serp.util
Class MapSet

java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractSet
              |
              +--serp.util.MapSet

All Implemented Interfaces:

Collection, Set

public class MapSet

extends AbstractSet

Set implementation that uses any given map for internal storage. The set will take on all the properties of the given map. For example, if given an IdentityMap, the set will allow two elements that are the same according to their Object.equals(java.lang.Object) method but have different JVM identities. Or if a LinkedHashMap is used, elements will be kept in insertion order. The map used must be able to take null values.

Field Summary

(package private) Map

_map

Constructor Summary

MapSet()
Equivalent to MapSet (new HashMap ()).

MapSet(Map map)
Construct a MapSet with the given interal map.

Method Summary

boolean	add(Object obj)
boolean	contains(Object obj)
(package private) boolean	isIdentity()
Iterator	iterator()
boolean	remove(Object obj)
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, clear, containsAll, isEmpty, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, clear, containsAll, isEmpty, retainAll, toArray, toArray

Field Detail

_map

Map _map

Constructor Detail

MapSet

public MapSet()

Equivalent to MapSet (new HashMap ()).

See Also:

MapSet(Map)

MapSet

public MapSet(Map map)

Construct a MapSet with the given interal map. The internal map will be cleared. It should not be accessed in any way after being given to this constructor; this set will 'inherit' its behavior, however. For example, if the given map is a LinkedHashMap, the iterator() of this set will return values in insertion order.

Method Detail

size

public int size()

Overrides:

size in class AbstractCollection

add

public boolean add(Object obj)

Overrides:

add in class AbstractCollection

remove

public boolean remove(Object obj)

Overrides:

remove in class AbstractCollection

contains

public boolean contains(Object obj)

Overrides:

contains in class AbstractCollection

iterator

public Iterator iterator()

Overrides:

iterator in class AbstractCollection

isIdentity

boolean isIdentity()