org.eclipse.graphiti.pattern
Class UpdateFeatureForPattern

java.lang.Object
  org.eclipse.graphiti.features.impl.AbstractFeature
      org.eclipse.graphiti.features.impl.AbstractUpdateFeature
          org.eclipse.graphiti.pattern.UpdateFeatureForPattern

All Implemented Interfaces:

ICustomUndoableFeature, IFeature, IFeatureProviderHolder, IUpdateFeature, IUpdate, IDescription, IName

public class UpdateFeatureForPattern
extends AbstractUpdateFeature
implements ICustomUndoableFeature

This feature wraps the update functionality of a pattern for calls of the Graphiti framework. Clients should not need to use this class directly.

Field Summary

private IUpdate

pattern

Constructor Summary

UpdateFeatureForPattern(IFeatureProvider featureProvider, IUpdate pattern)
Creates a new UpdateFeatureForPattern.

Method Summary

boolean	canRedo(IContext context) Decides if the processed feature can be re-done.
boolean	canUndo(IContext context) Decides if the current feature can be undone - this is the undo of the execute operation.
boolean	canUpdate(IUpdateContext context) Checks whether the values of the current pictogram element of the given context can be updated.
void	redo(IContext context) This method will be called to actually do the work needed for redo.
void	undo(IContext context) This method will be called to actually do the work needed for undo.
boolean	update(IUpdateContext context) Updates the pictogram element.
IReason	updateNeeded(IUpdateContext context) Check whether the values in the pictogram element are up to date, that means whether the graphics algorithm of this pictogram element contain the latest values from the business objects.

Methods inherited from class org.eclipse.graphiti.features.impl.AbstractUpdateFeature

canExecute, canUpdatePictogramElement, execute, getDescription, getName, resizeShape, updatePictogramElement, updatePictogramElementNeeded

Methods inherited from class org.eclipse.graphiti.features.impl.AbstractFeature

addGraphicalRepresentation, getAllBusinessObjectsForPictogramElement, getBusinessObjectForPictogramElement, getDiagram, getDiagramBehavior, getDiagramEditor, getFeatureProvider, getProgressCallback, getUserDecision, hasDoneChanges, isAvailable, layoutPictogramElement, link, link, manageColor, manageColor, manageDefaultFont, manageFont, manageFont, setProgressCallback, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.graphiti.features.IFeature

hasDoneChanges, isAvailable

Methods inherited from interface org.eclipse.graphiti.features.IFeatureProviderHolder

getFeatureProvider

Field Detail

pattern

private IUpdate pattern

Constructor Detail

UpdateFeatureForPattern

public UpdateFeatureForPattern(IFeatureProvider featureProvider,
                               IUpdate pattern)

Creates a new UpdateFeatureForPattern.

Parameters:

featureProvider - the feature provider

pattern - the pattern

Method Detail

canUpdate

public boolean canUpdate(IUpdateContext context)

Description copied from interface: IUpdate

Checks whether the values of the current pictogram element of the given context can be updated.

Specified by:

canUpdate in interface IUpdate

Parameters:

context - the context

Returns:

true if update is possible

updateNeeded

public IReason updateNeeded(IUpdateContext context)

Description copied from interface: IUpdate

Check whether the values in the pictogram element are up to date, that means whether the graphics algorithm of this pictogram element contain the latest values from the business objects.

Specified by:

updateNeeded in interface IUpdate

Parameters:

context - the context

Returns:

true if parts of the pictogram model needs to be updated with the latest values from the business model

update

public boolean update(IUpdateContext context)

Description copied from interface: IUpdate

Updates the pictogram element. It copies the latest values from the business model to the graphics algorithm of this pictogram elements.

Specified by:

update in interface IUpdate

Parameters:

context - the context

Returns:

true, if update process was successfull

canUndo

public boolean canUndo(IContext context)

Description copied from interface: IFeature

Decides if the current feature can be undone - this is the undo of the execute operation.

Specified by:

canUndo in interface ICustomUndoableFeature

Specified by:

canUndo in interface IFeature

Overrides:

canUndo in class AbstractFeature

Parameters:

context - this is the general input for this method

Returns:

true if the feature can be undone, false if not

See Also:

IContext

undo

public void undo(IContext context)

Description copied from interface: ICustomUndoableFeature

This method will be called to actually do the work needed for undo. Customers may revert their non-EMF changes done by the feature here.

Specified by:

undo in interface ICustomUndoableFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.8

canRedo

public boolean canRedo(IContext context)

Description copied from interface: ICustomUndoableFeature

Decides if the processed feature can be re-done.

Note that as soon as any feature reports false here, also all consecutive entries in the command stack are no longer reachable for redo.

Specified by:

canRedo in interface ICustomUndoableFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Returns:

true if the feature can be re-done, false if not

Since:

0.8

redo

public void redo(IContext context)

Description copied from interface: ICustomUndoableFeature

This method will be called to actually do the work needed for redo. Customers may re-apply their non-EMF changes done by the feature here. (Usually it might be sufficient to delegate to the execution method of the feature.)

Specified by:

redo in interface ICustomUndoableFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.8