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/*
* Copyright (c) 2008-2012, 2014-2016, 2019 Eike Stepper (Loehne, 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:
* Simon McDuff - initial API and implementation
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.internal.common.revision.delta;
import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDeltaVisitor;
import org.eclipse.emf.cdo.common.revision.delta.CDOSetFeatureDelta;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDOFeatureDelta.ListTargetAdding;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import java.io.IOException;
import java.text.MessageFormat;
/**
* @author Simon McDuff
*/
public class CDOSetFeatureDeltaImpl extends CDOSingleValueFeatureDeltaImpl implements CDOSetFeatureDelta, ListTargetAdding
{
private static final ThreadLocal<Boolean> TRANSFER_OLD_VALUE = new ThreadLocal<>();
private Object oldValue = UNKNOWN_VALUE;
public CDOSetFeatureDeltaImpl(EStructuralFeature feature, int index, Object value)
{
super(feature, index, value);
}
public CDOSetFeatureDeltaImpl(EStructuralFeature feature, int index, Object value, Object oldValue)
{
super(feature, index, value);
this.oldValue = oldValue;
}
public CDOSetFeatureDeltaImpl(CDODataInput in, EClass eClass) throws IOException
{
super(in, eClass);
if (TRANSFER_OLD_VALUE.get() == Boolean.TRUE)
{
oldValue = readValue(in, eClass);
}
}
@Override
public void write(CDODataOutput out, EClass eClass) throws IOException
{
super.write(out, eClass);
if (TRANSFER_OLD_VALUE.get() == Boolean.TRUE)
{
writeValue(out, eClass, oldValue);
}
}
@Override
public Type getType()
{
return Type.SET;
}
@Override
public CDOFeatureDelta copy()
{
return new CDOSetFeatureDeltaImpl(getFeature(), getIndex(), getValue(), getOldValue());
}
@Override
public Object applyTo(CDORevision revision)
{
EStructuralFeature feature = getFeature();
int index = getIndex();
Object value = getValue();
InternalCDORevision internalRevision = (InternalCDORevision)revision;
return internalRevision.set(feature, index, value);
}
@Override
public void accept(CDOFeatureDeltaVisitor visitor)
{
visitor.visit(this);
}
@Override
public Object getOldValue()
{
return oldValue;
}
public void setOldValue(Object oldValue)
{
this.oldValue = oldValue;
}
@Override
protected String toStringAdditional()
{
return super.toStringAdditional() + MessageFormat.format(", oldValue={0}", oldValue); //$NON-NLS-1$
}
public static void transferOldValue(boolean on)
{
if (on)
{
TRANSFER_OLD_VALUE.set(Boolean.TRUE);
}
else
{
TRANSFER_OLD_VALUE.remove();
}
}
}
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