javax.servlet.http.HttpSessionBindingEvent Maven / Gradle / Ivy
/*
* Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* 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 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.
*
* @author Various
*
* @see HttpSession
* @see HttpSessionBindingListener
* @see HttpSessionAttributeListener
*/
public class HttpSessionBindingEvent extends HttpSessionEvent {
private static final long serialVersionUID = 7308000419984825907L;
/* The name to which the object is being bound or unbound */
private String name;
/* The object is being bound or unbound */
private 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;
}
/**
*
* 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
* @param value the object that 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. */
@Override
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.
*
* @return the value of the attribute that has been added, removed
* or replaced
*
* @since Servlet 2.3
*/
public Object getValue() {
return this.value;
}
}