package jdsl;

import jdsl.InvalidKeyException;


public interface Comparator {
    
    public boolean lessThan(Object key_one, Object key_two) 
	throws InvalidKeyException;

    public boolean lessThanOrEqualTo(Object key_one, Object key_two)
	throws InvalidKeyException;

    public boolean equalTo(Object key_one, Object key_two)
	throws InvalidKeyException;

    public boolean greaterThan(Object key_one, Object key_two)
	throws InvalidKeyException;

    public boolean greaterThanOrEqualTo(Object key_one, Object key_two)
	throws InvalidKeyException;

    public int compareTo(Object key_one, Object key_two)
	throws InvalidKeyException;

}