de.dante.extex.interpreter.observer.error
Class ErrorObserverList

java.lang.Object
  de.dante.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: 1.3 $

Author:

Gerd Neugebauer

ErrorObserverList

public ErrorObserverList()

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 occured.

Specified by:

update in interface ErrorObserver

Parameters:

e - the exception describing the error condition

See Also:

ErrorObserver.update( java.lang.Exception)