//#condition MUJMAIL_FS/*MujMail - Simple mail client for J2MECopyright (C) 2008 David Hauzar <david.hauzar.mujmail@gmail.com>This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */package mujmail.jsr_75;import mujmail.Properties;/** * Static class used to get dynamically loaded instances of filesystem classes. * If the JSR75 is be found, the class using wrapping JSR75 objects will be  * received, if not, it will be received the class with dummy methods. * For explanation of this mechanism, see documetation of package mujmail.jsr_75. *  * @author David Hauzar */public class FilesystemFactory {        /** Singleton static class. */    private FilesystemFactory() {};    /**     * Gets file connection object. Dynamically loads either the object using     * JSR 75 or dummy object.     * @param FileURL the url used for the connection     * @param flag Connector.READ, Connector.WRITE, Connector.READ_WRITE     * @return the file connection object     */    public static MyFileConnection getFileConnection(String FileURL, int flag) throws Exception {        MyFileConnection connection = getFConnection();                connection.initialize(FileURL, flag);        return connection;    }        /**     * Gets file connection object. Dynamically loads either the object using     * JSR 75 or dummy object.     * @param FileURL the url used for the connection     * @return the file connection object     * @throws java.lang.Exception     */    public static MyFileConnection getFileConnection(String FileURL) throws Exception {        MyFileConnection connection = getFConnection();        connection.initialize(FileURL);        return connection;    }        private static MyFileConnection getFConnection() throws Exception {        // TODO: ?? why does not work this?        //MyFileConnection connection = (MyFileConnection) getFileSystemObject("mujmail.jsr_75.MyFileConnectionJSR", "mujmail.jsr_75.MyFileConnectionDummy");                Class cl;        if (Properties.JSR75Available()) {            cl = Class.forName("mujmail.jsr_75.MyFileConnectionJSR");        } else {            cl = Class.forName("mujmail.jsr_75.MyFileConnectionDummy");        }        MyFileConnection connection = (MyFileConnection) cl.newInstance();        return connection;    }        /**     * Gets file system registry object. Dynamically loads either the object using     * JSR 75 or dummy object.     * @return file system registry object     * @throws java.lang.Exception     */    public static MyFileSystemRegistry getFileSystemRegistry() throws Exception {        Class cl;        if (Properties.JSR75Available()) {            cl = Class.forName("mujmail.jsr_75.MyFileSystemRegistryJSR");        } else {            cl = Class.forName("mujmail.jsr_75.MyFileSystemRegistryDummy");        }        return (MyFileSystemRegistry) cl.newInstance();                // TODO: ?? why does not work this:        //return (MyFileSystemRegistry) getFileSystemObject("mujmail.jsr_75, "mujmail.jsr_75.MyFileSystemRegistryDummy");    }        /**     * Loads object of dynamically loaded class.     * TODO: Does not works.      * @param JSRClass     * @param DummyClass     * @return     * @throws java.lang.Exception     */    private static Object getFileSystemObject(String JSRClass, String DummyClass) throws Exception {        Class cl;        if (Properties.JSR75Available()) {            cl = Class.forName(JSRClass);        } else {            cl = Class.forName(DummyClass);        }        return cl.newInstance();    }}