/***
* Copyright 2002-2010 jamod development team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***/
package net.wimpi.modbus.util;
/**
* A cleanroom implementation of the Observer interface
* for the Observable design pattern.
* <p/>
*
* @author Dieter Wimberger (wimpi)
* @version @version@ (@date@)
*/
public interface Observer {
/**
* Updates the state of this <tt>Observer</tt> to be in
* synch with an <tt>Observable</tt> instance.
* The argument should usually be an indication of the
* aspects that changed in the <tt>Observable</tt>.
*
* @param o an <tt>Observable</tt> instance.
* @param arg an arbitrary argument to be passed.
*/
public void update(Observable o, Object arg);
}// interface Observer