/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.mmedia;
import com.sun.midp.events.*;
import com.sun.midp.security.*;
/**
* MMEventHandler is used by BasicPlayer to register an event handler.
*/
public class MMEventHandler {
/**
* Inner class to request security token from SecurityInitializer.
* SecurityInitializer should be able to check this inner class name.
*/
static private class SecurityTrusted
implements ImplicitlyTrustedClass {};
/** This class has a different security domain than the MIDlet suite */
private static SecurityToken classSecurityToken =
SecurityInitializer.requestToken(new SecurityTrusted());
/**
* The EventListener to receive the MM events.
*/
private static EventListener listener;
/**
* Initializes the security token for this class, so it can
* perform actions that a normal MIDlet Suite cannot.
*
* @param token security token for this class.
*/
public static void initSecurityToken(SecurityToken token) {
if (classSecurityToken == null) {
classSecurityToken = token;
}
}
/**
* Set the Event listener on the event queue.
* <br>
* This method is made package-private so only classes from
* com.sun.mmedia (BasicPlayer) can access it for security
* reasons.
*
* @param l EventListener for the MM events.
*/
static void setListener(EventListener l) {
// This can only be set once.
if (listener != null)
return;
listener = l;
EventQueue evtq = EventQueue.getEventQueue(classSecurityToken);
evtq.registerEventListener(EventTypes.MMAPI_EVENT, listener);
}
}
|