org.extex.interpreter.context.observer.tokens
Interface TokensObservable

All Known Implementing Classes:

ContextExtensionImpl, ContextImpl

public interface TokensObservable

This interface describes the possibility to register an observer for an tokens change event.

Version:

$Revision$

Author:

Gerd Neugebauer

Method Summary

void	registerTokensObserver(java.lang.String name, TokensObserver observer) Register an observer for tokens change events.
void	unregisterTokensChangeObserver(java.lang.String name, TokensObserver observer) Remove a registered observer for toks change events.

Method Detail

registerTokensObserver

void registerTokensObserver(java.lang.String name,
                            TokensObserver observer)

Register an observer for tokens change events. Tokens change events are triggered when an assignment to a tokens register is performed. In this case the appropriate method in the observer is invoked.

Parameters:

name - the token to be observed. This should be a macro or active character token.

observer - the observer to receive the events

unregisterTokensChangeObserver

void unregisterTokensChangeObserver(java.lang.String name,
                                    TokensObserver observer)

Remove a registered observer for toks change events. Tokens change events are triggered when an assignment to a tokens register is performed. In this case the appropriate method in the observer is invoked.

Parameters:

name - the token to be observed. This should be a macro or active character token.

observer - the observer to receive the events