Fri, 24 Apr 2020 03:58:51 +0100
Merge
1 /*
2 * Copyright (c) 2013, 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 8012929
27 * @summary Trees.getElement should work not only for declaration trees, but also for use-trees
28 * @build TestGetElementReference
29 * @run main TestGetElementReference
30 */
32 import com.sun.source.tree.CompilationUnitTree;
33 import com.sun.source.tree.Tree;
34 import com.sun.source.util.*;
35 import java.io.File;
36 import java.io.IOException;
37 import java.net.URI;
38 import java.util.Arrays;
39 import java.util.regex.Matcher;
40 import java.util.regex.Pattern;
41 import javax.lang.model.element.Element;
42 import javax.tools.Diagnostic;
43 import javax.tools.DiagnosticCollector;
44 import javax.tools.JavaFileObject;
45 import javax.tools.SimpleJavaFileObject;
46 import javax.tools.StandardJavaFileManager;
47 import javax.tools.ToolProvider;
49 public class TestGetElementReference {
51 public static void main(String... args) throws IOException {
52 File source = new File(System.getProperty("test.src", "."), "TestGetElementReferenceData.java").getAbsoluteFile();
53 StandardJavaFileManager fm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(null, null, null);
54 DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
55 JavacTask ct = (JavacTask) ToolProvider.getSystemJavaCompiler().getTask(null, null, diagnostics, Arrays.asList("-Xjcov", "-source", "1.8"), null, fm.getJavaFileObjects(source));
56 Trees trees = Trees.instance(ct);
57 CompilationUnitTree cut = ct.parse().iterator().next();
59 ct.analyze();
61 for (Diagnostic<? extends JavaFileObject> d : diagnostics.getDiagnostics()) {
62 if (d.getKind() == Diagnostic.Kind.ERROR) {
63 throw new IllegalStateException("Should have been attributed without errors: " + diagnostics.getDiagnostics());
64 }
65 }
67 Pattern p = Pattern.compile("/\\*getElement:(.*?)\\*/");
68 Matcher m = p.matcher(cut.getSourceFile().getCharContent(false));
70 while (m.find()) {
71 TreePath tp = pathFor(trees, cut, m.start() - 1);
72 Element found = trees.getElement(tp);
73 String expected = m.group(1);
74 String actual = found != null ? found.getKind() + ":" + symbolToString(found) : "<null>";
76 if (!expected.equals(actual)) {
77 throw new IllegalStateException("expected=" + expected + "; actual=" + actual);
78 }
79 }
80 }
82 private static TreePath pathFor(final Trees trees, final CompilationUnitTree cut, final int pos) {
83 final TreePath[] result = new TreePath[1];
85 new TreePathScanner<Void, Void>() {
86 @Override public Void scan(Tree node, Void p) {
87 if ( node != null
88 && trees.getSourcePositions().getStartPosition(cut, node) <= pos
89 && pos <= trees.getSourcePositions().getEndPosition(cut, node)) {
90 result[0] = new TreePath(getCurrentPath(), node);
91 return super.scan(node, p);
92 }
93 return null;
94 }
95 }.scan(cut, null);
97 return result[0];
98 }
100 private static String symbolToString(Element el) {
101 switch (el.getKind()) {
102 case METHOD: return symbolToString(el.getEnclosingElement()) + "." + el.toString();
103 case CONSTRUCTOR: return symbolToString(el.getEnclosingElement().getEnclosingElement()) + "." + el.toString();
104 default:
105 return el.toString();
106 }
107 }
109 static class TestFileObject extends SimpleJavaFileObject {
110 private final String text;
111 public TestFileObject(String text) {
112 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
113 this.text = text;
114 }
115 @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) {
116 return text;
117 }
118 }
120 }