com.vaadin.event.dd.acceptcriteria
Class SourceIsTarget

java.lang.Object
  com.vaadin.event.dd.acceptcriteria.ClientSideCriterion
      com.vaadin.event.dd.acceptcriteria.SourceIsTarget

All Implemented Interfaces:

AcceptCriterion, java.io.Serializable

public class SourceIsTarget
extends ClientSideCriterion

A criterion that ensures the drag source is the same as drop target. Eg. Tree or Table could support only re-ordering of items, but no Transferables coming outside.

Note! Class is singleton, use get() method to get the instance.

Since:

6.3

See Also:

Serialized Form

Method Summary

boolean	accept(DragAndDropEvent dragEvent) Validates the data in event to be appropriate for the DropHandler.drop(DragAndDropEvent) method.
static SourceIsTarget	get()

Methods inherited from class com.vaadin.event.dd.acceptcriteria.ClientSideCriterion

getIdentifier, isClientSideVerifiable, paint, paintContent, paintResponse

Methods inherited from class java.lang.Object

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

Method Detail

accept

public boolean accept(DragAndDropEvent dragEvent)

Description copied from interface: AcceptCriterion

Validates the data in event to be appropriate for the DropHandler.drop(DragAndDropEvent) method.

Note that even if your criterion is validated on client side, you should always validate the data on server side too.

Returns:

get

public static SourceIsTarget get()