Class SimpleIndexHashMapWrapper<K,V>

java.lang.Object

org.mvel2.util.SimpleIndexHashMapWrapper<K,V>

All Implemented Interfaces:

Map<K,V>

public class SimpleIndexHashMapWrapper<K,V>
extends Object
implements Map<K,V>

As most use-cases of the VariableResolverFactory's rely on Maps, this is meant to implement a simple wrapper which records index positions for use by the optimizing facilities. This wrapper also ensures that the Map is only additive. You cannot remove an element once it's been added. While this may seem like an odd limitation, it is consistent with the language semantics. (ie. it's not possible to delete a variable at runtime once it's been declared).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	SimpleIndexHashMapWrapper.ValueContainer<K,V>

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
private final ArrayList<SimpleIndexHashMapWrapper<K,V>.ValueContainer<K,V>>	indexBasedLookup
private int	indexCounter
private final Map<K, SimpleIndexHashMapWrapper<K,V>.ValueContainer<K,V>>	wrappedMap

Constructor Summary

Constructors

Constructor	Description
SimpleIndexHashMapWrapper()
SimpleIndexHashMapWrapper(K[] keys)
SimpleIndexHashMapWrapper(K[] keys, int initialCapacity, float load)
SimpleIndexHashMapWrapper(SimpleIndexHashMapWrapper<K,V> wrapper, boolean allocateOnly)

Method Summary

Modifier and Type	Method	Description
void	addKey(K key)
void	addKey(K key, V value)
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	getByIndex(int index)
K	getKeyAtIndex(int index)
int	indexOf(K key)
void	initWithKeys(K[] keys)
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K, ? extends V> m)
void	putAtIndex(int index, V value)
V	remove(Object key)
int	size()
Collection<V>	values()

Methods inherited from class Object

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

Methods inherited from interface Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Details

indexCounter

private int indexCounter

wrappedMap

private final Map<K, SimpleIndexHashMapWrapper<K,V>.ValueContainer<K,V>> wrappedMap

indexBasedLookup

private final ArrayList<SimpleIndexHashMapWrapper<K,V>.ValueContainer<K,V>> indexBasedLookup

Constructor Details

SimpleIndexHashMapWrapper

public SimpleIndexHashMapWrapper()

SimpleIndexHashMapWrapper

public SimpleIndexHashMapWrapper(SimpleIndexHashMapWrapper<K,V> wrapper,
 boolean allocateOnly)

SimpleIndexHashMapWrapper

public SimpleIndexHashMapWrapper(K[] keys)

SimpleIndexHashMapWrapper

public SimpleIndexHashMapWrapper(K[] keys,
 int initialCapacity,
 float load)

Method Details

initWithKeys

public void initWithKeys(K[] keys)

addKey

public void addKey(K key)

addKey

public void addKey(K key,
 V value)

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

getByIndex

public V getByIndex(int index)

getKeyAtIndex

public K getKeyAtIndex(int index)

indexOf

public int indexOf(K key)

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

putAtIndex

public void putAtIndex(int index,
 V value)

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

putAll

public void putAll(Map<? extends K, ? extends V> m)

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>