Mon, 12 Jul 2010 19:43:19 -0700
Merge
1 /*
2 * Copyright (c) 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 */
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 */
32 import java.util.*;
34 import javax.annotation.processing.*;
35 import javax.lang.model.*;
36 import javax.lang.model.element.*;
38 import com.sun.source.tree.*;
39 import com.sun.source.util.*;
41 @SupportedAnnotationTypes("*")
42 public class T6855236 extends AbstractProcessor {
44 private Trees trees;
46 @Override
47 public void init(ProcessingEnvironment pe) {
48 super.init(pe);
49 trees = Trees.instance(pe);
50 }
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();
57 for (Element e : roundEnvironment.getRootElements()) {
58 TreePath tp = trees.getPath(e);
59 visitor.scan(tp, trees);
60 }
62 return true;
63 }
65 @Override
66 public SourceVersion getSupportedSourceVersion() {
67 return SourceVersion.latest();
68 }
70 class CodeVisitor extends TreePathScanner<Object, Trees> {
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 }
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 }
95 }
97 }