package logo.lang;

import java.util.StringTokenizer;
import java.util.Vector;

public class LogoSub extends Pair {

   Vector params = null;

   public int paramCount() {
      int result=0;
      if (params!=null) result=params.size();
      return result;
   }

   public String getParam(int i) {
      return (String)params.elementAt(i);
   }

   public LogoSub(String subName, String v) {
      super(subName,"");
      setValue(v); //otherwise, 'Params' doesn't work...
   }

   public String getValue() {
      return (String) super.getObject();
   }

   public void setValue(String v) {
      super.setObject(v);
      if ( v.startsWith("params") ) {
        params=new Vector();
        String p = v.substring(0,v.indexOf("]")+1);
        StringTokenizer st = new StringTokenizer(p,"[] ");
        if ( st.hasMoreTokens() ) st.nextToken(); //discard the 1st token (the keyword 'params')
        while ( st.hasMoreTokens() ) {
          params.addElement(st.nextToken());
        }
      }
   }
}