/vqdr/trunk

namespace Utils {

  public class RangeIterator {

    private Range range;

    private int current;

    public RangeIterator (Range range) {

      this.range = range;

      this.current = this.range.start;

    }

     public int get () {

       return this.current;

     }

    public bool next () {

      if (!this.range.reverse) {

        if (this.current <= this.range.end) {

          this.current++;

          return true;

        }

      } else {

        if (this.current >= this.range.end){

          this.current--;

        }

      }

      return false;

    }

    public bool has_next () {

      return (this.current < this.range.end);

    }

  }

  public class Range {

    public bool reverse {get; private set;}

    public int start {get; private set;}

    public int end {get; private set;}

    public Range (int start, int end) {

      if (start <= end) {

        this.reverse = false;

      } else {

        this.reverse = true;

      }

      this.start = start;

      this.end = end;

    }

    public Type element_type () {

      return typeof (int);

    }

    public RangeIterator iterator () {

      return new RangeIterator (this);

    }

  }

}