net.openhft.koloboke.collect.map

Interface LongObjMap<V>

All Superinterfaces:

Container, Map<Long,V>

All Known Subinterfaces:

HashLongObjMap<V>

public interface LongObjMap<V>
extends Map<Long,V>, Container

A Map specialization with long keys and Object values.

See Also:

LongObjMapFactory

Nested Class Summary

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Method Summary

Methods

Modifier and Type	Method and Description
V	compute(long key, LongObjFunction<? super V,? extends V> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
V	computeIfAbsent(long key, LongFunction<? extends V> mappingFunction) If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
V	computeIfPresent(long key, LongObjFunction<? super V,? extends V> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
boolean	containsKey(long key) Returns true if this map contains a mapping for the specified key.
boolean	containsKey(Object key) Deprecated. Use specialization containsKey(long) instead
LongObjCursor<V>	cursor() Returns a new cursor over the entries of this map.
ObjSet<Map.Entry<Long,V>>	entrySet() Returns a Set view of the mappings contained in this map.
void	forEach(LongObjConsumer<? super V> action) Performs the given action on each entry in this map until all entries have been processed or the action throws an Exception.
boolean	forEachWhile(LongObjPredicate<? super V> predicate) Checks the given predicate on each entry in this map until all entries have been processed or the predicate returns false for some entry, or throws an Exception.
V	get(long key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
V	get(Object key) Deprecated. Use specialization get(long) instead
V	getOrDefault(long key, V defaultValue) Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
V	getOrDefault(Object key, V defaultValue) Deprecated. Use specialization getOrDefault(long, Object) instead
LongSet	keySet() Returns a Set view of the keys contained in this map.
V	merge(long key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction) If the specified key is not already associated with a value (or is mapped to null), associates it with the given value, otherwise, replaces the value with the results of the given remapping function.
V	put(long key, V value) Associates the specified value with the specified key in this map (optional operation).
V	put(Long key, V value) Deprecated. Use specialization put(long, Object) instead
V	putIfAbsent(long key, V value) If the specified key is not already associated with a value (or is mapped to null), associates it with the given value and returns null, else returns the current value.
V	putIfAbsent(Long key, V value) Deprecated. Use specialization putIfAbsent(long, Object) instead
V	remove(long key) Removes the mapping for a key from this map if it is present (optional operation).
boolean	remove(long key, Object value) Removes the entry for the specified key only if it is currently mapped to the specified value.
V	remove(Object key) Deprecated. Use specialization remove(long) instead
boolean	remove(Object key, Object value) Deprecated. Use specialization remove(long, Object) instead
boolean	removeIf(LongObjPredicate<? super V> filter) Removes all of the entries of this collection that satisfy the given predicate.
V	replace(long key, V value) Replaces the entry for the specified key only if it is currently mapped to some value.
V	replace(Long key, V value) Deprecated. Use specialization replace(long, Object) instead
boolean	replace(long key, V oldValue, V newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
boolean	replace(Long key, V oldValue, V newValue) Deprecated. Use specialization replace(long, Object, Object) instead
void	replaceAll(LongObjFunction<? super V,? extends V> function) Replaces each entry's value with the result of invoking the given function on that entry, in the order entries are returned by an entry set iterator, until all entries have been processed or the function throws an exception.
Equivalence<V>	valueEquivalence() Returns the equivalence strategy for values in this map.
ObjCollection<V>	values() Returns a Collection view of the values contained in this map.

Methods inherited from interface Map

clear, containsValue, equals, hashCode, isEmpty, putAll, size

Methods inherited from interface net.openhft.koloboke.collect.Container

clear, ensureCapacity, isEmpty, shrink, size, sizeAsLong

Method Detail

valueEquivalence

@Nonnull
Equivalence<V> valueEquivalence()

Returns the equivalence strategy for values in this map. All methods in the Map interface which defined in terms of Object.equals(Object) equality of value objects, for example, Map.containsValue(Object) and remove(long, Object), are supposed to use this equivalence instead.

