com.saxonica.functions.map
Class ImmutableMap<K,V>

java.lang.Object
  com.saxonica.functions.map.ImmutableMap<K,V>

public class ImmutableMap<K,V>
extends Object

An immutable map. The put() operation which adds or clears an entry has the effect of creating a new map that is conceptually a modified copy of the old map; in fact the implementation is designed to share storage as far as possible.

Field Summary

static String	NAMESPACE
static SequenceType	TYPE

Constructor Summary

ImmutableMap()
Create an empty map

ImmutableMap(LinkedList<HashMap<K,V>> existing)
Create a new map based on supplied contents

Method Summary

V	get(K key) Get an entry from the Map
Set<K>	keySet() Get the set of all key values in the map.
ImmutableMap<K,V>	put(K key, V value) Add an entry to the Map

Methods inherited from class java.lang.Object

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

Field Detail

NAMESPACE

public static final String NAMESPACE

See Also:

Constant Field Values

TYPE

public static final SequenceType TYPE

Constructor Detail

ImmutableMap

public ImmutableMap()

Create an empty map

ImmutableMap

public ImmutableMap(LinkedList<HashMap<K,V>> existing)

Create a new map based on supplied contents

Method Detail

put

public ImmutableMap<K,V> put(K key,
                             V value)

Add an entry to the Map

get

public V get(K key)

Get an entry from the Map

keySet

public Set<K> keySet()

Get the set of all key values in the map. This will be a newly constructed set. The objects in the set are XPathComparable values representing the normalized values of the keys