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/**
* <copyright>
*
* Copyright (c) 2009 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 - Initial API and implementation
*
* </copyright>
*
* $Id: EAVSingleEReferenceValueHolder.java,v 1.5 2010/04/04 12:10:51 mtaal Exp $
*/
package org.eclipse.emf.teneo.hibernate.mapping.eav;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.DynamicEObjectImpl;
import org.eclipse.emf.teneo.annotations.pamodel.PAnnotatedEClass;
import org.eclipse.emf.teneo.hibernate.HbUtil;
import org.hibernate.mapping.PersistentClass;
/**
* Stores a single EReference value when the EReference is containment.
*
* @author <a href="mtaal@elver.org">Martin Taal</a>
*/
public class EAVSingleEReferenceValueHolder extends EAVValueHolder {
private EObject referenceValue;
private EObject eavObjectReference;
private EReference getEReference() {
return (EReference) getEStructuralFeature();
}
public void setValueInOwner(InternalEObject owner) {
final Object curValue = owner.eGet(getEStructuralFeature());
final int featureId = owner.eClass().getFeatureID(getEStructuralFeature());
if (curValue == referenceValue) {
// note that == works fine if the
// curValue and value have been read in the same jvm.
return; // do nothing in this case
}
if (getEReference().getEOpposite() != null
|| (owner instanceof DynamicEObjectImpl && getEReference().isContainment())) {
// these are handled a bit differently because
if (referenceValue == null) { // remove
// Note that the eInverseRemove is called on the target itself
// and the value is passed
// therefore the eReference featureid is passed and not the
// opposite
final NotificationChain nots = ((InternalEObject) owner).eInverseRemove(
(InternalEObject) curValue, featureId, getEReference().getEType().getInstanceClass(),
null);
if (nots != null) {
nots.dispatch();
}
} else {
final NotificationChain nots = ((InternalEObject) owner).eInverseAdd(
(InternalEObject) referenceValue, featureId, getEReference().getEType()
.getInstanceClass(), null);
if (nots != null) {
nots.dispatch();
}
}
} else {
owner.eSet(getEReference(), referenceValue);
}
}
public void set(Object value) {
setMandatoryValue(null);
referenceValue = (EObject) value;
if (referenceValue != null) {
setMandatoryValue(NOT_NULL_VALUE);
if (isEAVMapped(referenceValue.eClass())) {
setEavObjectReference(referenceValue);
}
} else {
setEavObjectReference(null);
}
}
public Object getValue() {
return getReferenceValue();
}
public Object get(InternalEObject owner) {
return referenceValue;
}
public EObject getReferenceValue() {
return referenceValue;
}
public void setReferenceValue(EObject referenceValue) {
this.referenceValue = referenceValue;
}
public EObject getEavObjectReference() {
return eavObjectReference;
}
public void setEavObjectReference(EObject eavObjectReference) {
this.eavObjectReference = eavObjectReference;
}
private boolean isEAVMapped(EClass eClass) {
try {
final PAnnotatedEClass paClass = getHbDataStore().getPaModel().getPAnnotated(eClass);
if (paClass.getEntity() == null) {
return false;
}
final String entityName = paClass.getEntity().getName();
final PersistentClass pc = getHbDataStore().getPersistentClass(entityName);
return HbUtil.isEAVMapped(pc);
} catch (IllegalArgumentException e) {
// not mapped
return false;
}
}
}
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