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.
   */
  
  /*
   *    InstanceCounter.java
   *    Copyright (C) 1999 University of Waikato, Hamilton, New Zealand
   *
   */
  
  package weka.gui.streams;
  
  import weka.core.Instance;
  import weka.core.Instances;
  
  import java.awt.Color;
  
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  
  /** 
   * A bean that counts instances streamed to it.
   *
   * @author Len Trigg (trigg@cs.waikato.ac.nz)
   * @version $Revision: 1.5 $
   */
  public class InstanceCounter
    extends JPanel
    implements InstanceListener {
  
    /** for serialization */
    private static final long serialVersionUID = -6084967152645935934L;
    
    private JLabel m_Count_Lab;
    private int m_Count;
    private boolean m_Debug;
  
    public void input(Instance instance) throws Exception {
      
      if (m_Debug) {
        System.err.println("InstanceCounter::input(" + instance +")");
      }
      m_Count++;
      m_Count_Lab.setText(""+m_Count+" instances");
      repaint();
    }
    
    public void inputFormat(Instances instanceInfo) {
      
      if (m_Debug) {
        System.err.println("InstanceCounter::inputFormat()");
      }
      Instances inputInstances = new Instances(instanceInfo,0);
      m_Count = 0;
      m_Count_Lab.setText(""+m_Count+" instances");
    }
  
    public void setDebug(boolean debug) {
      
      m_Debug = debug;
    }
    
    public boolean getDebug() {
      
      return m_Debug;
    }
  
    public InstanceCounter() {
      
      m_Count = 0;
      m_Count_Lab = new JLabel("no instances");
      add(m_Count_Lab);
      //    setSize(60,40);
      setBackground(Color.lightGray);
    }
  
    public void instanceProduced(InstanceEvent e) {
      
      Object source = e.getSource();
      if (source instanceof InstanceProducer) { 
        try {
  	InstanceProducer a = (InstanceProducer) source;
  	switch (e.getID()) {
  	case InstanceEvent.FORMAT_AVAILABLE:
  	  inputFormat(a.outputFormat());
  	  break;
  	case InstanceEvent.INSTANCE_AVAILABLE:
  	  input(a.outputPeek());
  	  break;
  	case InstanceEvent.BATCH_FINISHED:
  	  if (m_Debug)
  	    System.err.println("InstanceCounter::instanceProduced() - End of instance batch");
  	  break;
  	default:
  	  System.err.println("InstanceCounter::instanceProduced() - unknown event type");
  	  break;
  	}
        } catch (Exception ex) {
  	System.err.println(ex.getMessage());
        }
      } else {
        System.err.println("InstanceCounter::instanceProduced() - Unknown source object type");
      }
    }
  }
  
  
  
  
  
  
  
  
  