RemoteTermIdReference.java from Texai at Krugle

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/*
 * RemoteTermIdReference.java
 *
 * Created on April 23, 2007, 12:31 PM
 *
 * Description: Provides a means to reference KB objects in remote partitions.  Primitive int's 
 * are used as local term ids in order to save space and increase performance. 
 *
 * Copyright (C) April 23, 2007 Stephen L. Reed.
 *
 * This program is free software; you can redistribute it and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program;
 * if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package org.texai.kb.entity;

import com.sleepycat.persist.model.Entity;
import com.sleepycat.persist.model.PrimaryKey;
import com.sleepycat.persist.model.Relationship;
import com.sleepycat.persist.model.SecondaryKey;
import java.util.UUID;
import org.texai.util.ByteUtils;

/**
 *
 * @author reed
 */
@Entity
public class RemoteTermIdReference {
  
  /** the local database term ID */
  @PrimaryKey
  private int termId;                                      // NOPMD
  
  /** the UUID bytes which identity the remote KB partition */
  private byte[] kbPartitionUUIDBytes;                     // NOPMD
  
  /** the UUID bytes which identify the term within the remote KB partition */
  private byte[] uuidBytes;                                // NOPMD
  
  /** Creates a new instance of RemoteTermIdReference */
  public RemoteTermIdReference() {
    super();
  }
  
  /** Creates a new instance of RemoteTermIdReference.
   *
   * @param termId the local database term ID
   * @param kbPartitionUUID the UUID which identifies the remote KB partition
   * @param uuid the UUID which identifies the term within the remote KB partition
   */
  public RemoteTermIdReference(
          final int termId,
          final UUID kbPartitionUUID,
          final UUID uuid) {
    super();
    //Preconditions
    assert termId != 0 : "termId must not be 0";
    assert kbPartitionUUID != null : "kbPartitionUUID must not be null";
    assert uuid != null : "uuid must not be null";

    this.termId = termId;
    this.kbPartitionUUIDBytes = ByteUtils.toBytes(kbPartitionUUID);
    this.uuidBytes = ByteUtils.toBytes(uuid);
  }
  
  /** Gets the local database term ID.
   *
   * @return the local database term ID
   */
  public int getTermId() {
    return termId;
  }
  
  /** Gets the UUID which identifies the remote KB partition.
   *
   * @return the UUID which identifies the remote KB partition
   */
  public UUID getKBPartitionUUID() {
    return UUID.nameUUIDFromBytes(kbPartitionUUIDBytes);
  }
  
  /** Gets the UUID which identifies the term within the remote KB partition.
   *
   * @return the UUID which identifies the term within the remote KB partition
   */
  public UUID getUUID() {
    return UUID.nameUUIDFromBytes(uuidBytes);
  }
  

}
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