/*

 * Copyright (c) 1996, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package sun.tools.serialver;

import java.io.*;

import java.io.ObjectStreamClass;

import java.nio.file.Paths;

import java.text.MessageFormat;

import java.util.ResourceBundle;

import java.util.MissingResourceException;

import java.net.URLClassLoader;

import java.net.URL;

import java.net.MalformedURLException;

/**

 * Supporting class for the serialver tool.

 */

public class SerialVer {

    /*

     * A class loader that will load from the CLASSPATH environment

     * variable set by the user.

     */

    static URLClassLoader loader = null;

    /*

     * Create a URL class loader that will load classes from the

     * specified classpath.

     */

    static void initializeLoader(String cp) throws IOException {

        String[] paths = cp.split(File.pathSeparator);

        int count = paths.length;

        URL[] urls = new URL[count];

        for (int i = 0; i < count; i++) {

            urls[i] = Paths.get(paths[i]).toUri().toURL();

        }

        loader = new URLClassLoader(urls);

    }

    /*

     * From the classname find the serialVersionUID string formatted

     * for to be copied to a java class.

     */

    static String serialSyntax(String classname) throws ClassNotFoundException {

        String ret = null;

        boolean classFound = false;

        // If using old style of qualifyling inner classes with '$'s.

        if (classname.indexOf('$') != -1) {

            ret = resolveClass(classname);

        } else {

            /* Try to resolve the fully qualified name and if that fails, start

             * replacing the '.'s with '$'s starting from the last '.', until

             * the class is resolved.

             */

            try {

                ret = resolveClass(classname);

                classFound = true;

            } catch (ClassNotFoundException e) {

                /* Class not found so far */

            }

            if (!classFound) {

                StringBuilder workBuffer = new StringBuilder(classname);

                String workName = workBuffer.toString();

                int i;

                while ((i = workName.lastIndexOf('.')) != -1 && !classFound) {

                    workBuffer.setCharAt(i, '$');

                    try {

                        workName = workBuffer.toString();

                        ret = resolveClass(workName);

                        classFound = true;

                    } catch (ClassNotFoundException e) {

                        /* Continue searching */

                    }

                }

            }

            if (!classFound) {

                throw new ClassNotFoundException();

            }

        }

        return ret;

    }

    static String resolveClass(String classname) throws ClassNotFoundException {

        Class<?> cl = Class.forName(classname, false, loader);

        ObjectStreamClass desc = ObjectStreamClass.lookup(cl);

        if (desc != null) {

            return "    private static final long serialVersionUID = " +

                desc.getSerialVersionUID() + "L;";

        } else {

            return null;

        }

    }

    /**

     * Entry point for serialver tool.

     * @param args the arguments

     */

    public static void main(String[] args) {

        String envcp = null;

        int i = 0;

        if (args.length == 0) {

            usage();

            System.exit(1);

        }

        for (i = 0; i < args.length; i++) {

            if (args[i].equals("-classpath")) {

                if ((i+1 == args.length) || args[i+1].startsWith("-")) {

                    System.err.println(Res.getText("error.missing.classpath"));

                    usage();

                    System.exit(1);

                }

                envcp = new String(args[i+1]);

                i++;

            }  else if (args[i].startsWith("-")) {

                System.err.println(Res.getText("invalid.flag", args[i]));

                usage();

                System.exit(1);

            } else {

                break;          // drop into processing class names

            }

        }

        /*

         * Get user's CLASSPATH environment variable, if the -classpath option

         * is not defined, and make a loader that can read from that path.

         */

        if (envcp == null) {

            envcp = System.getProperty("env.class.path");

            /*

             * If environment variable not set, add current directory to path.

             */

            if (envcp == null) {

                envcp = ".";

            }

        }

        try {

            initializeLoader(envcp);

        } catch (MalformedURLException mue) {

            System.err.println(Res.getText("error.parsing.classpath", envcp));

            System.exit(2);

        } catch (IOException ioe) {

            System.err.println(Res.getText("error.parsing.classpath", envcp));

            System.exit(3);

        }

        /*

         * Check if there are any class names specified

         */

        if (i == args.length) {

            usage();

            System.exit(1);

        }

        /*

         * The rest of the parameters are classnames.

         */

        boolean exitFlag = false;

        for (i = i; i < args.length; i++ ) {

            try {

                String syntax = serialSyntax(args[i]);

                if (syntax != null)

                    System.out.println(args[i] + ":" + syntax);

                else {

                    System.err.println(Res.getText("NotSerializable",

                        args[i]));

                    exitFlag = true;

                }

            } catch (ClassNotFoundException cnf) {

                System.err.println(Res.getText("ClassNotFound", args[i]));

                exitFlag = true;

            }

        }

        if (exitFlag) {

            System.exit(1);

        }

    }

    /**

     * Usage

     */

    public static void usage() {

        System.err.println(Res.getText("usage"));

    }

}

/**

 * Utility for integrating with serialver and for localization.

 * Handle Resources. Access to error and warning counts.

 * Message formatting.

 *

 * @see java.util.ResourceBundle

 * @see java.text.MessageFormat

 */

class Res {

    private static ResourceBundle messageRB;

    /**

     * Initialize ResourceBundle

     */

    static void initResource() {

        try {

            messageRB =

                ResourceBundle.getBundle("sun.tools.serialver.resources.serialver");

        } catch (MissingResourceException e) {

            throw new Error("Fatal: Resource for serialver is missing");

        }

    }

    /**

     * get and format message string from resource

     *

     * @param key selects message from resource

     */

    static String getText(String key) {

        return getText(key, (String)null);

    }

    /**

     * get and format message string from resource

     *

     * @param key selects message from resource

     * @param a1 first argument

     */

    static String getText(String key, String a1) {

        return getText(key, a1, null);

    }

    /**

     * get and format message string from resource

     *

     * @param key selects message from resource

     * @param a1 first argument

     * @param a2 second argument

     */

    static String getText(String key, String a1, String a2) {

        return getText(key, a1, a2, null);

    }

    /**

     * get and format message string from resource

     *

     * @param key selects message from resource

     * @param a1 first argument

     * @param a2 second argument

     * @param a3 third argument

     */

    static String getText(String key, String a1, String a2, String a3) {

        if (messageRB == null) {

            initResource();

        }

        try {

            String message = messageRB.getString(key);

            return MessageFormat.format(message, a1, a2, a3);

        } catch (MissingResourceException e) {

            throw new Error("Fatal: Resource for serialver is broken. There is no " + key + " key in resource.");

        }

    }

}