net.openhft.collect.map
Interface ObjFloatMap<K>

All Superinterfaces:

Container, Map<K,Float>

All Known Subinterfaces:

HashObjFloatMap<K>

public interface ObjFloatMap<K>
extends Map<K,Float>, Container

A Map specialization with Object keys and float values.

See Also:

ObjFloatMapFactory

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Method Summary

float	addValue(K key, float addition) Adds the given addition value to the value associated with the specified key, or default value if this map contains no mapping for the key, and associates the resulting value with the key.
float	addValue(K key, float addition, float defaultValue) Adds the given addition value to the value associated with the specified key, or defaultValue if this map contains no mapping for the key, and associates the resulting value with the key.
float	compute(K key, ObjFloatToFloatFunction<? super K> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or default value if there is no current mapping).
float	computeIfAbsent(K key, ToFloatFunction<? super K> mappingFunction) If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map .
float	computeIfPresent(K key, ObjFloatToFloatFunction<? super K> remappingFunction) If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
boolean	containsValue(float value) Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(Object value) Deprecated. Use specialization containsValue(float) instead
ObjFloatCursor<K>	cursor() Returns a new cursor over the entries of this map.
float	defaultValue() Returns the default value of this map, which is used instead of null in primitive specialization methods, when the key is absent in the map.
ObjSet<Map.Entry<K,Float>>	entrySet()
void	forEach(ObjFloatConsumer<? super K> 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(ObjFloatPredicate<? super K> 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.
Float	get(Object key) Deprecated. Use specialization getFloat(Object) instead
float	getFloat(Object key) Returns the value to which the specified key is mapped, or default value if this map contains no mapping for the key.
float	getOrDefault(Object key, float defaultValue) Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
Float	getOrDefault(Object key, Float defaultValue) Deprecated. Use specialization getOrDefault(Object, float) instead
Equivalence<K>	keyEquivalence() Returns the equivalence strategy for keys in this map.
ObjSet<K>	keySet()
float	merge(K key, float value, FloatBinaryOperator remappingFunction) If the specified key is not already associated with a value, associates it with the given value, otherwise, replaces the value with the results of the given remapping function.
float	put(K key, float value) Associates the specified value with the specified key in this map (optional operation).
Float	put(K key, Float value) Deprecated. Use specialization put(Object, float) instead
float	putIfAbsent(K key, float value) If the specified key is not already associated with a value, associates it with the given value and returns default value, else returns the current value.
Float	putIfAbsent(K key, Float value) Deprecated. Use specialization putIfAbsent(Object, float) instead
Float	remove(Object key) Deprecated. Use specialization removeAsFloat(Object) instead
boolean	remove(Object key, float value) Removes the entry for the specified key only if it is currently mapped to the specified value.
boolean	remove(Object key, Object value) Deprecated. Use specialization remove(Object, float) instead
float	removeAsFloat(Object key) Removes the mapping for a key from this map if it is present (optional operation).
boolean	removeIf(ObjFloatPredicate<? super K> filter) Removes all of the entries of this collection that satisfy the given predicate.
float	replace(K key, float value) Replaces the entry for the specified key only if it is currently mapped to some value.
Float	replace(K key, Float value) Deprecated. Use specialization replace(Object, float) instead
boolean	replace(K key, float oldValue, float newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
boolean	replace(K key, Float oldValue, Float newValue) Deprecated. Use specialization replace(Object, float, float) instead
void	replaceAll(ObjFloatToFloatFunction<? super K> 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.
FloatCollection	values()

Methods inherited from interface java.util.Map

clear, containsKey, equals, hashCode, isEmpty, putAll, size

Methods inherited from interface net.openhft.collect.Container

clear, ensureCapacity, isEmpty, shrink, size, sizeAsLong

Method Detail

keyEquivalence

@Nullable
Equivalence<K> keyEquivalence()

Returns the equivalence strategy for keys in this map. All methods in the Map interface which defined in terms of Object.equals(Object) equality of key objects (almost all methods, actually), are supposed to use this equivalence instead.

Returns:

the equivalence strategy for keys in this map, or null if it is the default Object equality

See Also:

HashObjFloatMapFactory.withKeyEquivalence(net.openhft.collect.Equivalence)

defaultValue

float defaultValue()

Returns the default value of this map, which is used instead of null in primitive specialization methods, when the key is absent in the map.

Returns:

the default value of this map

See Also:

ObjFloatMapFactory.withDefaultValue(float)

containsValue

@Deprecated
boolean containsValue(Object value)

Deprecated. Use specialization containsValue(float) instead

Specified by:

containsValue in interface Map<K,Float>

containsValue

boolean containsValue(float value)

Returns true if this map maps one or more keys to the specified value. This operation will probably require time linear in the map size for most implementations of the ObjFloatMap interface.

Parameters:

value - the float value whose presence in this map is to be tested

Returns:

true if this map maps one or more keys to the specified value

get

@Nullable
@Deprecated
Float get(Object key)

Deprecated. Use specialization getFloat(Object) instead

Specified by:

get in interface Map<K,Float>

getFloat

float getFloat(Object key)

Returns the value to which the specified key is mapped, or default value 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 keyEquivalence() == null ? (key==null ? k==null : key.equals(k)) : keyEquivalence().nullableEquivalent(k, key), then this method returns v; otherwise it returns default value. (There can be at most one such mapping.)

