/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
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*
*
* Copyright 2008-2010 Sun Microsystems, Inc.
* Portions Copyright 2011-2013 ForgeRock AS
*/
package org.opends.server.replication.plugin;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import org.opends.server.replication.common.ChangeNumber;
import org.opends.server.types.Attribute;
import org.opends.server.types.AttributeType;
import org.opends.server.types.AttributeValue;
import org.opends.server.types.Entry;
import org.opends.server.types.Modification;
import org.opends.server.types.ModificationType;
/**
* This class is used to store historical information for single valued
* attributes.
* One object of this type is created for each attribute that was changed in
* the entry.
* It allows to record the last time a given value was added,
* and the last time the whole attribute was deleted.
*/
public class AttrHistoricalSingle extends AttrHistorical
{
/** Last time when the attribute was deleted. */
private ChangeNumber deleteTime = null;
/** Last time when a value was added. */
private ChangeNumber addTime = null;
/** Last added value. */
private AttributeValue value = null;
/**
* last operation applied. This is only used for multiple mods on the same
* single valued attribute in the same modification.
*/
private HistAttrModificationKey lastMod = null;
/**
* {@inheritDoc}
*/
@Override
public ChangeNumber getDeleteTime()
{
return this.deleteTime;
}
/**
* {@inheritDoc}
*/
@Override
public Map<AttrValueHistorical,AttrValueHistorical> getValuesHistorical()
{
if (addTime == null)
{
return Collections.emptyMap();
}
else
{
AttrValueHistorical val = new AttrValueHistorical(value, addTime, null);
return Collections.singletonMap(val, val);
}
}
/**
* {@inheritDoc}
*/
@Override
public void processLocalOrNonConflictModification(ChangeNumber changeNumber,
Modification mod)
{
AttributeValue newValue = null;
Attribute modAttr = mod.getAttribute();
if (modAttr != null && !modAttr.isEmpty())
{
newValue = modAttr.iterator().next();
}
switch (mod.getModificationType())
{
case DELETE:
this.addTime = null;
this.deleteTime = changeNumber;
this.value = newValue;
lastMod = HistAttrModificationKey.DEL;
break;
case ADD:
this.addTime = changeNumber;
this.value = newValue;
lastMod = HistAttrModificationKey.ADD;
break;
case REPLACE:
if (newValue == null)
{
// REPLACE with null value is actually a DELETE
this.addTime = null;
this.deleteTime = changeNumber;
this.value = null;
lastMod = HistAttrModificationKey.DEL;
}
else
{
this.deleteTime = addTime = changeNumber;
lastMod = HistAttrModificationKey.REPL;
}
this.value = newValue;
break;
case INCREMENT:
/* FIXME : we should update ChangeNumber */
break;
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean replayOperation(Iterator<Modification> modsIterator,
ChangeNumber changeNumber, Entry modifiedEntry, Modification mod)
{
boolean conflict = false;
AttributeValue newValue = null;
Attribute modAttr = mod.getAttribute();
if (modAttr != null && !modAttr.isEmpty())
{
newValue = modAttr.iterator().next();
}
switch (mod.getModificationType())
{
case DELETE:
if (changeNumber.newer(addTime))
{
if (newValue == null || newValue.equals(value) || value == null)
{
if (changeNumber.newer(deleteTime))
{
deleteTime = changeNumber;
}
AttributeType type = modAttr.getAttributeType();
if (!modifiedEntry.hasAttribute(type))
{
conflict = true;
modsIterator.remove();
}
else if ((newValue != null) &&
(!modifiedEntry.hasValue(type, modAttr.getOptions(), newValue)))
{
conflict = true;
modsIterator.remove();
}
else
{
addTime = null;
lastMod = HistAttrModificationKey.DEL;
value = null;
}
}
else
{
conflict = true;
modsIterator.remove();
}
}
else if (changeNumber.equals(addTime))
{
if ((lastMod == HistAttrModificationKey.ADD)
|| (lastMod == HistAttrModificationKey.REPL))
{
if (changeNumber.newer(deleteTime))
{
deleteTime = changeNumber;
}
addTime = null;
lastMod = HistAttrModificationKey.DEL;
value = null;
}
else
{
conflict = true;
modsIterator.remove();
}
}
else
{
conflict = true;
modsIterator.remove();
}
break;
case ADD:
if (changeNumber.newerOrEquals(deleteTime) && changeNumber.older(addTime))
{
conflict = true;
mod.setModificationType(ModificationType.REPLACE);
addTime = changeNumber;
value = newValue;
lastMod = HistAttrModificationKey.REPL;
}
else
{
if (changeNumber.newerOrEquals(deleteTime)
&& ((addTime == null ) || addTime.older(deleteTime)))
{
// no conflict : don't do anything beside setting the addTime
addTime = changeNumber;
value = newValue;
lastMod = HistAttrModificationKey.ADD;
}
else
{
// Case where changeNumber = addTime = deleteTime
if (changeNumber.equals(deleteTime)
&& changeNumber.equals(addTime)
&& (lastMod == HistAttrModificationKey.DEL))
{
// No conflict, record the new value.
value = newValue;
lastMod = HistAttrModificationKey.ADD;
}
else
{
conflict = true;
modsIterator.remove();
}
}
}
break;
case REPLACE:
if (changeNumber.older(deleteTime))
{
conflict = true;
modsIterator.remove();
}
else
{
if (newValue == null)
{
addTime = null;
value = newValue;
deleteTime = changeNumber;
lastMod = HistAttrModificationKey.DEL;
}
else
{
addTime = changeNumber;
value = newValue;
deleteTime = changeNumber;
lastMod = HistAttrModificationKey.REPL;
}
}
break;
case INCREMENT:
/* FIXME : we should update ChangeNumber */
break;
}
return conflict;
}
/**
* {@inheritDoc}
*/
@Override
public void assign(HistAttrModificationKey histKey,
AttributeValue value, ChangeNumber cn)
{
switch (histKey)
{
case ADD:
this.addTime = cn;
this.value = value;
break;
case DEL:
this.deleteTime = cn;
if (value != null)
this.value = value;
break;
case REPL:
this.addTime = this.deleteTime = cn;
if (value != null)
this.value = value;
break;
case DELATTR:
this.deleteTime = cn;
break;
}
}
}