/* A dummy TypeListener for testing.
Copyright (c) 1998-2006 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.actor.test;
import ptolemy.actor.TypeEvent;
import ptolemy.actor.TypeListener;
import ptolemy.data.type.Type;
//////////////////////////////////////////////////////////////////////////
//// TestTypeListener
/**
This dummy type listener implements the TypeListener interface.
It keeps the last type change event information in a String
message and returns that message in the getMessage() method.
The call to getMessage() clears the message.
@author Yuhong Xiong
@version $Id$
@since Ptolemy II 0.2
@Pt.ProposedRating Red (cxh)
@Pt.AcceptedRating Red (cxh)
*/
public class TestTypeListener implements TypeListener {
///////////////////////////////////////////////////////////////////
//// public methods ////
/** Return the last type change message. The message includes the
* full name of the port, the old type, and the new type,
* separated by "/". A call to this message
* also clears the old message. If there is no type change
* event after the last call, this method returns the String
* "no type change".
* @return A String including the type change information.
*/
public String getMessage() {
String temp = _message;
_message = "no type change";
return temp;
}
/** Notify that the type of a port is changed.
* @param event The type change event.
*/
public void typeChanged(TypeEvent event) {
_message = event.getSource().getFullName() + "/";
Type oldtype = event.getOldType();
_message += (oldtype.toString() + "/");
Type newtype = event.getNewType();
_message += newtype.toString();
}
///////////////////////////////////////////////////////////////////
//// private variables ////
private String _message = "";
}