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Cayenne Object Persistence Framework
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cayenne.event;
import java.util.Collections;
import java.util.EventObject;
import java.util.Map;
/**
* Common superclass for events passed from the EventManager to Listeners; encapsulates
* optional event information.
*
* @author Dirk Olmes
* @author Holger Hoffstaette
*/
public class CayenneEvent extends EventObject {
protected Map info;
protected transient Object postedBy;
protected EventSubject subject;
public CayenneEvent(Object source) {
this(source, null);
}
public CayenneEvent(Object source, Map info) {
this(source, source, info);
}
/**
* Creates CayenneEvent with possibly different event source and poster. This may be
* the case when an event is resent by listener.
*
* @since 1.1
*/
public CayenneEvent(Object source, Object postedBy, Map info) {
super(source);
this.postedBy = postedBy;
this.info = info;
}
public Map getInfo() {
return info != null ? info : Collections.EMPTY_MAP;
}
/**
* @since 1.2
*/
public EventSubject getSubject() {
return subject;
}
/**
* @since 1.2
*/
public void setSubject(EventSubject subject) {
this.subject = subject;
}
/**
* Used when deserializing remote events.
*/
void setSource(Object source) {
super.source = source;
}
/**
* Returns an object that posted this event. It may be different from event source, if
* event is reposted multiple times.
*/
public Object getPostedBy() {
return postedBy;
}
public void setPostedBy(Object postedBy) {
this.postedBy = postedBy;
}
}
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