Package org.apache.fop.layoutmgr
Class ElementListObserver
- java.lang.Object
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- org.apache.fop.layoutmgr.ElementListObserver
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public final class ElementListObserver extends java.lang.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.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
ElementListObserver.Observer
Implement this interface to receive notifications on element lists.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static void
addObserver(ElementListObserver.Observer observer)
Adds a new Observer to the list.static boolean
isObservationActive()
static void
observe(java.util.List elementList, java.lang.String category, java.lang.String id)
Notifies all registered observers about the element list.static void
removeObserver(ElementListObserver.Observer observer)
Removes an Observer from the list.
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Method Detail
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addObserver
public static void addObserver(ElementListObserver.Observer observer)
Adds a new Observer to the list.- Parameters:
observer
- the observer implementation
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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
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observe
public static void observe(java.util.List elementList, java.lang.String category, java.lang.String id)
Notifies all registered observers about the element list.- Parameters:
elementList
- the Knuth element listcategory
- the category for the element list (example: main, static-content, table-cell)id
- ID for the element list (may be null)
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isObservationActive
public static boolean isObservationActive()
- Returns:
- true if observation is active, i.e. Observers are registered.
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