eu.esdihumboldt.hale.ui.common.graph.content.SimpleCellContentProvider.java Source code

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Here is the source code for eu.esdihumboldt.hale.ui.common.graph.content.SimpleCellContentProvider.java

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/*
 * Copyright (c) 2012 Data Harmonisation Panel
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     HUMBOLDT EU Integrated Project #030962
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.ui.common.graph.content;

import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.zest.core.viewers.IGraphContentProvider;

import com.google.common.collect.Iterables;
import com.google.common.collect.ListMultimap;

import eu.esdihumboldt.hale.common.align.model.Alignment;
import eu.esdihumboldt.hale.common.align.model.Cell;
import eu.esdihumboldt.hale.common.align.model.Entity;

/**
 * Graph content provider that models cells as edges. Supports an
 * {@link Alignment}, a {@link Cell} or an {@link Iterable} of {@link Cell}s as
 * input.
 * 
 * @author Simon Templer
 */
@Deprecated
public class SimpleCellContentProvider implements IGraphContentProvider {

    /**
     * @see IContentProvider#dispose()
     */
    @Override
    public void dispose() {
        // do nothing
    }

    /**
     * @see IContentProvider#inputChanged(Viewer, Object, Object)
     */
    @Override
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        // do nothing
    }

    /**
     * @see IGraphContentProvider#getSource(Object)
     */
    @Override
    public Object getSource(Object rel) {
        if (rel instanceof Cell) {
            Cell cell = (Cell) rel;

            return getEntity(cell.getSource());
        }

        return null;
    }

    /**
     * @see IGraphContentProvider#getDestination(Object)
     */
    @Override
    public Object getDestination(Object rel) {
        if (rel instanceof Cell) {
            Cell cell = (Cell) rel;

            return getEntity(cell.getTarget());
        }

        return null;
    }

    private Object getEntity(ListMultimap<String, ? extends Entity> entities) {
        if (entities.isEmpty()) {
            return null;
        }

        // FIXME what about the other entities?!
        return entities.values().iterator().next();
    }

    /**
     * @see IGraphContentProvider#getElements(Object)
     */
    @Override
    public Object[] getElements(Object input) {
        // FIXME what about cells that refer to multiple source or target
        // entities?!

        if (input instanceof Alignment) {
            return ((Alignment) input).getCells().toArray();
        }

        if (input instanceof Cell) {
            return new Object[] { input };
        }

        if (input instanceof Iterable<?>) {
            return Iterables.toArray((Iterable<?>) input, Object.class);
        }

        return null;
    }

}