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/***************************************************************************
* Copyright (c) 2004 - 2009 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.internal.cdo.transaction;
import org.eclipse.emf.cdo.transaction.CDOSavepoint;
import org.eclipse.emf.cdo.transaction.CDOUserTransaction;
/**
* @author Simon McDuff
* @since 2.0
*/
public abstract class AbstractSavepoint implements CDOSavepoint
{
private CDOUserTransaction userTransaction;
private AbstractSavepoint previousSavepoint;
private AbstractSavepoint nextSavepoint;
public AbstractSavepoint(CDOUserTransaction transaction, AbstractSavepoint lastSavepoint)
{
userTransaction = transaction;
previousSavepoint = lastSavepoint;
if (previousSavepoint != null)
{
previousSavepoint.setNextSavepoint(this);
}
}
public void setPreviousSavepoint(AbstractSavepoint previousSavepoint)
{
this.previousSavepoint = previousSavepoint;
}
public void setNextSavepoint(AbstractSavepoint nextSavepoint)
{
this.nextSavepoint = nextSavepoint;
}
public CDOSavepoint getNextSavepoint()
{
return nextSavepoint;
}
public CDOSavepoint getPreviousSavepoint()
{
return previousSavepoint;
}
public AbstractSavepoint getFirstSavePoint()
{
return previousSavepoint != null ? previousSavepoint.getFirstSavePoint() : this;
}
public CDOUserTransaction getUserTransaction()
{
return userTransaction;
}
public boolean isValid()
{
CDOSavepoint lastSavepoint = getUserTransaction().getLastSavepoint();
for (CDOSavepoint savepoint = lastSavepoint; savepoint != null; savepoint = savepoint.getPreviousSavepoint())
{
if (savepoint == this)
{
return true;
}
}
return false;
}
public void rollback()
{
getUserTransaction().rollback(this);
}
}
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