org.apache.ojb.broker.util
Class DoubleHashtable

java.lang.Object
  org.apache.ojb.broker.util.DoubleHashtable

public class DoubleHashtable

extends java.lang.Object

this class can be used to build two-way lookup tables. It provides lookup from keys to values and the inverse lookup from values to keys.

Version:

$Id: DoubleHashtable.java 365232 2005-12-21 22:36:07Z tomdz $

Author:

Thomas Mahler

Constructor Summary

DoubleHashtable()
public default constructor.

Method Summary

java.lang.Object	getKeyByValue(java.lang.Object value) lookup a key from the table by its value.
java.lang.Object	getValueByKey(java.lang.Object key) lookup a value from the table by its key.
void	put(java.lang.Object key, java.lang.Object value) put a (key, value) pair into the table.
void	removeByKey(java.lang.Object key) remove a (key, value)-entry by its key
void	removeByValue(java.lang.Object value) remove a (key, value)-entry by its value

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DoubleHashtable

public DoubleHashtable()

public default constructor.

Method Detail

put

public void put(java.lang.Object key,
                java.lang.Object value)

put a (key, value) pair into the table.

Parameters:

key - the key object.

value - the value object.

getValueByKey

public java.lang.Object getValueByKey(java.lang.Object key)

lookup a value from the table by its key.

Parameters:

key - the key object

Returns:

the associated value object

getKeyByValue

public java.lang.Object getKeyByValue(java.lang.Object value)

lookup a key from the table by its value.

Parameters:

value - the value object

Returns:

the associated key object

removeByKey

public void removeByKey(java.lang.Object key)

remove a (key, value)-entry by its key

Parameters:

key - the key object

removeByValue

public void removeByValue(java.lang.Object value)

remove a (key, value)-entry by its value

Parameters:

value - the value object