set;
mcimadamore@1415: 
mcimadamore@1415: public class BridgeMethod {
mcimadamore@1415: 
mcimadamore@1415:     interface H {Object m();}
mcimadamore@1415: 
mcimadamore@1415:     interface K<T> {void m(T t);}
mcimadamore@1415: 
mcimadamore@1415:     interface L extends K<String> {} //generic substitution
mcimadamore@1415: 
mcimadamore@1415:     interface M {void m(String s);}
mcimadamore@1415: 
mcimadamore@1415:     interface KM extends K<String>, M{} //generic substitution
mcimadamore@1415: 
mcimadamore@1415:     interface N extends H {String m();} //covariant return
mcimadamore@1415: 
mcimadamore@1415:     private static void assertTrue(boolean cond) {
mcimadamore@1415:         if (!cond)
mcimadamore@1415:             throw new AssertionError();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     static void bar(String s) {
mcimadamore@1415:         System.out.println("BridgeMethod.bar(String) " + s);
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     String moo() {
mcimadamore@1415:         return "moo";
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     private static Set<String> setOfStringObject() {
mcimadamore@1415:         Set<String> s = new HashSet<>();
mcimadamore@1415:         s.add("java.lang.String");
mcimadamore@1415:         s.add("java.lang.Object");
mcimadamore@1415:         return s;
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static void main(String[] args) {
mcimadamore@1415:         L la = BridgeMethod::bar; //static reference
mcimadamore@1415:         la.m("hi");
mcimadamore@1415:         Class<? extends L> c1 = la.getClass();
mcimadamore@1415:         Method[] methods = c1.getDeclaredMethods();
mcimadamore@1415:         Set<String> types = setOfStringObject();
mcimadamore@1415:         System.out.println("methods in SAM conversion of L:");
mcimadamore@1415:         for(Method m : methods) {
mcimadamore@1415:             System.out.println(m.toGenericString());
mcimadamore@1415:             assertTrue(m.getName().equals("m"));
mcimadamore@1415:             Class[] parameterTypes = m.getParameterTypes();
mcimadamore@1415:             assertTrue(parameterTypes.length == 1);
mcimadamore@1415:             assertTrue(types.remove(parameterTypes[0].getName()));
mcimadamore@1415:         }
mcimadamore@1415:         assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String")));
mcimadamore@1415: 
mcimadamore@1415:         KM km = BridgeMethod::bar;
mcimadamore@1415:         //km.m("hi"); //will be uncommented when CR7028808 fixed
mcimadamore@1415:         Class<? extends KM> c2 = km.getClass();
mcimadamore@1415:         methods = c2.getDeclaredMethods();
mcimadamore@1415:         types = setOfStringObject();
mcimadamore@1415:         System.out.println("methods in SAM conversion of KM:");
mcimadamore@1415:         for(Method m : methods) {
mcimadamore@1415:             System.out.println(m.toGenericString());
mcimadamore@1415:             assertTrue(m.getName().equals("m"));
mcimadamore@1415:             Class<?>[] parameterTypes = m.getParameterTypes();
mcimadamore@1415:             assertTrue(parameterTypes.length == 1);
mcimadamore@1415:             assertTrue(types.remove(parameterTypes[0].getName()));
mcimadamore@1415:         }
mcimadamore@1415:         assertTrue(types.isEmpty());
mcimadamore@1415: 
mcimadamore@1415:         N n = new BridgeMethod()::moo; //instance reference
mcimadamore@1415:         assertTrue( n.m().equals("moo") );
mcimadamore@1415:         assertTrue( ((H)n).m().equals("moo") );
mcimadamore@1415:         Class<? extends N> c3 = n.getClass();
mcimadamore@1415:         methods = c3.getDeclaredMethods();
mcimadamore@1415:         types = setOfStringObject();
mcimadamore@1415:         System.out.println("methods in SAM conversion of N:");
mcimadamore@1415:         for(Method m : methods) {
mcimadamore@1415:             System.out.println(m.toGenericString());
mcimadamore@1415:             assertTrue(m.getName().equals("m"));
mcimadamore@1415:             Class<?> returnType = m.getReturnType();
mcimadamore@1415:             assertTrue(types.remove(returnType.getName()));
mcimadamore@1415:         }
mcimadamore@1415:         assertTrue(types.isEmpty());
mcimadamore@1415:     }
mcimadamore@1415: }