ModelChecker.java revision 1053:111bbf1ad913 
1/*
2 * Copyright (c) 2010, 2011, 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 6993963 7025809
27 * @summary Project Coin: Use precise exception analysis for effectively final catch parameters
28 * @library ../../lib
29 * @build JavacTestingAbstractProcessor ModelChecker
30 * @compile -processor ModelChecker Model01.java
31 */
32
33import com.sun.source.tree.CatchTree;
34import com.sun.source.util.TreePathScanner;
35import com.sun.source.util.Trees;
36import com.sun.source.util.TreePath;
37
38import java.util.Set;
39import javax.annotation.processing.RoundEnvironment;
40import javax.annotation.processing.SupportedAnnotationTypes;
41import javax.lang.model.element.Element;
42import javax.lang.model.element.ElementKind;
43import javax.lang.model.element.TypeElement;
44import javax.lang.model.type.TypeMirror;
45import javax.lang.model.type.TypeKind;
46import javax.lang.model.type.UnionType;
47import javax.lang.model.type.UnknownTypeException;
48import javax.lang.model.util.SimpleTypeVisitor6;
49import javax.lang.model.util.SimpleTypeVisitor7;
50
51@SupportedAnnotationTypes("Check")
52public class ModelChecker extends JavacTestingAbstractProcessor {
53
54    @Override
55    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
56        if (roundEnv.processingOver())
57            return true;
58
59        Trees trees = Trees.instance(processingEnv);
60
61        TypeElement testAnno = elements.getTypeElement("Check");
62        for (Element elem: roundEnv.getElementsAnnotatedWith(testAnno)) {
63            TreePath p = trees.getPath(elem);
64            new MulticatchParamTester(trees).scan(p, null);
65        }
66        return true;
67    }
68
69    class MulticatchParamTester extends TreePathScanner<Void, Void> {
70        Trees trees;
71
72        public MulticatchParamTester(Trees trees) {
73            super();
74            this.trees = trees;
75        }
76
77        @Override
78        public Void visitCatch(CatchTree node, Void p) {
79            TreePath param = new TreePath(getCurrentPath(), node.getParameter());
80            Element ex = trees.getElement(param);
81            validateUnionTypeInfo(ex);
82            if (ex.getSimpleName().contentEquals("ex")) {
83                assertTrue(ex.getKind() == ElementKind.EXCEPTION_PARAMETER, "Expected EXCEPTION_PARAMETER - found " + ex.getKind());
84                for (Element e : types.asElement(trees.getLub(node)).getEnclosedElements()) {
85                    Member m = e.getAnnotation(Member.class);
86                    if (m != null) {
87                        assertTrue(e.getKind() == m.value(), "Expected " + m.value() + " - found " + e.getKind());
88                    }
89                }
90                assertTrue(assertionCount == 9, "Expected 9 assertions - found " + assertionCount);
91            }
92            return super.visitCatch(node, p);
93        }
94    }
95
96    private void validateUnionTypeInfo(Element ex) {
97        UnionTypeInfo ut = ex.getAnnotation(UnionTypeInfo.class);
98        assertTrue(ut != null, "UnionType annotation must be present");
99
100        TypeMirror expectedUnionType = ex.asType();
101        assertTrue(expectedUnionType.getKind() == TypeKind.UNION, "UNION kind expected");
102
103        try {
104            new SimpleTypeVisitor6<Void, Void>(){}.visit(expectedUnionType);
105            throw new RuntimeException("Expected UnknownTypeException not thrown.");
106        } catch (UnknownTypeException ute) {
107            ; // Expected
108        }
109
110        UnionType unionType = new SimpleTypeVisitor<UnionType, Void>(){
111            @Override
112            protected UnionType defaultAction(TypeMirror e, Void p) {return null;}
113
114            @Override
115            public UnionType visitUnion(UnionType t, Void p) {return t;}
116        }.visit(expectedUnionType);
117        assertTrue(unionType != null, "Must get a non-null union type.");
118
119        assertTrue(ut.value().length == unionType.getAlternatives().size(), "Cardinalities do not match");
120
121        String[] typeNames = ut.value();
122        for(int i = 0; i < typeNames.length; i++) {
123            TypeMirror typeFromAnnotation = nameToType(typeNames[i]);
124            assertTrue(types.isSameType(typeFromAnnotation, unionType.getAlternatives().get(i)),
125                       "Types were not equal.");
126        }
127    }
128
129    private TypeMirror nameToType(String name) {
130        return elements.getTypeElement(name).asType();
131    }
132
133    private static void assertTrue(boolean cond, String msg) {
134        assertionCount++;
135        if (!cond)
136            throw new AssertionError(msg);
137    }
138
139    static int assertionCount = 0;
140}
141