.#avtransportservice.java.1.3

国外的j2me播放器软件

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

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

import no.auc.one.portableplayer.communication.*;
import no.auc.one.portableplayer.communication.soap.*;
import no.auc.one.portableplayer.utils.*;
import no.auc.one.portableplayer.librarymanager.*;

/**
 * For controlling a AV Transport Services, used by Media Renderers.
 */
public class AVTransportService extends UPnPService implements Cloneable {

    /**
     * Construct instance based on a UPnPService.
     */
    public AVTransportService(
        UPnPService service)
    {
        super(
            service.getServiceType(), 
            service.getServiceID(), 
            service.getScpdURL(), 
            service.getEventSubURL(), 
            service.getControlURL());
	}

    /**
     * Creates a clone of this class instance.
     *
     * @return Clone of this class instance.
     */
    public Object clone() {
        return new AVTransportService((UPnPService)this);
    }

    /**
	 * This method requests the AV Transport service to set the URI of the media 
     * to be played at the Media Renderer.
     *   
     * @param ti Track which shall be set to play.
	 * @return Returns the SOAP response 
	 * @throws IOException
	 */
    public String setAVTransportURI(TrackInformation ti) throws IOException {
        SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#SetAVTransportURI\"",
	            getControlURL());
        
        StringBuffer metadata = new StringBuffer();
        metadata.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n");
        metadata.append("<DIDL-Lite xmlns:dc=\"http://purl.org/dc/elements/1.1/\"");
        metadata.append("xmlns:upnp=\"urn:schemas-upnp-org:metadata-1-0/upnp/\" ");
        metadata.append("xmlns=\"urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/\">");
        metadata.append("<item id=\"0\" parentID=\"0\" restricted=\"1\">");
        metadata.append("<dc:creator>" + ti.getArtist() + "</dc:creator>");
        metadata.append("<dc:title>" + ti.getName() + "</dc:title>");
        metadata.append("<upnp:artist>" + ti.getArtist() + "</upnp:artist>");
        metadata.append("<upnp:album>" + ti.getAlbum() + "</upnp:album>");
        metadata.append("<upnp:genre>" + ti.getGenre() + "</upnp:genre>");
        metadata.append(
            "<res size=\"" + ti.getResourceSize() + "\" duration=\"" + 
            ti.getDuration() + "\" protocolInfo=\"http-get:*:audio/mpeg:*\">");
        metadata.append(ti.getResourceUri() + "</res>");
        metadata.append("<upnp:class>object.item.audioItem.musicTrack</upnp:class>"); // XXX
        metadata.append("</item>");
        metadata.append("</DIDL-Lite>");

        StringBuffer buffer = new StringBuffer();
        buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append(
            "<u:SetAVTransportURI xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("<CurrentURI>" + ti.getResourceUri() + "</CurrentURI>\r\n");
        buffer.append("<CurrentURIMetaData>");
        buffer.append(StringEscapeUtils.escapeXml(metadata.toString()));
        buffer.append("</CurrentURIMetaData>\r\n");
		buffer.append("</u:SetAVTransportURI>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#SetAVTransportURI\"");
        System.out.println("Response from SetAVTransportURI invoke: \r\n" + resp);
	        
        //XXX Should convert the response from the operation to an exception, if the response 
        //    is indeed exceptional. And change the method to be 'void' instead.
	    return resp;
	}

	/**
     * Request the Media Renderer to transition to Play mode, which will render the 
     * current URI of the device.
     * 
	 * @return SOAP response of the request
	 * @throws IOException
	 */
	public String play() throws IOException
	{
		SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#Play\"",
	            getControlURL());

	    StringBuffer buffer = new StringBuffer();
		//XXX buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\">\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append("<u:Play xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("<Speed>1</Speed>\r\n");
		buffer.append("</u:Play>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#Play\"");
        System.out.println("Response from Play invoke: \r\n" + resp);
	    
	    return resp;
	}
	
	
	/**
     * Request the Media Renderer to pause the current media. 
     *
	 * @return SOAP response of the request
	 * @throws IOException
	 */
	public String pause() throws IOException
	{
		
		SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#Pause\"",
	            getControlURL());

	    StringBuffer buffer = new StringBuffer();
		//XXX buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\">\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append("<u:Pause xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("</u:Pause>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#Pause\"");
        System.out.println("Response from Pause invoke: \r\n" + resp);
	    
	    return resp;
		
	}
	
	
	/**
     * Request the Media Renderer to stop playing the current media. 
     *
	 * @return SOAP response of the request
	 * @throws IOException
	 */
	public String stop() throws IOException
	{
		
	    SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#Stop\"",
	            getControlURL());

	    StringBuffer buffer = new StringBuffer();
		//XXX buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\">\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append("<u:Stop xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("</u:Stop>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#Stop\"");
        System.out.println("Response from Pause invoke: \r\n" + resp);
	    
	    return resp;
	}
	
	/**
     * Request the Media Renderer to play the next track. 
     *
	 * @return SOAP response of the request
	 * @throws IOException
	 */
	public String next() throws IOException
	{
		
	    SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#Next\"",
	            getControlURL());

	    StringBuffer buffer = new StringBuffer();
		//XXX buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\">\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append("<u:Next xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("</u:Next>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#Next\"");
        System.out.println("Response from Pause invoke: \r\n" + resp);
	    
	    return resp;
	}
	
	/**
     * Request the Media Renderer to stop play the previous track. 
     *
	 * @return SOAP response of the request
	 * @throws IOException
	 */
	public String previous() throws IOException
	{
		
	    SoapInvoke si = 
	        new SoapInvoke(
	            "\"urn:schemas-upnp-org:service:AVTransport:1#Previous\"",
	            getControlURL());

	    StringBuffer buffer = new StringBuffer();
		//XXX buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\">\r\n");
	    buffer.append(
            "<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" " + 
            "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">\r\n");
	    buffer.append("<s:Body>\r\n");
		buffer.append("<u:Previous xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">\r\n");
		buffer.append("<InstanceID>0</InstanceID>\r\n");
		buffer.append("</u:Previous>\r\n");
		buffer.append("</s:Body>\r\n");
		buffer.append("</s:Envelope>\r\n");

	    si.setBody(buffer.toString());

	    String resp = si.invoke(
	        "\"urn:schemas-upnp-org:service:AVTransport:1#Prevoius\"");
        System.out.println("Response from Pause invoke: \r\n" + resp);
	    
	    return resp;
	}
}