Returns:

the equivalence strategy for values in this map

See Also:

LongObjMapFactory.withValueEquivalence(net.openhft.koloboke.collect.Equivalence<? super V>)

containsKey

@Deprecated
boolean containsKey(Object key)

Deprecated. Use specialization containsKey(long) instead

Returns true if this map contains a mapping for the specified key. More formally, returns true if and only if this map contains a mapping for a key k such that (key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)

Specified by:

containsKey in interface Map<Long,V>

Parameters:

key - key whose presence in this map is to be tested

Returns:

true if this map contains a mapping for the specified key

containsKey

boolean containsKey(long key)

Returns true if this map contains a mapping for the specified key.

Parameters:

key - the long key whose presence in this map is to be tested

Returns:

true if this map contains a mapping for the specified key

get

@Nullable
@Deprecated
V get(Object key)

Deprecated. Use specialization get(long) instead

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

Specified by:

get in interface Map<Long,V>

Parameters:

key - the key whose associated value is to be returned

Returns:

the value to which the specified key is mapped, or null if this map contains no mapping for the key

get

@Nullable
V get(long key)

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey(java.lang.Object) operation may be used to distinguish these two cases.

Parameters:

key - the key whose associated value is to be returned

Returns:

the value to which the specified key is mapped, or null if this map contains no mapping for the key

getOrDefault

@Deprecated
V getOrDefault(Object key,
                        V defaultValue)

Deprecated. Use specialization getOrDefault(long, Object) instead

Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

Parameters:

key - the key whose associated value is to be returned

defaultValue - the default mapping of the key

Returns:

the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key

getOrDefault

V getOrDefault(long key,
             V defaultValue)

Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

Parameters:

key - the key whose associated value is to be returned

defaultValue - the value to return if the specified key is absent in the map

Returns:

the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key

forEach

void forEach(@Nonnull
           LongObjConsumer<? super V> action)

Performs the given action on each entry in this map until all entries have been processed or the action throws an Exception. Exceptions thrown by the action are relayed to the caller. The entries will be processed in the same order as the entry set iterator unless that order is unspecified in which case implementations may use an order which differs from the entry set iterator.

Parameters:

action - The action to be performed for each entry

See Also:

Comparison of iteration options in the library

forEachWhile

boolean forEachWhile(@Nonnull
                   LongObjPredicate<? super V> predicate)

Checks the given predicate on each entry in this map until all entries have been processed or the predicate returns false for some entry, or throws an Exception. Exceptions thrown by the predicate are relayed to the caller.

The entries will be processed in the same order as the entry set iterator unless that order is unspecified in which case implementations may use an order which differs from the entry set iterator.

If the map is empty, this method returns true immediately.

Parameters:

predicate - the predicate to be checked for each entry

Returns:

true if the predicate returned true for all entries of the map, false if it returned false for the entry

See Also:

Comparison of iteration options in the library

cursor

@Nonnull
LongObjCursor<V> cursor()

Returns a new cursor over the entries of this map. It's order is always correspond to the entry set iterator order.

Returns:

a new cursor over the entries of this map

See Also:

Comparison of iteration options in the library

keySet

@Nonnull
LongSet keySet()

Description copied from interface: java.util.Map

Returns a Set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

Specified by:

keySet in interface Map<Long,V>

Returns:

a set view of the keys contained in this map

values

@Nonnull
ObjCollection<V> values()

Description copied from interface: java.util.Map

Returns a Collection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Specified by:

values in interface Map<Long,V>

Returns:

a collection view of the values contained in this map

entrySet

@Nonnull
ObjSet<Map.Entry<Long,V>> entrySet()

Description copied from interface: java.util.Map

Returns a Set view of the mappings contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation, or through the setValue operation on a map entry returned by the iterator) the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Specified by:

entrySet in interface Map<Long,V>

Returns:

a set view of the mappings contained in this map

put

@Deprecated
V put(Long key,
               V value)

Deprecated. Use specialization put(long, Object) instead

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map m is said to contain a mapping for a key k if and only if m.containsKey(k) would return true.)

Specified by:

put in interface Map<Long,V>

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)

put

V put(long key,
    V value)

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map m is said to contain a mapping for a key k if and only if m.containsKey(k) would return true.)

