otaconfigmessageparser.java

SyncML的java实现类库 funambol公司发布的

/*
 * Copyright (C) 2006-2007 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 com.funambol.syncml.client;

import com.funambol.util.Log;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;


/**
 * Message Listener for messages carring configuration messages (Config)
 */
public class OTAConfigMessageParser {
    
    // Definitions for the section types sent by the server
    OTAConfigMessage message = new OTAConfigMessage();

    private String[] remoteURIs;
    // Number of configurable sources
        
    /**
     * Creates a new instance of OTAConfigMessageParser
     */
    public OTAConfigMessageParser() {
        Log.info(this, "OTAConfigMessageParser for OTA Configuration Binary Message");
        remoteURIs = new String[OTAConfigMessage.SOURCE_NUMBER];
    }
    
    /**
     * This is the main parse method. It reads the incoming message
     * and store the informations in the instance attributes.
     * @return OTAConfigMessage Object handling properties from 
     * OTA Configuration message
     */
    public OTAConfigMessage parseMessage(byte[] msg) throws IOException, MessageParserException {
        /*
         * To be used with real messages to cut headers
         **/
        int byteToBeParsed = msg.length-6;
        byte[] msgToBeParsed = new byte[byteToBeParsed];
        System.arraycopy(msg, 6, msgToBeParsed, 0, byteToBeParsed);
        
        //parse message and write configuration parameters
        ByteArrayInputStream bin = new ByteArrayInputStream(msgToBeParsed);
        
        //ByteArrayInputStream bin = new ByteArrayInputStream(msg);
        DataInputStream din = new DataInputStream(bin);
        int sections = 0;
        
        while (din.available() != 0) {
            parseSection(din);
            sections++;
        }
        message.setRemoteURIs(this.remoteURIs);
        return message;
    }
    
    /**
     * Parse Message Sections.
     * Sets the instance attributes accordingly.
     */
    private int parseSection(DataInputStream din) throws IOException, MessageParserException {
        String localUri = null;
        int type = getSectionType(din);

        String remoteUri;
        String format;
        
        switch(type) {
            case OTAConfigMessage.SYNCML:
                message.setSyncUrl(getSectionField(din));
                message.setUserName(getSectionField(din));
                message.setPassword(getSectionField(din));
                break;
            case OTAConfigMessage.MAIL:
                remoteURIs[OTAConfigMessage.MAIL-2] = getSectionField(din);
                message.setVisibleName(getSectionField(din));
                message.setMailAddress(getSectionField(din));
                break;
            case OTAConfigMessage.CONTACT:
                remoteURIs[OTAConfigMessage.CONTACT-2] = getSectionField(din);
                format = getSectionField(din);      // Not used on j2me clients
                break;
            case OTAConfigMessage.CALENDAR:
                remoteURIs[OTAConfigMessage.CALENDAR-2] = getSectionField(din);
                format = getSectionField(din);      // Not used on j2me clients
                break;
            case OTAConfigMessage.TASK:
                remoteURIs[OTAConfigMessage.TASK-2] = getSectionField(din);
                format = getSectionField(din);      // Not used on j2me clients
                break;
            case OTAConfigMessage.NOTE:
                remoteURIs[OTAConfigMessage.NOTE-2] = getSectionField(din);
                //Open Point: localUri may not be assigned by server
                //localUri = getSectionField(din);
                break;
            case OTAConfigMessage.BRIEFCASE:
                remoteURIs[OTAConfigMessage.BRIEFCASE-2] = getSectionField(din);
                //Open Point: localUri may not be assigned by server
                //localUri = getSectionField(din);
                break;
            default:
                //throw new MessageParserException("Illegal Message Parsed");
                break;
        }
        return type;
    }
    
    /**
     * Retrieve Section Type.
     * @return  Section Type as an int
     */
    private int getSectionType(DataInputStream din) throws IOException {
        int type = din.readByte()&0xff;
        return type;
    }
    
    /**
     * Retrieve Field value.
     * @return  Field value as a String
     */
    private String getSectionField(DataInputStream din) throws IOException{
        //Get field Length
        int length = din.readByte()&0xff;
        
        if (length == 0) {
            return null;
        }
        
        byte[] tmp = new byte[length];
        din.read(tmp, 0, length);
        
        return new String(tmp);
    }


    
    
    
}