How to use

getReferenceDescriptions

method

in

org.eclipse.xtext.resource.IResourceDescription

public Iterable<IReferenceDescription> getReferenceDescriptions() {
  // find references was triggered - use up-to-date reference descriptions
  // the content of this copied description is updated as soon as the exported
  // objects of a resource change thus the default algorithm of the find 
  // references UI for the display string should work
  IResourceDescription snapShot = snapShotProvider.get();
  if (snapShot != null)
    return snapShot.getReferenceDescriptions();
  return Collections.emptyList();
}

public static void copyReferenceDescriptions(IResourceDescription from, ResourceDescriptionImpl result) {
  Iterator<IReferenceDescription> sourceReferenceDescriptions = from.getReferenceDescriptions().iterator();
  if (sourceReferenceDescriptions.hasNext()) {
    InternalEList<IReferenceDescription> targetReferenceDescriptions = (InternalEList<IReferenceDescription>) result.getReferenceDescriptions();
    do {
      targetReferenceDescriptions.addUnique(BuilderStateUtil.create(sourceReferenceDescriptions.next()));    
    } while(sourceReferenceDescriptions.hasNext());
  }
}

  /**
   * @since 2.4
   */
  public void findReferences(Set<URI> targetURIs, IResourceDescription resourceDescription, IAcceptor<IReferenceDescription> acceptor, IProgressMonitor monitor, ILocalResourceAccess localResourceAccess) {
    for (IReferenceDescription referenceDescription : resourceDescription.getReferenceDescriptions()) {
      if (targetURIs.contains(referenceDescription.getTargetEObjectUri())) {
        acceptor.accept(referenceDescription);
      }
    }
  }
}

/**
 * Collect the URIs of resources, that are referenced by the given description.
 * @return the list of referenced URIs. Never <code>null</code>.
 */
public Set<URI> collectOutgoingReferences(IResourceDescription description) {
  URI resourceURI = description.getURI();
  Set<URI> result = null;
  for(IReferenceDescription reference: description.getReferenceDescriptions()) {
    URI targetResource = reference.getTargetEObjectUri().trimFragment();
    if (!resourceURI.equals(targetResource)) {
      if (result == null)
        result = Sets.newHashSet(targetResource);
      else
        result.add(targetResource);
    }
  }
  if (result != null)
    return result;
  return Collections.emptySet();
}

} else {
  Iterable<IReferenceDescription> newReferenceDescriptions = delta.getNew()
      .getReferenceDescriptions();
  List<ReferenceSearchViewTreeNode> removedReferenceNodes = Lists.newArrayList();
  for (ReferenceSearchViewTreeNode referenceNode : rootNode.getChildren()) {

URI uri = resource.getURI();
for (IResourceDescription desc : descriptions.getAllResourceDescriptions()) {
  for (IReferenceDescription ref : desc.getReferenceDescriptions()) {
    URI targetURI = ref.getTargetEObjectUri();
    URI sourceEObjectUri = ref.getSourceEObjectUri();