javax.media.jai
Class PropertyChangeSupportJAI

java.lang.Object
  |
  +--java.beans.PropertyChangeSupport
        |
        +--javax.media.jai.PropertyChangeSupportJAI

All Implemented Interfaces:

Serializable

public final class PropertyChangeSupportJAI

extends PropertyChangeSupport

Extension of the beans utility class PropertyChangeSupport which adds an accessor for the parameter passed to the constructor. All events fired by the firePropertyChange() methods of this class are instances of PropertyChangeEventJAI; consequently all property names are forced to lower case for recognition purposes. The property name-specific PropertyChangeListener registration and unregistration methods defined in this class also force the supplied property name to lower case.

Since:

JAI 1.1

See Also:

PropertyChangeSupport, Serialized Form

Field Summary

protected Object

propertyChangeEventSource The PropertyChangeEvent source.

Constructor Summary

PropertyChangeSupportJAI(Object propertyChangeEventSource)
Constructs a PropertyChangeSupportJAI object.

Method Summary

void	addPropertyChangeListener(String propertyName, PropertyChangeListener listener) Add a PropertyChangeListener for a specific property.
void	firePropertyChange(PropertyChangeEvent evt) Report a bound property update to any registered listeners.
void	firePropertyChange(String propertyName, Object oldValue, Object newValue) Report a bound property update to any registered listeners.
Object	getPropertyChangeEventSource() Retrieve the parameter passed to the constructor.
boolean	hasListeners(String propertyName) Check whether there are any listeners for a specific property.
void	removePropertyChangeListener(String propertyName, PropertyChangeListener listener) Remove a PropertyChangeListener for a specific property.

Methods inherited from class java.beans.PropertyChangeSupport

addPropertyChangeListener, firePropertyChange, firePropertyChange, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Field Detail

propertyChangeEventSource

protected Object propertyChangeEventSource

The PropertyChangeEvent source.

Constructor Detail

PropertyChangeSupportJAI

public PropertyChangeSupportJAI(Object propertyChangeEventSource)

Constructs a PropertyChangeSupportJAI object. The parameter is cached for later use and retrieval.

Parameters:

propertyChangeEventSource - The property change event source.

Throws:

If - propertyChangeEventSource is null then a NullPointerException will be thrown in the superclass.

Method Detail

getPropertyChangeEventSource

public Object getPropertyChangeEventSource()

Retrieve the parameter passed to the constructor.

Returns:

The property change event source.

addPropertyChangeListener

public void addPropertyChangeListener(String propertyName,
                                      PropertyChangeListener listener)

Add a PropertyChangeListener for a specific property. The propertyName is forced to lower case.

Overrides:

addPropertyChangeListener in class PropertyChangeSupport

Throws:

IllegalArgumentException - if propertyName is null.

removePropertyChangeListener

public void removePropertyChangeListener(String propertyName,
                                         PropertyChangeListener listener)

Remove a PropertyChangeListener for a specific property. The propertyName is forced to lower case.

Overrides:

removePropertyChangeListener in class PropertyChangeSupport

Throws:

IllegalArgumentException - if propertyName is null.

firePropertyChange

public void firePropertyChange(PropertyChangeEvent evt)

Report a bound property update to any registered listeners. If the supplied object is not a PropertyChangeEventJAI then a PropertyChangeEventJAI is constructed from the event object's accessors and fired instead.

Overrides:

firePropertyChange in class PropertyChangeSupport

Parameters:

evt - The PropertyChangeEvent object.

firePropertyChange

public void firePropertyChange(String propertyName,
                               Object oldValue,
                               Object newValue)

Report a bound property update to any registered listeners. A PropertyChangeEventJAI is created from the cached property event source and the supplied parameters and fired using the superclass firePropertyChange(PropertyChangeEvent) method.

Overrides:

firePropertyChange in class PropertyChangeSupport

Parameters:

propertyName - The name of the changed property.

oldValue - The old value of the property.

newValue - The new value of the property.

hasListeners

public boolean hasListeners(String propertyName)

Check whether there are any listeners for a specific property. The propertyName is forced to lower case.

Overrides:

hasListeners in class PropertyChangeSupport

Parameters:

propertyName - The name of the property.

Returns:

true if there are one or more listeners for the given property