org.eclipse.xtext.resource
Class EObjectAtOffsetHelper

java.lang.Object
  org.eclipse.xtext.resource.EObjectAtOffsetHelper

public class EObjectAtOffsetHelper
extends java.lang.Object

Author:

Jan Koehnlein - Initial contribution and API, Holger Schill

Constructor Summary

EObjectAtOffsetHelper()

Method Summary

protected INode	findCrossReferenceNode(INode node)
org.eclipse.emf.ecore.EObject	getCrossReferencedElement(INode node)
INode	getCrossReferenceNode(XtextResource resource, ITextRegion region)
protected org.eclipse.emf.ecore.EObject	internalResolveElementAt(XtextResource resource, int offset, boolean containment)
protected boolean	isElementOfDatatypeRule(org.eclipse.emf.ecore.EObject grammarElement)
org.eclipse.emf.ecore.EObject	resolveContainedElementAt(XtextResource resource, int offset)
protected org.eclipse.emf.ecore.EObject	resolveCrossReferencedElement(INode node)
org.eclipse.emf.ecore.EObject	resolveCrossReferencedElementAt(XtextResource resource, int offset)
org.eclipse.emf.ecore.EObject	resolveElementAt(XtextResource resource, int offset)

Methods inherited from class java.lang.Object

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

Constructor Detail

EObjectAtOffsetHelper

public EObjectAtOffsetHelper()

Method Detail

resolveElementAt

public org.eclipse.emf.ecore.EObject resolveElementAt(XtextResource resource,
                                                      int offset)

Returns:

the declared or the referenced element next to the offset

resolveContainedElementAt

public org.eclipse.emf.ecore.EObject resolveContainedElementAt(XtextResource resource,
                                                               int offset)

Returns:

the declared element next to the offset

Since:

2.3

resolveCrossReferencedElementAt

public org.eclipse.emf.ecore.EObject resolveCrossReferencedElementAt(XtextResource resource,
                                                                     int offset)

Returns:

the cross referenced EObject under, right or left to the cursor (in that order) or null if there is no cross referenced object next to the offset.

getCrossReferenceNode

public INode getCrossReferenceNode(XtextResource resource,
                                   ITextRegion region)

Since:

2.1

getCrossReferencedElement

public org.eclipse.emf.ecore.EObject getCrossReferencedElement(INode node)

Parameters:

node - a node with an associated CrossReference grammar element.

Returns:

the EObject referenced by this node

Since:

2.1

findCrossReferenceNode

protected INode findCrossReferenceNode(INode node)

Parameters:

node - a node (possibly null)

Returns:

if the given node is part of a cross reference this method returns the node pointing to the CrossReference null if the passed node was a null reference or if the passed node is not part of a cross reference.

Since:

2.1

isElementOfDatatypeRule

protected boolean isElementOfDatatypeRule(org.eclipse.emf.ecore.EObject grammarElement)

Since:

2.1

internalResolveElementAt

protected org.eclipse.emf.ecore.EObject internalResolveElementAt(XtextResource resource,
                                                                 int offset,
                                                                 boolean containment)

resolveCrossReferencedElement

protected org.eclipse.emf.ecore.EObject resolveCrossReferencedElement(INode node)