TestIterables.java revision 1465:b52a38d4536c
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 /tools/javac/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