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+/* gnu.java.beans.DummyAppletContext
+   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.beans;
+
+import java.applet.Applet;
+import java.applet.AppletContext;
+import java.applet.AudioClip;
+import java.awt.Image;
+import java.awt.Toolkit;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.Iterator;
+
+/** A placeholder <code>AppletContext</code> implementation that does nothing.
+ *
+ * <p>This is the default implementation for GNU Classpath and is used for <code>Applet</code>
+ * beans being created with {@link java.beans.Beans.instantiate}.</p>
+ *
+ * <p>It has no functionality in order to allow it to be used without any dependencies
+ * (e.g. sound, network access, ...).</p>
+ *
+ * @author Robert Schuster
+ */
+class DummyAppletContext implements AppletContext
+{
+  private static final Enumeration EMPTY_ENUMERATION = Collections.enumeration(Collections.EMPTY_SET);
+
+  DummyAppletContext()
+  {
+  }
+
+  /** Implementation is VM neutral and returns a dummy {@link AudioClip} instance
+   * for every URL that returns a non-<code>null</code> object on
+   * <code>URL.openConnection()</code>.
+   *
+   * @see java.applet.AppletContext#getAudioClip(java.net.URL)
+   *
+   * FIXME: When Java Sound API (javax.sound) is included in Classpath or URL is able to handle
+   * sampled sound this should be adjusted.
+   */
+  public AudioClip getAudioClip(URL url)
+  {
+    return Applet.newAudioClip(url);
+  }
+
+  /** Loads the <code>Image</code> instance by delegating to
+   * {@link java.awt.Toolkit.createImage(URL) }.
+   *
+   * @see java.applet.AppletContext#getImage(java.net.URL)
+   * @see java.awt.Toolkit#createImage(java.net.URL)
+   */
+  public Image getImage(URL url)
+  {
+    return Toolkit.getDefaultToolkit().createImage(url);
+  }
+
+  /** Returns <code>null</code> for every argument.
+   *
+   * @see java.applet.AppletContext#getApplet(java.lang.String)
+   */
+  public Applet getApplet(String name)
+  {
+    return null;
+  }
+
+  /** Returns always an empty <code>Enumeration</code>.
+   *
+   * @see java.applet.AppletContext#getApplets()
+   */
+  public Enumeration getApplets()
+  {
+    return EMPTY_ENUMERATION;
+  }
+
+  /** Does nothing.
+   *
+   * @see java.applet.AppletContext#showDocument(java.net.URL)
+   */
+  public void showDocument(URL url)
+  {
+  }
+
+  /** Does nothing.
+   *
+   * @see java.applet.AppletContext#showDocument(java.net.URL, java.lang.String)
+   */
+  public void showDocument(URL url, String target)
+  {
+  }
+
+  /** Does nothing.
+   *
+   * @see java.applet.AppletContext#showStatus(java.lang.String)
+   */
+  public void showStatus(String message)
+  {
+  }
+
+  /** Does nothing.
+   *
+   * @see java.applet.AppletContext#setStream(java.lang.String, java.io.InputStream)
+   */
+  public void setStream(String key, InputStream stream)
+    throws IOException
+  {
+    throw new IOException("Dummy implementation imposes zero InputStream associations.");
+  }
+
+  /** Returns <code>null</code> for every argument.
+   *
+   * @see java.applet.AppletContext#getStream(java.lang.String)
+   */
+  public InputStream getStream(String key)
+  {
+    return null;
+  }
+
+  /** Returns always an empty iterator.
+   *
+   * @see java.applet.AppletContext#getStreamKeys()
+   */
+  public Iterator getStreamKeys()
+  {
+    return Collections.EMPTY_SET.iterator();
+  }
+}