net.sf.jtemporal.util
Class SingleElementMap

java.lang.Object
  net.sf.jtemporal.util.SingleElementMap

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map

public class SingleElementMap
extends java.lang.Object
implements java.util.Map, java.lang.Cloneable

This is a read-only Map, contining a single entry.
This is intended to be used to replace other implementations of Map when they contain a single entry, to save memory, and improve read performances.
Thread-safe.

Version:

$Id: SingleElementMap.java,v 1.4 2006/12/04 20:04:39 tabeck Exp $

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Constructor Summary

SingleElementMap(java.lang.Object key, java.lang.Object value)
Unique constructor.

Method Summary

void	clear()
java.lang.Object	clone()
boolean	containsKey(java.lang.Object k)
boolean	containsValue(java.lang.Object v)
java.util.Set	entrySet()
boolean	equals(java.lang.Object o)
java.lang.Object	get(java.lang.Object k)
int	hashCode()
boolean	isEmpty()
java.util.Set	keySet()
java.lang.Object	put(java.lang.Object k, java.lang.Object v)
void	putAll(java.util.Map t)
java.lang.Object	remove(java.lang.Object k)
int	size()
java.lang.String	toString()
java.util.Collection	values()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SingleElementMap

public SingleElementMap(java.lang.Object key,
                        java.lang.Object value)

Unique constructor.

Parameters:

key - as defined in Map.Entry

value - as defined in Map.Entry

Method Detail

size

public int size()

Specified by:

size in interface java.util.Map

clear

public void clear()

Specified by:

clear in interface java.util.Map

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map

containsKey

public boolean containsKey(java.lang.Object k)

Specified by:

containsKey in interface java.util.Map

containsValue

public boolean containsValue(java.lang.Object v)

Specified by:

containsValue in interface java.util.Map

values

public java.util.Collection values()

Specified by:

values in interface java.util.Map

putAll

public void putAll(java.util.Map t)

Specified by:

putAll in interface java.util.Map

entrySet

public java.util.Set entrySet()

Specified by:

entrySet in interface java.util.Map

keySet

public java.util.Set keySet()

Specified by:

keySet in interface java.util.Map

get

public java.lang.Object get(java.lang.Object k)

Specified by:

get in interface java.util.Map

remove

public java.lang.Object remove(java.lang.Object k)

Specified by:

remove in interface java.util.Map

put

public java.lang.Object put(java.lang.Object k,
                            java.lang.Object v)

Specified by:

put in interface java.util.Map

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Map

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map

Overrides:

hashCode in class java.lang.Object

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object