IT. Expert System.

Java Standard Edition (SE)

BeanContextChildSupport


java.beans.beancontext

Class BeanContextChildSupport

    • Field Detail

      • beanContextChildPeer

        public BeanContextChild beanContextChildPeer
        The BeanContext in which this BeanContextChild is nested.
      • pcSupport

        protected PropertyChangeSupport pcSupport
        The PropertyChangeSupport associated with this BeanContextChildSupport.
      • vcSupport

        protected VetoableChangeSupport vcSupport
        The VetoableChangeSupport associated with this BeanContextChildSupport.
      • beanContext

        protected transient BeanContext beanContext
        The bean context.
      • rejectedSetBCOnce

        protected transient boolean rejectedSetBCOnce
        A flag indicating that there has been at least one PropertyChangeVetoException thrown for the attempted setBeanContext operation.
    • Constructor Detail

      • BeanContextChildSupport

        public BeanContextChildSupport()
        construct a BeanContextChildSupport where this class has been subclassed in order to implement the JavaBean component itself.
      • BeanContextChildSupport

        public BeanContextChildSupport(BeanContextChild bcc)
        construct a BeanContextChildSupport where the JavaBean component itself implements BeanContextChild, and encapsulates this, delegating that interface to this implementation
        Parameters:
        bcc - the underlying bean context child
    • Method Detail

      • getBeanContext

        public BeanContext getBeanContext()
        Gets the nesting BeanContext for this BeanContextChildSupport.
        Specified by:
        getBeanContext in interface BeanContextChild
        Returns:
        the nesting BeanContext for this BeanContextChildSupport.
      • addPropertyChangeListener

        public void addPropertyChangeListener(String name,
                                              PropertyChangeListener pcl)
        Add a PropertyChangeListener for a specific property. The same listener object may be added more than once. For each property, the listener will be invoked the number of times it was added for that property. If name or pcl is null, no exception is thrown and no action is taken.
        Specified by:
        addPropertyChangeListener in interface BeanContextChild
        Parameters:
        name - The name of the property to listen on
        pcl - The PropertyChangeListener to be added
      • removePropertyChangeListener

        public void removePropertyChangeListener(String name,
                                                 PropertyChangeListener pcl)
        Remove a PropertyChangeListener for a specific property. If pcl was added more than once to the same event source for the specified property, it will be notified one less time after being removed. If name is null, no exception is thrown and no action is taken. If pcl is null, or was never added for the specified property, no exception is thrown and no action is taken.
        Specified by:
        removePropertyChangeListener in interface BeanContextChild
        Parameters:
        name - The name of the property that was listened on
        pcl - The PropertyChangeListener to be removed
      • addVetoableChangeListener

        public void addVetoableChangeListener(String name,
                                              VetoableChangeListener vcl)
        Add a VetoableChangeListener for a specific property. The same listener object may be added more than once. For each property, the listener will be invoked the number of times it was added for that property. If name or vcl is null, no exception is thrown and no action is taken.
        Specified by:
        addVetoableChangeListener in interface BeanContextChild
        Parameters:
        name - The name of the property to listen on
        vcl - The VetoableChangeListener to be added
      • removeVetoableChangeListener

        public void removeVetoableChangeListener(String name,
                                                 VetoableChangeListener vcl)
        Removes a VetoableChangeListener. If pcl was added more than once to the same event source for the specified property, it will be notified one less time after being removed. If name is null, no exception is thrown and no action is taken. If vcl is null, or was never added for the specified property, no exception is thrown and no action is taken.
        Specified by:
        removeVetoableChangeListener in interface BeanContextChild
        Parameters:
        name - The name of the property that was listened on
        vcl - The VetoableChangeListener to be removed
      • serviceRevoked

        public void serviceRevoked(BeanContextServiceRevokedEvent bcsre)
        A service provided by the nesting BeanContext has been revoked. Subclasses may override this method in order to implement their own behaviors.
        Specified by:
        serviceRevoked in interface BeanContextServiceRevokedListener
        Parameters:
        bcsre - The BeanContextServiceRevokedEvent fired as a result of a service being revoked
      • serviceAvailable

        public void serviceAvailable(BeanContextServiceAvailableEvent bcsae)
        A new service is available from the nesting BeanContext. Subclasses may override this method in order to implement their own behaviors
        Specified by:
        serviceAvailable in interface BeanContextServicesListener
        Parameters:
        bcsae - The BeanContextServiceAvailableEvent fired as a result of a service becoming available
      • getBeanContextChildPeer

        public BeanContextChild getBeanContextChildPeer()
        Gets the BeanContextChild associated with this BeanContextChildSupport.
        Returns:
        the BeanContextChild peer of this class
      • isDelegated

        public boolean isDelegated()
        Reports whether or not this class is a delegate of another.
        Returns:
        true if this class is a delegate of another
      • firePropertyChange

        public void firePropertyChange(String name,
                                       Object oldValue,
                                       Object newValue)
        Report a bound property update to any registered listeners. No event is fired if old and new are equal and non-null.
        Parameters:
        name - The programmatic name of the property that was changed
        oldValue - The old value of the property
        newValue - The new value of the property
      • fireVetoableChange

        public void fireVetoableChange(String name,
                                       Object oldValue,
                                       Object newValue)
                                throws 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:
        name - 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:
        PropertyVetoException - if the recipient wishes the property change to be rolled back.
      • validatePendingSetBeanContext

        public boolean validatePendingSetBeanContext(BeanContext newValue)
        Called from setBeanContext to validate (or otherwise) the pending change in the nesting BeanContext property value. Returning false will cause setBeanContext to throw PropertyVetoException.
        Parameters:
        newValue - the new value that has been requested for the BeanContext property
        Returns:
        true if the change operation is to be vetoed
      • releaseBeanContextResources

        protected void releaseBeanContextResources()
        This method may be overridden by subclasses to provide their own release behaviors. When invoked any resources held by this instance obtained from its current BeanContext property should be released since the object is no longer nested within that BeanContext.
      • initializeBeanContextResources

        protected void initializeBeanContextResources()
        This method may be overridden by subclasses to provide their own initialization behaviors. When invoked any resources required by the BeanContextChild should be obtained from the current BeanContext.


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