org.extex.interpreter.observer.load
Class LoadObserverList

java.lang.Object
  org.extex.interpreter.observer.load.LoadObserverList

All Implemented Interfaces:

LoadObserver

public final class LoadObserverList
extends java.lang.Object
implements LoadObserver

This class provides a type-safe list of observers for the format load event.

Version:

$Revision:4499 $

Author:

Gerd Neugebauer

Constructor Summary

LoadObserverList()

Method Summary

void	add(LoadObserver observer) Add an observer to the list.
static LoadObserver	register(LoadObserver list, LoadObserver observer) Take a list and add an observer.
void	update(Context context) Invoke all observers on the list to inform them of the format load operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadObserverList

public LoadObserverList()

Method Detail

register

public static LoadObserver register(LoadObserver list,
                                    LoadObserver observer)

Take a list and add an observer. If the list is null then a new one is created.

Parameters:

list - the input list or null

observer - the observer to add

Returns:

the input list or a new one with the observer added

add

public void add(LoadObserver observer)

Add an observer to the list.

Parameters:

observer - the observer to add to the list

update

public void update(Context context)
            throws InterpreterException

Invoke all observers on the list to inform them of the format load operation. This method is meant to be invoked just after the format load has occurred.

Specified by:

update in interface LoadObserver

Parameters:

context - the new interpreter context

Throws:

InterpreterException - in case of an error

See Also:

LoadObserver.update( org.extex.interpreter.context.Context)