/*

 * Copyright (c) 2010, 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 6863465

 * @summary  javac doesn't detect circular subclass dependencies via qualified names

 * @run main TestCircularClassfile

 */

import java.io.*;

import java.net.URI;

import java.util.Arrays;

import javax.tools.Diagnostic;

import javax.tools.DiagnosticListener;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.ToolProvider;

import com.sun.source.util.JavacTask;

import java.util.EnumSet;

public class TestCircularClassfile {

    enum ClassName {

        A("A"),

        B("B"),

        C("C"),

        OBJECT("Object");

        String name;

        ClassName(String name) {

            this.name = name;

        }

    }

    static class JavaSource extends SimpleJavaFileObject {

        final static String sourceStub = "class #C extends #S {}";

        String source;

        public JavaSource(ClassName clazz, ClassName sup) {

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

            source = sourceStub.replace("#C", clazz.name).replace("#S", sup.name);

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

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

        int count = 0;

        for (ClassName clazz : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {

            for (ClassName sup : EnumSet.of(ClassName.A, ClassName.B, ClassName.C)) {

                if (sup.ordinal() < clazz.ordinal()) continue;

                check("sub_"+count++, clazz, sup);

            }

        }

    }

    static JavaSource[] initialSources = new JavaSource[] {

            new JavaSource(ClassName.A, ClassName.OBJECT),

            new JavaSource(ClassName.B, ClassName.A),

            new JavaSource(ClassName.C, ClassName.B)

        };

    static String workDir = System.getProperty("user.dir");

    static void check(String destPath, ClassName clazz, ClassName sup) throws Exception {

        File destDir = new File(workDir, destPath); destDir.mkdir();

        final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();

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

                Arrays.asList("-d", destPath), null, Arrays.asList(initialSources));

        ct.generate();

        File fileToRemove = new File(destPath, clazz.name + ".class");

        fileToRemove.delete();

        JavaSource newSource = new JavaSource(clazz, sup);

        DiagnosticChecker checker = new DiagnosticChecker();

        ct = (JavacTask)tool.getTask(null, null, checker,

                Arrays.asList("-cp", destPath), null, Arrays.asList(newSource));

        ct.analyze();

        if (!checker.errorFound) {

            throw new AssertionError(newSource.source);

        }

    }

    static class DiagnosticChecker implements DiagnosticListener<JavaFileObject> {

        boolean errorFound = false;

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

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

                    diagnostic.getCode().equals("compiler.err.cyclic.inheritance")) {

                errorFound = true;

            }

        }

    }

}