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