java.beans.beancontext

Interface BeanContextChild

All Known Subinterfaces:

BeanContext, BeanContextServices

All Known Implementing Classes:

BeanContextChildSupport, BeanContextServicesSupport, BeanContextSupport

public interface BeanContextChild

JavaBeans wishing to be nested within, and obtain a reference to their execution environment, or context, as defined by the BeanContext sub-interface shall implement this interface.

Conformant BeanContexts shall as a side effect of adding a BeanContextChild object shall pass a reference to itself via the setBeanContext() method of this interface.

Note that a BeanContextChild may refuse a change in state by throwing PropertyVetoedException in response.

In order for persistence mechanisms to function properly on BeanContextChild instances across a broad variety of scenarios, implementing classes of this interface are required to define as transient, any or all fields, or instance variables, that may contain, or represent, references to the nesting BeanContext instance or other resources obtained from the BeanContext via any unspecified mechanisms.

Since:

1.2

See Also:

BeanContext, PropertyChangeEvent, PropertyChangeListener, PropertyVetoException, VetoableChangeListener

Method Summary

Modifier and Type	Method and Description
void	addPropertyChangeListener(String name, PropertyChangeListener pcl) Adds a PropertyChangeListener to this BeanContextChild in order to receive a PropertyChangeEvent whenever the specified property has changed.
void	addVetoableChangeListener(String name, VetoableChangeListener vcl) Adds a VetoableChangeListener to this BeanContextChild to receive events whenever the specified property changes.
BeanContext	getBeanContext() Gets the BeanContext associated with this BeanContextChild.
void	removePropertyChangeListener(String name, PropertyChangeListener pcl) Removes a PropertyChangeListener from this BeanContextChild so that it no longer receives PropertyChangeEvents when the specified property is changed.
void	removeVetoableChangeListener(String name, VetoableChangeListener vcl) Removes a VetoableChangeListener from this BeanContextChild so that it no longer receives events when the specified property changes.
void	setBeanContext(BeanContext bc) Objects that implement this interface, shall fire a java.beans.PropertyChangeEvent, with parameters: propertyName "beanContext", oldValue (the previous nesting BeanContext instance, or null), newValue (the current nesting BeanContext instance, or null).

Method Detail

setBeanContext

void setBeanContext(BeanContext bc)
             throws PropertyVetoException

Objects that implement this interface, shall fire a java.beans.PropertyChangeEvent, with parameters: propertyName "beanContext", oldValue (the previous nesting BeanContext instance, or null), newValue (the current nesting BeanContext instance, or null).

A change in the value of the nesting BeanContext property of this BeanContextChild may be vetoed by throwing the appropriate exception.

Parameters:

bc - The BeanContext with which to associate this BeanContextChild.

Throws:

PropertyVetoException - if the addition of the specified BeanContext is refused.

getBeanContext

BeanContext getBeanContext()

Gets the BeanContext associated with this BeanContextChild.

Returns:

the BeanContext associated with this BeanContextChild.

addPropertyChangeListener

void addPropertyChangeListener(String name,
                               PropertyChangeListener pcl)

Adds a PropertyChangeListener to this BeanContextChild in order to receive a PropertyChangeEvent whenever the specified property has changed.

Parameters:

name - the name of the property to listen on

pcl - the PropertyChangeListener to add

removePropertyChangeListener

void removePropertyChangeListener(String name,
                                  PropertyChangeListener pcl)

Removes a PropertyChangeListener from this BeanContextChild so that it no longer receives PropertyChangeEvents when the specified property is changed.

Parameters:

name - the name of the property that was listened on

pcl - the PropertyChangeListener to remove

addVetoableChangeListener

void addVetoableChangeListener(String name,
                               VetoableChangeListener vcl)

Adds a VetoableChangeListener to this BeanContextChild to receive events whenever the specified property changes.

Parameters:

name - the name of the property to listen on

vcl - the VetoableChangeListener to add

removeVetoableChangeListener

void removeVetoableChangeListener(String name,
                                  VetoableChangeListener vcl)

Removes a VetoableChangeListener from this BeanContextChild so that it no longer receives events when the specified property changes.

Parameters:

name - the name of the property that was listened on.

vcl - the VetoableChangeListener to remove.