org.mini2Dx.miniscript.core.util

Class ReadWriteIntMap<T>

java.lang.Object

org.mini2Dx.miniscript.core.util.IntMap<T>

org.mini2Dx.miniscript.core.util.ReadWriteIntMap<T>

All Implemented Interfaces:

java.lang.Iterable<IntMap.Entry<T>>

public class ReadWriteIntMap<T>
extends IntMap<T>

Nested Class Summary

Nested classes/interfaces inherited from class org.mini2Dx.miniscript.core.util.IntMap

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

Field Summary

Fields

Modifier and Type	Field and Description
protected org.mini2Dx.lockprovider.ReadWriteLock	lock

Fields inherited from class org.mini2Dx.miniscript.core.util.IntMap

mask, shift, size

Constructor Summary

Constructors

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

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(int key)
void	ensureCapacity(int additionalCapacity) Increases the size of the backing array to accommodate the specified number of additional items.
IntMap.Entries<T>	entries()
boolean	equals(java.lang.Object obj)
int	findKey(java.lang.Object value, boolean identity, int notFound) Returns the key for the specified value, or notFound if it is not in the map.
T	get(int key)
T	get(int key, T defaultValue)
org.mini2Dx.lockprovider.ReadWriteLock	getLock()
int	hashCode()
boolean	isEmpty() Returns true if the map is empty.
IntMap.Keys	keys()
boolean	notEmpty() Returns true if the map has one or more items.
T	put(int key, T value)
void	putAll(IntMap<? extends T> map)
boolean	putIfAbsent(int key, T value) Puts a key/value if the key is not already present
boolean	putIfPresent(int key, T value) Puts a key/value if the key is already present
T	remove(int key) Returns the value for the removed key, or null if the key is not in the map.
void	shrink(int maximumCapacity) Reduces the size of the backing arrays to be the specified capacity or less.
int	size() Returns the size in a thread-safe manner
java.lang.String	toString()
IntMap.Values<T>	values()

Methods inherited from class org.mini2Dx.miniscript.core.util.IntMap

containsValue, equalsIdentity, iterator, place

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 org.mini2Dx.lockprovider.ReadWriteLock lock

Constructor Detail

ReadWriteIntMap

public ReadWriteIntMap()

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

ReadWriteIntMap

public ReadWriteIntMap(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.

ReadWriteIntMap

public ReadWriteIntMap(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 -

ReadWriteIntMap

public ReadWriteIntMap(IntMap<? 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

size

public int size()

Returns the size in a thread-safe manner

Returns:

0 if empty

put

public T put(int key,
             T value)

Overrides:

put in class IntMap<T>

putIfAbsent

public boolean putIfAbsent(int key,
                           T value)

Puts a key/value if the key is not already present

Parameters:

key - The key to put if absent

value - The value to put if absent

Returns:

True if the value was put

putIfPresent

public boolean putIfPresent(int key,
                            T value)

Puts a key/value if the key is already present

Parameters:

key - The key to put if present

value - The value to put if present

Returns:

True if the value was put

putAll

public void putAll(IntMap<? extends T> map)

Overrides:

putAll in class IntMap<T>

get

public T get(int key,
             T defaultValue)

Overrides:

get in class IntMap<T>

Parameters:

key -

defaultValue - Returned if the key was not associated with a value.

get

public T get(int key)

Overrides:

get in class IntMap<T>

remove

public T remove(int key)

Description copied from class: IntMap

Returns the value for the removed key, or null if the key is not in the map.

Overrides:

remove in class IntMap<T>

notEmpty

public boolean notEmpty()

Returns true if the map has one or more items.

Overrides:

notEmpty in class IntMap<T>

isEmpty

public boolean isEmpty()

Returns true if the map is empty.

Overrides:

isEmpty in class IntMap<T>

shrink

public void shrink(int maximumCapacity)

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 IntMap<T>

Parameters:

maximumCapacity -

clear

public void clear(int maximumCapacity)

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

Overrides:

clear in class IntMap<T>

Parameters:

maximumCapacity -

clear

public void clear()

Overrides:

clear in class IntMap<T>

containsKey

public boolean containsKey(int key)

Overrides:

containsKey in class IntMap<T>

findKey

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

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 IntMap<T>

Parameters:

value -

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

notFound -

ensureCapacity

public void ensureCapacity(int additionalCapacity)

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 IntMap<T>

Parameters:

additionalCapacity -

hashCode

public int hashCode()

Overrides:

hashCode in class IntMap<T>

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class IntMap<T>

toString

public java.lang.String toString()

Overrides:

toString in class IntMap<T>

entries

public IntMap.Entries<T> entries()

Overrides:

entries in class IntMap<T>

values

public IntMap.Values<T> values()

Overrides:

values in class IntMap<T>

keys

public IntMap.Keys keys()

Overrides:

keys in class IntMap<T>

getLock

public org.mini2Dx.lockprovider.ReadWriteLock getLock()