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/*
* Copyright (c) 2004 - 2011 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:
* 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.CDOMoveFeatureDelta;
import org.eclipse.emf.cdo.spi.common.revision.CDOReferenceAdjuster;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDOFeatureDelta.ListIndexAffecting;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDOFeatureDelta.WithIndex;
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 CDOMoveFeatureDeltaImpl extends CDOFeatureDeltaImpl implements CDOMoveFeatureDelta, ListIndexAffecting,
WithIndex
{
private int oldPosition;
private int newPosition;
private Object value;
public CDOMoveFeatureDeltaImpl(EStructuralFeature feature, int newPosition, int oldPosition)
{
super(feature);
this.newPosition = newPosition;
this.oldPosition = oldPosition;
value = UNKNOWN_VALUE;
}
public CDOMoveFeatureDeltaImpl(CDODataInput in, EClass eClass) throws IOException
{
super(in, eClass);
newPosition = in.readInt();
oldPosition = in.readInt();
value = UNKNOWN_VALUE;
}
@Override
public void write(CDODataOutput out, EClass eClass) throws IOException
{
super.write(out, eClass);
out.writeInt(newPosition);
out.writeInt(oldPosition);
}
public int getNewPosition()
{
return newPosition;
}
public int getOldPosition()
{
return oldPosition;
}
public Type getType()
{
return Type.MOVE;
}
public Object getValue()
{
return value;
}
public void setValue(Object value)
{
this.value = value;
}
public void setOldPosition(int oldPosition)
{
this.oldPosition = oldPosition;
}
public void setNewPosition(int newPosition)
{
this.newPosition = newPosition;
}
public CDOFeatureDelta copy()
{
CDOFeatureDelta copy = new CDOMoveFeatureDeltaImpl(getFeature(), newPosition, oldPosition);
((CDOMoveFeatureDeltaImpl)copy).setValue(getValue());
return copy;
}
public void apply(CDORevision revision)
{
((InternalCDORevision)revision).getList(getFeature()).move(newPosition, oldPosition);
}
public void affectIndices(ListTargetAdding[] source, int[] indices)
{
if (oldPosition < newPosition)
{
for (int i = 1; i <= indices[0]; i++)
{
if (oldPosition < indices[i] && indices[i] <= newPosition)
{
--indices[i];
}
else if (indices[i] == oldPosition)
{
indices[i] = newPosition;
}
}
}
else if (newPosition < oldPosition)
{
for (int i = 1; i <= indices[0]; i++)
{
if (newPosition <= indices[i] && indices[i] < oldPosition)
{
++indices[i];
}
else if (indices[i] == oldPosition)
{
indices[i] = newPosition;
}
}
}
}
public void accept(CDOFeatureDeltaVisitor visitor)
{
visitor.visit(this);
}
public void adjustAfterAddition(int index)
{
if (index <= oldPosition)
{
++oldPosition;
}
if (index <= newPosition)
{
++newPosition;
}
}
public void adjustAfterRemoval(int index)
{
if (index < oldPosition && oldPosition > 0)
{
--oldPosition;
}
// Index fix for moves from left to right.
if (oldPosition < newPosition)
{
--index;
}
if (index < newPosition && newPosition > 0)
{
--newPosition;
}
}
@Override
public boolean adjustReferences(CDOReferenceAdjuster adjuster)
{
return false;
}
@Override
public boolean isStructurallyEqual(Object obj)
{
if (!super.isStructurallyEqual(obj))
{
return false;
}
CDOMoveFeatureDelta that = (CDOMoveFeatureDelta)obj;
return oldPosition == that.getOldPosition() && newPosition == that.getNewPosition();
}
@Override
protected String toStringAdditional()
{
return MessageFormat.format("from={0}, to={1}, value={2}", oldPosition, newPosition, value);
}
}
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