ActionScript 2.0 Components Language Reference

Delta interface

ActionScript Interface Name mx.data.components.datasetclasses.Delta

The Delta interface provides access to the transfer object, collection, and transfer object-level changes. With this interface you can access the new and previous values in a transfer object. For example, if the delta packet was obtained from a data set, each delta would represent an added, edited, or deleted row.

NOTE

The Delta interface is supported only if you are working in a document that specifies ActionScript 2.0 in its Publish Settings.

The Delta interface also provides access to messages returned by the associated server-side process. For more information on client-server interactions, see RDBMSResolver component.

Use the Delta interface to examine the delta packet before sending changes to the server and to review messages returned from server-side processing.

Method summary for the Delta interface

The following table lists the methods of the Delta interface.

Method	Description
`Delta.addDeltaItem()`	Adds the specified DeltaItem instance.
`Delta.getChangeList()`	Returns an array of changes made to the current item.
`Delta.getDeltaPacket()`	Returns the delta packet that contains the delta.
`Delta.getId()`	Returns the unique ID of the current item within the DeltaPacket collection.
`Delta.getItemByName()`	Returns the specified DeltaItem object.
`Delta.getMessage()`	Returns the message associated with the current item.
`Delta.getOperation()`	Returns the operation that was performed on the current item within the original collection.
`Delta.getSource()`	Returns the transfer object on which the changes were performed.

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