com.carrotsearch.hppc

Interface ObjectIntMap<KType>

All Superinterfaces:

java.lang.Iterable<ObjectIntCursor<KType>>, ObjectIntAssociativeContainer<KType>

All Known Implementing Classes:

ObjectIntHashMap, ObjectIntIdentityHashMap, ObjectIntScatterMap

@Generated(date="2017-10-22T12:19:55+0200",
           value="KTypeVTypeMap.java")
public interface ObjectIntMap<KType>
extends ObjectIntAssociativeContainer<KType>

An associative container with unique binding from keys to a single value.

Method Summary

Methods

Modifier and Type	Method and Description
int	addTo(KType key, int additionValue) An equivalent of calling
void	clear() Clear all keys and values in the container.
boolean	equals(java.lang.Object obj) Compares the specified object with this set for equality.
int	get(KType key)
int	getOrDefault(KType key, int defaultValue)
int	hashCode()
boolean	indexExists(int index)
int	indexGet(int index) Returns the value associated with an existing key.
void	indexInsert(int index, KType key, int value) Inserts a key-value pair for a key that is not present in the map.
int	indexOf(KType key) Returns a logical "index" of a given key that can be used to speed up follow-up value setters or getters in certain scenarios (conditional logic).
int	indexReplace(int index, int newValue) Replaces the value associated with an existing key and returns any previous value stored for that key.
int	put(KType key, int value) Place a given key and value in the container.
int	putAll(java.lang.Iterable<? extends ObjectIntCursor<? extends KType>> iterable) Puts all keys from an iterable cursor to this map, replacing the values of existing keys, if such keys are present.
int	putAll(ObjectIntAssociativeContainer<? extends KType> container) Puts all keys from another container to this map, replacing the values of existing keys, if such keys are present.
int	putOrAdd(KType key, int putValue, int incrementValue) If key exists, putValue is inserted into the map, otherwise any existing value is incremented by additionValue.
void	release() Removes all elements from the collection and additionally releases any internal buffers.
int	remove(KType key) Remove all values at the given key.
java.lang.String	visualizeKeyDistribution(int characters) Visually depict the distribution of keys.

Methods inherited from interface com.carrotsearch.hppc.ObjectIntAssociativeContainer

containsKey, forEach, forEach, isEmpty, iterator, keys, removeAll, removeAll, removeAll, size, values

Method Detail

get

int get(KType key)

Returns:

Returns the value associated with the given key or the default value for the key type, if the key is not associated with any value. Important note: For primitive type values, the value returned for a non-existing key may not be the default value of the primitive type (it may be any value previously assigned to that slot).

getOrDefault

int getOrDefault(KType key,
               int defaultValue)

Returns:

Returns the value associated with the given key or the provided default value if the key is not associated with any value.

put

int put(KType key,
      int value)

Place a given key and value in the container.

Returns:

The value previously stored under the given key in the map is returned.

putAll

int putAll(ObjectIntAssociativeContainer<? extends KType> container)

Puts all keys from another container to this map, replacing the values of existing keys, if such keys are present.

Returns:

Returns the number of keys added to the map as a result of this call (not previously present in the map). Values of existing keys are overwritten.

putAll

int putAll(java.lang.Iterable<? extends ObjectIntCursor<? extends KType>> iterable)

Puts all keys from an iterable cursor to this map, replacing the values of existing keys, if such keys are present.

Returns:

Returns the number of keys added to the map as a result of this call (not previously present in the map). Values of existing keys are overwritten.

putOrAdd

int putOrAdd(KType key,
           int putValue,
           int incrementValue)

If key exists, putValue is inserted into the map, otherwise any existing value is incremented by additionValue.

Parameters:

key - The key of the value to adjust.

putValue - The value to put if key does not exist.

incrementValue - The value to add to the existing value if key exists.

Returns:

Returns the current value associated with key (after changes).

addTo

int addTo(KType key,
        int additionValue)

An equivalent of calling

 putOrAdd(key, additionValue, additionValue);
 

Parameters:

key - The key of the value to adjust.

additionValue - The value to put or add to the existing value if key exists.

Returns:

Returns the current value associated with key (after changes).

remove

int remove(KType key)

Remove all values at the given key. The default value for the key type is returned if the value does not exist in the map.

equals

boolean equals(java.lang.Object obj)

Compares the specified object with this set for equality. Returns true if and only if the specified object is also a ObjectIntMap and both objects contains exactly the same key-value pairs.

Overrides:

equals in class java.lang.Object

hashCode

int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

A hash code of elements stored in the map. The hash code is defined as a sum of hash codes of keys and values stored within the set). Because sum is commutative, this ensures that different order of elements in a set does not affect the hash code.

indexOf

int indexOf(KType key)

Returns a logical "index" of a given key that can be used to speed up follow-up value setters or getters in certain scenarios (conditional logic). The semantics of "indexes" are not strictly defined. Indexes may (and typically won't be) contiguous. The index is valid only between map modifications (it will not be affected by read-only operations like iteration or value retrievals).

Parameters:

key - The key to locate in the map.

Returns:

A non-negative value of the logical "index" of the key in the map or a negative value if the key did not exist.

See Also:

indexExists(int), indexGet(int), indexInsert(int, KType, int), indexReplace(int, int)

indexExists

boolean indexExists(int index)

Parameters:

index - The index of a given key, as returned from indexOf(KType).

Returns:

Returns true if the index corresponds to an existing key or false otherwise. This is equivalent to checking whether the index is a positive value (existing keys) or a negative value (non-existing keys).

See Also:

indexOf(KType)

indexGet

int indexGet(int index)

Returns the value associated with an existing key.

Parameters:

index - The index of an existing key.

Returns:

Returns the value currently associated with the key.

Throws:

java.lang.AssertionError - If assertions are enabled and the index does not correspond to an existing key.

See Also:

indexOf(KType)

indexReplace

int indexReplace(int index,
               int newValue)

Replaces the value associated with an existing key and returns any previous value stored for that key.

Parameters:

index - The index of an existing key.

Returns:

Returns the previous value associated with the key.

Throws:

java.lang.AssertionError - If assertions are enabled and the index does not correspond to an existing key.

See Also:

indexOf(KType)

indexInsert

void indexInsert(int index,
               KType key,
               int value)

Inserts a key-value pair for a key that is not present in the map. This method may help in avoiding double recalculation of the key's hash.

Parameters:

index - The index of a previously non-existing key, as returned from indexOf(KType).

Throws:

java.lang.AssertionError - If assertions are enabled and the index corresponds to an existing key.

See Also:

indexOf(KType)

clear

void clear()

Clear all keys and values in the container.

See Also:

release()

release

void release()

Removes all elements from the collection and additionally releases any internal buffers. Typically, if the object is to be reused, a simple clear() should be a better alternative since it'll avoid reallocation.

See Also:

clear()

visualizeKeyDistribution

java.lang.String visualizeKeyDistribution(int characters)

Visually depict the distribution of keys.

Parameters:

characters - The number of characters to "squeeze" the entire buffer into.

Returns:

Returns a sequence of characters where '.' depicts an empty fragment of the internal buffer and 'X' depicts full or nearly full capacity within the buffer's range and anything between 1 and 9 is between.