org.mini2Dx.core.collections.concurrent

Class ConcurrentByteMap<T>

java.lang.Object

org.mini2Dx.core.collections.ByteMap<T>

org.mini2Dx.core.collections.concurrent.ConcurrentByteMap<T>

All Implemented Interfaces:

java.lang.Iterable<ByteMap.Entry<T>>, ConcurrentCollection

public class ConcurrentByteMap<T>
extends ByteMap<T>
implements ConcurrentCollection

Nested Class Summary

Nested classes/interfaces inherited from class org.mini2Dx.core.collections.ByteMap

ByteMap.Entries<V>, ByteMap.Entry<V>, ByteMap.Keys, ByteMap.Values<V>

Field Summary

Fields

Modifier and Type	Field and Description
protected ReadWriteLock	lock

Fields inherited from class org.mini2Dx.core.collections.ByteMap

size

Constructor Summary

Constructors

Constructor and Description
ConcurrentByteMap() Creates a new map with an initial capacity of 51 and a load factor of 0.8.
ConcurrentByteMap(ByteMap<? extends T> map) Creates a new map identical to the specified map.
ConcurrentByteMap(int initialCapacity) Creates a new map with a load factor of 0.8.
ConcurrentByteMap(int initialCapacity, float loadFactor) Creates a new map with the specified initial capacity and load factor.

Method Summary

Modifier and Type	Method and Description
void	clear()
void	clear(int maximumCapacity) Clears the map and reduces the size of the backing arrays to be the specified capacity if they are larger.
boolean	containsKey(byte key)
boolean	containsValue(java.lang.Object value, boolean identity) Returns true if the specified value is in the map.
void	ensureCapacity(int additionalCapacity) Increases the size of the backing array to accommodate the specified number of additional items.
ByteMap.Entries<T>	entries() Returns an iterator for the entries in the map.
boolean	equals(java.lang.Object object)
byte	findKey(java.lang.Object value, boolean identity, byte notFound) Returns the key for the specified value, or notFound if it is not in the map.
T	get(byte key, T defaultValue)
ReadWriteLock	getLock() Returns the collection's ReadWriteLock
int	hashCode()
ByteMap.Keys	keys() Returns an iterator for the keys in the map.
T	put(byte key, T value)
void	putAll(ByteMap<T> map)
T	remove(byte key)
void	shrink(int maximumCapacity) Reduces the size of the backing arrays to be the specified capacity or less.
java.lang.String	toString()
ByteMap.Values<T>	values() Returns an iterator for the values in the map.

Methods inherited from class org.mini2Dx.core.collections.ByteMap

get, iterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

lock

protected ReadWriteLock lock

Constructor Detail

ConcurrentByteMap

public ConcurrentByteMap()

Creates a new map with an initial capacity of 51 and a load factor of 0.8.

ConcurrentByteMap

public ConcurrentByteMap(int initialCapacity)

Creates a new map with a load factor of 0.8.

Parameters:

initialCapacity - If not a power of two, it is increased to the next nearest power of two.

ConcurrentByteMap

public ConcurrentByteMap(int initialCapacity,
                         float loadFactor)

Creates a new map with the specified initial capacity and load factor. This map will hold initialCapacity items before growing the backing table.

Parameters:

initialCapacity - If not a power of two, it is increased to the next nearest power of two.

loadFactor -

ConcurrentByteMap

public ConcurrentByteMap(ByteMap<? extends T> map)

Creates a new map identical to the specified map. NOTE: read access to the other map is not thread-safe

Parameters:

map -

Method Detail

put

public T put(byte key,
             T value)

Overrides:

put in class ByteMap<T>

putAll

public void putAll(ByteMap<T> map)

Overrides:

putAll in class ByteMap<T>

get

public T get(byte key,
             T defaultValue)

Overrides:

get in class ByteMap<T>

remove

public T remove(byte key)

Overrides:

remove in class ByteMap<T>

shrink

public void shrink(int maximumCapacity)

Description copied from class: ByteMap

Reduces the size of the backing arrays to be the specified capacity or less. If the capacity is already less, nothing is done. If the map contains more items than the specified capacity, the next highest power of two capacity is used instead.

Overrides:

shrink in class ByteMap<T>

clear

public void clear(int maximumCapacity)

Description copied from class: ByteMap

Clears the map and reduces the size of the backing arrays to be the specified capacity if they are larger.

Overrides:

clear in class ByteMap<T>

clear

public void clear()

Overrides:

clear in class ByteMap<T>

containsValue

public boolean containsValue(java.lang.Object value,
                             boolean identity)

Description copied from class: ByteMap

Returns true if the specified value is in the map. Note this traverses the entire map and compares every value, which may be an expensive operation.

Overrides:

containsValue in class ByteMap<T>

containsKey

public boolean containsKey(byte key)

Overrides:

containsKey in class ByteMap<T>

findKey

public byte findKey(java.lang.Object value,
                    boolean identity,
                    byte notFound)

Description copied from class: ByteMap

Returns the key for the specified value, or notFound if it is not in the map. Note this traverses the entire map and compares every value, which may be an expensive operation.

Overrides:

findKey in class ByteMap<T>

identity - If true, uses == to compare the specified value with values in the map. If false, uses ByteMap.equals(Object).

ensureCapacity

public void ensureCapacity(int additionalCapacity)

Description copied from class: ByteMap

Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many items to avoid multiple backing array resizes.

Overrides:

ensureCapacity in class ByteMap<T>

hashCode

public int hashCode()

Overrides:

hashCode in class ByteMap<T>

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class ByteMap<T>

toString

public java.lang.String toString()

Overrides:

toString in class ByteMap<T>

entries

public ByteMap.Entries<T> entries()

Description copied from class: ByteMap

Returns an iterator for the entries in the map. Remove is supported. Note that the same iterator instance is returned each time this method is called. Use the ByteMap.Entries constructor for nested or multithreaded iteration.

Overrides:

entries in class ByteMap<T>

values

public ByteMap.Values<T> values()

Description copied from class: ByteMap

Returns an iterator for the values in the map. Remove is supported. Note that the same iterator instance is returned each time this method is called. Use the ByteMap.Entries constructor for nested or multithreaded iteration.

Overrides:

values in class ByteMap<T>

keys

public ByteMap.Keys keys()

Description copied from class: ByteMap

Returns an iterator for the keys in the map. Remove is supported. Note that the same iterator instance is returned each time this method is called. Use the ByteMap.Entries constructor for nested or multithreaded iteration.

Overrides:

keys in class ByteMap<T>

getLock

public ReadWriteLock getLock()

Description copied from interface: ConcurrentCollection

Returns the collection's ReadWriteLock

Specified by:

getLock in interface ConcurrentCollection

Returns:

the collection's ReadWriteLock