1 /*
2  * Copyright (c) 2006, 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     6413682
27  * @summary Compiler confused about implicit type args and arrays
28  * @author  Peter von der Ah\u00e9
29  */
30 
31 import com.sun.source.tree.CompilationUnitTree;
32 import com.sun.source.tree.ErroneousTree;
33 import com.sun.source.tree.Tree;
34 import com.sun.source.util.JavacTask;
35 import com.sun.source.util.TreeScanner;
36 import com.sun.source.util.Trees;
37 import java.io.IOException;
38 import java.net.URI;
39 import java.util.Collections;
40 import java.util.List;
41 import javax.tools.Diagnostic;
42 import javax.tools.DiagnosticListener;
43 import javax.tools.JavaCompiler;
44 import javax.tools.JavaFileObject;
45 import javax.tools.SimpleJavaFileObject;
46 import static javax.tools.JavaFileObject.Kind.SOURCE;
47 import javax.tools.ToolProvider;
48 
49 public class TestPos {
50 
51     static final String errCode = "compiler.err.cannot.create.array.with.type.arguments";
52     static final String expected =
53         String.format("%s%n%s%n",
54                       "compiler.err.cannot.create.array.with.type.arguments @ 33",
55                       "begin=28, end=50 : new Object[0],T,e,s,t");
56 
main(String... args)57     public static void main(String... args) throws IOException {
58         final boolean[] sawError = { false };
59         final StringBuilder log = new StringBuilder();
60         class MyFileObject extends SimpleJavaFileObject {
61             MyFileObject() {
62                 super(URI.create("myfo:///Test.java"), SOURCE);
63             }
64             @Override
65             public String getCharContent(boolean ignoreEncodingErrors) {
66                 //      0         1         2         3         4         5
67                 //      0123456789012345678901234567890123456789012345678901234
68                 return "class Test { { Object[] o = new <T,e,s,t>Object[0]; } }";
69             }
70         }
71         class Scanner extends TreeScanner<Void,Trees> {
72             CompilationUnitTree toplevel = null;
73             @Override
74             public Void visitCompilationUnit(CompilationUnitTree node, Trees trees) {
75                 toplevel = node;
76                 return super.visitCompilationUnit(node, trees);
77             }
78             @Override
79             public Void visitErroneous(ErroneousTree node, Trees trees) {
80                 sawError[0] = true;
81                 long startPos = trees.getSourcePositions().getStartPosition(toplevel, node);
82                 long endPos = trees.getSourcePositions().getEndPosition(toplevel, node);
83                 log.append(String.format("begin=%s, end=%s : %s%n",
84                                          startPos,
85                                          endPos,
86                                          node.getErrorTrees()));
87                 if (startPos != 28)
88                     error("Start pos for %s is incorrect (%s)!", node, startPos);
89                 if (endPos != 50)
90                     error("End pos for %s is incorrect (%s)!", node, endPos);
91                 return null;
92             }
93         }
94         JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
95         List<JavaFileObject> compilationUnits =
96                 Collections.<JavaFileObject>singletonList(new MyFileObject());
97         DiagnosticListener<JavaFileObject> dl = new DiagnosticListener<JavaFileObject>() {
98             public void report(Diagnostic<? extends JavaFileObject> diag) {
99                 log.append(String.format("%s @ %s%n", diag.getCode(), diag.getPosition()));
100                 if (!diag.getCode().equals(errCode))
101                     error("unexpected error");
102                 if (diag.getPosition() != 33)
103                     error("Error pos for %s is incorrect (%s)!",
104                           diag.getCode(), diag.getPosition());
105                 sawError[0] = true;
106             }
107         };
108         JavacTask task = (JavacTask)javac.getTask(null, null, dl, null, null,
109                                                   compilationUnits);
110         Trees trees = Trees.instance(task);
111         Iterable<? extends Tree> toplevels = task.parse();
112         if (!sawError[0])
113             error("No parse error detected");
114         sawError[0] = false;
115         new Scanner().scan(toplevels, trees);
116         if (!sawError[0])
117             error("No error tree detected");
118         if (!log.toString().equals(expected))
119             error("Unexpected log message: %n%s%n", log);
120         System.out.print(log);
121         System.out.flush();
122     }
123 
error(String format, Object... args)124     static void error(String format, Object... args) {
125         throw new AssertionError(String.format(format, args));
126     }
127 
128 }
129