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/**
* <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: ManyAttributeMapper.java,v 1.27 2009/11/02 18:14:18 mtaal Exp $
*/
package org.eclipse.emf.teneo.hibernate.mapper;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.util.FeatureMapUtil;
import org.eclipse.emf.teneo.annotations.pamodel.PAnnotatedEAttribute;
import org.eclipse.emf.teneo.annotations.pamodel.PAnnotatedEReference;
import org.eclipse.emf.teneo.annotations.pannotation.JoinColumn;
import org.eclipse.emf.teneo.annotations.pannotation.JoinTable;
import org.eclipse.emf.teneo.annotations.pannotation.OneToMany;
import org.eclipse.emf.teneo.extension.ExtensionPoint;
import org.eclipse.emf.teneo.hibernate.hbmodel.HbAnnotatedEAttribute;
import org.eclipse.emf.teneo.hibernate.hbmodel.HbAnnotatedETypeElement;
import org.eclipse.emf.teneo.simpledom.Element;
/**
* Maps many valued attributes.
* <p>
* Assumes that the given {@link PAnnotatedEAttribute} is normal, i.e.
* <ul>
* <li>it is a {@link PAnnotatedEReference};
* <li>it has a {@link OneToMany} annotation;
* <li>oneToMany.getCascade() is ALL
* <li>oneToMany.getTargetEntity is not specified
* <li>the {@link OneToMany} annotation have the following attributes set:
* <li>TODO which is the meaning of a column annotation? Can it have one?
* </ul>
*
* @author <a href="mailto:mtaal at elver.org">Martin Taal</a>
*/
public class ManyAttributeMapper extends AbstractAssociationMapper implements ExtensionPoint {
/** The logger */
private static final Log log = LogFactory.getLog(ManyAttributeMapper.class);
/**
* Process a many=true EAttribute
*/
public void processManyAttribute(PAnnotatedEAttribute paAttribute) {
if (log.isDebugEnabled()) {
log.debug("Generating many valued attribute mapping for " + paAttribute);
}
final HbAnnotatedEAttribute hbAttribute = (HbAnnotatedEAttribute) paAttribute;
final EAttribute eattr = paAttribute.getModelEAttribute();
final boolean isArray = eattr.getEType().getInstanceClass() != null
&& eattr.getEType().getInstanceClass().isArray();
final Element collElement = addCollectionElement(paAttribute);
final Element keyElement = collElement.addElement("key");
final JoinTable jt = paAttribute.getCollectionTable() != null ? paAttribute
.getCollectionTable() : paAttribute.getJoinTable();
final List<JoinColumn> jcs = jt != null && jt.getJoinColumns().size() > 0 ? jt.getJoinColumns()
: (paAttribute.getJoinColumns() == null ? new ArrayList<JoinColumn>() : paAttribute
.getJoinColumns());
final OneToMany otm = paAttribute.getOneToMany();
addForeignKeyAttribute(keyElement, paAttribute);
if (jt != null) {
addJoinTable(hbAttribute, collElement, keyElement, jt);
addKeyColumns(hbAttribute, keyElement, jcs);
} else {
// TODO should we also add joinColumns annotation?
addKeyColumns(hbAttribute, keyElement, jcs);
}
if (!otm.isIndexed() && isArray) {
log.warn("One to many is not indexed but this is an array, force=ing index column!");
}
if ((otm.isIndexed() || isArray) && hbAttribute.getHbIdBag() == null) {
addListIndex(collElement, paAttribute);
}
if (!isArray) {
addFetchType(collElement, otm.getFetch());
}
final boolean addOrphanDelete = FeatureMapUtil.isFeatureMap(paAttribute.getModelEAttribute());
addCascades(collElement,
getCascades(hbAttribute.getHbCascade(), otm.getCascade(), addOrphanDelete), addOrphanDelete);
if (FeatureMapUtil.isFeatureMap(paAttribute.getModelEAttribute())) {
if (getHbmContext().getPersistenceOptions().isMapFeatureMapAsComponent()) {
final Element curElement = getHbmContext().getCurrent();
FeatureMapMapping fmm = new FeatureMapMapping(getHbmContext(), paAttribute);
Element element = collElement.addElement("composite-element").addAttribute("class",
getHbmContext().getFeatureMapEntryClassName());
fmm.setCompositeElement(element);
fmm.process();
getHbmContext().setCurrent(curElement);
// composite-element class="DeliveryAttempt">
} else {
FeatureMapMapping fmm = new FeatureMapMapping(getHbmContext(), paAttribute);
getHbmContext().addFeatureMapMapper(fmm);
collElement.addElement("one-to-many").addAttribute("entity-name", fmm.getEntityName());
}
} else {
addElementElement(collElement, paAttribute, getColumns(paAttribute), otm.getTargetEntity());
}
addAccessor(collElement);
mapFilter(collElement, ((HbAnnotatedETypeElement) paAttribute).getFilter());
}
}
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