OverridesSpecEx.java revision 698:d2aaaec153e8
1/* 2 * Copyright (c) 2006, 2010, 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 * @library ../../../lib 30 * @build JavacTestingAbstractProcessor 31 * @compile -g OverridesSpecEx.java 32 * @compile -processor OverridesSpecEx -proc:only OverridesSpecEx.java 33 */ 34 35import java.util.Set; 36import javax.annotation.processing.*; 37import javax.lang.model.SourceVersion; 38import javax.lang.model.element.*; 39import javax.lang.model.type.*; 40import javax.lang.model.util.*; 41 42import static javax.lang.model.util.ElementFilter.*; 43 44public class OverridesSpecEx extends JavacTestingAbstractProcessor { 45 public boolean process(Set<? extends TypeElement> annoTypes, 46 RoundEnvironment round) { 47 if (!round.processingOver()) 48 doit(annoTypes, round); 49 return true; 50 } 51 52 private void doit(Set<? extends TypeElement> annoTypes, 53 RoundEnvironment round) { 54 TypeElement string = elements.getTypeElement("java.lang.String"); 55 TypeElement object = elements.getTypeElement("java.lang.Object"); 56 57 ExecutableElement m1 = null; 58 ExecutableElement m2 = null; 59 for (ExecutableElement m : methodsIn(string.getEnclosedElements())) { 60 if (m.getSimpleName().contentEquals("hashCode")) { 61 m1 = m; 62 break; 63 } 64 } 65 for (ExecutableElement m : methodsIn(object.getEnclosedElements())) { 66 if (m.getSimpleName().contentEquals("hashCode")) { 67 m2 = m; 68 break; 69 } 70 } 71 72 boolean res = 73 elements.overrides(m1, m2, (TypeElement) m1.getEnclosingElement()); 74 System.out.println("String.hashCode overrides Object.hashCode? " + res); 75 checkResult(res); 76 77 TypeElement a = elements.getTypeElement("OverridesSpecEx.A"); 78 TypeElement b = elements.getTypeElement("OverridesSpecEx.B"); 79 TypeElement c = elements.getTypeElement("OverridesSpecEx.C"); 80 81 m1 = null; 82 m2 = null; 83 for (ExecutableElement m : methodsIn(a.getEnclosedElements())) 84 m1 = m; 85 for (ExecutableElement m : methodsIn(b.getEnclosedElements())) 86 m2 = m; 87 88 res = elements.overrides(m1, m2, a); 89 System.out.println("A.m overrides B.m in B? " + res); 90 checkResult(!res); 91 res = elements.overrides(m1, m2, c); 92 System.out.println("A.m overrides B.m in C? " + res); 93 checkResult(res); 94 } 95 96 private static void checkResult(boolean truthiness) { 97 if (!truthiness) 98 throw new AssertionError("Bogus result"); 99 } 100 101 // Fodder for the processor 102 class A { 103 public void m() {} 104 } 105 interface B { 106 void m(); 107 } 108 class C extends A implements B { 109 } 110} 111