JacaretoAppletContext.java :  » Testing » jacareto » jacareto » starter » Java Open Source

/*
 * Jacareto Copyright (c) 2002-2005
 * Applied Computer Science Research Group, Darmstadt University of
 * Technology, Institute of Mathematics & Computer Science,
 * Ludwigsburg University of Education, and Computer Based
 * Learning Research Group, Aachen University. All rights reserved.
 *
 * Jacareto 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.
 *
 * Jacareto 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 Jacareto; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

package jacareto.starter;


import jacareto.system.Environment;
import jacareto.system.EnvironmentMember;

import java.applet.Applet;
import java.applet.AppletContext;
import java.applet.AudioClip;

import java.awt.Image;
import java.awt.Toolkit;

import java.io.InputStream;

import java.net.URL;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Vector;

/**
 * An applet context created in an applet starter.
 *
 * @author <a href="mailto:cspannagel@web.de">Christian Spannagel</a>
 * @version 1.00
 */
public class JacaretoAppletContext extends EnvironmentMember implements AppletContext {
    /** The applets. */
    private Hashtable applets;

    /** The streams. */
    private Hashtable streams;

    /**
     * Creates a new applet context.
     *
     * @param env DOCUMENT ME!
     */
    public JacaretoAppletContext (Environment env) {
        super(env);
        applets = new Hashtable();
        streams = new Hashtable();
    }

    /**
     * Returns the applet with the given name.
     *
     * @param name DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public Applet getApplet (String name) {
        return (Applet) applets.get (name);
    }

    /**
     * Returns all applets.
     *
     * @return all applets
     */
    public Enumeration getApplets () {
        return (new Vector(applets.values ())).elements ();
    }

    /**
     * Creates an audio clip.
     *
     * @param url the URL of the audio clip
     *
     * @return the audio clip
     */
    public AudioClip getAudioClip (URL url) {
        return Applet.newAudioClip (url);
    }

    /**
     * Creates an image.
     *
     * @param url DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public Image getImage (URL url) {
        return Toolkit.getDefaultToolkit ().getImage (url);
    }

    /**
     * Returns a stream.
     *
     * @param key DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public InputStream getStream (String key) {
        return (InputStream) streams.get (key);
    }

    /**
     * Returns the stream keys.
     *
     * @return DOCUMENT ME!
     */
    public Iterator getStreamKeys () {
        return (new Vector(streams.values ())).iterator ();
    }

    /**
     * Sets a stream.
     *
     * @param key DOCUMENT ME!
     * @param stream DOCUMENT ME!
     */
    public void setStream (String key, InputStream stream) {
        streams.put (key, stream);
    }

    /**
     * Replaces the Web page currently being viewed with the given URL.
     *
     * @param url DOCUMENT ME!
     */
    public void showDocument (URL url) {
    }

    /**
     * Replaces the Web page currently being viewed with the given URL.
     *
     * @param url DOCUMENT ME!
     * @param target DOCUMENT ME!
     */
    public void showDocument (URL url, String target) {
    }

    /**
     * Requests that the argument string be displayed in the "status window".
     *
     * @param status DOCUMENT ME!
     */
    public void showStatus (String status) {
    }
}