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package ilog.language.design.base;

/**
 * @version     Last modified on Sun Dec 15 14:01:02 2002 by hak
 * @author      <a href="mailto:hak@ilog.fr">Hassan A&iuml;t-Kaci</a>
 * @copyright   &copy; 2002 <a href="http://www.ilog.fr/">ILOG, S.A.</a>
 */

import ilog.language.util.DoubleIterator;

import ilog.language.design.backend.Runtime;
import ilog.language.design.backend.Iteratable;
import ilog.language.design.backend.Block;

public class ApplyInPlaceRealFilterHomomorphism extends Instruction
{
  public  ApplyInPlaceRealFilterHomomorphism ()
    {
      setName("APPLY_IP_FHOM_R");
    }

  public final void execute (Runtime r) throws Exception
    {
      Iteratable collection = (Iteratable)r.popObject();
      Block filter   = (Block)r.popObject();
      Block function = (Block)r.popObject();

      r.saveState();

      r.pushRealEnv(0.0);
      DoubleIterator i = collection.realIterator(true);
      while (i.hasNext())
        {
          r.setRealValue(i.next());
          r.runBody(filter);
          if (r.popBoolean())
            r.runBody(function);              
        }

      r.restoreState();
    }
}