org.springframework.osgi.util
Class MapBasedDictionary

java.lang.Object
  java.util.Dictionary
      org.springframework.osgi.util.MapBasedDictionary

All Implemented Interfaces:

Map

public class MapBasedDictionary
extends Dictionary
implements Map

Dictionary implementation backed by a map instance. While the JDK provides a Dictionary implementation through Hashtable, the class itself is always synchronized and does not maintain the internal order.

This simple wrapper, accepts any type of Map as backing storage allowing more options in chosing the approapriate implementation. By default, a LinkedHashMap is used, if no Map is specified.

This implementation will enforce the Dictionary behavior over the map when it comes to handling null values. As opposed to a Map, the Dictionary always throws NullPointerException if a given argument is null.

Author:

Costin Leau

See Also:

Map, Dictionary

Nested Class Summary

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

Map.Entry<K,V>

Constructor Summary

MapBasedDictionary()
Default constructor.

MapBasedDictionary(Dictionary dictionary)
Constructor for dealing with existing Dictionary.

MapBasedDictionary(int initialCapacity)

MapBasedDictionary(Map map)

MapBasedDictionary(Map map, Dictionary dictionary)

Method Summary

void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Enumeration	elements()
Set	entrySet()
boolean	equals(Object obj)
Object	get(Object key)
int	hashCode()
boolean	isEmpty()
Enumeration	keys()
Set	keySet()
Object	put(Object key, Object value)
void	putAll(Dictionary dictionary)
void	putAll(Map t)
Object	remove(Object key)
int	size()
String	toString()
Collection	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

MapBasedDictionary

public MapBasedDictionary(Map map)

MapBasedDictionary

public MapBasedDictionary()

Default constructor.

MapBasedDictionary

public MapBasedDictionary(int initialCapacity)

MapBasedDictionary

public MapBasedDictionary(Dictionary dictionary)

Constructor for dealing with existing Dictionary. Will copy the content into the inner Map.

Parameters:

dictionary -

MapBasedDictionary

public MapBasedDictionary(Map map,
                          Dictionary dictionary)

Method Detail

clear

public void clear()

Specified by:

clear in interface Map

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map

entrySet

public Set entrySet()

Specified by:

entrySet in interface Map

get

public Object get(Object key)

Specified by:

get in interface Map

Specified by:

get in class Dictionary

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map

Specified by:

isEmpty in class Dictionary

keySet

public Set keySet()

Specified by:

keySet in interface Map

put

public Object put(Object key,
                  Object value)

Specified by:

put in interface Map

Specified by:

put in class Dictionary

putAll

public void putAll(Map t)

Specified by:

putAll in interface Map

putAll

public void putAll(Dictionary dictionary)

remove

public Object remove(Object key)

Specified by:

remove in interface Map

Specified by:

remove in class Dictionary

size

public int size()

Specified by:

size in interface Map

Specified by:

size in class Dictionary

values

public Collection values()

Specified by:

values in interface Map

elements

public Enumeration elements()

Specified by:

elements in class Dictionary

keys

public Enumeration keys()

Specified by:

keys in class Dictionary

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Map

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map

Overrides:

hashCode in class Object