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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.uml.modelrepair.ui.providers;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.util.EContentsEList;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
public class ResourceLinksContentProvider implements ITreeContentProvider {
protected TreeViewer viewer;
protected ResourceSet input;
protected Map<Resource, Set<URI>> allLinks;
public void dispose() {
allLinks = null;
input = null;
viewer = null;
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
this.viewer = (TreeViewer)viewer;
if(newInput instanceof ResourceSet) {
this.input = (ResourceSet)newInput;
} else {
this.input = null;
}
allLinks = null;
}
public Object[] getElements(Object inputElement) {
return allLinks().keySet().toArray();
}
public Object[] getChildren(Object parentElement) {
if(parentElement instanceof Resource) {
Set<URI> uris = allLinks.get(parentElement);
if(uris == null) {
return new Object[0];
}
return uris.toArray();
}
return new Object[0];
}
public Object getParent(Object element) {
return null;
}
public boolean hasChildren(Object element) {
if(element instanceof Resource) {
Resource resource = (Resource)element;
EditingDomain domain = TransactionalEditingDomain.Factory.INSTANCE.getEditingDomain(resource.getResourceSet());
if(EMFHelper.isReadOnly(resource, domain)) {
return false;
}
}
return getChildren(element).length > 0;
}
protected Map<Resource, Set<URI>> allLinks() {
//Do not cache, to recompute the dependencies after a refresh
//This may be expensive. TODO: Manually clean the cache before refresh.
// if(allLinks != null) {
// return allLinks;
// }
allLinks = new HashMap<Resource, Set<URI>>();
if(input == null) {
return allLinks;
}
for(Resource resource : input.getResources()) {
Set<URI> allReferencedURIs = new HashSet<URI>();
allLinks.put(resource, allReferencedURIs);
Iterator<EObject> allContents = resource.getAllContents();
while(allContents.hasNext()) {
EObject nextElement = allContents.next();
List<EObject> allReferencedEObjects = nextElement.eCrossReferences();
EContentsEList.FeatureIterator<EObject> iterator = (EContentsEList.FeatureIterator<EObject>)allReferencedEObjects.iterator();
while(iterator.hasNext()) {
EObject referencedEObject = iterator.next();
if(referencedEObject.eIsProxy()) {
allReferencedURIs.add(EcoreUtil.getURI(referencedEObject).trimFragment());
} else {
if(referencedEObject.eResource() == null) {
continue;
}
//Exclude local references
if(referencedEObject.eResource() != resource) {
if(iterator.feature().isTransient()) {
continue;
}
allReferencedURIs.add(referencedEObject.eResource().getURI());
}
}
}
}
}
Iterator<Resource> removeEmptyLinks = allLinks.keySet().iterator();
while(removeEmptyLinks.hasNext()) {
Resource current = removeEmptyLinks.next();
if(allLinks.get(current).isEmpty()) {
removeEmptyLinks.remove();
}
}
return allLinks;
}
}
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