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package java.beans;

A class which extends the EventListenerProxy specifically
for adding a named PropertyChangeListener. Instances of
this class can be added as PropertyChangeListener to
an object.

If the object has a getPropertyChangeListeners()
method then the array returned could be a mixture of
PropertyChangeListener and
PropertyChangeListenerProxy objects.
See Also:
EventListenerProxy
Since:
1.4/**
 * A class which extends the <code>EventListenerProxy</code> specifically
 * for adding a named <code>PropertyChangeListener</code>. Instances of
 * this class can be added as <code>PropertyChangeListener</code> to
 * an object.
 * <p>
 * If the object has a <code>getPropertyChangeListeners()</code>
 * method then the array returned could be a mixture of
 * <code>PropertyChangeListener</code> and
 * <code>PropertyChangeListenerProxy</code> objects.
 *
 * @see java.util.EventListenerProxy
 * @since 1.4
 */
public class PropertyChangeListenerProxy extends java.util.EventListenerProxy
        implements PropertyChangeListener {

    private String propertyName;

    
Constructor which binds the PropertyChangeListener to a specific
property.
Params:
listener – The listener object
propertyName – The name of the property to listen on./**
     * Constructor which binds the PropertyChangeListener to a specific
     * property.
     *
     * @param listener The listener object
     * @param propertyName The name of the property to listen on.
     */
    public PropertyChangeListenerProxy(String propertyName,
            PropertyChangeListener listener) {
        // XXX - msd NOTE: I changed the order of the arguments so that it's
        // similar to PropertyChangeSupport.addPropertyChangeListener(String,
        // PropertyChangeListener);
        super(listener);
        this.propertyName = propertyName;
    }

    
Forwards the property change event to the listener delegate.
Params:
evt – the property change event/**
     * Forwards the property change event to the listener delegate.
     *
     * @param evt the property change event
     */
    public void propertyChange(PropertyChangeEvent evt) {
        ((PropertyChangeListener)getListener()).propertyChange(evt);
    }

    
Returns the name of the named property associated with the
listener.
/**
     * Returns the name of the named property associated with the
     * listener.
     */
    public String getPropertyName() {
        return propertyName;
    }
}