1 /*
2  * Copyright (c) 2017, 2019, 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 8231827
27  * @summary Check proper positions.
28  * @build PatternMatchPosTest
29  * @compile/ref=PatternMatchPosTest.out -processor PatternMatchPosTest -Xlint:unchecked -XDrawDiagnostics PatternMatchPosTestData.java
30  */
31 
32 import java.io.IOException;
33 import java.util.Set;
34 
35 import javax.annotation.processing.AbstractProcessor;
36 import javax.annotation.processing.RoundEnvironment;
37 import javax.annotation.processing.SupportedAnnotationTypes;
38 import javax.lang.model.SourceVersion;
39 import javax.lang.model.element.TypeElement;
40 
41 import com.sun.source.tree.IfTree;
42 import com.sun.source.tree.Tree;
43 import com.sun.source.util.SourcePositions;
44 import com.sun.source.util.TreePath;
45 import com.sun.source.util.TreeScanner;
46 import com.sun.source.util.Trees;
47 import javax.tools.Diagnostic;
48 
49 @SupportedAnnotationTypes("*")
50 public class PatternMatchPosTest extends AbstractProcessor {
51 
52     int round;
53 
54     @Override
process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv)55     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
56         if (round++ != 0)
57             return false;
58 
59         try {
60             TypeElement data = processingEnv.getElementUtils().getTypeElement("PatternMatchPosTestData");
61             Trees trees = Trees.instance(processingEnv);
62             SourcePositions sp = trees.getSourcePositions();
63             TreePath dataPath = trees.getPath(data);
64             String text = dataPath.getCompilationUnit().getSourceFile().getCharContent(true).toString();
65 
66             new TreeScanner<Void, Void>() {
67                 boolean print;
68                 @Override
69                 public Void visitIf(IfTree node, Void p) {
70                     boolean prevPrint = print;
71                     try {
72                         print = true;
73                         scan(node.getCondition(), p);
74                     } finally {
75                         print = prevPrint;
76                     }
77                     scan(node.getThenStatement(), p);
78                     scan(node.getElseStatement(), p);
79                     return null;
80                 }
81                 @Override
82                 public Void scan(Tree tree, Void p) {
83                     if (tree == null)
84                         return null;
85                     if (print) {
86                         int start = (int) sp.getStartPosition(dataPath.getCompilationUnit(), tree);
87                         int end = (int) sp.getEndPosition(dataPath.getCompilationUnit(), tree);
88                         if (start != (-1) || end != (-1)) {
89                             processingEnv.getMessager().printMessage(Diagnostic.Kind.NOTE,
90                                                                      text.substring(start, end));
91                         }
92                     }
93                     return super.scan(tree, p);
94                 }
95             }.scan(dataPath.getLeaf(), null);
96             return false;
97         } catch (IOException ex) {
98             throw new IllegalStateException(ex);
99         }
100     }
101 
102     @Override
getSupportedSourceVersion()103     public SourceVersion getSupportedSourceVersion() {
104         return SourceVersion.latestSupported();
105     }
106 
107 }
108