org.eclipse.emfforms.swt.internal.reference.table

Class DummyDomainExpander

java.lang.Object

org.eclipse.emfforms.swt.internal.reference.table.DummyDomainExpander

All Implemented Interfaces:

EMFFormsDMRSegmentExpander

public class DummyDomainExpander
extends Object
implements EMFFormsDMRSegmentExpander

Dummy Domain expander doing nothing because we do not need to expand the extent segments.

Since:

1.22

Author:

Lucas Koehler

Field Summary

Fields inherited from interface org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRSegmentExpander

NOT_APPLICABLE

Method Summary

Modifier and Type	Method and Description
double	isApplicable(VDomainModelReferenceSegment segment) Returns how suitable this EMFFormsDMRSegmentExpander is for the given VDomainModelReferenceSegment.
boolean	needsToExpandLastSegment() Returns whether a supported segment needs to be expanded when it is the last segment of a VDomainModelReferenceSegment.
Optional<org.eclipse.emf.ecore.EObject>	prepareDomainObject(VDomainModelReferenceSegment segment, org.eclipse.emf.ecore.EObject domainObject) Prepares a domain object for the given VDomainModelReferenceSegment.

Methods inherited from class java.lang.Object

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

Method Detail

prepareDomainObject

public Optional<org.eclipse.emf.ecore.EObject> prepareDomainObject(VDomainModelReferenceSegment segment,
                                                                   org.eclipse.emf.ecore.EObject domainObject)
                                                            throws EMFFormsExpandingFailedException

Description copied from interface: EMFFormsDMRSegmentExpander

Prepares a domain object for the given VDomainModelReferenceSegment. Thereby, the feature defined by the segment is analyzed and if it is a reference, the missing target object will be created. Thereby, the segment is not changed. The target of the segment's feature is returned. This is the created EObject if it was created by this method or the already existing target of the segment's feature.

Example:
DMR: A -a-> B
The domain model is instance of A but does not reference an instance of B. The segment contains the feature 'a'.
=> An instance of B is created and referenced by the domain model. B is returned by this expander.

Specified by:

prepareDomainObject in interface EMFFormsDMRSegmentExpander

Parameters:

segment - The VDomainModelReferenceSegment for which the domain object should be prepared.

domainObject - The domain object to prepare.

Returns:

The new target of the segment's feature. If an EObject was created, it is returned, otherwise the already existing target is returned. May return nothing. If the given segment was not the DMR's last segment, this causes the DMR expansion process to fail.

Throws:

EMFFormsExpandingFailedException - if the domain expansion fails.

isApplicable

public double isApplicable(VDomainModelReferenceSegment segment)

Description copied from interface: EMFFormsDMRSegmentExpander

Returns how suitable this EMFFormsDMRSegmentExpander is for the given VDomainModelReferenceSegment.

Specified by:

isApplicable in interface EMFFormsDMRSegmentExpander

Parameters:

segment - The VDomainModelReferenceSegment for which an domain object should be prepared.

Returns:

a value indicating how suitable this EMFFormsDMRSegmentExpander is to expand a domain object for the given VDomainModelReferenceSegment. Returns NOT_APPLICABLE if it's not applicable.

needsToExpandLastSegment

public boolean needsToExpandLastSegment()

Description copied from interface: EMFFormsDMRSegmentExpander

Returns whether a supported segment needs to be expanded when it is the last segment of a VDomainModelReferenceSegment.

Specified by:

needsToExpandLastSegment in interface EMFFormsDMRSegmentExpander

Returns:

Whether the last segment needs to be expanded