Parameters:

key - the key whose associated value is to be returned

Returns:

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

Throws:

ClassCastException - if the key is of an inappropriate type for this map (optional restriction)

NullPointerException - if the specified key is null and this map does not permit null keys (optional restriction)

getOrDefault

@Deprecated
Float getOrDefault(Object key,
                              Float defaultValue)

Deprecated. Use specialization getOrDefault(Object, float) 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

Throws:

ClassCastException - if the key is of an inappropriate type for this map (optional restriction)

NullPointerException - if the specified key is null and this map does not permit null keys (optional restriction)

getOrDefault

float getOrDefault(Object key,
                   float 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

Returns:

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

Throws:

ClassCastException - if the key is of an inappropriate type for this map (optional restriction)

NullPointerException - if the specified key is null and this map does not permit null keys (optional restriction)

forEach

void forEach(@Nonnull
             ObjFloatConsumer<? super K> 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
                     ObjFloatPredicate<? super K> 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
ObjFloatCursor<K> 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
ObjSet<K> keySet()

Specified by:

keySet in interface Map<K,Float>

values

@Nonnull
FloatCollection values()

Specified by:

values in interface Map<K,Float>

entrySet

@Nonnull
ObjSet<Map.Entry<K,Float>> entrySet()

Specified by:

entrySet in interface Map<K,Float>

put

@Deprecated
Float put(K key,
                     Float value)

Deprecated. Use specialization put(Object, float) instead

Specified by:

put in interface Map<K,Float>

put

float put(K key,
          float 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 default value if there was no mapping for key. (A default value return can also indicate that the map previously associated default value with key.)

Throws:

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

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

NullPointerException - if the specified key is null, and this map does not permit null keys

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

putIfAbsent

@Nullable
@Deprecated
Float putIfAbsent(K key,
                                      Float value)

Deprecated. Use specialization putIfAbsent(Object, float) instead

If the specified key is not already associated with a value, 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 value is null

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

putIfAbsent

float putIfAbsent(K key,
                  float value)

If the specified key is not already associated with a value, associates it with the given value and returns default value, 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 default value if there was no mapping for the key. (A default value return can also indicate that the map previously associated default value 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 key prevents it from being stored in this map

NullPointerException - if the specified key is null, and this map does not permit null keys

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

compute

float compute(K key,
              @Nonnull
              ObjFloatToFloatFunction<? super K> remappingFunction)

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

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 if the specified key is null and this map does not support null keys

Throws:

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

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

computeIfAbsent

float computeIfAbsent(K key,
                      @Nonnull
                      ToFloatFunction<? super K> mappingFunction)

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

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 or if the specified key is null and this map does not support null keys

Throws:

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

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

computeIfPresent

float computeIfPresent(K key,
                       @Nonnull
                       ObjFloatToFloatFunction<? super K> remappingFunction)

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

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 or if the specified key is null and this map does not support null keys

Throws:

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

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

merge

float merge(K key,
            float value,
            @Nonnull
            FloatBinaryOperator remappingFunction)

If the specified key is not already associated with a value, 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 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 or if the specified key is null and this map does not support null keys or if the specified value is null and this map does not support null values

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

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

addValue

float addValue(K key,
               float addition)

Adds the given addition value to the value associated with the specified key, or default value if this map contains no mapping for the key, and associates the resulting value with the key.

Parameters:

key - the key to which value add the given value

addition - the value to add

Returns:

the new value associated with the specified key or if the specified key is null and this map does not support null keys

Throws:

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

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

addValue

float addValue(K key,
               float addition,
               float defaultValue)

Adds the given addition value to the value associated with the specified key, or defaultValue if this map contains no mapping for the key, and associates the resulting value with the key.

This version of addValue(Object, float) is useful if you want to count values from the different initial value, than the default value of this map.

Parameters:

key - the key to which value add the given value

addition - the value to add

defaultValue - the value to be used if the map contains no mapping for the given key

Returns:

the new value associated with the specified key or if the specified key is null and this map does not support null keys

Throws:

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

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

replace

@Nullable
@Deprecated
Float replace(K key,
                                  Float value)

Deprecated. Use specialization replace(Object, float) 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.

Throws:

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

NullPointerException - if the specified value is null

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

replace

float replace(K key,
              float 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 default value if there was no mapping for the key. (A default value return can also indicate that the map previously associated default value with the key, if the implementation supports such values.)

Throws:

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

NullPointerException - if the specified key is null, and this map does not permit null keys

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(K key,
                           Float oldValue,
                           Float newValue)

Deprecated. Use specialization replace(Object, float, float) 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 value is null

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

replace

boolean replace(K key,
                float oldValue,
                float 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 key prevents it from being stored in this map

NullPointerException - if the specified key is null, and this map does not permit null keys

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
                ObjFloatToFloatFunction<? super K> 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

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

remove

@Nullable
@Deprecated
Float remove(Object key)

Deprecated. Use specialization removeAsFloat(Object) instead

Specified by:

remove in interface Map<K,Float>

removeAsFloat

float removeAsFloat(Object key)

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

More formally, if this map contains a mapping from a key k to a value v such that keyEquivalence() == null ? (key==null ? k==null : key.equals(k)) : keyEquivalence().nullableEquivalent(k, key), 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 default value if the map contained no mapping for the key.

A return value of default value 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 default value.

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 default value if there was no mapping for key

Throws:

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

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

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

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

remove

boolean remove(Object key,
               float 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 key prevents it from being stored in this map (optional restriction)

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

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

removeIf

boolean removeIf(@Nonnull
                 ObjFloatPredicate<? super K> 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