package dict;

import java.lang.*;

/**
 * Implements a key/value pair for use by a Dictionary.
 */
public class DictionaryPair implements Comparable {
    private Comparable _key;
    private Object     _value;

    /**
     * Initialize a key/value pair.
     */
    public DictionaryPair(Comparable key, Object value) {
	_key   = key;
	_value = value;
    }

    /**
     * Delegate compareTo() to the key.
     */
    public int compareTo(Object other) {
	return _key.compareTo(((DictionaryPair)other)._key);
    }

    /**
     * Returns the key.
     */
    public Comparable getKey() {
	return _key;
    }

    /**
     * Returns the value.
     */
    public Object getValue() {
	return _value;
    }

    /**
     * Converts the key/value pair into a string
     * of the form "(key,value)".
     */
    public String toString() {
	return "(" + _key + "," + _value + ")";
    }
}