content: /*
   *    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.
   */
  
  /*
   *    DataSetEvent.java
   *    Copyright (C) 2002 University of Waikato, Hamilton, New Zealand
   *
   */
  
  package weka.gui.beans;
  
  import weka.core.Instances;
  
  import java.util.EventObject;
  
  /**
   * Event encapsulating a data set
   *
   * @author <a href="mailto:mhall@cs.waikato.ac.nz">Mark Hall</a>
   * @version $Revision: 1.4 $
   * @see EventObject
   */
  public class DataSetEvent
    extends EventObject {
  
    /** for serialization */
    private static final long serialVersionUID = -5111218447577318057L;
  
    private Instances m_dataSet;
    private boolean m_structureOnly;
  
    public DataSetEvent(Object source, Instances dataSet) {
      super(source);
      m_dataSet = dataSet;
      if (m_dataSet != null && m_dataSet.numInstances() == 0) {
        m_structureOnly = true;
      }
    }
    
    /**
     * Return the instances of the data set
     *
     * @return an <code>Instances</code> value
     */
    public Instances getDataSet() {
      return m_dataSet;
    }
  
    /**
     * Returns true if the encapsulated instances
     * contain just header information
     *
     * @return true if only header information is
     * available in this DataSetEvent
     */
    public boolean isStructureOnly() {
      return m_structureOnly;
    }
  }
  