oracle.jbo.server.util
Class PropertyChangeEvent

java.lang.Object
  java.util.EventObject
      oracle.jbo.server.util.PropertyChangeEvent

All Implemented Interfaces:

java.io.Serializable

public class PropertyChangeEvent

extends java.util.EventObject

A "PropertyChange" event gets delivered whenever a bean changes a "bound" or "constrained" property. A PropertyChangeEvent object is sent as an argument to the PropertyChangeListener and VetoableChangeListener methods.

Normally PropertyChangeEvents are accompanied by the name and the old and new value of the changed property. If the new value is a builtin type (such as int or boolean) it must be wrapped as the corresponding java.lang.* Object type (such as Integer or Boolean).

Null values may be provided for the old and the new values if their true values are not known.

An event source may send a null object as the name to indicate that an arbitrary set of if its properties have changed. In this case the old and new values should also be null.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

PropertyChangeEvent(java.lang.Object source, java.lang.String propertyName, java.lang.Object oldValue, java.lang.Object newValue)

Method Summary

java.lang.Object	getNewValue()
java.lang.Object	getOldValue()
java.lang.String	getPropertyName()

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyChangeEvent

public PropertyChangeEvent(java.lang.Object source,
                           java.lang.String propertyName,
                           java.lang.Object oldValue,
                           java.lang.Object newValue)

Parameters:

source - The bean that fired the event.

propertyName - The programmatic name of the property that was changed.

oldValue - The old value of the property.

newValue - The new value of the property.

Method Detail

getPropertyName

public java.lang.String getPropertyName()

Returns:

The programmatic name of the property that was changed. May be null if multiple properties have changed.

getNewValue

public java.lang.Object getNewValue()

Returns:

The new value for the property, expressed as an Object. May be null if multiple properties have changed.

getOldValue

public java.lang.Object getOldValue()

Returns:

The old value for the property, expressed as an Object. May be null if multiple properties have changed.