org.extex.interpreter.observer.error
Class ErrorObserverList

java.lang.Object
  org.extex.interpreter.observer.error.ErrorObserverList

All Implemented Interfaces:

ErrorObserver

public final class ErrorObserverList
extends java.lang.Object
implements ErrorObserver

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

Version:

$Revision$

Author:

Gerd Neugebauer

Constructor Summary

ErrorObserverList()

Method Summary

void	add(ErrorObserver observer) Add an observer to the list.
static ErrorObserver	register(ErrorObserver list, ErrorObserver observer) Take a list and add an observer.
void	update(java.lang.Exception e) Invoke all observers on the list to inform them of the error occurred.

Methods inherited from class java.lang.Object

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

Constructor Detail

ErrorObserverList

public ErrorObserverList()

Method Detail

register

public static ErrorObserver register(ErrorObserver list,
                                     ErrorObserver 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(ErrorObserver observer)

Add an observer to the list.

Parameters:

observer - the observer to add to the list

update

public void update(java.lang.Exception e)

Invoke all observers on the list to inform them of the error occurred.

Specified by:

update in interface ErrorObserver

Parameters:

e - the exception describing the error condition

See Also:

ErrorObserver.update( java.lang.Exception)