/*

 * Copyright (c) 2011, 2015, 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 7031005

 * @summary javap prints "extends java.lang.Object"

 * @modules jdk.jdeps

 */

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.net.URI;

import java.util.Arrays;

import javax.tools.JavaCompiler;

import javax.tools.JavaCompiler.CompilationTask;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.StandardLocation;

import javax.tools.ToolProvider;

public class TestSuperclass {

    enum ClassKind {

        CLASS("class"),

        INTERFACE("interface");

        ClassKind(String keyword) {

            this.keyword = keyword;

        }

        final String keyword;

    }

    enum GenericKind {

        NO(""),

        YES("<T>");

        GenericKind(String typarams) {

            this.typarams = typarams;

        }

        final String typarams;

    }

    enum SuperKind {

        NONE(null),

        SUPER("Super");

        SuperKind(String name) {

            this.name = name;

        }

        String extend() {

            return (name == null) ? "" : "extends " + name;

        }

        String decl(ClassKind ck) {

            return (name == null) ? "" : ck.keyword + " " + name + " { }";

        }

        final String name;

    }

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

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

            int errors = 0;

            for (ClassKind ck: ClassKind.values()) {

                for (GenericKind gk: GenericKind.values()) {

                    for (SuperKind sk: SuperKind.values()) {

                        errors += new TestSuperclass(ck, gk, sk).run(comp, fm);

                    }

                }

            }

            if (errors > 0)

                throw new Exception(errors + " errors found");

        }

    }

    final ClassKind ck;

    final GenericKind gk;

    final SuperKind sk;

    TestSuperclass(ClassKind ck, GenericKind gk, SuperKind sk) {

        this.ck = ck;

        this.gk = gk;

        this.sk = sk;

    }

    int run(JavaCompiler comp, StandardJavaFileManager fm) throws IOException {

        System.err.println("test: ck:" + ck + " gk:" + gk + " sk:" + sk);

        File testDir = new File(ck + "-" + gk + "-" + sk);

        testDir.mkdirs();

        fm.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(testDir));

        JavaSource js = new JavaSource();

        System.err.println(js.getCharContent(false));

        CompilationTask t = comp.getTask(null, fm, null, null, null, Arrays.asList(js));

        if (!t.call())

            throw new Error("compilation failed");

        File testClass = new File(testDir, "Test.class");

        String out = javap(testClass);

        // Extract class sig from first line of Java source

        String expect = js.source.replaceAll("(?s)^(.* Test[^{]+?) *\\{.*", "$1");

        // Extract class sig from line from javap output

        String found = out.replaceAll("(?s).*\n(.* Test[^{]+?) *\\{.*", "$1");

        checkEqual("class signature", expect, found);

        return errors;

    }

    String javap(File file) {

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        String[] args = { file.getPath() };

        int rc = com.sun.tools.javap.Main.run(args, pw);

        pw.close();

        String out = sw.toString();

        if (!out.isEmpty())

            System.err.println(out);

        if (rc != 0)

            throw new Error("javap failed: rc=" + rc);

        return out;

    }

    void checkEqual(String label, String expect, String found) {

        if (!expect.equals(found))

            error("Unexpected " + label + " found: '" + found + "', expected: '" + expect + "'");

    }

    void error(String msg) {

        System.err.println("Error: " + msg);

        errors++;

    }

    int errors;

    class JavaSource extends SimpleJavaFileObject {

        static final String template =

                  "#CK Test#GK #EK { }\n"

                + "#SK\n";

        final String source;

        public JavaSource() {

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

            source = template

                    .replace("#CK", ck.keyword)

                    .replace("#GK", gk.typarams)

                    .replace("#EK", sk.extend())

                    .replace("#SK", sk.decl(ck));

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

}