1/*
2 * Copyright (c) 2011, 2015, 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 6993305
27 * @summary starting position of a method without modifiers and with type parameters is incorrect
28 * @modules jdk.compiler/com.sun.tools.javac.api
29 *          jdk.compiler/com.sun.tools.javac.file
30 */
31
32import java.io.File;
33import javax.tools.JavaFileObject;
34import javax.tools.StandardJavaFileManager;
35
36import com.sun.source.tree.CompilationUnitTree;
37import com.sun.source.tree.MethodTree;
38import com.sun.source.util.JavacTask;
39import com.sun.source.util.SourcePositions;
40import com.sun.source.util.TreeScanner;
41import com.sun.source.util.Trees;
42import com.sun.tools.javac.api.JavacTool;
43import java.io.IOException;
44
45/*
46 * Test verifies the starting position of all methods by computing the start position
47 * of each method as the first non-white character on the first line containing
48 * (" " + methodName + "("), and then comparing this value against the reported
49 * value in the SourcePositions table.
50 */
51public class T6993305 {
52    <T> void test1(T t) { }  // this is the primary case to be tested
53    public <T> void test2(T t) { }
54    @Deprecated <T> void test3(T t) { }
55
56    public static void main(String... args) throws Exception {
57        new T6993305().run();
58    }
59
60    void run() throws Exception {
61        File testSrc = new File(System.getProperty("test.src"));
62
63        JavacTool tool = JavacTool.create();
64        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
65
66            File f = new File(testSrc, T6993305.class.getSimpleName() + ".java");
67            Iterable<? extends JavaFileObject> fos = fm.getJavaFileObjects(f);
68            JavacTask task = tool.getTask(null, fm, null, null, null, fos);
69            Iterable<? extends CompilationUnitTree> cus = task.parse();
70
71            TestScanner s = new TestScanner();
72            s.scan(cus, task);
73
74            if (errors > 0)
75                throw new Exception(errors + " errors occurred");
76        }
77    }
78
79    void error(String msg) {
80        System.err.println("Error: " + msg);
81        errors++;
82    }
83
84    int errors;
85
86    class TestScanner extends TreeScanner<Void, JavacTask> {
87        CompilationUnitTree cu;
88        SourcePositions sourcePositions;
89        String source;
90
91        void show(String label, int pos) {
92            System.err.println(label + ": " +
93                    source.substring(pos, Math.min(source.length(), pos + 10)));
94        }
95
96        @Override public Void visitCompilationUnit(CompilationUnitTree tree, JavacTask task) {
97            cu = tree;
98            Trees trees = Trees.instance(task);
99            sourcePositions = trees.getSourcePositions();
100            try {
101                source = String.valueOf(tree.getSourceFile().getCharContent(true));
102            } catch (IOException e) {
103                throw new Error(e);
104            }
105            return super.visitCompilationUnit(tree, task);
106        }
107
108        // this is the core of the test
109        @Override public Void visitMethod(MethodTree tree, JavacTask task) {
110            String name = String.valueOf(tree.getName());
111            int pos = source.indexOf(" " + name + "(");
112            while (source.charAt(pos - 1) != '\n') pos--;
113            while (source.charAt(pos) == ' ') pos++;
114            int expectedStart = pos;
115            int reportedStart = (int) sourcePositions.getStartPosition(cu, tree);
116            System.err.println("Method " + name
117                    + " expectedStart:" + expectedStart
118                    + " reportedStart:" + reportedStart);
119            if (expectedStart != reportedStart) {
120                error("Unexpected value for " + name);
121                show("expected", expectedStart);
122                show("reported", reportedStart);
123            }
124            return super.visitMethod(tree, task);
125        }
126    }
127}
128