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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 {
/* 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
*
* @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 Servlet 2.3
*/
public Object getValue() {
return this.value;
}
}