void onAssert ( nsIRDFDataSource dataSource , nsIRDFResource source , nsIRDFResource property , nsIRDFNode target )

This method is called whenever a new assertion is made in the data source

Arguments:

dataSource: the datasource that is issuing the notification.

source: the subject of the assertion

property: the predicate of the assertion

target: the object of the assertion

void onBeginUpdateBatch ( nsIRDFDataSource dataSource )

This method is called when a datasource is about to send several notifications at once. The observer can use this as a cue to optimize its behavior. The observer can expect the datasource to call endUpdateBatch() when the group of notifications has completed.

Arguments:

dataSource: the datasource that is going to be issuing the notifications.

void onChange ( nsIRDFDataSource dataSource , nsIRDFResource source , nsIRDFResource property , nsIRDFNode oldTarget , nsIRDFNode newTarget )

This method is called when the object of an assertion changes from one value to another.

Arguments:

dataSource: the datasource that is issuing the notification.

source: the subject of the assertion

property: the predicate of the assertion

oldTarget: the old object of the assertion

newTarget: the new object of the assertion

void onEndUpdateBatch ( nsIRDFDataSource dataSource )

This method is called when a datasource has completed issuing a notification group.

Arguments:

dataSource: the datasource that has finished issuing a group of notifications

void onMove ( nsIRDFDataSource dataSource , nsIRDFResource oldSource , nsIRDFResource newSource , nsIRDFResource property , nsIRDFNode target )

This method is called when the subject of an assertion changes from one value to another.

Arguments:

dataSource: the datasource that is issuing the notification.

oldSource: the old subject of the assertion

newSource: the new subject of the assertion

property: the predicate of the assertion

target: the object of the assertion

void onUnassert ( nsIRDFDataSource dataSource , nsIRDFResource source , nsIRDFResource property , nsIRDFNode target )

This method is called whenever an assertion is removed from the data source

Arguments:

dataSource: the datasource that is issuing the notification.

source: the subject of the assertion

property: the predicate of the assertion

target: the object of the assertion