| 1 | package de.ugoe.cs.swe.bnftools.utils;
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| 2 |
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| 3 | import java.util.Iterator;
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| 4 |
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| 5 | import org.eclipse.emf.common.util.URI;
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| 6 | import org.eclipse.emf.ecore.EObject;
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| 7 | import org.eclipse.emf.ecore.util.EcoreUtil;
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| 8 | import org.eclipse.jface.text.ITextSelection;
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| 9 | import org.eclipse.xtext.resource.EObjectAtOffsetHelper;
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| 10 | import org.eclipse.xtext.resource.IEObjectDescription;
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| 11 | import org.eclipse.xtext.resource.IResourceDescription;
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| 12 | import org.eclipse.xtext.resource.IResourceDescriptions;
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| 13 | import org.eclipse.xtext.resource.XtextResource;
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| 14 | import org.eclipse.xtext.util.concurrent.IUnitOfWork;
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| 15 |
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| 16 | import com.google.common.base.Predicate;
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| 17 | import com.google.common.collect.Iterables;
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| 18 |
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| 19 | public class EObjectSelectionResolver implements
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| 20 | IUnitOfWork<IEObjectDescription, XtextResource> {
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| 21 | private final ITextSelection selection;
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| 22 | private IResourceDescriptions resourceDescriptions;
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| 23 |
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| 24 | public EObjectSelectionResolver(ITextSelection selection,
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| 25 | IResourceDescriptions resourceDescriptions) {
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| 26 | this.selection = selection;
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| 27 | this.resourceDescriptions = resourceDescriptions;
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| 28 | }
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| 29 |
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| 30 | public IEObjectDescription exec(XtextResource state) throws Exception {
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| 31 | EObject element = EObjectAtOffsetHelper.resolveElementAt(state,
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| 32 | selection.getOffset(), null);
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| 33 | if (element != null) {
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| 34 | final URI eObjectURI = EcoreUtil.getURI(element);
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| 35 | IResourceDescription resourceDescription = resourceDescriptions
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| 36 | .getResourceDescription(eObjectURI.trimFragment());
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| 37 | if (resourceDescription != null) {
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| 38 | Iterator<IEObjectDescription> eObjectDescriptions = Iterables
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| 39 | .filter(resourceDescription.getExportedObjects(),
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| 40 | new Predicate<IEObjectDescription>() {
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| 41 | public boolean apply(
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| 42 | IEObjectDescription input) {
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| 43 | return input.getEObjectURI().equals(
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| 44 | eObjectURI);
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| 45 | }
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| 46 | }).iterator();
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| 47 | if (eObjectDescriptions.hasNext()) {
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| 48 | return eObjectDescriptions.next();
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| 49 | }
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| 50 | }
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| 51 | }
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| 52 | return null;
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| 53 | }
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| 54 | } |
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