/*

 * 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 6917288

 * @summary Unnamed nested class is not generated

 */

import java.io.*;

import java.util.*;

public class T6917288 {

    // refers to kind of reference to an anon inner class that may be generated

    enum Kind { NONE, FALSE, TRUE, ALWAYS };

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

        new T6917288().run();

    }

    void run() throws Exception {

        for (Kind k: Kind.values()) {

            test(k);

        }

        if (errors > 0)

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

    }

    /**

     *  Run a test case for Kind k.

     */

    void test(Kind k) throws Exception {

        System.err.println("Test " + (++count) + ": " + k);

        File testDir = new File("test" + count);

        File srcDir = new File(testDir, "src");

        srcDir.mkdirs();

        File classesDir = new File(testDir, "classes");

        classesDir.mkdirs();

        List<String> opts = new ArrayList<String>();

        opts.add("-d");

        opts.add(classesDir.getPath());

        File f = writeFile(srcDir, k);

        int rc = compile(opts, f);

        if (rc != 0) {

            error("compilation failed: rc=" + rc);

            return;

        }

        check(classesDir, "Test.class", "Test$Inner.class", "Test$1.class");

    }

    /**

     *  Compile files with given options.

     *  Display any output from compiler, and return javac return code.

     */

    int compile(List<String> opts, File... files) {

        List<String> args = new ArrayList<String>();

        args.addAll(opts);

        for (File f: files)

            args.add(f.getPath());

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        int rc = com.sun.tools.javac.Main.compile(args.toArray(new String[args.size()]), pw);

        pw.close();

        String out = sw.toString();

        if (out.length() > 0)

            System.err.println(out);

        return rc;

    }

    /**

     *  Check that a directory contains the expected files.

     */

    void check(File dir, String... paths) {

        Set<String> found = new TreeSet<String>(Arrays.asList(dir.list()));

        Set<String> expect = new TreeSet<String>(Arrays.asList(paths));

        if (found.equals(expect))

            return;

        for (String f: found) {

            if (!expect.contains(f))

                error("Unexpected file found: " + f);

        }

        for (String e: expect) {

            if (!found.contains(e))

                error("Expected file not found: " + e);

        }

    }

    /**

     *  Write source file for test case k.

     */

    File writeFile(File dir, Kind k) throws Exception {

        StringBuilder sb = new StringBuilder();

        sb.append("public class Test {\n");

        sb.append("    private Inner inner;\n");

        // generate different cases of an anon inner class

        if (k != Kind.NONE) {

            sb.append("    private void m() {\n");

            sb.append("        ");

            switch (k) {

                case FALSE: case TRUE:

                    sb.append("if (" + k.toString().toLowerCase() + ") ");

            }

            sb.append("new Runnable() { public void run() { } };\n");

            sb.append("    }\n");

        }

        sb.append("    private void init() {\n");

        sb.append("        inner = new Inner();\n");

        sb.append("    }\n");

        sb.append("\n");

        sb.append("    private static class Inner {\n");

        sb.append("        private Inner() {\n");

        sb.append("        }\n");

        sb.append("    }\n");

        sb.append("}\n");

        File f = new File(dir, "Test.java");

        FileWriter w = new FileWriter(f);

        w.write(sb.toString());

        w.close();

        return f;

    }

    /**

     *  Record an error message.

     */

    void error(String msg) {

        System.err.println(msg);

        errors++;

    }

    int count;

    int errors;

}