import java.util.*;
 
/**
 * Created by IntelliJ IDEA.
 * User: me
 * Date: 11.09.2006
 * Time: 15:21:14
 * To change this template use File | Settings | File Templates.
 */
public class ShortStrings implements Iterator {
    private Iterator strings;
    private String nextShort;
    private final int maxLen;
 
    public ShortStrings(Iterator strings, int maxLen) {
        this.strings = strings;
        this.nextShort = null;
        this.maxLen = maxLen;
    }
 
    public boolean hasNext() {
        if (nextShort != null)
            return true;
 
        while (strings.hasNext()) {
            nextShort = (String) strings.next();
            if (nextShort.length() <= maxLen)
                return true;
        }
        nextShort = null;
        return false;
    }
 
    public Object next() {
        if (nextShort == null && !hasNext())
            throw new NoSuchElementException();
 
        String n  = nextShort;
        nextShort = null;
        return n;
    }
 
    public void remove() {
        throw new UnsupportedOperationException();
    }
}