/*
 *
 *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
 *  *
 *  *  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.
 *  *
 *  * For more information: http://www.orientechnologies.com
 *
 */

package com.orientechnologies.orient.core.storage.impl.local.paginated.wal;

import com.orientechnologies.common.serialization.types.OLongSerializer;

/**
 * @author Andrey Lomakin
 * @since 30.04.13
 */
public class OFuzzyCheckpointStartRecord extends OAbstractCheckPointStartRecord {
  private OLogSequenceNumber lsn;
  private OLogSequenceNumber flushedLsn;

  public OFuzzyCheckpointStartRecord() {
  }

  public OFuzzyCheckpointStartRecord(OLogSequenceNumber previousCheckpoint, OLogSequenceNumber flushedLsn) {
    super(previousCheckpoint);

    this.flushedLsn = flushedLsn;
  }

  @Override
  public int toStream(byte[] content, int offset) {
    offset = super.toStream(content, offset);

    OLongSerializer.INSTANCE.serializeNative(flushedLsn.getSegment(), content, offset);
    offset += OLongSerializer.LONG_SIZE;

    OLongSerializer.INSTANCE.serializeNative(flushedLsn.getPosition(), content, offset);
    offset += OLongSerializer.LONG_SIZE;

    return offset;
  }

  @Override
  public int fromStream(byte[] content, int offset) {
    offset = super.fromStream(content, offset);

    long segment = OLongSerializer.INSTANCE.deserializeNative(content, offset);
    offset += OLongSerializer.LONG_SIZE;

    long position = OLongSerializer.INSTANCE.deserializeNative(content, offset);
    offset += OLongSerializer.LONG_SIZE;

    flushedLsn = new OLogSequenceNumber(segment, position);

    return offset;
  }

  @Override
  public int serializedSize() {
    return super.serializedSize() + 2 * OLongSerializer.LONG_SIZE;
  }

  public OLogSequenceNumber getFlushedLsn() {
    return flushedLsn;
  }

  @Override
  public OLogSequenceNumber getLsn() {
    return lsn;
  }

  @Override
  public void setLsn(OLogSequenceNumber lsn) {
    this.lsn = lsn;
  }

  @Override
  public String toString() {
    return "OFuzzyCheckpointStartRecord{" + "lsn=" + lsn + "} " + super.toString();
  }
}