javax.servlet.http.HttpSessionBindingEvent Maven / Gradle / Ivy
/*
* 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 javax.servlet.http;
/**
* Events of this type are either sent to an object that implements
* {@link HttpSessionBindingListener} when it is bound or
* unbound from a session, or to a {@link HttpSessionAttributeListener}
* that has been configured in the deployment descriptor when any attribute is
* bound, unbound or replaced in a session.
*
* The session binds the object by a call to
* HttpSession.setAttribute and unbinds the object
* by a call to HttpSession.removeAttribute.
*
* @version $Rev: 788194 $ $Date: 2009-06-24 18:05:48 -0400 (Wed, 24 Jun 2009) $
* @see HttpSessionAttributeListener
* @see HttpSession
* @see HttpSessionBindingListener
*/
public class HttpSessionBindingEvent extends HttpSessionEvent {
/* The name to which the object is being bound or unbound */
private final String name;
/* The object is being bound or unbound */
private final Object value;
/**
* Constructs an event that notifies an object that it
* has been bound to or unbound from a session.
* To receive the event, the object must implement
* {@link HttpSessionBindingListener}.
*
* @param session the session to which the object is bound or unbound
* @param name the name with which the object is bound or unbound
* @see #getName
* @see #getSession
*/
public HttpSessionBindingEvent(HttpSession session, String name) {
super(session);
this.name = name;
value = null;
}
/**
* Constructs an event that notifies an object that it
* has been bound to or unbound from a session.
* To receive the event, the object must implement
* {@link HttpSessionBindingListener}.
*
* @param session the session to which the object is bound or unbound
* @param name the name with which the object is bound or unbound
* @see #getName
* @see #getSession
*/
public HttpSessionBindingEvent(HttpSession session, String name, Object value) {
super(session);
this.name = name;
this.value = value;
}
/**
* Return the session that changed.
*/
public HttpSession getSession() {
return super.getSession();
}
/**
* Returns the name with which the attribute is bound to or
* unbound from the session.
*
* @return a string specifying the name with which
* the object is bound to or unbound from
* the session
*/
public String getName() {
return name;
}
/**
* Returns the value of the attribute that has been added, removed or replaced.
* If the attribute was added (or bound), this is the value of the attribute. If the attribute was
* removed (or unbound), this is the value of the removed attribute. If the attribute was replaced, this
* is the old value of the attribute.
*
* @since 2.3
*/
public Object getValue() {
return this.value;
}
}