1 /* 2 * Copyright (c) 2016, 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 package test.java.util.Properties; 25 26 import java.lang.reflect.Method; 27 import java.lang.reflect.Modifier; 28 import java.util.*; 29 import java.util.stream.Collectors; 30 import java.util.stream.Stream; 31 32 /* 33 * @test 34 * @bug 8029891 35 * @summary Test that the Properties class overrides all public+protected 36 * methods of all ancestor classes and interfaces 37 * @run main CheckOverrides 38 */ 39 public class CheckOverrides { 40 main(String[] args)41 public static void main(String[] args) { 42 Set<MethodSignature> pMethodSignatures = 43 Stream.of(Properties.class.getDeclaredMethods()) 44 .filter(CheckOverrides::isMethodOfInterest) 45 .map(MethodSignature::new) 46 .collect(Collectors.toSet()); 47 48 Map<MethodSignature, Method> unoverriddenMethods = new HashMap<>(); 49 for (Class<?> superclass = Properties.class.getSuperclass(); 50 superclass != Object.class; 51 superclass = superclass.getSuperclass()) { 52 Stream.of(superclass.getDeclaredMethods()) 53 .filter(CheckOverrides::isMethodOfInterest) 54 .forEach(m -> unoverriddenMethods.putIfAbsent(new MethodSignature(m), m)); 55 } 56 unoverriddenMethods.keySet().removeAll(pMethodSignatures); 57 58 if (!unoverriddenMethods.isEmpty()) { 59 throw new RuntimeException( 60 "The following methods should be overridden by Properties class:\n" + 61 unoverriddenMethods.values().stream() 62 .map(Method::toString) 63 .collect(Collectors.joining("\n ", " ", "\n")) 64 ); 65 } 66 } 67 isMethodOfInterest(Method method)68 static boolean isMethodOfInterest(Method method) { 69 int mods = method.getModifiers(); 70 return !Modifier.isStatic(mods) && 71 (Modifier.isPublic(mods) || Modifier.isProtected(mods)); 72 } 73 74 static class MethodSignature { 75 final Class<?> returnType; 76 final String name; 77 final Class<?>[] parameterTypes; 78 MethodSignature(Method method)79 MethodSignature(Method method) { 80 this(method.getReturnType(), method.getName(), method.getParameterTypes()); 81 } 82 MethodSignature(Class<?> returnType, String name, Class<?>[] parameterTypes)83 private MethodSignature(Class<?> returnType, String name, Class<?>[] parameterTypes) { 84 this.returnType = returnType; 85 this.name = name; 86 this.parameterTypes = parameterTypes; 87 } 88 89 @Override equals(Object o)90 public boolean equals(Object o) { 91 if (this == o) return true; 92 if (o == null || getClass() != o.getClass()) return false; 93 MethodSignature that = (MethodSignature) o; 94 if (!returnType.equals(that.returnType)) return false; 95 if (!name.equals(that.name)) return false; 96 return Arrays.equals(parameterTypes, that.parameterTypes); 97 } 98 99 @Override hashCode()100 public int hashCode() { 101 int result = returnType.hashCode(); 102 result = 31 * result + name.hashCode(); 103 result = 31 * result + Arrays.hashCode(parameterTypes); 104 return result; 105 } 106 } 107 } 108 109