org.apache.fop.layoutmgr

Class ElementListObserver

java.lang.Object

org.apache.fop.layoutmgr.ElementListObserver

public final class ElementListObserver
extends Object

This class is used to observe Knuth element lists generated within the layout managers. This is mainly used for the purpose of automated testing. This implementation here does nothing. Please see the subclass within the test code.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ElementListObserver.Observer Implement this interface to receive notifications on element lists.

Method Summary

Methods

Modifier and Type	Method and Description
static void	addObserver(ElementListObserver.Observer observer) Adds a new Observer to the list.
static boolean	isObservationActive()
static void	observe(List elementList, String category, String id) Notifies all registered observers about the element list.
static void	removeObserver(ElementListObserver.Observer observer) Removes an Observer from the list.

Methods inherited from class java.lang.Object

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

Method Detail

addObserver

public static void addObserver(ElementListObserver.Observer observer)

Adds a new Observer to the list.

Parameters:

observer - the observer implementation

removeObserver

public static void removeObserver(ElementListObserver.Observer observer)

Removes an Observer from the list. This call simply returns if the observer was not on the list and does nothing.

Parameters:

observer - the observer to remove

observe

public static void observe(List elementList,
           String category,
           String id)

Notifies all registered observers about the element list.

Parameters:

elementList - the Knuth element list

category - the category for the element list (example: main, static-content, table-cell)

id - ID for the element list (may be null)

isObservationActive

public static boolean isObservationActive()

Returns:

true if observation is active, i.e. Observers are registered.