Java(TM) Boutique - Creating Content and Protocol Handlers in Java, Part 2

Listing 4: xyURLConnection.java

import java.net.*; 
import java.io.*;
import java.awt.*;
import java.awt.image.*;

/*
//the createURLStreamHandler method returns a protocol handler
//in this case the xy protocol handler
class PersonalStreamHandlerFactory implements URLStreamHandlerFactory { 
    public URLStreamHandler createURLStreamHandler(String protocol) { 
        if (protocol.equalsIgnoreCase("xy")) 
            {
            //return new sun.net.www.protocol.xy.Handler();
            return new Handler(); 
            }
            else 
                return null; 
    } 
} 
*/

class drawIMGph extends Frame{
   
   Image IMG;
   
   public drawIMGph(String title)
     {
     super(title);
     }
     
   public void init(MemoryImageSource mis)
      {
      IMG=createImage(mis);
      setSize(IMG.getWidth(this)+50,IMG.getHeight(this)+50);
      setVisible(true);
      }
   
    public void paint(Graphics g)
    {
    g.drawImage(IMG,45,40,this);
    }
}


class TestProtocolHandler{  
    public static void main(String argv[]) throws Exception{ 
    
    //setting "manualy" the xy protocol handler
   //URL.setURLStreamHandlerFactory(new PersonalStreamHandlerFactory()); 

    //as you can see the URL is specific to the xy protocol handler
    URL url=new URL("xy:X//localhost/image.xy");                        
             
    //getting the resource content
    MemoryImageSource mis=(MemoryImageSource)url.getContent();
        
    drawIMGph t=new drawIMGph("Protocol Handler");  
    t.init(mis);
    }
}

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