T6855236.java revision 494:fe17a9dbef03 
1/*
2 * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24/*
25 * @test
26 * @bug 6855236
27 * @summary Compiler Tree API TreePath class generates NullPointerException from Iterator
28 * @compile T6855236.java
29 * @compile -processor T6855236 -proc:only T6855236.java
30 */
31
32import java.util.*;
33
34import javax.annotation.processing.*;
35import javax.lang.model.*;
36import javax.lang.model.element.*;
37
38import com.sun.source.tree.*;
39import com.sun.source.util.*;
40
41@SupportedAnnotationTypes("*")
42public class T6855236 extends AbstractProcessor {
43
44    private Trees trees;
45
46    @Override
47    public void init(ProcessingEnvironment pe) {
48        super.init(pe);
49        trees = Trees.instance(pe);
50    }
51
52    @Override
53    public boolean process(Set<? extends TypeElement> arg0, RoundEnvironment roundEnvironment) {
54        // Scanner class to scan through various component elements
55        CodeVisitor visitor = new CodeVisitor();
56
57        for (Element e : roundEnvironment.getRootElements()) {
58            TreePath tp = trees.getPath(e);
59            visitor.scan(tp, trees);
60        }
61
62        return true;
63    }
64
65    @Override
66    public SourceVersion getSupportedSourceVersion() {
67        return SourceVersion.latest();
68    }
69
70    class CodeVisitor extends TreePathScanner<Object, Trees> {
71
72        @Override
73        public Object visitMethodInvocation(MethodInvocationTree node, Trees p) {
74            System.out.print("current path: ");
75            for (Tree t : getCurrentPath()) {
76                System.out.print('/');
77                System.out.print(t);
78           }
79            System.out.println();
80            System.out.println("parent path: " + getCurrentPath().getParentPath());
81            System.out.println("method select: " + node.getMethodSelect().toString());
82            for (ExpressionTree arg : node.getArguments()) {
83                System.out.println("argument: " + arg.toString());
84            }
85            return super.visitMethodInvocation(node, p);
86        }
87
88        @Override
89        public Object visitExpressionStatement(ExpressionStatementTree node, Trees p) {
90            ExpressionTree t = node.getExpression();
91            System.out.println("expression statement: " + t.toString());
92            return super.visitExpressionStatement(node, p);
93        }
94
95    }
96
97}
98
99
100