/*

 * Copyright (c) 2013, 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

 * @run main/timeout=600 TestNormal

 * @bug 8020802

 * @summary Need an ability to create jar files that are invariant to the pack200 packing/unpacking

 * @author Alexander Zuev

 */

import java.io.*;

import java.util.Collections;

import java.util.Properties;

import java.util.jar.JarEntry;

import java.util.jar.JarFile;

public class TestNormal {

    private static String FS = File.separator;

    public static void main(String args[]) throws Exception {

        Properties p = System.getProperties();

        String java_home = p.getProperty("test.jdk");

        String dtjar = java_home + File.separator + "lib"

                + File.separator + "dt.jar";

        File folder = new File("dt");

        if (folder.exists()) {

            delete(folder);

        }

        folder.mkdir();

        try {

            extractJar(new JarFile(dtjar), folder);

            execJavaCommand(java_home, "jar cnf normalized.jar -C dt .");

            execJavaCommand(java_home, "jar cf original.jar -C dt .");

            execJavaCommand(java_home, "pack200 -r repacked.jar original.jar");

            compareJars(new JarFile("normalized.jar"), new JarFile("repacked.jar"));

        } finally {

            String[] cleanupList = {"dt", "normalized.jar", "original.jar", "repacked.jar"};

            for (String s : cleanupList) {

                delete(new File(s));

            }

        }

    }

    public static void execJavaCommand(String java_home, String cmd) throws Exception {

        Process proc = Runtime.getRuntime().exec(java_home + FS + "bin" + FS + cmd);

        String s;

        BufferedReader stdInput =

                new BufferedReader(new InputStreamReader(proc.getInputStream()));

        BufferedReader stdError =

                new BufferedReader(new InputStreamReader(proc.getErrorStream()));

        while ((s = stdInput.readLine()) != null) {

            System.out.println(s);

        }

        while ((s = stdError.readLine()) != null) {

            System.err.println(s);

        }

    }

    public static void compareJars(JarFile jf1, JarFile jf2) throws Exception {

        try {

            if (jf1.size() != jf2.size()) {

                throw new Exception("Jars " + jf1.getName() + " and " + jf2.getName()

                        + " have different number of entries");

            }

            for (JarEntry elem1 : Collections.list(jf1.entries())) {

                JarEntry elem2 = jf2.getJarEntry(elem1.getName());

                if (elem2 == null) {

                    throw new Exception("Element " + elem1.getName() + " is missing from " + jf2.getName());

                }

                if (!elem1.isDirectory() && elem1.getCrc() != elem2.getCrc()) {

                    throw new Exception("The crc of " + elem1.getName() + " is different.");

                }

            }

        } finally {

            jf1.close();

            jf2.close();

        }

    }

    public static void extractJar(JarFile jf, File where) throws Exception {

        for (JarEntry file : Collections.list(jf.entries())) {

            File out = new File(where, file.getName());

            if (file.isDirectory()) {

                out.mkdirs();

                continue;

            }

            File parent = out.getParentFile();

            if (parent != null && !parent.exists()) {

                parent.mkdirs();

            }

            InputStream is = null;

            OutputStream os = null;

            try {

                is = jf.getInputStream(file);

                os = new FileOutputStream(out);

                while (is.available() > 0) {

                    os.write(is.read());

                }

            } finally {

                if (is != null) {

                    is.close();

                }

                if (os != null) {

                    os.close();

                }

            }

        }

    }

    static void delete(File f) throws IOException {

        if (!f.exists()) {

            return;

        }

        if (f.isDirectory()) {

            for (File c : f.listFiles()) {

                delete(c);

            }

        }

        if (!f.delete()) {

            throw new FileNotFoundException("Failed to delete file: " + f);

        }

    }

}