FeatureMapPropertyHandler.java

/**
 * <copyright>
 *
 * Copyright (c) 2005, 2006, 2007, 2008 Springsite BV (The Netherlands) 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
 *
 * Contributors:
 *   Martin Taal
 * </copyright>
 *
 * $Id: FeatureMapPropertyHandler.java,v 1.8 2009/03/15 08:09:22 mtaal Exp $
 */

package org.eclipse.emf.teneo.hibernate.mapping.property;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.util.FeatureMap;
import org.eclipse.emf.ecore.util.FeatureMapUtil;
import org.eclipse.emf.teneo.extension.ExtensionPoint;
import org.eclipse.emf.teneo.hibernate.mapping.elist.HibernateFeatureMapEntry;
import org.eclipse.emf.teneo.hibernate.mapping.elist.HibernatePersistableFeatureMap;
import org.eclipse.emf.teneo.util.AssertUtil;
import org.eclipse.emf.teneo.util.StoreUtil;

/**
 * Implements the accessor for EMF FeatureMap members for Hibernate. Overrides
 * the createPersistableList to create a HibernatePersistableFeatureMap instead
 * of a normal list.
 * 
 * @author <a href="mailto:mtaal@elver.org">Martin Taal</a>
 * @version $Revision: 1.8 $
 */
@SuppressWarnings("unchecked")
public class FeatureMapPropertyHandler extends EListPropertyHandler implements
		ExtensionPoint {
	/**
	 * Generated Serial Version ID
	 */
	private static final long serialVersionUID = -5220024660708935714L;

	/** Initialize this instance */
	public void initialize(EStructuralFeature eFeature) {
		super.initialize(eFeature, false, false);
		AssertUtil.assertTrue("Is not a featuremap feature "
				+ StoreUtil.toString(eFeature), FeatureMapUtil
				.isFeatureMap(eFeature));
	}

	/** Create method can be overridden */
	@Override
	protected EList createPersistableList(InternalEObject target,
			EStructuralFeature estruct, List list) {
		return new HibernatePersistableFeatureMap(target, estruct, list);
	}

	// replaces all entries in a featuremap with a persistable one
	@Override
	protected List<Object> processList(Object list) {
		final List<Object> result = new ArrayList<Object>();

		final FeatureMap featureMap = (FeatureMap) list;
		for (FeatureMap.Entry entry : featureMap) {
			final HibernateFeatureMapEntry fme = new HibernateFeatureMapEntry();
			fme.setFeatureValue(entry.getEStructuralFeature(),
					entry.getValue(), (FeatureMap.Internal) list);
			result.add(fme);
		}
		return result;
	}

}