com.synflow.cx.resource.CxResourceDescriptionManager.java Source code

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Here is the source code for com.synflow.cx.resource.CxResourceDescriptionManager.java

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/*******************************************************************************
 * Copyright (c) 2012-2014 Synflow SAS.
 * 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:
 *    Matthieu Wipliez - initial API and implementation and/or initial documentation
 *******************************************************************************/
package com.synflow.cx.resource;

import java.util.Collection;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.resource.IResourceDescription;
import org.eclipse.xtext.resource.IResourceDescription.Delta;
import org.eclipse.xtext.resource.IResourceDescription.Manager.AllChangeAware;
import org.eclipse.xtext.resource.IResourceDescriptions;
import org.eclipse.xtext.resource.impl.DefaultResourceDescriptionManager;

import com.google.common.collect.Iterables;
import com.google.inject.Inject;
import com.synflow.cx.cx.CxEntity;
import com.synflow.cx.cx.CxPackage.Literals;
import com.synflow.cx.cx.Inst;
import com.synflow.cx.cx.Instantiable;
import com.synflow.cx.cx.Network;
import com.synflow.cx.instantiation.IInstantiator;

/**
 * This class describes a resource description manager.
 * 
 * @author Matthieu Wipliez
 * 
 */
public class CxResourceDescriptionManager extends DefaultResourceDescriptionManager implements AllChangeAware {

    @Inject
    private IInstantiator instantiator;

    @Override
    public boolean isAffectedByAny(Collection<Delta> deltas, IResourceDescription candidate,
            IResourceDescriptions context) throws IllegalArgumentException {
        for (Delta delta : deltas) {
            IResourceDescription resDesc = delta.getNew();
            if (resDesc == null) {
                // ignore deleted/closed resources
                continue;
            }

            if (!Iterables.isEmpty(candidate.getExportedObjectsByType(Literals.BUNDLE))) {
                // a candidate is a bundle, is it loaded by the deltas?
                if (isAffected(getImportedNames(resDesc), candidate)) {
                    return true;
                }
            }

            // check instantiator to see if necessary to revalidate specialized sub-entities
            for (IEObjectDescription objDesc : resDesc.getExportedObjectsByType(Literals.NETWORK)) {
                CxEntity entity = instantiator.getEntity(objDesc.getEObjectURI());
                if (entity != null) {
                    Network network = (Network) entity;
                    if (isAffected(network, candidate)) {
                        return true;
                    }
                }
            }
        }

        return isAffected(deltas, candidate, context);
    }

    private boolean isAffected(Network network, IResourceDescription candidate) {
        for (Inst inst : network.getInstances()) {
            Instantiable entity = inst.getEntity();
            if (entity != null) {
                URI uri = EcoreUtil.getURI(entity);
                if (candidate.getURI().equals(uri.trimFragment())) {
                    // candidate is being instantiated
                    if (instantiator.isSpecialized(uri)) {
                        return true;
                    }
                }
            }
        }
        return false;
    }

}