AssociationEditorBean.java from Texai at Krugle

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/*
 * AssociationEditorBean.java
 *
 * Created on December 11, 2006, 1:11 PM
 *
 * Description: Edits propositions.
 *
 * Copyright (C) 2006 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.ejb.session.shared;

import com.sleepycat.je.DatabaseException;
import com.sleepycat.persist.EntityStore;
import com.sleepycat.persist.PrimaryIndex;
import java.util.Date;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import org.apache.log4j.Logger;
import org.texai.kb.Constants;
import org.texai.kb.entity.AtomicTerm;
import org.texai.kb.entity.BinaryGAF;
import org.texai.kb.entity.AbstractReifiedTerm;
import org.texai.kb.entity.AbstractTerm;
import org.texai.util.ByteUtils;
import org.texai.util.TexaiException;

/**
 *
 * @author reed
 */
@Stateless
public class AssociationEditorBean implements AssociationEditorLocal {
  
  /** the logger */
  private transient Logger logger;        // NOPMD
  
  /** the entity store */
  private EntityStore entityStore;
  
  /** the primary index for binary GAFS  */
  private transient PrimaryIndex<Integer, BinaryGAF> binaryGAFByTermId;
  
  /** Creates a new instance of AssociationEditorBean. */
  public AssociationEditorBean() {
    super();
    logger = Logger.getLogger(AssociationEditorBean.class.getName());
  }
  
  /**
   * Persists the given binary ground atomic formula.
   * 
   * @param binaryGAF the given binary ground atomic formula
   */
  public void editBinaryGAF(final BinaryGAF binaryGAF) {
    //Preconditions
    assert binaryGAF != null : "binaryGAF must not be null";
    assert binaryGAF.getTermId()  != 0 : "binaryGAF term id must not be zero";
    

    try {
      binaryGAFByTermId.putNoReturn(binaryGAF);
    } catch (final DatabaseException ex) {
      throw new TexaiException(ex);
    }
    getLogger().info("edited: " + binaryGAF);
  }

  /** Sets the entity store. 
   *
   * @param entityStore
   */
  public void setEntityStore(final EntityStore entityStore) {
    //Preconditions
    assert entityStore != null : "entityStore must not be null";
    
    this.entityStore = entityStore;
  }  
  
  /** Initializes the primary and secondary indicies. */
  public void initializeIndices() {
    //Preconditions
    assert entityStore != null : "entityStore must not be null";
    
    // primary indicies
    try {
      binaryGAFByTermId = entityStore.getPrimaryIndex(Integer.class, BinaryGAF.class);
    } catch (final DatabaseException ex) {
      throw new TexaiException(ex);
    }
    
    //Postconditions
    assert binaryGAFByTermId != null : "binaryGAFByTermId must not be null";
  }
  
  /** Gets the logger.
   *
   * @return the logger
   */
  private Logger getLogger() {
    if (logger == null) {
      logger = Logger.getLogger(TermFinderFacadeBean.class.getName());
    }
    return logger;
  }
    
}
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