| /* |
| * Copyright (c) 2008-2012, 2014 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.CDOList; |
| 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 Object applyTo(CDORevision revision) |
| { |
| EStructuralFeature feature = getFeature(); |
| |
| InternalCDORevision internalRevision = (InternalCDORevision)revision; |
| CDOList list = internalRevision.getList(feature); |
| return list.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); |
| } |
| |
| } |