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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.common.revision.delta;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EStructuralFeature;
/**
* Represents a change delta between two values of a single {@link EStructuralFeature feature}.
*
* @author Simon McDuff
* @noextend This interface is not intended to be extended by clients.
* @noimplement This interface is not intended to be implemented by clients.
* @apiviz.landmark
* @apiviz.has {@link org.eclipse.emf.ecore.EStructuralFeature}
* @apiviz.has {@link CDOFeatureDelta.Type}
*/
public interface CDOFeatureDelta
{
/**
* @since 4.0
*/
public static final int NO_INDEX = Notification.NO_INDEX;
/**
* @since 3.0
*/
public static final Object UNKNOWN_VALUE = new Object()
{
@Override
public String toString()
{
return "UNKNOWN"; //$NON-NLS-1$
}
};
public Type getType();
/**
* @since 2.0
*/
public EStructuralFeature getFeature();
public void apply(CDORevision revision);
public void accept(CDOFeatureDeltaVisitor visitor);
/**
* @since 3.0
*/
public CDOFeatureDelta copy();
/**
* @since 4.0
*/
public boolean isStructurallyEqual(Object obj);
/**
* Enumerates the possible types of {@link CDOFeatureDelta feature deltas}.
*
* @author Simon McDuff
*/
public enum Type
{
ADD, REMOVE, CLEAR, MOVE, SET, UNSET, LIST, CONTAINER
}
}
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