Package javax.servlet.http

Class HttpSessionBindingEvent

java.lang.Object

java.util.EventObject

javax.servlet.http.HttpSessionEvent

javax.servlet.http.HttpSessionBindingEvent

All Implemented Interfaces:

Serializable

public class HttpSessionBindingEvent
extends HttpSessionEvent

Events of this type are either sent to an object that implements HttpSessionBindingListener when it is bound or unbound from a session, or to an 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.

See Also:

• HttpSession
• HttpSessionBindingListener
• HttpSessionAttributeListener
• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
HttpSessionBindingEvent(HttpSession session, String name)	Constructs an event that notifies an object that it has been bound to or unbound from a session.
HttpSessionBindingEvent(HttpSession session, String name, Object value)	Constructs an event that notifies an object that it has been bound to or unbound from a session.

Method Summary

Modifier and Type	Method	Description
String	getName()	Returns the name with which the attribute is bound to or unbound from the session.
HttpSession	getSession()	Get the session that changed.
Object	getValue()	Returns the value of the attribute that has been added, removed or replaced.

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

HttpSessionBindingEvent

public HttpSessionBindingEvent(HttpSession session,
 String 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 HttpSessionBindingListener.

Parameters:

session - the session to which the object is bound or unbound

name - the name with which the object is bound or unbound

See Also:

• getName()
• getSession()

HttpSessionBindingEvent

public HttpSessionBindingEvent(HttpSession session,
 String name,
 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 HttpSessionBindingListener.

Parameters:

session - the session to which the object is bound or unbound

name - the name with which the object is bound or unbound

value - the object that is bound or unbound

See Also:

• getName()
• getSession()
• getValue()

Method Details

getSession

public HttpSession getSession()

Get the session that changed.

Overrides:

getSession in class HttpSessionEvent

Returns:

The session that changed

getName

public String getName()

Returns the name with which the attribute is bound to or unbound from the session.

Returns:

a string specifying the name with which the object is bound to or unbound from the session

getValue

public Object getValue()

Returns the value of the attribute that has been added, removed or replaced.

Returns:

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