org.javarosa.core.util

Class Map<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.javarosa.core.util.OrderedMap<K,V>

org.javarosa.core.util.Map<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class Map<K,V>
extends OrderedMap<K,V>

A Map is a data object that maintains a map from one set of data objects to another. This data object is superior to a Hashtable in instances where O(1) lookups are not a priority, due to its smaller memory footprint. Lookups in a map are accomplished in O(n) time. TODO: Figure out if this actually works anymore! (Is actually smaller in memory than a hashtable)

Author:

Clayton Sims

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor and Description
Map()
Map(int sizeHint)
Map(K[] keysSealed, V[] elementsSealed)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	contains(Object value)
boolean	containsKey(Object key) Whether or not the key is bound in this map
V	elementAt(int index)
Enumeration	elements()
V	get(Object key)
int	indexOfKey(K key)
boolean	isEmpty()
Object	keyAt(int index)
Enumeration	keys()
V	put(K key, V value) Places the key/value pair in this map.
V	remove(Object key) Removes any mapping from the given key
void	removeAt(int i)
void	reset() Removes all keys and values from this map.
void	seal()
int	size()
String	toString()

Methods inherited from class java.util.LinkedHashMap

containsValue, entrySet, forEach, getOrDefault, keySet, removeEldestEntry, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, merge, putAll, putIfAbsent, remove, replace, replace

Methods inherited from class java.util.AbstractMap

equals, hashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, hashCode, merge, putAll, putIfAbsent, remove, replace, replace

Constructor Detail

Map

public Map()

Map

public Map(int sizeHint)

Map

public Map(K[] keysSealed,
           V[] elementsSealed)

Method Detail

put

public V put(K key,
             V value)

Places the key/value pair in this map. Any existing mapping keyed by the key parameter is removed.

Specified by:

put in interface Map<K,V>

Overrides:

put in class HashMap<K,V>

Parameters:

key -

value -

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class HashMap<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class LinkedHashMap<K,V>

Parameters:

key -

Returns:

The object bound to the given key, if one exists. null otherwise.

remove

public V remove(Object key)

Removes any mapping from the given key

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class HashMap<K,V>

Parameters:

key -

reset

public void reset()

Removes all keys and values from this map.

containsKey

public boolean containsKey(Object key)

Whether or not the key is bound in this map

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey in class HashMap<K,V>

Parameters:

key -

Returns:

True if there is an object bound to the given key in this map. False otherwise.

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class LinkedHashMap<K,V>

elementAt

public V elementAt(int index)

elements

public Enumeration elements()

indexOfKey

public int indexOfKey(K key)

keyAt

public Object keyAt(int index)

keys

public Enumeration keys()

removeAt

public void removeAt(int i)

toString

public String toString()

Overrides:

toString in class OrderedMap<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

Overrides:

isEmpty in class HashMap<K,V>

contains

public boolean contains(Object value)

seal

public void seal()