package is2.data;



/**
 * @author Bernd Bohnet, 01.09.2009
 * 
 * Maps for the Hash Kernel the long values to the int values.
 */
final public class Long2IntExact implements Long2IntInterface {

	static gnu.trove.TLongIntHashMap mapt = new gnu.trove.TLongIntHashMap();
	
	static int cnt=0;

	
	
	public Long2IntExact() {
		size=115911564;
	} 
	
	
	public Long2IntExact(int s) {
		size=s;
	}
	
	
	/** Integer counter for long2int */
	final private int size; //0x03ffffff //0x07ffffff
	                       
				
	/* (non-Javadoc)
	 * @see is2.sp09k9992.Long2IntIterface#size()
	 */
	public  int size() {return size;}
		
	/* (non-Javadoc)
	 * @see is2.sp09k9992.Long2IntIterface#start()
	 * has no meaning for this implementation
	 */
	final public void start() {}
		

	/* (non-Javadoc)
	 * @see is2.sp09k9992.Long2IntIterface#l2i(long)
	 */
	final public int l2i(long l) {		
		if (l<0) return -1;
		
		int i = mapt.get(l);
		if (i!=0) return i;
		
		if (i==0 && cnt<size-1) {
			cnt++;
			mapt.put(l, cnt);
			return cnt;
		}
		return -1;
	}
}