uk.ac.ebi.intact.application.goDensity.business.data
Class TwoMaps

java.lang.Object
  |
  +--uk.ac.ebi.intact.application.goDensity.business.data.TwoMaps

public class TwoMaps

extends java.lang.Object

TwoMaps.java represent a data structure, which allow to map unique keys to one Object (like a Hashtable) AND in addition it allows to get back all key Objects for a certain value.

 Example:                     

 put(a, 1)                    

 put(b, 2)                    

 put(b, 4)                    

 put(c, 2)                    

 getObjectByKey(b)   -> 4     

 getObjectByValue(2) -> b, c  

 

Version:

$Id: TwoMaps.java,v 1.2 2003/09/03 12:38:46 markusbrosch Exp $

Author:

Markus Brosch (markus @ brosch.cc)

Constructor Summary

TwoMaps()
standard void constructor

Method Summary

boolean	contains(java.lang.Object key) test, if key is already added
java.lang.Object	getObjectByKey(java.lang.Object key)
java.util.ArrayList	getObjectByValue(java.lang.Object value)
void	put(java.lang.Object key, java.lang.Object value) adds an Object by a certain value Object.
int	size()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TwoMaps

public TwoMaps()

standard void constructor

Method Detail

put

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

adds an Object by a certain value Object. If value Object already exists for the key, it will be overwritten. If no value an no key exists yet, it will be added anyway.

Parameters:

key -

value -

getObjectByKey

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

Parameters:

key - for which the value Object want to be retrieved

Returns:

Object for key; if key-value relation doesn't exist, null is returned

getObjectByValue

public java.util.ArrayList getObjectByValue(java.lang.Object value)

Parameters:

value - for which all mapped keys want to be retrieved

Returns:

key Objects as an ArrayList (Set not possible!)
null, if value not available

contains

public boolean contains(java.lang.Object key)

test, if key is already added

Parameters:

key -

Returns:

true, if key is already added

size

public int size()

Returns:

how many keys-value pairs are added

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()