WebFlow
Class VetoableChangeSupport

java.lang.Object
  |
  +--WebFlow.VetoableChangeSupport

public class VetoableChangeSupport
extends java.lang.Object

This is a utility class that can be used by beans that support constrained properties. You can use an instance of this class as a member field of your bean and delegate various work to it.


Constructor Summary
VetoableChangeSupport(org.omg.CORBA.Object sourceBean, BeanContextChildSupport BChild_)
           
 
Method Summary
 void addVetoableChangeListener(org.omg.CORBA.Object listener)
          Add a VetoableListener to the listener list.
 void addVetoableChangeListener(java.lang.String propertyName, org.omg.CORBA.Object listener)
          Add a VetoableChangeListener for a specific property.
 void fireVetoableChange(WebFlow.PropertyChangeEvent evt)
          Fire a vetoable property update to any registered listeners.
 void fireVetoableChange(java.lang.String propertyName, org.omg.CORBA.Any oldValue, org.omg.CORBA.Any newValue)
          Report a vetoable property update to any registered listeners.
 void fireVetoableChange(java.lang.String propertyName, boolean oldValue, boolean newValue)
          Report a boolean vetoable property update to any registered listeners.
 void fireVetoableChange(java.lang.String propertyName, int oldValue, int newValue)
          Report a int vetoable property update to any registered listeners.
 void fireVetoableChange(java.lang.String propertyName, org.omg.CORBA.Object oldValue, org.omg.CORBA.Object newValue)
           
 void fireVetoableChange(java.lang.String propertyName, java.lang.String oldValue, java.lang.String newValue)
           
 boolean hasListeners(java.lang.String propertyName)
          Check if there are any listeners for a specific property.
 void insertContextInfo(org.omg.CORBA.Request request)
           
 void invokeVetoablePropertyChange(org.omg.CORBA.Object target, WebFlow.PropertyChangeEvent evt)
           
 void listContents(java.lang.String propertyName, java.util.Hashtable children)
           
 void removeVetoableChangeListener(org.omg.CORBA.Object listener)
          Remove a VetoableChangeListener from the listener list.
 void removeVetoableChangeListener(java.lang.String propertyName, org.omg.CORBA.Object listener)
          Remove a VetoableChangeListener for a specific property.
 void sendEvent_old(java.lang.String propertyName, WebFlow.PropertyChangeEvent evt)
           
 void sendEvent(java.lang.String propertyName, WebFlow.PropertyChangeEvent evt)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

VetoableChangeSupport

public VetoableChangeSupport(org.omg.CORBA.Object sourceBean,
                             BeanContextChildSupport BChild_)
                      throws java.lang.NullPointerException
Parameters:
sourceBean - The bean to be given as the source for any events.
Method Detail

addVetoableChangeListener

public void addVetoableChangeListener(org.omg.CORBA.Object listener)
Add a VetoableListener to the listener list. The listener is registered for all properties.
Parameters:
listener - The VetoableChangeListener to be added

removeVetoableChangeListener

public void removeVetoableChangeListener(org.omg.CORBA.Object listener)
Remove a VetoableChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.
Parameters:
listener - The VetoableChangeListener to be removed

addVetoableChangeListener

public void addVetoableChangeListener(java.lang.String propertyName,
                                      org.omg.CORBA.Object listener)
                               throws java.lang.NullPointerException
Add a VetoableChangeListener for a specific property. The listener will be invoked only when a call on fireVetoableChange names that specific property.
Parameters:
propertyName - The name of the property to listen on.
listener - The VetoableChangeListener to be added

removeVetoableChangeListener

public void removeVetoableChangeListener(java.lang.String propertyName,
                                         org.omg.CORBA.Object listener)
Remove a VetoableChangeListener for a specific property.
Parameters:
propertyName - The name of the property that was listened on.
listener - The VetoableChangeListener to be removed

fireVetoableChange

public void fireVetoableChange(java.lang.String propertyName,
                               org.omg.CORBA.Any oldValue,
                               org.omg.CORBA.Any newValue)
                        throws WebFlow.event.PropertyVetoException
Report a vetoable property update to any registered listeners. If anyone vetos the change, then fire a new event reverting everyone to the old value and then rethrow the PropertyVetoException.

No event is fired if old and new are equal and non-null.

Parameters:
propertyName - The programmatic name of the property that is about to change..
oldValue - The old value of the property.
newValue - The new value of the property.
Throws:
WebFlow.event.PropertyVetoException - if the recipient wishes the property change to be rolled back.

fireVetoableChange

public void fireVetoableChange(java.lang.String propertyName,
                               java.lang.String oldValue,
                               java.lang.String newValue)
                        throws WebFlow.event.PropertyVetoException

fireVetoableChange

public void fireVetoableChange(java.lang.String propertyName,
                               int oldValue,
                               int newValue)
                        throws WebFlow.event.PropertyVetoException
Report a int vetoable property update to any registered listeners. No event is fired if old and new are equal and non-null.

This is merely a convenience wrapper around the more general fireVetoableChange method that takes Object values.

Parameters:
propertyName - The programmatic name of the property that is about to change.
oldValue - The old value of the property.
newValue - The new value of the property.

fireVetoableChange

public void fireVetoableChange(java.lang.String propertyName,
                               boolean oldValue,
                               boolean newValue)
                        throws WebFlow.event.PropertyVetoException
Report a boolean vetoable property update to any registered listeners. No event is fired if old and new are equal and non-null.

This is merely a convenience wrapper around the more general fireVetoableChange method that takes Object values.

Parameters:
propertyName - The programmatic name of the property that is about to change.
oldValue - The old value of the property.
newValue - The new value of the property.

insertContextInfo

public void insertContextInfo(org.omg.CORBA.Request request)

invokeVetoablePropertyChange

public void invokeVetoablePropertyChange(org.omg.CORBA.Object target,
                                         WebFlow.PropertyChangeEvent evt)
                                  throws WebFlow.event.PropertyVetoException

fireVetoableChange

public void fireVetoableChange(java.lang.String propertyName,
                               org.omg.CORBA.Object oldValue,
                               org.omg.CORBA.Object newValue)
                        throws WebFlow.event.PropertyVetoException

fireVetoableChange

public void fireVetoableChange(WebFlow.PropertyChangeEvent evt)
                        throws WebFlow.event.PropertyVetoException
Fire a vetoable property update to any registered listeners. If anyone vetos the change, then fire a new event reverting everyone to the old value and then rethrow the PropertyVetoException.

No event is fired if old and new are equal and non-null.

Parameters:
evt - The PropertyChangeEvent to be fired.
Throws:
WebFlow.event.PropertyVetoException - if the recipient wishes the property change to be rolled back.

sendEvent_old

public void sendEvent_old(java.lang.String propertyName,
                          WebFlow.PropertyChangeEvent evt)
                   throws WebFlow.event.PropertyVetoException

sendEvent

public void sendEvent(java.lang.String propertyName,
                      WebFlow.PropertyChangeEvent evt)
               throws WebFlow.event.PropertyVetoException

listContents

public void listContents(java.lang.String propertyName,
                         java.util.Hashtable children)

hasListeners

public boolean hasListeners(java.lang.String propertyName)
Check if there are any listeners for a specific property.
Parameters:
propertyName - the property name.
Returns:
true if there are one or more listeners for the given property