1/*
2 * Copyright (c) 2010, 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 6863465
27 * @summary  javac doesn't detect circular subclass dependencies via qualified names
28 * @modules jdk.compiler
29 * @run main TestCircularClassfile
30 */
31
32import java.io.*;
33import java.net.URI;
34import java.util.Arrays;
35import javax.tools.Diagnostic;
36import javax.tools.DiagnosticListener;
37import javax.tools.JavaCompiler;
38import javax.tools.JavaFileObject;
39import javax.tools.SimpleJavaFileObject;
40import javax.tools.ToolProvider;
41
42import com.sun.source.util.JavacTask;
43import java.util.EnumSet;
44
45public class TestCircularClassfile {
46
47    enum ClassName {
48        A("A"),
49        B("B"),
50        C("C"),
51        OBJECT("Object");
52
53        String name;
54
55        ClassName(String name) {
56            this.name = name;
57        }
58    }
59
60    static class JavaSource extends SimpleJavaFileObject {
61
62        final static String sourceStub = "class #C extends #S {}";
63
64        String source;
65
66        public JavaSource(ClassName clazz, ClassName sup) {
67            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
68            source = sourceStub.replace("#C", clazz.name).replace("#S", sup.name);
69        }
70
71        @Override
72        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
73            return source;
74        }
75    }
76
77    public static void main(String... args) throws Exception {
78        int count = 0;
79        for (ClassName clazz : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
80            for (ClassName sup : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {
81                if (sup.ordinal() < clazz.ordinal()) continue;
82                check("sub_"+count++, clazz, sup);
83            }
84        }
85    }
86
87    static JavaSource[] initialSources = new JavaSource[] {
88            new JavaSource(ClassName.A, ClassName.OBJECT),
89            new JavaSource(ClassName.B, ClassName.A),
90            new JavaSource(ClassName.C, ClassName.B)
91        };
92
93    static String workDir = System.getProperty("user.dir");
94
95    static void check(String destPath, ClassName clazz, ClassName sup) throws Exception {
96        File destDir = new File(workDir, destPath); destDir.mkdir();
97        final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
98        JavacTask ct = (JavacTask)tool.getTask(null, null, null,
99                Arrays.asList("-d", destPath), null, Arrays.asList(initialSources));
100        ct.generate();
101        File fileToRemove = new File(destPath, clazz.name + ".class");
102        fileToRemove.delete();
103        JavaSource newSource = new JavaSource(clazz, sup);
104        DiagnosticChecker checker = new DiagnosticChecker();
105        ct = (JavacTask)tool.getTask(null, null, checker,
106                Arrays.asList("-cp", destPath), null, Arrays.asList(newSource));
107        ct.analyze();
108        if (!checker.errorFound) {
109            throw new AssertionError(newSource.source);
110        }
111    }
112
113    static class DiagnosticChecker implements DiagnosticListener<JavaFileObject> {
114
115        boolean errorFound = false;
116
117        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
118            if (diagnostic.getKind() == Diagnostic.Kind.ERROR &&
119                    diagnostic.getCode().equals("compiler.err.cyclic.inheritance")) {
120                errorFound = true;
121            }
122        }
123    }
124}
125