/*
* 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 java.util;
import java.io.Serializable;
/**
* {@code EventObject}s represent events. Typically applications subclass this class to
* add event specific information.
*
* @see EventListener
*/
public class EventObject implements Serializable {
private static final long serialVersionUID = 5516075349620653480L;
@FindBugsSuppressWarnings("SE_TRANSIENT_FIELD_NOT_RESTORED")
protected transient Object source;
/**
* Constructs a new instance of this class.
*
* @param source
* the object which fired the event.
*/
public EventObject(Object source) {
if (source == null) {
throw new IllegalArgumentException();
}
this.source = source;
}
/**
* Returns the object which fired the event.
*/
public Object getSource() {
return source;
}
/**
* Returns the string representation of this {@code EventObject}.
*/
@Override public String toString() {
return getClass().getName() + "[source=" + source + ']';
}
}