一个java的LDAP服务器

				package org.javaldap.btree;
				
				/*
				  File: Comparator.java
				 
				  Biel School of Engineering, Computer Science Division. 
				  Course "Algorithms with Objects in Java" 
				  Originally written by Roger Cattin (c) 1997/98
				 
				  History:
				  Date     Who                 What
				  Nov97    ctr@info.isbiel.ch  Created.
				*/
				
				/**
				 * Comparator is an interface for any class possessing an ordering
				 * comparison method.
				**/
				
				public interface Comparator {
					/**
					 * Compare two Objects with respect to ordering. Typical
					 * implementations first cast their arguments to particular
					 * types in order to perform comparison.
					 * @param obj object to be compared with this
					 * @return a negative number if this is less than obj; a
					 * positive number if this is greater than obj; else 0
					**/
					public int compareTo(Object obj);
				}