contentcontainerhandler.java

国外的j2me播放器软件

package no.auc.one.portableplayer.communication.mediaserver;

import org.xml.sax.*;
import org.xml.sax.helpers.*;
import javax.xml.parsers.*;
import java.util.*;

import no.auc.one.portableplayer.librarymanager.*;

public class ContentContainerHandler extends DefaultHandler 
                                     implements BrowseResultParser
{
    private Vector content = new Vector();
    private Stack tagStack = new Stack();

    private int totalMatches = 0;
    private int numberReturned = 0;
    
    public void startElement(
        String uri, 
        String localName, 
        String qName, 
        Attributes attributes) throws SAXException 
    {
    	if(qName.equals("item")) {
    		String trackID = attributes.getValue("id");
    		String parentID = attributes.getValue("parentID");

    		TrackInformation ti = new TrackInformation();
    		
    		ti.setObjectID(trackID);
    		ti.setParentID(parentID);
    		
    		content.addElement(ti);
    	} else if (qName.equals("res")) {
            if (content.lastElement() instanceof TrackInformation) {
                TrackInformation ti = (TrackInformation)content.lastElement();
    		    // XXX ERROR ti.setResourceSize(Long.parseLong(attributes.getValue("size")));
    		    ti.setDuration(attributes.getValue("duration"));
            }
    	} else if(qName.equals("container")) {
    		String containerID = attributes.getValue("id");
    		String parentID = attributes.getValue("parentID");
    		int numberOfElements = Integer.parseInt(
                attributes.getValue("childCount"));
    		
            ContentContainer cc = new ContentContainer();
    		cc.setObjectID(containerID);
    		cc.setParentID(parentID);
    		// XXX cc.setNumberReturned(numberOfElements);
    		content.addElement(cc);
    	}
    	tagStack.push(qName);
    }
    
	public void characters(char[] ch, int start, int length) throws SAXException {
		String chars = new String(ch, start, length).trim();
		if(chars.length() > 0) {
			String qName = (String)tagStack.peek();
            
			if (qName.equals("dc:title")) {
			    MediaContent current = (MediaContent)content.lastElement();
				current.setName(chars);
			} else if (qName.equals("res")) {
			    MediaContent current = (MediaContent)content.lastElement();
                current.setResourceUri(chars);
            } else if (content.lastElement() instanceof TrackInformation) {
                TrackInformation current = (TrackInformation)content.lastElement();
                
			    if (qName.equals("upnp:artist")){
				    current.setArtist(chars);
			    } else if (qName.equals("upnp:album")){
				    current.setAlbum(chars);
			    } else if (qName.equals("upnp:genre")){
				    current.setGenre(chars);
			    } else if (qName.equals("upnp:genre")){
				    current.setGenre(chars);
			    }
            }
		}
	}
	
	public void endElement(String uri, String localName, String qName) throws SAXException {
		tagStack.pop();
	}
	
	public MediaContent[] getMediaContent(){
		MediaContent[] mc = new MediaContent[content.size()];
        content.copyInto(mc);
        
        return mc;
	}    

    public void setNumberReturned(int number) {
        numberReturned = number;
    }

    public int getNumberReturned() {
        return numberReturned;
    }

    public void setTotalMatches(int number) {
         totalMatches = number;
    }

    public int getTotalMatches() {
        return totalMatches;
    }
}