openurl.java

IBM AGLET平台下可让AGLET与浏览器进行交互的代码

package examples.openurl;

import com.ibm.aglet.*;
import com.ibm.agletx.util.SimpleItinerary;
import java.awt.*;
import java.net.URL;

// Referenced classes of package examples.openurl:
//            MyDialog

public class OpenURL extends Aglet
{

    transient Frame my_dialog;
    String url;
    String home;
    SimpleItinerary itinerary;

    public OpenURL()
    {
        my_dialog = null;
        url = "http://w3.trl.ibm.com";
        home = null;
        itinerary = null;
    }

    public void atHome(Message message)
    {
        setText("I'm back.");
        waitMessage(2000L);
        dispose();
    }

    public void dialog(Message message)
    {
        if(my_dialog == null)
        {
            my_dialog = new MyDialog(this);
            my_dialog.pack();
            my_dialog.setSize(my_dialog.getPreferredSize());
        }
        my_dialog.show();
    }

    public void go(Message message)
    {
        try
        {
            itinerary = new SimpleItinerary(this);
            itinerary.go((String)message.getArg("destination"), new Message("openURL", message.getArg("url")));
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
            dispose();
        }
    }

    public synchronized void goDestination(String s)
    {
        try
        {
            AgletProxy agletproxy = (AgletProxy)clone();
            Message message = new Message("go");
            message.setArg("url", url);
            message.setArg("destination", s);
            agletproxy.sendMessage(message);
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
        }
    }

    public boolean handleMessage(Message message)
    {
        if(message.sameKind("go"))
            go(message);
        if(message.sameKind("atHome"))
            atHome(message);
        else
        if(message.sameKind("openURL"))
            openURL(message);
        else
        if(message.sameKind("dialog"))
            dialog(message);
        else
            return false;
        return true;
    }

    public void onCreation(Object obj)
    {
        dialog(null);
        home = getAgletContext().getHostingURL().toString();
    }

    public void openURL(Message message)
    {
        try
        {
            getAgletContext().showDocument(new URL(url));
            itinerary.go(home, "atHome");
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
        }
    }
}