org.geotools.event
Class GTEventImpl

java.lang.Object
  java.util.EventObject
      org.geotools.event.GTEventImpl

All Implemented Interfaces:

GTEvent, java.io.Serializable

public class GTEventImpl

extends java.util.EventObject

implements GTEvent

Captures changes to Style.

The "delta" acts as a series of bread crumbs allowing you the listener to figure out what changed where. The Type answers that other peskey question: when.

You should be warned that deltas may also be "saved up" for a rainy day, this keeps user interfaces from being flooded with a cascade of events. The best example is a "macro" that makes a series of changes and only reports back a compound change resulting from the batch opperation.

Since:

2.2.M3

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.geotools.event.GTEvent

GTEvent.Type

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

GTEventImpl(GTRoot source)

GTEventImpl(GTRoot source, GTDelta delta)

GTEventImpl(GTRoot source, GTEvent.Type type, GTDelta delta)

Method Summary

GTDelta	getDelta() Returns a delta, rooted at style, describing the set of changes that happened.
GTEvent.Type	getType() Returns the type of event being reported.
void	setDelta(GTDelta delta)
void	setType(GTEvent.Type type)

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

Methods inherited from interface org.geotools.event.GTEvent

getSource

Constructor Detail

GTEventImpl

public GTEventImpl(GTRoot source)

GTEventImpl

public GTEventImpl(GTRoot source,
                   GTDelta delta)

GTEventImpl

public GTEventImpl(GTRoot source,
                   GTEvent.Type type,
                   GTDelta delta)

Method Detail

getDelta

public GTDelta getDelta()

Returns a delta, rooted at style, describing the set of changes that happened. Returns null if not applicable to this type of event.

Specified by:

getDelta in interface GTEvent

Returns:

the style delta, or null if not applicable

getType

public GTEvent.Type getType()

Returns the type of event being reported.

Specified by:

getType in interface GTEvent

Returns:

one of the event type constants

See Also:

#POST_CHANGE, #PRE_DELETE

setDelta

public void setDelta(GTDelta delta)

setType

public void setType(GTEvent.Type type)