org.topbraid.change
Class DeleteStatementChange

java.lang.Object
  org.topbraid.core.change.AbstractChange
      org.topbraid.change.DeleteStatementChange

All Implemented Interfaces:

IChange

public class DeleteStatementChange
extends AbstractChange

An IChange to delete an object from the values of a property at a given subject. This will remove the given triple and all depending triples, such as depending bnodes.

Author:

Holger Knublauch

Constructor Summary

DeleteStatementChange(com.hp.hpl.jena.rdf.model.Statement statement)

Method Summary

java.lang.String	check(ISession session) Checks if this can be executed and returns an error string if not.
void	execute(ISession session, org.eclipse.core.runtime.IProgressMonitor monitor) Executes the change.
ImageMetadata	getImageMetadata() Gets (optional) metadata to describe an image about this change.

Methods inherited from class org.topbraid.core.change.AbstractChange

getLabel, isNoop, setImage, setImage, setLabel

Methods inherited from class java.lang.Object

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

Constructor Detail

DeleteStatementChange

public DeleteStatementChange(com.hp.hpl.jena.rdf.model.Statement statement)

Method Detail

check

public java.lang.String check(ISession session)

Description copied from interface: IChange

Checks if this can be executed and returns an error string if not. This method is usually called by the execution environment prior to calling the IChange.execute(org.topbraid.core.session.ISession, org.eclipse.core.runtime.IProgressMonitor) method.

Specified by:

check in interface IChange

Overrides:

check in class AbstractChange

Parameters:

session - the session to check against

Returns:

null if the change can be performed, an error message otherwise

execute

public void execute(ISession session,
                    org.eclipse.core.runtime.IProgressMonitor monitor)

Description copied from interface: IChange

Executes the change. This should perform the changes to a Jena model. In case of an unexpected state, the method may throw an IllegalStateException.

Parameters:

session - the session to execute the change on

monitor - a progress monitor for longish operations (may be null)

getImageMetadata

public ImageMetadata getImageMetadata()

Description copied from interface: IChange

Gets (optional) metadata to describe an image about this change.

Specified by:

getImageMetadata in interface IChange

Overrides:

getImageMetadata in class AbstractChange

Returns:

the ImageMetadata or null