TestIterables.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 6406164 27 * @summary Test that ElementFilter iterable methods behave properly. 28 * @author Joseph D. Darcy 29 * @library ../../../../lib 30 * @build JavacTestingAbstractProcessor 31 * @compile TestIterables.java 32 * @compile -processor TestIterables -proc:only Foo1.java 33 * @compile Foo1.java 34 * @compile -processor TestIterables Foo1 TestIterables.java 35 */ 36 37import java.util.Set; 38import java.util.HashSet; 39import java.util.Arrays; 40import java.util.Iterator; 41import javax.annotation.processing.*; 42import javax.lang.model.SourceVersion; 43import static javax.lang.model.SourceVersion.*; 44import javax.lang.model.element.*; 45import javax.lang.model.util.*; 46import static javax.tools.Diagnostic.Kind.*; 47 48import static javax.lang.model.util.ElementFilter.*; 49 50/** 51 * Verify that the {@code ElementFilter} methods taking iterables 52 * behave correctly by comparing ExpectedElementCounts with actual 53 * results. 54 */ 55@SupportedAnnotationTypes("ExpectedElementCounts") 56@ExpectedElementCounts(methods=2) 57public class TestIterables extends JavacTestingAbstractProcessor { 58 public boolean process(Set<? extends TypeElement> annotations, 59 RoundEnvironment roundEnv) { 60 if (!roundEnv.processingOver()) { 61 boolean error = false; 62 int topLevelCount = 0; 63 64 for (TypeElement type : typesIn(roundEnv.getRootElements())) { 65 topLevelCount++; 66 ExpectedElementCounts elementCounts = type.getAnnotation(ExpectedElementCounts.class); 67 if (elementCounts == null) 68 throw new RuntimeException("Missing ExpectedElementCounts annotation!"); 69 70 Iterable<? extends Element> irritable = type.getEnclosedElements(); 71 72 int constructorCount = getCount(constructorsIn(irritable)); 73 int fieldCount = getCount(fieldsIn(irritable)); 74 int methodCount = getCount(methodsIn(irritable)); 75 int typeCount = getCount(typesIn(irritable)); 76 77 System.out.println("\nType: " + type.getQualifiedName()); 78 System.out.format("Element Actual\tExpected%n"); 79 System.out.format("constructors %d\t\t%d%n", constructorCount, elementCounts.constructors()); 80 System.out.format("fields %d\t\t%d%n", fieldCount, elementCounts.fields()); 81 System.out.format("methods %d\t\t%d%n", methodCount, elementCounts.methods()); 82 System.out.format("types %d\t\t%d%n", typeCount, elementCounts.types()); 83 84 if ((constructorCount != elementCounts.constructors()) || 85 (fieldCount != elementCounts.fields()) || 86 (methodCount != elementCounts.methods()) || 87 (typeCount != elementCounts.types()) ) 88 error = true; 89 } 90 91 if (topLevelCount == 0) 92 error = true; 93 94 if (error) 95 throw new RuntimeException("A count mismatch has occured."); 96 } 97 98 return true; 99 } 100 101 private int getCount(Iterable<? extends Element> iter) { 102 int count1 = 0; 103 int count2 = 0; 104 105 Iterator<? extends Element> iterator = iter.iterator(); 106 while (iterator.hasNext() ) { 107 count1++; 108 iterator.next(); 109 } 110 111 iterator = iter.iterator(); 112 while (iterator.hasNext() ) { 113 count2++; 114 iterator.next(); 115 } 116 117 if (count1 != count2) 118 throw new RuntimeException("Inconsistent counts from iterator."); 119 120 return count1; 121 } 122} 123