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map

ClassCastException - if the class of the specified value prevents it from being stored in this map

NullPointerException - if the specified value is null, and this map does not permit null values * @throws IllegalArgumentException if some property of a specified key or value prevents it from being stored in this map

putIfAbsent

@Nullable
@Deprecated
V putIfAbsent(Long key,
                                V value)

Deprecated. Use specialization putIfAbsent(long, Object) instead

If the specified key is not already associated with a value (or is mapped to null), associates it with the given value and returns null, else returns the current value.

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map

ClassCastException - if the key or value is of an inappropriate type for this map

NullPointerException - if the specified key is null

IllegalArgumentException - if some property of the specified key or value prevents it from being stored in this map

putIfAbsent

@Nullable
V putIfAbsent(long key,
                     V value)

If the specified key is not already associated with a value (or is mapped to null), associates it with the given value and returns null, else returns the current value.

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports such values.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map

ClassCastException - if the class of the specified value prevents it from being stored in this map

NullPointerException - if the specified value is null, and this map does not permit null values * @throws IllegalArgumentException if some property of a specified key or value prevents it from being stored in this map

compute

V compute(long key,
        @Nonnull
        LongObjFunction<? super V,? extends V> remappingFunction)

Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).

If the function returns null, the mapping is removed (or remains absent if initially absent).

If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key

Throws:

ClassCastException - if the class of the computed value prevents it from being stored in this map (optional restriction)

UnsupportedOperationException - if the put operation is not supported by this map

computeIfAbsent

V computeIfAbsent(long key,
                @Nonnull
                LongFunction<? extends V> mappingFunction)

If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null. The most common usage is to construct a new object serving as an initial mapped value or memoized result.

If the function returns null no mapping is recorded.

If the function itself throws an (unchecked) exception, the exception is rethrown, and no mapping is recorded.

Parameters:

key - key with which the specified value is to be associated

mappingFunction - the function to compute a value

Returns:

the current (existing or computed) value associated with the specified key

Throws:

ClassCastException - if the class of the computed value prevents it from being stored in this map (optional restriction)

UnsupportedOperationException - if the put operation is not supported by this map

computeIfPresent

V computeIfPresent(long key,
                 @Nonnull
                 LongObjFunction<? super V,? extends V> remappingFunction)

If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.

If the function returns null, the mapping is removed.

If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or "no entry" value

Throws:

ClassCastException - if the class of the computed value prevents it from being stored in this map (optional restriction)

UnsupportedOperationException - if the put operation is not supported by this map

merge

V merge(long key,
      V value,
      @Nonnull
      BiFunction<? super V,? super V,? extends V> remappingFunction)

If the specified key is not already associated with a value (or is mapped to null), associates it with the given value, otherwise, replaces the value with the results of the given remapping function. This method may be of use when combining multiple mapped values for a key.

If the function returns null, the mapping is removed.

If the remappingFunction itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Parameters:

key - key with which the specified value is to be associated

value - the value to use if absent

remappingFunction - the function to recompute a value if present

Returns:

the new value associated with the specified key

Throws:

NullPointerException - if the remappingFunction is null

ClassCastException - if the class of the computed value prevents it from being stored in this map (optional restriction)

UnsupportedOperationException - if the put operation is not supported by this map

replace

@Nullable
@Deprecated
V replace(Long key,
                            V value)

Deprecated. Use specialization replace(long, Object) instead

Replaces the entry for the specified key only if it is currently mapped to some value.

Parameters:

key - key with which the specified value is associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map

NullPointerException - if the specified key is null

IllegalArgumentException - if some property of the specified value prevents it from being stored in this map

replace

@Nullable
V replace(long key,
                 V value)

Replaces the entry for the specified key only if it is currently mapped to some value.

Parameters:

key - key with which the specified value is associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports such values.)

Throws:

ClassCastException - if the class of the specified value prevents it from being stored in this map

NullPointerException - if the specified value is null, and this map does not permit null values * @throws IllegalArgumentException if some property of a specified key or value prevents it from being stored in this map

UnsupportedOperationException - if the put operation is not supported by this map

replace

@Deprecated
boolean replace(Long key,
                         V oldValue,
                         V newValue)

Deprecated. Use specialization replace(long, Object, Object) instead

Replaces the entry for the specified key only if currently mapped to the specified value.

