SimpleConstruction.java from Texai at Krugle

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/*
 * SimpleConstruction.java
 *
 * Created on January 17, 2007, 1:06 PM
 *
 * Description: Provides a construction to decorate another constituent, typically an instance contains word sense
 * information for a constitutent that is a word.
 *
 * Copyright (C) 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.grammar.domainEntity;

import org.texai.grammar.Constituent;
import org.texai.grammar.understanding.ActiveConstituent;
import org.texai.grammar.understanding.ActiveSimpleConstruction;
import org.texai.kb.Constants;
import org.texai.kb.ejb.entity.AtomicTerm;
import org.texai.kb.persistence.DomainEntity;
import org.texai.kb.persistence.DomainProperty;

/**
 *
 * @author reed
 */
@DomainEntity(typeOf={Constants.TERM_NAME_LINGUISTIC_OBJECT_TYPE}, subClassOf={Constants.TERM_NAME_CXG_COMPOSED_CONSTRUCTION})
public class SimpleConstruction extends AbstractComposedConstruction {
  
  /** the simple constituent adapter */
  @DomainProperty(name="cxgSimpleConstituentAdapter", domain=Constants.TERM_NAME_CXG_COMPOSED_CONSTRUCTION)
  private ConstituentAdapter simpleConstituentAdapter;
  
  /** Creates a new instance of SimpleConstruction. */
  public SimpleConstruction() {
    super();
    setLoggerUsingClass(this.getClass());
  }
  
  /** Creates a new instance of SimpleConstruction.
   *
   * @param name the construction name that identifies this instance
   * @param naturalLanguage the natural language to which this construction applies
   */
  public SimpleConstruction(final String name, final AtomicTerm naturalLanguage) {
    super(name, naturalLanguage);
    setLoggerUsingClass(this.getClass());
  }
  
  /**
   * Sets the simple constituent adapter.
   * 
   * @param simpleConstituentAdapter the simple constituent adapter
   */
  public void setSimpleConstituentAdapter(final ConstituentAdapter simpleConstituentAdapter) {
    //Preconditions
    assert simpleConstituentAdapter != null : "simpleConstituentAdapter must not be null";
    
    this.simpleConstituentAdapter = simpleConstituentAdapter;
  }
  
  /** Gets the simple constituent adapter.
   *
   * @return the simple constituent adapter
   */
  public ConstituentAdapter getSimpleConstituentAdapter() {
    return simpleConstituentAdapter;
  }
  
  /** Gets the simple construction constituent.
   *
   * @return the simple construction constituent
   */
  public Constituent getSimpleConstituent() {
    return simpleConstituentAdapter.getConstituent();
  }
  
 /** Decorates this construction with an active construction that contains the 
   * behavior and transient state for parsing text.
   *
   * @return an ActiveSimpleConstruction that decorates this object
   */
  public ActiveConstituent decorate() {
    return new ActiveSimpleConstruction(this);
  }
  
  /** Returns the constituent adapter that contains the given child constituent.
   *
   * @param constituent the given child constituent
   * @return the constituent adapter that contains the given child constituent, or null if not found 
   */
  public ConstituentAdapter findAdapter(final Constituent constituent) {
    //Preconditions
    assert constituent != null : "constituent must not be null";
    assert simpleConstituentAdapter != null : "simpleConstituentAdapter must not be null";
    
    if (simpleConstituentAdapter.getConstituent().equals(constituent)) {
      return simpleConstituentAdapter;
    } else {
      return null;
    }
  }
  
  /** Returns a hash code for this object.
   *
   * @return a hash code for this object
   */
  @Override
  public int hashCode() {
    if (getTermId() == null) {
      return super.hashCode();
    } else {
      return getTermId().hashCode();
    }
  }
  
  /** Returns whether the given object is equal to this object.
   *
   * @param obj the given object
   * @return whether the given object is equal to this object
   */
  @Override
  public boolean equals(final Object obj) {
    if (obj instanceof SimpleConstruction) {
      final SimpleConstruction that = (SimpleConstruction) obj;
      return this.getTermId().equals(that.getTermId());
    } else {
      return false;
    } 
  }
  
}
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