StreamReaderFactory.java

/*
 * Funambol is a mobile platform developed by Funambol, Inc. 
 * Copyright (C) 2003 - 2007 Funambol, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission 
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY FUNAMBOL, FUNAMBOL DISCLAIMS THE 
 * WARRANTY OF NON INFRINGEMENT  OF THIRD PARTY RIGHTS.
 * 
 * This program 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 for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License 
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 * 
 * You can contact Funambol, Inc. headquarters at 643 Bair Island Road, Suite 
 * 305, Redwood City, CA 94063, USA, or at email address info@funambol.com.
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "Powered by Funambol" logo. If the display of the logo is not reasonably 
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by Funambol".
 */

package com.funambol.util;

/**
 * Factory Class: return StreamReader objects
 */
public class StreamReaderFactory {
    
    private static GzipStreamReader gzipStreamReader;
    private static SimpleStreamReader simpleStreamReader;
    
    /**
     * Default Constructor
     */
    private StreamReaderFactory() {
    }
    
    /**
     * Factory method for object implementig <code>StreamReader</code> interface 
     * @param type is the type of reader to be returned
     * @return StreamReader Object
     */
    public static StreamReader getStreamReader(String type) {
        if (type != null) {
            if (StringUtil.equalsIgnoreCase(type, "gzip")) {
                if (gzipStreamReader==null) {
                    gzipStreamReader = new GzipStreamReader();    
                } 
                return gzipStreamReader;
            } else if (StringUtil.equalsIgnoreCase(type, "deflate")) {
                return null;
            }
            //put here other StreamReaders;
        } else {
            if (simpleStreamReader==null) {
                simpleStreamReader = new SimpleStreamReader();
            }
            return simpleStreamReader;
        }
        return null;
    }
}