Application: gvSIG desktop » gvSIG tools: ToolBox

package es.unex.sextante.gridStatistics.neighborhood.patternBase;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Set;

import es.unex.sextante.gridStatistics.base.NeighborhoodStatsBaseAlgorithm;

public abstract class PatternBaseAlgorithm

         extends

            NeighborhoodStatsBaseAlgorithm {

   protected int getNumberOfClasses() {

      int i;

      double dValue;

      Double value;

      final HashMap map = new HashMap();

      for (i = 0; i < m_dValues.length; i++) {

         dValue = m_dValues[i];

         if (dValue != NO_DATA) {

            value = new Double(dValue);

            if (!map.containsKey(value)) {

               map.put(value, "");

            }

         }

      }

      return map.size();

   }

   protected double getDiversity() {

      int i;

      int iCount = 0;

      int iCells = 0;

      double dProp;

      double dValue;

      double dReturn = 0;

      Integer count;

      Double value;

      final HashMap map = new HashMap();

      for (i = 0; i < m_dValues.length; i++) {

         dValue = m_dValues[i];

         if (dValue != NO_DATA) {

            iCells++;

            value = new Double(dValue);

            count = (Integer) map.get(value);

            if (count != null) {

               count = new Integer(count.intValue() + 1);

            }

            else {

               count = new Integer(1);

            }

            map.put(value, count);

         }

      }

      if (iCells != 0) {

         final Set set = map.keySet();

         final Iterator iter = set.iterator();

         while (iter.hasNext()) {

            value = (Double) iter.next();

            dValue = value.doubleValue();

            count = (Integer) map.get(value);

            iCount = count.intValue();

            dProp = (double) iCount / (double) iCells;

            dReturn += (dProp * Math.log(dProp));

         }

         return dReturn;

      }

      else {

         return NO_DATA;

      }

   }

}