140 lines
4.3 KiB
Java
140 lines
4.3 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 for certain SAM conversions
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* Test the set of generated methods
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* @compile LambdaTest6.java
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* @run main LambdaTest6
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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 LambdaTest6<T> {
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interface H {Object m();}
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interface K<U> {void m(U element);}
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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 b) {
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if(!b)
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throw new AssertionError();
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}
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private 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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private static Set<String> allowedMethods() {
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Set<String> s = new HashSet<>();
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s.add("m");
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return s;
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}
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private static boolean matchingMethodNames(Method[] methods) {
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Set<String> methodNames = new HashSet<>();
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for (Method m : methods) {
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methodNames.add(m.getName());
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}
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return methodNames.equals(allowedMethods());
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}
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private void test1()
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{
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L la = s -> { };
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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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assertTrue(matchingMethodNames(methods));
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Set<String> types = setOfStringObject();
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for(Method m : methods) {
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if ("m".equals(m.getName())) {
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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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}
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assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String")));
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}
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private void test2()
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{
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KM km = s -> { };
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//km.m("hi");
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Class<? extends KM> c2 = km.getClass();
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Method[] methods = c2.getDeclaredMethods();
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assertTrue(matchingMethodNames(methods));
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Set<String> types = setOfStringObject();
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for(Method m : methods) {
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if ("m".equals(m.getName())) {
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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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}
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assertTrue(types.isEmpty());
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}
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private void test3()
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{
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N na = ()-> "hi";
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assertTrue( na.m().equals("hi") );
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assertTrue( ((H)na).m().equals("hi") );
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Class<? extends N> c3 = na.getClass();
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Method[] methods = c3.getDeclaredMethods();
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assertTrue(matchingMethodNames(methods));
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Set<String> types = setOfStringObject();
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for(Method m : methods) {
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if ("m".equals(m.getName())) {
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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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public static void main(String[] args) {
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LambdaTest6 test = new LambdaTest6();
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test.test1();
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test.test2();
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test.test3();
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}
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}
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