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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You
 * may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.cache.versions;

import com.gemstone.gemfire.internal.cache.persistence.DiskStoreID;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;

/**
 * A region version vector for regions with persistent data. This region
 * version vector uses the persistent disk store UUID as the member id.
 * @author dsmith
 *
 */
public class DiskRegionVersionVector extends RegionVersionVector {

  /** for deserialization */
  public DiskRegionVersionVector() throws IOException, ClassNotFoundException {
    super();
  }

  public DiskRegionVersionVector(DiskStoreID ownerId) {
    super(ownerId);
  }
  
  

  @Override
  public void recordVersion(DiskStoreID member, long version) {
    //TODO - RVV - This is a temporary check to make sure we get
    //an exception if we try to add a non disk store id to this vector
    super.recordVersion(member, version);
  }


  @Override
  public void recordGCVersion(DiskStoreID mbr, long regionVersion) {
    //TODO - RVV - This is a temporary check to make sure we get
    //an exception if we try to add a non disk store id to this vector
    super.recordGCVersion(mbr, regionVersion);
  }

  public DiskRegionVersionVector(DiskStoreID ownerId,
      ConcurrentHashMap> vector, long version,
      ConcurrentHashMap gcVersions, long gcVersion,
      boolean singleMember, 
      RegionVersionHolder localExceptions) {
    super(ownerId, vector, version, gcVersions, gcVersion, singleMember,
        localExceptions);
  }

  @Override
  protected RegionVersionVector createCopy(DiskStoreID ownerId,
      ConcurrentHashMap> vector, long version,
      ConcurrentHashMap gcVersions, long gcVersion,
      boolean singleMember, 
      RegionVersionHolder localExceptions) {
    return new DiskRegionVersionVector(ownerId, vector, version,
        gcVersions, gcVersion, singleMember, localExceptions);
  }

  @Override
  protected void writeMember(DiskStoreID member, DataOutput out) throws IOException {
    out.writeLong(member.getMostSignificantBits());
    out.writeLong(member.getLeastSignificantBits());
    
  }

  @Override
  protected DiskStoreID readMember(DataInput in) throws IOException {
    long mostSignificantBits = in.readLong();
    long leastSignificantBits = in.readLong();
    DiskStoreID member = new DiskStoreID(mostSignificantBits, leastSignificantBits);
    return member;
  }

  @Override
  public int getDSFID() {
    return PERSISTENT_RVV;
  }
}