Class ITopologyClassEventsAdapter

  extended by com.esri.arcgis.geodatabase.ITopologyClassEventsAdapter
All Implemented Interfaces:
ITopologyClassEvents, Serializable, EventListener

public class ITopologyClassEventsAdapter
extends Object
implements ITopologyClassEvents

See Also:
Serialized Form

Constructor Summary
Method Summary
 void onValidate(ITopologyClassEventsOnValidateEvent theEvent)
          This event is fired when the topology containing the class is validated.
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public ITopologyClassEventsAdapter()
Method Detail


public void onValidate(ITopologyClassEventsOnValidateEvent theEvent)
                throws IOException,
This event is fired when the topology containing the class is validated.


The OnValidate event is fired each time a dirty area is validated in the topology in which the class is participating. Handlers are provided with an IGeometry object corresponding to the dirty areas that were validated. The IGeometry object may represent a single or multi-part polygon or a collection of polygons.

In some cases, using the OnValidate method on feature classes in a Topology may result in a situation where the Topology will always have a Dirty Area such as if the purpose of listening to the OnValidate event is to act on another feature class in the Topology and perform some action on the features in that class.

For example, an extension that listens to the OnValidate event in order to derive features for a feature class by aggregarting the features in the class that is validated. If the dervied features are in a feature class that is in the Topology, the result of the OnValidate event will be a Topology that will always contain a dirty area. The derived feature class should not be in the topology in order for this example to be applicable.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:
onValidate in interface ITopologyClassEvents
theEvent - The event
IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.