/*

 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 7086601

 * @summary Error message bug: cause for method mismatch is 'null'

 */

import com.sun.source.util.JavacTask;

import java.net.URI;

import java.util.Arrays;

import java.util.ArrayList;

import javax.tools.Diagnostic;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

public class T7086601b {

    static int checkCount = 0;

    enum TypeKind {

        STRING("String", false),

        INTEGER("Integer", false),

        NUMBER("Number", false),

        SERIALIZABLE("java.io.Serializable", true),

        CLONEABLE("Cloneable", true),

        X("X", false),

        Y("Y", false),

        Z("Z", false);

        String typeStr;

        boolean isInterface;

        private TypeKind(String typeStr, boolean isInterface) {

            this.typeStr = typeStr;

            this.isInterface = isInterface;

        }

        boolean isSubtypeof(TypeKind other) {

            return (this == INTEGER && other == NUMBER ||

                    this == Z && other == Y ||

                    this == other);

        }

    }

    enum MethodCallKind {

        ARITY_ONE("m(a1);", 1),

        ARITY_TWO("m(a1, a2);", 2),

        ARITY_THREE("m(a1, a2, a3);", 3);

        String invokeString;

        int arity;

        private MethodCallKind(String invokeString, int arity) {

            this.invokeString = invokeString;

            this.arity = arity;

        }

    }

    public static void main(String... args) throws Exception {

        //create default shared JavaCompiler - reused across multiple compilations

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

        StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);

        for (TypeKind a1 : TypeKind.values()) {

            for (TypeKind a2 : TypeKind.values()) {

                for (TypeKind a3 : TypeKind.values()) {

                    for (MethodCallKind mck : MethodCallKind.values()) {

                        new T7086601b(a1, a2, a3, mck).run(comp, fm);

                    }

                }

            }

        }

        System.out.println("Total check executed: " + checkCount);

    }

    TypeKind a1;

    TypeKind a2;

    TypeKind a3;

    MethodCallKind mck;

    JavaSource source;

    DiagnosticChecker diagChecker;

    T7086601b(TypeKind a1, TypeKind a2, TypeKind a3, MethodCallKind mck) {

        this.a1 = a1;

        this.a2 = a2;

        this.a3 = a3;

        this.mck = mck;

        this.source = new JavaSource();

        this.diagChecker = new DiagnosticChecker();

    }

    class JavaSource extends SimpleJavaFileObject {

        final String bodyTemplate = "import java.util.List;\n"+

                              "class Test {\n" +

                              "   <Z> void m(List<? super Z> l1) { }\n" +

                              "   <Z> void m(List<? super Z> l1, List<? super Z> l2) { }\n" +

                              "   <Z> void m(List<? super Z> l1, List<? super Z> l2, List<? super Z> l3) { }\n" +

                              "   <X,Y,Z extends Y> void test(List<#A1> a1, List<#A2> a2, List<#A3> a3) { #MC } }";

        String source;

        public JavaSource() {

            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

            source = bodyTemplate.replace("#A1", a1.typeStr)

                             .replace("#A2", a2.typeStr).replace("#A3", a3.typeStr)

                             .replace("#MC", mck.invokeString);

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

    void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {

        JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,

                null, null, Arrays.asList(source));

        try {

            ct.analyze();

        } catch (Throwable ex) {

            throw new AssertionError("Error thron when compiling the following code:\n" + source.getCharContent(true));

        }

        check();

    }

    void check() {

        checkCount++;

        boolean errorExpected = false;

        if (mck.arity > 1) {

            TypeKind[] argtypes = { a1, a2, a3 };

            ArrayList<TypeKind> classes = new ArrayList<>();

            for (int i = 0 ; i < mck.arity ; i ++ ) {

                if (!argtypes[i].isInterface) {

                    classes.add(argtypes[i]);

                }

            }

            boolean glb_exists = true;

            for (TypeKind arg_i : classes) {

                glb_exists = true;

                for (TypeKind arg_j : classes) {

                    if (!arg_i.isSubtypeof(arg_j)) {

                        glb_exists = false;

                        break;

                    }

                }

                if (glb_exists) break;

            }

            errorExpected = !glb_exists;

        }

        if (errorExpected != diagChecker.errorFound) {

            throw new Error("invalid diagnostics for source:\n" +

                source.getCharContent(true) +

                "\nFound error: " + diagChecker.errorFound +

                "\nExpected error: " + errorExpected);

        }

    }

    static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {

        boolean errorFound;

        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {

            if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {

                errorFound = true;

            }

        }

    }

}