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Oracle® Coherence Java API Reference
Release 3.7.0.0

E18683-01


com.tangosol.util
Class NullImplementation.NullObservableMap

java.lang.Object
  extended by java.util.AbstractMap
      extended by com.tangosol.util.NullImplementation.NullMap
          extended by com.tangosol.util.NullImplementation.NullObservableMap

All Implemented Interfaces:
ExternalizableLite, PortableObject, ObservableMap, java.io.Serializable, java.util.Map
Enclosing class:
NullImplementation

public static class NullImplementation.NullObservableMap
extends NullImplementation.NullMap
implements ObservableMap

An immutable ObservableMap which contains nothing.


Nested Class Summary

 

Nested classes/interfaces inherited from interface java.util.Map
java.util.Map.Entry

 

Field Summary
static ObservableMap INSTANCE
          Since the Map contains no information, only one ever has to exist.

 

Constructor Summary
NullImplementation.NullObservableMap()
          Default constructor (for ExternalizableLite and PortableObject).

 

Method Summary
 void addMapListener(MapListener listener)
          Add a standard map listener that will receive all events (inserts, updates, deletes) that occur against the map, with the key, old-value and new-value included.
 void addMapListener(MapListener listener, Filter filter, boolean fLite)
          Add a map listener that receives events based on a filter evaluation.
 void addMapListener(MapListener listener, java.lang.Object oKey, boolean fLite)
          Add a map listener for a specific key.
 void removeMapListener(MapListener listener)
          Remove a standard map listener that previously signed up for all events.
 void removeMapListener(MapListener listener, Filter filter)
          Remove a map listener that previously signed up for events based on a filter evaluation.
 void removeMapListener(MapListener listener, java.lang.Object oKey)
          Remove a map listener that previously signed up for events about a specific key.

 

Methods inherited from class com.tangosol.util.NullImplementation.NullMap
containsKey, containsValue, entrySet, equals, get, hashCode, keySet, put, putAll, readExternal, readExternal, remove, size, values, writeExternal, writeExternal

 

Methods inherited from class java.util.AbstractMap
clear, clone, isEmpty, toString

 

Methods inherited from interface java.util.Map
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

 

Field Detail

INSTANCE

public static final ObservableMap INSTANCE
Since the Map contains no information, only one ever has to exist.

Constructor Detail

NullImplementation.NullObservableMap

public NullImplementation.NullObservableMap()
Default constructor (for ExternalizableLite and PortableObject).

Method Detail

addMapListener

public void addMapListener(MapListener listener)
Add a standard map listener that will receive all events (inserts, updates, deletes) that occur against the map, with the key, old-value and new-value included. This has the same result as the following call:
   addMapListener(listener, (Filter) null, false);
 
Specified by:
addMapListener in interface ObservableMap
Parameters:
listener - the MapEvent listener to add

removeMapListener

public void removeMapListener(MapListener listener)
Remove a standard map listener that previously signed up for all events. This has the same result as the following call:
   removeMapListener(listener, (Filter) null);
 
Specified by:
removeMapListener in interface ObservableMap
Parameters:
listener - the listener to remove

addMapListener

public void addMapListener(MapListener listener,
                           java.lang.Object oKey,
                           boolean fLite)
Add a map listener for a specific key.

The listeners will receive MapEvent objects, but if fLite is passed as true, they might not contain the OldValue and NewValue properties.

To unregister the MapListener, use the ObservableMap.removeMapListener(MapListener, Object) method.

Specified by:
addMapListener in interface ObservableMap
Parameters:
listener - the MapEvent listener to add
oKey - the key that identifies the entry for which to raise events
fLite - true to indicate that the MapEvent objects do not have to include the OldValue and NewValue property values in order to allow optimizations

removeMapListener

public void removeMapListener(MapListener listener,
                              java.lang.Object oKey)
Remove a map listener that previously signed up for events about a specific key.
Specified by:
removeMapListener in interface ObservableMap
Parameters:
listener - the listener to remove
oKey - the key that identifies the entry for which to raise events

addMapListener

public void addMapListener(MapListener listener,
                           Filter filter,
                           boolean fLite)
Add a map listener that receives events based on a filter evaluation.

The listeners will receive MapEvent objects, but if fLite is passed as true, they might not contain the OldValue and NewValue properties.

To unregister the MapListener, use the ObservableMap.removeMapListener(MapListener, Filter) method.

Specified by:
addMapListener in interface ObservableMap
Parameters:
listener - the MapEvent listener to add
filter - a filter that will be passed MapEvent objects to select from; a MapEvent will be delivered to the listener only if the filter evaluates to true for that MapEvent (see MapEventFilter); null is equivalent to a filter that alway returns true
fLite - true to indicate that the MapEvent objects do not have to include the OldValue and NewValue property values in order to allow optimizations

removeMapListener

public void removeMapListener(MapListener listener,
                              Filter filter)
Remove a map listener that previously signed up for events based on a filter evaluation.
Specified by:
removeMapListener in interface ObservableMap
Parameters:
listener - the listener to remove
filter - the filter that was passed into the corresponding addMapListener() call

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Oracle® Coherence Java API Reference
Release 3.7.0.0

E18683-01


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