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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.cdo.internal.common.revision.cache.lru;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.spi.common.InternalCDORevision;
import java.text.MessageFormat;
/**
* @author Eike Stepper
*/
public class RevisionHolder
{
private RevisionHolder prev;
private RevisionHolder next;
private InternalCDORevision revision;
public RevisionHolder(InternalCDORevision revision)
{
setRevision(revision);
}
public CDOID getID()
{
return revision.getID();
}
public int getVersion()
{
return revision.getVersion();
}
public long getCreated()
{
return revision.getCreated();
}
public long getRevised()
{
return revision.getRevised();
}
public boolean isCurrent()
{
return getRevised() == CDORevision.UNSPECIFIED_DATE;
}
public boolean isValid(long timeStamp)
{
return (getRevised() == CDORevision.UNSPECIFIED_DATE || getRevised() >= timeStamp) && timeStamp >= getCreated();
}
/**
* Returns:
* <ul>
* <li>-1 if the revision is valid *before* the timestamp
* <li>0 if the revision is valid *at* the timestamp
* <li>1 if the revision is valid *after* the timestamp
* </ul>
*/
public int compareTo(long timeStamp)
{
if (timeStamp < getCreated())
{
return 1;
}
long revised = getRevised();
if (revised != CDORevision.UNSPECIFIED_DATE && revised < timeStamp)
{
return -1;
}
return 0;
}
public RevisionHolder getPrev()
{
return prev;
}
public void setPrev(RevisionHolder prev)
{
this.prev = prev;
}
public RevisionHolder getNext()
{
return next;
}
public void setNext(RevisionHolder next)
{
this.next = next;
}
public boolean isLoaded()
{
return revision != null;
}
public InternalCDORevision getRevision()
{
return revision;
}
public void setRevision(InternalCDORevision revision)
{
this.revision = revision;
}
@Override
public String toString()
{
return MessageFormat.format("RevisionHolder[{0}]", revision);
}
}
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