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org.eclipse.core.databinding.observable.map
Class ComputedObservableMap

java.lang.Object
  

java.util.AbstractMap
      

org.eclipse.core.databinding.observable.map.AbstractObservableMap
          
org.eclipse.core.databinding.observable.map.ComputedObservableMap

All Implemented Interfaces:

Map, IObservable, IObservableMap

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public abstract class ComputedObservableMap
extends 
AbstractObservableMap

Maps objects to one of their attributes. Tracks changes to the underlying observable set of objects (keys), as well as changes to attribute values.

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Nested Class Summary

 

Nested classes/interfaces inherited from class java.util. AbstractMap
AbstractMap.SimpleEntry< K, V>, AbstractMap.SimpleImmutableEntry< K, V>

 

Nested classes/interfaces inherited from interface java.util. Map
Map.Entry< K, V>

 

Constructor Summary
ComputedObservableMap ( IObservableSet keySet)
ComputedObservableMap ( IObservableSet keySet, Object valueType)

 

Method Summary
void	dispose ()           Disposes of this observable object, removing all listeners registered with this object, and all listeners this object might have registered on other objects.
protected abstract   Object	doGet ( Object key)
protected abstract   Object	doPut ( Object key, Object value)
Set	entrySet ()
protected  void	fireSingleChange ( Object key, Object oldValue, Object newValue)
protected  void	firstListenerAdded ()
Object	get ( Object key)
Object	getKeyType ()           Returns the element type for the keyset of this observable map, or null if the keyset is untyped.
Object	getValueType ()           Returns the element type for the values of this observable map, or null if the values collection is untyped.
protected abstract  void	hookListener ( Object addedKey)
protected  void	init ()           Deprecated. Subclasses are no longer required to call this method.
boolean	isStale ()           Returns whether the state of this observable is stale and is expected to change soon.
Set	keySet ()
protected  void	lastListenerRemoved ()
Object	put ( Object key, Object value)
protected abstract  void	unhookListener ( Object removedKey)

 

Methods inherited from class org.eclipse.core.databinding.observable.map. AbstractObservableMap
addChangeListener, addDisposeListener, addMapChangeListener, addStaleListener, checkRealm, fireChange, fireMapChange, fireStale, getRealm, hasListeners, isDisposed, removeChangeListener, removeDisposeListener, removeMapChangeListener, removeStaleListener, setStale

 

Methods inherited from class java.util. AbstractMap
clear, clone, containsKey, containsValue, equals, hashCode, isEmpty, putAll, remove, size, toString, values

 

Methods inherited from class java.lang. Object
finalize, getClass, notify, notifyAll, wait, wait, wait

 

Methods inherited from interface org.eclipse.core.databinding.observable.map. IObservableMap
containsKey, containsValue, equals, hashCode, isEmpty, remove, size, values

 

Methods inherited from interface java.util. Map
clear, putAll

 

Constructor Detail

ComputedObservableMap

public ComputedObservableMap(
IObservableSet keySet)

Parameters:

keySet -

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ComputedObservableMap

public ComputedObservableMap(
IObservableSet keySet,
                             
Object valueType)

Parameters:

keySet -

valueType -

Since:

1.2

Method Detail

init

protected void init()

Deprecated. Subclasses are no longer required to call this method.

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firstListenerAdded

protected void firstListenerAdded()

Overrides:

firstListenerAdded in class AbstractObservableMap

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lastListenerRemoved

protected void lastListenerRemoved()

Overrides:

lastListenerRemoved in class AbstractObservableMap

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fireSingleChange

protected final void fireSingleChange(
Object key,
                                      
Object oldValue,
                                      
Object newValue)

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getKeyType

public 
Object getKeyType()

Description copied from interface: IObservableMap

Returns the element type for the keyset of this observable map, or null if the keyset is untyped.

Specified by:

getKeyType in interface IObservableMap

Overrides:

getKeyType in class AbstractObservableMap

Returns:

the element type for the keyset of this observable map, or null if the keyset is untyped.

Since:

1.2

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getValueType

public 
Object getValueType()

Description copied from interface: IObservableMap

Returns the element type for the values of this observable map, or null if the values collection is untyped.

Specified by:

getValueType in interface IObservableMap

Overrides:

getValueType in class AbstractObservableMap

Returns:

the element type for the values of this observable map, or null if the values collection is untyped.

Since:

1.2

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entrySet

public 
Set entrySet()

Specified by:

entrySet in interface Map

Specified by:

entrySet in interface IObservableMap

Specified by:

entrySet in class AbstractMap

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keySet

public 
Set keySet()

Specified by:

keySet in interface Map

Specified by:

keySet in interface IObservableMap

Overrides:

keySet in class AbstractMap

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get

public final 
Object get(
Object key)

Specified by:

get in interface Map

Specified by:

get in interface IObservableMap

Overrides:

get in class AbstractMap

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put

public final 
Object put(
Object key,
                        
Object value)

Specified by:

put in interface Map

Specified by:

put in interface IObservableMap

Overrides:

put in class AbstractMap

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unhookListener

protected abstract void unhookListener(
Object removedKey)

Parameters:

removedKey -

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hookListener

protected abstract void hookListener(
Object addedKey)

Parameters:

addedKey -

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doGet

protected abstract 
Object doGet(
Object key)

Parameters:

key -

Returns:

the value for the given key

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doPut

protected abstract 
Object doPut(
Object key,
                                
Object value)

Parameters:

key -

value -

Returns:

the old value for the given key

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isStale

public boolean isStale()

Description copied from interface: IObservable

Returns whether the state of this observable is stale and is expected to change soon. A non-stale observable that becomes stale will notify its stale listeners. A stale object that becomes non-stale does so by changing its state and notifying its change listeners, it does not notify its stale listeners about becoming non-stale. Clients that do not expect asynchronous changes may ignore staleness of observable objects.

Specified by:

isStale in interface IObservable

Overrides:

isStale in class AbstractObservableMap

Returns:

true if this observable's state is stale and will change soon.

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dispose

public void dispose()

Description copied from interface: IObservable

Disposes of this observable object, removing all listeners registered with this object, and all listeners this object might have registered on other objects.

Specified by:

dispose in interface IObservable

Overrides:

dispose in class AbstractObservableMap

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