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/*
* Copyright (c) 2008-2012, 2015 Eike Stepper (Berlin, Germany) 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 - copied from CDORevisionPropertyHandler and adapted
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.server.internal.hibernate.tuplizer;
import org.eclipse.emf.cdo.common.revision.CDORevisionData;
import org.eclipse.emf.cdo.server.internal.hibernate.tuplizer.CDORevisionPropertyAccessor.CDORevisionSetter;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision;
import org.eclipse.emf.common.util.Enumerator;
import org.eclipse.emf.ecore.EEnum;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.teneo.PersistenceOptions;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.property.Getter;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.util.Map;
/**
* TODO How does this differ from {@link CDORevisionSetter}? Both needed?
*
* @author Martin Taal
*/
public class CDOPropertyGetter extends CDOPropertyHandler implements Getter
{
private static final long serialVersionUID = 1L;
private final boolean isEEnum;
private final EEnum eEnum;
private boolean handleUnsetAsNull = false;
public CDOPropertyGetter(CDORevisionTuplizer tuplizer, String propertyName)
{
super(tuplizer, propertyName);
if (getEStructuralFeature() != null)
{
isEEnum = getEStructuralFeature().getEType() instanceof EEnum;
if (isEEnum)
{
eEnum = (EEnum)getEStructuralFeature().getEType();
}
else
{
eEnum = null;
}
}
else
{
isEEnum = false;
eEnum = null;
}
}
public Object get(Object target) throws HibernateException
{
InternalCDORevision revision = (InternalCDORevision)target;
Object value = revision.getValue(getEStructuralFeature());
if (value == CDORevisionData.NIL)
{
// explicitly set to null
return null;
}
final EStructuralFeature eFeature = getEStructuralFeature();
if (value == null)
{
if (eFeature.getDefaultValue() == null)
{
return null;
}
// this happens when you don't set a value explicitly in CDO
// then null is passed while the user may expect the default
// value to be set.
if (useDefaultValue())
{
value = eFeature.getDefaultValue();
}
}
// hibernate sees eenums, CDO sees int
if (isEEnum && value != null)
{
if (value instanceof Enumerator)
{
return value;
}
return eEnum.getEEnumLiteral((Integer)value);
}
return value;
}
// see CDOPropertyGetter#useDefaultValue
private boolean useDefaultValue()
{
final EStructuralFeature eFeature = getEStructuralFeature();
return eFeature.isRequired() || !handleUnsetAsNull && eFeature.isUnsettable();
}
@SuppressWarnings("rawtypes")
public Object getForInsert(Object target, Map mergeMap, SessionImplementor session) throws HibernateException
{
return get(target);
}
public Method getMethod()
{
return null;
}
public String getMethodName()
{
return null;
}
public Member getMember()
{
return null;
}
@SuppressWarnings("rawtypes")
public Class getReturnType()
{
return Object.class;
}
@Override
public void setPersistenceOptions(PersistenceOptions persistenceOptions)
{
super.setPersistenceOptions(persistenceOptions);
handleUnsetAsNull = persistenceOptions.getHandleUnsetAsNull();
}
}
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