/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2010 Sun Microsystems, Inc.
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*/
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package org.opends.server.replication.plugin;
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import java.util.ArrayList;
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import java.util.Iterator;
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import org.opends.server.replication.common.ChangeNumber;
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import org.opends.server.types.AttributeType;
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import org.opends.server.types.AttributeValue;
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import org.opends.server.types.Entry;
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import org.opends.server.types.Modification;
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/**
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* This class store historical information for a provided attribute.
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*/
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public abstract class AttrHistorical
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{
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/**
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* This method will be called when replaying an operation.
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* It should use whatever historical information is stored in this class
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* to solve the conflict and modify the mod and the mods iterator accordingly
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*
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* @param modsIterator The iterator on the mods from which the mod is\
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* extracted.
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* @param changeNumber The changeNumber associated to the operation.
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* @param modifiedEntry The entry modified by this operation.
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* @param mod The modification.
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*
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* @return a boolean indicating if a conflict was detected.
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*/
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public abstract boolean replayOperation(
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Iterator<Modification> modsIterator, ChangeNumber changeNumber,
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Entry modifiedEntry, Modification mod);
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/**
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* This method calculate the historical information and update the hist
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* attribute to store the historical information for modify operation that
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* does not conflict with previous operation.
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* This is the usual path and should therefore be optimized.
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*
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* It does not check if the operation to process is conflicting or not with
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* previous operations. The caller is responsible for this.
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*
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* @param changeNumber The changeNumber of the operation to process
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* @param mod The modify operation to process.
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*/
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public abstract void processLocalOrNonConflictModification(
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ChangeNumber changeNumber, Modification mod);
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/**
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* Create a new object from a provided attribute type. Historical is empty.
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*
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* @param type the provided attribute type.
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* @return a new AttributeInfo object.
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*/
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public static AttrHistorical createAttributeHistorical(
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AttributeType type)
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{
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if (type.isSingleValue())
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return new AttrHistoricalSingle();
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else
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return new AttrHistoricalMultiple();
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}
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/**
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* Get the List of ValueInfo for this attribute Info.
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*
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* @return the List of ValueInfo
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*/
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public abstract ArrayList<AttrValueHistorical> getValuesHistorical();
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/**
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* Returns the last time when this attribute was deleted.
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*
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* @return the last time when this attribute was deleted
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*/
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public abstract ChangeNumber getDeleteTime();
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/**
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* Assign the provided information to this object.
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*
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* @param histKey the key to assign.
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* @param value the associated value or null if there is no value;
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* @param cn the associated ChangeNumber.
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*/
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public abstract void assign(
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HistAttrModificationKey histKey, AttributeValue value, ChangeNumber cn);
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}
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