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 7086601
27 * @summary Error message bug: cause for method mismatch is 'null'
28 * @modules jdk.compiler
29 */
30
31import com.sun.source.util.JavacTask;
32import java.net.URI;
33import java.util.Arrays;
34import java.util.ArrayList;
35import javax.tools.Diagnostic;
36import javax.tools.JavaCompiler;
37import javax.tools.JavaFileObject;
38import javax.tools.SimpleJavaFileObject;
39import javax.tools.StandardJavaFileManager;
40import javax.tools.ToolProvider;
41
42
43public class T7086601b {
44
45    static int checkCount = 0;
46
47    enum TypeKind {
48        STRING("String", false),
49        INTEGER("Integer", false),
50        NUMBER("Number", false),
51        SERIALIZABLE("java.io.Serializable", true),
52        CLONEABLE("Cloneable", true),
53        X("X", false),
54        Y("Y", false),
55        Z("Z", false);
56
57        String typeStr;
58        boolean isInterface;
59
60        private TypeKind(String typeStr, boolean isInterface) {
61            this.typeStr = typeStr;
62            this.isInterface = isInterface;
63        }
64
65        boolean isSubtypeof(TypeKind other) {
66            return (this == INTEGER && other == NUMBER ||
67                    this == Z && other == Y ||
68                    this == other);
69        }
70    }
71
72    enum MethodCallKind {
73        ARITY_ONE("m(a1);", 1),
74        ARITY_TWO("m(a1, a2);", 2),
75        ARITY_THREE("m(a1, a2, a3);", 3);
76
77        String invokeString;
78        int arity;
79
80        private MethodCallKind(String invokeString, int arity) {
81            this.invokeString = invokeString;
82            this.arity = arity;
83        }
84    }
85
86    public static void main(String... args) throws Exception {
87
88        //create default shared JavaCompiler - reused across multiple compilations
89        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
90        try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {
91
92            for (TypeKind a1 : TypeKind.values()) {
93                for (TypeKind a2 : TypeKind.values()) {
94                    for (TypeKind a3 : TypeKind.values()) {
95                        for (MethodCallKind mck : MethodCallKind.values()) {
96                            new T7086601b(a1, a2, a3, mck).run(comp, fm);
97                        }
98                    }
99                }
100            }
101            System.out.println("Total check executed: " + checkCount);
102        }
103    }
104
105    TypeKind a1;
106    TypeKind a2;
107    TypeKind a3;
108    MethodCallKind mck;
109    JavaSource source;
110    DiagnosticChecker diagChecker;
111
112    T7086601b(TypeKind a1, TypeKind a2, TypeKind a3, MethodCallKind mck) {
113        this.a1 = a1;
114        this.a2 = a2;
115        this.a3 = a3;
116        this.mck = mck;
117        this.source = new JavaSource();
118        this.diagChecker = new DiagnosticChecker();
119    }
120
121    class JavaSource extends SimpleJavaFileObject {
122
123        final String bodyTemplate = "import java.util.List;\n"+
124                              "class Test {\n" +
125                              "   <Z> void m(List<? super Z> l1) { }\n" +
126                              "   <Z> void m(List<? super Z> l1, List<? super Z> l2) { }\n" +
127                              "   <Z> void m(List<? super Z> l1, List<? super Z> l2, List<? super Z> l3) { }\n" +
128                              "   <X,Y,Z extends Y> void test(List<#A1> a1, List<#A2> a2, List<#A3> a3) { #MC } }";
129
130        String source;
131
132        public JavaSource() {
133            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
134            source = bodyTemplate.replace("#A1", a1.typeStr)
135                             .replace("#A2", a2.typeStr).replace("#A3", a3.typeStr)
136                             .replace("#MC", mck.invokeString);
137        }
138
139        @Override
140        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
141            return source;
142        }
143    }
144
145    void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
146        JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
147                null, null, Arrays.asList(source));
148        try {
149            ct.analyze();
150        } catch (Throwable ex) {
151            throw new AssertionError("Error thrown when compiling the following code:\n" + source.getCharContent(true));
152        }
153        check();
154    }
155
156    void check() {
157        checkCount++;
158
159        boolean errorExpected = false;
160
161        if (mck.arity > 1) {
162            TypeKind[] argtypes = { a1, a2, a3 };
163            ArrayList<TypeKind> classes = new ArrayList<>();
164            for (int i = 0 ; i < mck.arity ; i ++ ) {
165                if (!argtypes[i].isInterface) {
166                    classes.add(argtypes[i]);
167                }
168            }
169            boolean glb_exists = true;
170            for (TypeKind arg_i : classes) {
171                glb_exists = true;
172                for (TypeKind arg_j : classes) {
173                    if (!arg_i.isSubtypeof(arg_j)) {
174                        glb_exists = false;
175                        break;
176                    }
177                }
178                if (glb_exists) break;
179            }
180            errorExpected = !glb_exists;
181        }
182
183        if (errorExpected != diagChecker.errorFound) {
184            throw new Error("invalid diagnostics for source:\n" +
185                source.getCharContent(true) +
186                "\nFound error: " + diagChecker.errorFound +
187                "\nExpected error: " + errorExpected);
188        }
189    }
190
191    static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
192
193        boolean errorFound;
194
195        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
196            if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
197                errorFound = true;
198            }
199        }
200    }
201}
202