org.eclipse.xtext.resource.impl.AbstractContainer.java Source code

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Here is the source code for org.eclipse.xtext.resource.impl.AbstractContainer.java

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/*******************************************************************************
 * Copyright (c) 2009 itemis AG (http://www.itemis.eu) and others.
 * 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
 *******************************************************************************/
package org.eclipse.xtext.resource.impl;

import java.util.Collections;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.xtext.EcoreUtil2;
import org.eclipse.xtext.resource.IContainer;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.resource.IResourceDescription;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;

/**
 * Abstract container implementation. Minimal clients have to implement
 * {@link #getResourceDescriptions()}.
 * 
 * @author Sebastian Zarnekow - Initial contribution and API
 */
public abstract class AbstractContainer extends AbstractCompoundSelectable implements IContainer {

    @Override
    protected Iterable<IResourceDescription> getSelectables() {
        return getResourceDescriptions();
    }

    @Override
    public int getResourceDescriptionCount() {
        return Iterables.size(getResourceDescriptions());
    }

    @Override
    public boolean hasResourceDescription(URI uri) {
        return getResourceDescription(uri) != null;
    }

    @Override
    public IResourceDescription getResourceDescription(final URI uri) {
        return Iterables.find(getResourceDescriptions(), new Predicate<IResourceDescription>() {
            @Override
            public boolean apply(IResourceDescription input) {
                return uri.equals(input.getURI());
            }
        }, null);
    }

    @Override
    public Iterable<IEObjectDescription> getExportedObjectsByObject(final EObject object) {
        URI resourceURI = EcoreUtil2.getPlatformResourceOrNormalizedURI(object).trimFragment();
        IResourceDescription description = getResourceDescription(resourceURI);
        if (description == null)
            return Collections.emptyList();
        return description.getExportedObjectsByObject(object);
    }

}