org.jscience.util
Class ChangeForwarder.Retyper

java.lang.Object
  org.jscience.util.ChangeForwarder
      org.jscience.util.ChangeForwarder.Retyper

All Implemented Interfaces:

java.util.EventListener, ChangeListener

Enclosing class:

ChangeForwarder

public static class ChangeForwarder.Retyper
extends ChangeForwarder

A ChangeForwarder that systematically uses a given type and wraps the old event.

Since:

1.4

Nested Class Summary

Nested classes/interfaces inherited from class org.jscience.util.ChangeForwarder

ChangeForwarder.Retyper

Nested classes/interfaces inherited from interface org.jscience.util.ChangeListener

ChangeListener.AlwaysVetoListener, ChangeListener.LoggingListener

Field Summary

Fields inherited from interface org.jscience.util.ChangeListener

ALWAYS_VETO, LOG_TO_OUT

Constructor Summary

ChangeForwarder.Retyper(java.lang.Object source, ChangeSupport changeSupport, ChangeType type)
Create a new Retyper for forwarding events.

Method Summary

protected ChangeEvent	generateEvent(ChangeEvent ce) Return the new event to represent the originating event ce.
ChangeType	getType()

Methods inherited from class org.jscience.util.ChangeForwarder

changeSupport, getSource, postChange, preChange

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeForwarder.Retyper

public ChangeForwarder.Retyper(java.lang.Object source,
                               ChangeSupport changeSupport,
                               ChangeType type)

Create a new Retyper for forwarding events.

Parameters:

source - the new source Object

changeSupport - the ChangeSupport managing the listeners

type - the new ChangeType

Method Detail

getType

public ChangeType getType()

generateEvent

protected ChangeEvent generateEvent(ChangeEvent ce)
                             throws ChangeVetoException

Description copied from class: ChangeForwarder

Return the new event to represent the originating event ce.

The returned ChangeEvent is the event that will be fired, and should be built from information in the original event. If it is null, then no event will be fired.

The default implementation just constructs a ChangeEvent of the same type that chains back to ce.

Overrides:

generateEvent in class ChangeForwarder

Parameters:

ce - the originating ChangeEvent

Returns:

a new ChangeEvent to pass on, or null if no event should be sent

Throws:

ChangeVetoException - if for any reason this event can't be handled