syncmlcanonizer.java

实现了SyncML无线同步协议

/**
 * Copyright (C) 2003-2004 Funambol
 *
 *  This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the 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 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 General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */

package sync4j.server;

import java.io.Serializable;
import java.util.logging.Logger;
import java.util.logging.Level;

import sync4j.framework.logging.Sync4jLogger;

import sync4j.framework.core.SyncML;
import sync4j.framework.core.Sync4jException;

import org.apache.commons.lang.StringUtils;

/** 
 * This class is used for transformer the message in the canonical form.
 *
 */
public class SyncMLCanonizer implements Serializable {

    // ------------------------------------------------------------ Private data
    private static final Logger log = Sync4jLogger.getLogger("engine");
    
    // ------------------------------------------------------------ Constructors
    public SyncMLCanonizer() {
    }

    // ---------------------------------------------------------- Public methods
    
    /**
     * The message input must be canonized every time before call the XML-Java 
     * mapping tool (JiBX) that it parsers and generates the SyncML object.
     *
     * @param message the input XML message
     *
     * @return message the input XML message canonized
     **/
    public String canonize(String message) {
        if (log.isLoggable(Level.FINE)) {
            log.fine("Starting process of canonization");
        }
        
        return message;
    }
    
    /**
     * Remove all namespace from the message.
     *
     * @param message the original message xml
     *
     */
    public String removeNamespaces(String message) {
        String[] ns = new String[9];
        ns[0] = " xmlns=\"syncml:metinf\"" ;
        ns[1] = " xmlns='syncml:metinf'"   ;
        ns[2] = " xmlns=\"syncml:devinf\"" ;
        ns[3] = " xmlns='syncml:devinf'"   ;
        ns[4] = " xmlns=\"syncml:devinf\"" ;
        ns[5] = " xmlns='SYNCML:SYNCML1.0'";
        ns[6] = " xmlns=\"SYNCML:SYNCML1.0\"";
        ns[7] = " xmlns='SYNCML:SYNCML1.1'";
        ns[8] = " xmlns=\"SYNCML:SYNCML1.1\"";
        
        for (int i=0; i<ns.length; i++) {
            message = StringUtils.replace(message, ns[i], "");
        }
        
        return message;
    }    
    
    /**
     * Replace into message the '&' with "&amp;"
     *
     * @param message the original message xml
     *
     * @return message the message updated
     */
    public String replaceEntity(String message) {
        return StringUtils.replace(message, "&", "&amp;");
    }
}