com.togethersoft.openapi.util.nullObject
Class NullVetoableChangeSupport

java.lang.Object
  |
  +--java.beans.VetoableChangeSupport
        |
        +--com.togethersoft.openapi.util.nullObject.NullVetoableChangeSupport

public class NullVetoableChangeSupport

extends VetoableChangeSupport

implements NullObject

This class has private constructor and can't to be created by anyone.

Author:

TogetherSoft

Since: Together 4.0

Methods inherited from class java.lang.Object

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

Field Detail

myInstance

private static VetoableChangeSupport myInstance

private NullVetoableChangeSupport()

public void addVetoableChangeListener(VetoableChangeListener listener)

Does nothing

public static VetoableChangeSupport addVetoableChangeListener(Object source, VetoableChangeSupport oldSupport, VetoableChangeListener listener)

Adds a vetoable change listener

public void fireVetoableChange(String propertyName, Object oldValue, Object newValue)
                         throws java.beans.PropertyVetoException

Does nothing

public static VetoableChangeSupport getInstance()

Returns an instance of NullVetoableChangeSupport.

public static boolean isNull(VetoableChangeSupport support)

Tests if support is equal to the result of getInstance.

public void removeVetoableChangeListener(VetoableChangeListener listener)

Does nothing

public static VetoableChangeSupport removeVetoableChangeListener(Object source, VetoableChangeSupport oldSupport, VetoableChangeListener listener)

Remove listener. There is no way to check whether listener list is empty... Provided only for symmetry reasons

Association Links

to Class java.beans.VetoableChangeSupport