Parameters:

key - key with which the specified value is associated

oldValue - value expected to be associated with the specified key

newValue - value to be associated with the specified key

Returns:

true if the value was replaced

Throws:

UnsupportedOperationException - if the put operation is not supported by this map

NullPointerException - if the specified key is null

IllegalArgumentException - if some property of the specified value prevents it from being stored in this map

replace

boolean replace(long key,
              V oldValue,
              V newValue)

Replaces the entry for the specified key only if currently mapped to the specified value.

Parameters:

key - key with which the specified value is associated

oldValue - value expected to be associated with the specified key

newValue - value to be associated with the specified key

Returns:

true if the value was replaced

Throws:

ClassCastException - if the class of the specified value prevents it from being stored in this map

NullPointerException - if the specified value is null, and this map does not permit null values * @throws IllegalArgumentException if some property of a specified key or value prevents it from being stored in this map

UnsupportedOperationException - if the put operation is not supported by this map

replaceAll

void replaceAll(@Nonnull
              LongObjFunction<? super V,? extends V> function)

Replaces each entry's value with the result of invoking the given function on that entry, in the order entries are returned by an entry set iterator, until all entries have been processed or the function throws an exception.

Parameters:

function - the function to apply to each entry

Throws:

UnsupportedOperationException - if the set operation is not supported by this map's entry set iterator or the specified replacement value is null, and this map does not permit null values (optional restriction)

ClassCastException - if the class of a replacement value prevents it from being stored in this map

IllegalArgumentException - if some property of a replacement value prevents it from being stored in this map (optional restriction)

remove

@Nullable
@Deprecated
V remove(Object key)

Deprecated. Use specialization remove(long) instead

Removes the mapping for a key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed. (The map can contain at most one such mapping.)

Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

If this map permits null values, then a return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.

The map will not contain a mapping for the specified key once the call returns.

Specified by:

remove in interface Map<Long,V>

Parameters:

key - key whose mapping is to be removed from the map

Returns:

the previous value associated with key, or null if there was no mapping for key.

remove

@Nullable
V remove(long key)

Removes the mapping for a key from this map if it is present (optional operation).

Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

A return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.

The map will not contain a mapping for the specified key once the call returns.

Parameters:

key - key whose mapping is to be removed from the map

Returns:

the previous value associated with key, or null if there was no mapping for key

Throws:

ClassCastException - if the class of the specified value prevents it from being stored in this map (optional restriction)

NullPointerException - if the specified value is null, and this map does not permit null values (optional restriction)

UnsupportedOperationException - if the remove operation is not supported by this map

remove

@Deprecated
boolean remove(Object key,
                        Object value)

Deprecated. Use specialization remove(long, Object) instead

Removes the entry for the specified key only if it is currently mapped to the specified value.

Parameters:

key - key with which the specified value is associated

value - value expected to be associated with the specified key

Returns:

true if the value was removed

Throws:

NullPointerException - if the specified key is null , or if the specified value is null, and this map does not permit null values (optional restriction)

ClassCastException - if the class of the specified value prevents it from being stored in this map (optional restriction)

UnsupportedOperationException - if the remove operation is not supported by this map

remove

boolean remove(long key,
             Object value)

Removes the entry for the specified key only if it is currently mapped to the specified value.

Parameters:

key - key with which the specified value is associated

value - value expected to be associated with the specified key

Returns:

true if the value was removed

Throws:

ClassCastException - if the class of the specified value prevents it from being stored in this map (optional restriction)

NullPointerException - if the specified value is null, and this map does not permit null values (optional restriction)

UnsupportedOperationException - if the remove operation is not supported by this map

removeIf

boolean removeIf(@Nonnull
               LongObjPredicate<? super V> filter)

Removes all of the entries of this collection that satisfy the given predicate. Errors or runtime exceptions thrown during iteration or by the predicate are relayed to the caller.

Parameters:

filter - a predicate which returns true for elements to be removed

Returns:

true if any elements were removed

Throws:

NullPointerException - if the specified filter is null

UnsupportedOperationException - if elements cannot be removed from this collection. Implementations may throw this exception if a matching element cannot be removed or if, in general, removal is not supported.

See Also:

Comparison of iteration options in the library