UnaryGAFInfo.java from Texai at Krugle

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/*
 * UnaryGAFInfo.java
 *
 * Created on October 24, 2006, 1:59 PM
 *
 * Description: Contains the specialized fields for UnaryGAF.
 *
 * 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.entity;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import javax.persistence.Transient;
import org.texai.kb.Constants;

/**
 * Entity class UnaryGAFInfo
 *
 * @author reed
 */
@Entity
public class UnaryGAFInfo extends AbstractGAFInfo implements Serializable {

  /**
   * Determines if a de-serialized file is compatible with this class.
   *
   * Maintainers must change this value if and only if the new version
   * of this class is not compatible with old versions. See Sun docs
   * for <a href=http://java.sun.com/products/jdk/1.1/docs/guide
   * /serialization/spec/version.doc.html> details. </a>
   *
   * Not necessary to include in first version of the class, but
   * included here as a reminder of its importance.
   */
  @Transient
  private static final long serialVersionUID = 1L;

  /** the unary ground atomic formula */
  @OneToOne
  private UnaryGAF unaryGAF;              // NOPMD

  /** the predicate
   * @serial
   */
  @ManyToOne(cascade=CascadeType.PERSIST)
  private AtomicTerm predicate;           // NOPMD

  /** the first argument
   * @serial
   */
  @ManyToOne(cascade=CascadeType.PERSIST)
  private AbstractTerm arg1;              // NOPMD

  /** Creates a new instance of UnaryGAFInfo */
  public UnaryGAFInfo() {
    super();
  }

  /**
   * Creates a new instance of UnaryGAFInfo.
   *
   * @param unaryGAF the unary ground atomic formula
   * @param predicate the predicate
   * @param args the arguments
   * @param context the context
   * @param strength the assertion strength
   * @param generatedPhrase the generated phrase for this ground atomic formula
   * @param creator the creator 
   * @param creationPurpose the creation purpose
   * @param creationTimePoint the creation time point
   */
  public UnaryGAFInfo(
          final UnaryGAF unaryGAF,
          final AtomicTerm predicate,
          final List<AbstractTerm> args,
          final AbstractReifiedTerm context,
          final Double strength,
          final String generatedPhrase,
          final AbstractReifiedTerm creator,
          final AbstractReifiedTerm creationPurpose,
          final TimePoint creationTimePoint) {
    super(
            context, 
            strength, 
            generatedPhrase, 
            creator, 
            creationPurpose, 
            creationTimePoint);
    //Preconditions
    assert unaryGAF != null : "unaryGAF must not be null";
    assert predicate != null : "predicate must not be null";
    assert args != null : "args must not be null";
    assert args.size() == Constants.UNARY_ARGS_SIZE : "unary GAF must have one argument " + args.toString();

    this.unaryGAF = unaryGAF;
    this.predicate = predicate;
    arg1 = args.get(Constants.ARG1_INDEX);
  }

  /** Gets the predicate.
   *
   * @return the predicate
   */
  public AtomicTerm getPredicate() {
    return predicate;
  }

  /** Gets the first argument
   *
   * @return the first argument
   */
  public AbstractTerm getArg1() {
    return arg1;
  }

  /** Returns the arguments.
   *
   * @return the arguments
   */
  public List<AbstractTerm> getArgs() {
    final List<AbstractTerm> args = new ArrayList<AbstractTerm>(Constants.UNARY_ARGS_SIZE);
    args.add(arg1);
    return args;
  }

  /** gets the unary ground atomic formula
   *
   * @return the unary ground atomic formula
   */
  public UnaryGAF getUnaryGAF() {
    return unaryGAF;
  }

  /** Returns a hash code value for the object.
   *
   * @return a hash code value for this object
   */
  @Override
  public int hashCode() {
    return getPredicate().hashCode() + getContext().hashCode() + getArgs().hashCode();
  }

  /**
   * Determines whether another object is equal to this object.
   *
   * @param object the reference object with which to compare
   * @return <code>true</code> if this object is the same as the argument;
   * <code>false</code> otherwise.
   */
  @Override
  public boolean equals(final Object object) {
    if (!(object instanceof UnaryGAFInfo)) {
      return false;
    }
    final UnaryGAFInfo that = (UnaryGAFInfo) object;
    return this.getPredicate().equals(that.getPredicate())
    && this.getContext().equals(that.getContext())
    && this.getArgs().equals(that.getArgs());
  }

}
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