Class PropertyChangeSupport

public PropertyChangeSupport(Object source)

Create a PropertyChangeSupport to work with a specific source bean.

Parameters:

source - the source bean to use

Throws:

NullPointerException - if source is null

public void addPropertyChangeListener(PropertyChangeListener l)

Adds a PropertyChangeListener to the list of global listeners. All property change events will be sent to this listener. The listener add is not unique: that is, n adds with the same listener will result in n events being sent to that listener for every property change. Adding a null listener is silently ignored. This method will unwrap a PropertyChangeListenerProxy, registering the underlying delegate to the named property list.

Parameters:

l - the listener to add

public void addPropertyChangeListener(String propertyName,
                                      PropertyChangeListener l)

Adds a PropertyChangeListener listening on the specified property. Events will be sent to the listener only if the property name matches. The listener add is not unique; that is, n adds on a particular property for a particular listener will result in n events being sent to that listener when that property is changed. The effect is cumulative, too; if you are registered to listen to receive events on all property changes, and then you register on a particular property, you will receive change events for that property twice. Adding a null listener is silently ignored. This method will unwrap a PropertyChangeListenerProxy, registering the underlying delegate to the named property list if the names match, and discarding it otherwise.

Parameters:

propertyName - the name of the property to listen on

l - the listener to add

Throws:

NullPointerException - if propertyName is null

public void fireIndexedPropertyChange(String name,
                                      int index,
                                      boolean oldValue,
                                      boolean newValue)

Fire an indexed property change event. This will only fire an event if the old and new values are not equal.

Parameters:

name - the name of the property which changed

index - the index of the property which changed

oldValue - the old value of the property

newValue - the new value of the property

Since:

1.5

public void fireIndexedPropertyChange(String name,
                                      int index,
                                      int oldValue,
                                      int newValue)

Fire an indexed property change event. This will only fire an event if the old and new values are not equal.

Parameters:

name - the name of the property which changed

index - the index of the property which changed

oldValue - the old value of the property

newValue - the new value of the property

Since:

1.5

public void fireIndexedPropertyChange(String name,
                                      int index,
                                      Object oldValue,
                                      Object newValue)

Fire an indexed property change event. This will only fire an event if the old and new values are not equal and not null.

Parameters:

name - the name of the property which changed

index - the index of the property which changed

oldValue - the old value of the property

newValue - the new value of the property

Since:

1.5

public void firePropertyChange(PropertyChangeEvent event)

Fire a PropertyChangeEvent to all the global listeners, and to all the listeners for the specified property name. This does nothing if old and new values of the event are equal.

Parameters:

event - the event to fire

Throws:

NullPointerException - if event is null

public void firePropertyChange(String propertyName,
                               boolean oldVal,
                               boolean newVal)

Fire a PropertyChangeEvent containing the old and new values of the property to all the global listeners, and to all the listeners for the specified property name. This does nothing if old and new are equal.

Parameters:

propertyName - the name of the property that changed

oldVal - the old value

newVal - the new value

public void firePropertyChange(String propertyName,
                               int oldVal,
                               int newVal)

Fire a PropertyChangeEvent containing the old and new values of the property to all the global listeners, and to all the listeners for the specified property name. This does nothing if old and new are equal.

Parameters:

propertyName - the name of the property that changed

oldVal - the old value

newVal - the new value

public void firePropertyChange(String propertyName,
                               Object oldVal,
                               Object newVal)

Fire a PropertyChangeEvent containing the old and new values of the property to all the global listeners, and to all the listeners for the specified property name. This does nothing if old and new are non-null and equal.

Parameters:

propertyName - the name of the property that changed

oldVal - the old value

newVal - the new value

public PropertyChangeListener[] getPropertyChangeListeners()

Returns an array of all registered property change listeners. Those that were registered under a name will be wrapped in a PropertyChangeListenerProxy, so you must check whether the listener is an instance of the proxy class in order to see what name the real listener is registered under. If there are no registered listeners, this returns an empty array.

Returns:

the array of registered listeners

Since:

1.4

See Also:

PropertyChangeListenerProxy

public PropertyChangeListener[] getPropertyChangeListeners(String propertyName)

Returns an array of all property change listeners registered under the given property name. If there are no registered listeners, or propertyName is null, this returns an empty array.

Returns:

the array of registered listeners

Since:

1.4

public boolean hasListeners(String propertyName)

Tell whether the specified property is being listened on or not. This will only return true if there are listeners on all properties or if there is a listener specifically on this property.

Parameters:

propertyName - the property that may be listened on

Returns:

whether the property is being listened on

public void removePropertyChangeListener(PropertyChangeListener l)

Removes a PropertyChangeListener from the list of global listeners. If any specific properties are being listened on, they must be deregistered by themselves; this will only remove the general listener to all properties. If add() has been called multiple times for a particular listener, remove() will have to be called the same number of times to deregister it. This method will unwrap a PropertyChangeListenerProxy, removing the underlying delegate from the named property list.

Parameters:

l - the listener to remove

public void removePropertyChangeListener(String propertyName,
                                         PropertyChangeListener l)

Removes a PropertyChangeListener from listening to a specific property. If add() has been called multiple times for a particular listener on a property, remove() will have to be called the same number of times to deregister it. This method will unwrap a PropertyChangeListenerProxy, removing the underlying delegate from the named property list if the names match.

Parameters:

propertyName - the property to stop listening on

l - the listener to remove

Throws:

NullPointerException - if propertyName is null