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package ilog.language.design.base;

/**
 * @version     Last modified on Sun Nov 03 20:42:57 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 java.util.Iterator;

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

public class ApplyInPlaceObjectCollectionHomomorphism extends Instruction
{
  public  ApplyInPlaceObjectCollectionHomomorphism ()
    {
      setName("APPLY_IP_COLL_HOM_O");
    }

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

      r.saveState();

      Instruction[] code = { new PushValueObject() // collection element
                           , new EnterBlock(function)
                           , Instruction.STOP
                           };

      r.setCode(code);

      Iterator i = collection.iterator(true);
      while (i.hasNext())
        {
          ((PushValueObject)code[0]).setValue(i.next());
          r.resetIP();
          r.run();
        }

      r.restoreState();
    }
}