1 /* 2 * Copyright (c) 2006, 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 /* 25 * @test 26 * @bug 6453386 27 * @summary Verify that example code in Elements.overrides works as spec'ed. 28 * @author Scott Seligman 29 * @compile -g OverridesSpecEx.java 30 * @compile -processor OverridesSpecEx -proc:only OverridesSpecEx.java 31 */ 32 33 import java.util.Set; 34 import javax.annotation.processing.*; 35 import javax.lang.model.SourceVersion; 36 import javax.lang.model.element.*; 37 import javax.lang.model.type.*; 38 import javax.lang.model.util.*; 39 40 import static javax.lang.model.util.ElementFilter.*; 41 42 43 @SupportedAnnotationTypes("*") 44 public class OverridesSpecEx extends AbstractProcessor { 45 46 Elements elements; 47 Types types; 48 49 public void init(ProcessingEnvironment penv) { 50 super.init(penv); 51 elements = penv.getElementUtils(); 52 types = penv.getTypeUtils(); 53 } 54 55 public boolean process(Set<? extends TypeElement> annoTypes, 56 RoundEnvironment round) { 57 if (!round.processingOver()) 58 doit(annoTypes, round); 59 return true; 60 } 61 62 @Override 63 public SourceVersion getSupportedSourceVersion() { 64 return SourceVersion.latest(); 65 } 66 67 private void doit(Set<? extends TypeElement> annoTypes, 68 RoundEnvironment round) { 69 TypeElement string = elements.getTypeElement("java.lang.String"); 70 TypeElement object = elements.getTypeElement("java.lang.Object"); 71 72 ExecutableElement m1 = null; 73 ExecutableElement m2 = null; 74 for (ExecutableElement m : methodsIn(string.getEnclosedElements())) { 75 if (m.getSimpleName().contentEquals("hashCode")) { 76 m1 = m; 77 break; 78 } 79 } 80 for (ExecutableElement m : methodsIn(object.getEnclosedElements())) { 81 if (m.getSimpleName().contentEquals("hashCode")) { 82 m2 = m; 83 break; 84 } 85 } 86 87 boolean res = 88 elements.overrides(m1, m2, (TypeElement) m1.getEnclosingElement()); 89 System.out.println("String.hashCode overrides Object.hashCode? " + res); 90 checkResult(res); 91 92 TypeElement a = elements.getTypeElement("OverridesSpecEx.A"); 93 TypeElement b = elements.getTypeElement("OverridesSpecEx.B"); 94 TypeElement c = elements.getTypeElement("OverridesSpecEx.C"); 95 96 m1 = null; 97 m2 = null; 98 for (ExecutableElement m : methodsIn(a.getEnclosedElements())) 99 m1 = m; 100 for (ExecutableElement m : methodsIn(b.getEnclosedElements())) 101 m2 = m; 102 103 res = elements.overrides(m1, m2, a); 104 System.out.println("A.m overrides B.m in B? " + res); 105 checkResult(!res); 106 res = elements.overrides(m1, m2, c); 107 System.out.println("A.m overrides B.m in C? " + res); 108 checkResult(res); 109 } 110 111 private static void checkResult(boolean truthiness) { 112 if (!truthiness) 113 throw new AssertionError("Bogus result"); 114 } 115 116 117 // Fodder for the processor 118 119 class A { 120 public void m() {} 121 } 122 interface B { 123 void m(); 124 } 125 class C extends A implements B { 126 } 127 }