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/*******************************************************************************
* Copyright (c) 2013 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.emf.compare.ide.ui.internal.logical;
import java.util.Collections;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.compare.ide.internal.utils.SyncResourceSet;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.resource.Resource;
/**
* This particular resource set will construct a dependency graph between the resources it loads, without
* actually keeping them in memory. The graph can be later queried in order to determine the subgraph
* corresponding to the dependencies of one given resource.
*
* @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
*/
public class DependencyResourceSet extends SyncResourceSet {
/** Keeps track of the dependency tree discovered through this resource set. */
private final Graph<URI> graph = new Graph<URI>();
/**
* Returns an iterable over all the URIs that compose the logical model of the given one, whether they are
* parents of children of the resource at that location. Note that only resources located in the workspace
* are considered.
*
* @param uri
* Uri we need the dependency graph for.
* @return An iterable over the logical model of <code>uri</code>.
*/
public Iterable<URI> getDependencyGraph(URI uri) {
return graph.getSubgraphContaining(uri);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.ide.internal.utils.SyncResourceSet#loadResource(org.eclipse.emf.common.util.URI)
*/
@Override
protected Resource loadResource(URI uri) {
Resource loaded = super.loadResource(uri);
graph.add(loaded.getURI());
return loaded;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.ide.internal.utils.SyncResourceSet#resolveCrossReference(org.eclipse.emf.ecore.resource.Resource,
* org.eclipse.emf.ecore.EObject)
*/
@Override
protected void resolveCrossReference(Resource resource, EObject proxy) {
super.resolveCrossReference(resource, proxy);
URI parent = resource.getURI();
URI child = ((InternalEObject)proxy).eProxyURI().trimFragment();
if (parent.isPlatformResource() && child.isPlatformResource()) {
graph.createConnections(parent, Collections.singleton(child));
}
}
}
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