oracle.jbo.server
Class JboMultiCaster

java.lang.Object
  |
  +--oracle.jbo.server.JboMultiCaster

All Implemented Interfaces:

java.util.EventListener, JboEventListener

public class JboMultiCaster

extends java.lang.Object

implements JboEventListener

Implements the chaining of event listeners in the event system.

Each instance of this class contains an event listener and a pointer to the next instance. Sets of listeners are implemented as linked lists.

This class is used by the JDeveloper wizards to implement event publishing logic.

Since:

JDeveloper 3.0

Field Summary

Type	Field
protected JboEventListener	a
protected JboEventListener	b

Constructor Summary

Type	Constructor
protected	JboMultiCaster(JboEventListener a, JboEventListener b) A new instance of this class can only be constructed by this class itself.

Method Summary

Type	Method
static JboEventListener	add(JboEventListener a, JboEventListener b) Adds a listener to the end of a list of listeners.
protected static JboEventListener	addInternal(JboEventListener a, JboEventListener b)
void	JboEvent(JboEventObject e) Transmits an event to all the listeners in this list.
protected JboEventListener	remove(JboEventListener oldl)
static JboEventListener	remove(JboEventListener l, JboEventListener oldl) Remove a listener from a list of listeners.
protected static JboEventListener	removeInternal(JboEventListener a, JboEventListener b)

Methods inherited from class java.lang.Object

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

Field Detail

a

protected JboEventListener a

b

protected JboEventListener b

Constructor Detail

JboMultiCaster

protected JboMultiCaster(JboEventListener a,
                         JboEventListener b)

A new instance of this class can only be constructed by this class itself.

Method Detail

add

public static JboEventListener add(JboEventListener a,
                                   JboEventListener b)

Adds a listener to the end of a list of listeners.

Parameters:

a - a listener or a list of listeners.

b - a listener.

Returns:

a new list of listeners consisting of b appended to the end of a.

remove

public static JboEventListener remove(JboEventListener l,
                                      JboEventListener oldl)

Remove a listener from a list of listeners.

Parameters:

l - a listener or list of listeners.

a - the listener to be removed.

Returns:

a a copy of l with a excised, or l itself if a is not found, or null if the resulting list is empty.

JboEvent

public void JboEvent(JboEventObject e)

Transmits an event to all the listeners in this list.

Specified by:

JboEvent in interface JboEventListener

Parameters:

e - the event to be transmitted.

addInternal

protected static JboEventListener addInternal(JboEventListener a,
                                              JboEventListener b)

removeInternal

protected static JboEventListener removeInternal(JboEventListener a,
                                                 JboEventListener b)

remove

protected JboEventListener remove(JboEventListener oldl)