Package org.eclipse.collections.impl.map.mutable

Class ConcurrentHashMap<K,V>

java.lang.Object

org.eclipse.collections.impl.AbstractRichIterable<V>

org.eclipse.collections.impl.map.AbstractMapIterable<K,V>

org.eclipse.collections.impl.map.mutable.AbstractMutableMapIterable<K,V>

org.eclipse.collections.impl.map.mutable.AbstractMutableMap<K,V>

org.eclipse.collections.impl.map.mutable.ConcurrentHashMap<K,V>

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, Iterable<V>, ConcurrentMap<K,V>, Map<K,V>, InternalIterable<V>, ConcurrentMutableMap<K,V>, MapIterable<K,V>, MutableMap<K,V>, MutableMapIterable<K,V>, UnsortedMapIterable<K,V>, RichIterable<V>

public final class ConcurrentHashMap<K,V>
extends AbstractMutableMap<K,V>
implements ConcurrentMutableMap<K,V>, Externalizable

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ConcurrentHashMap()
ConcurrentHashMap(int initialCapacity)

Method Summary

Modifier and Type	Method	Description
void	clear()
MutableMap<K,V>	clone()
<E> MutableMap<K,V>	collectKeysAndValues(Iterable<E> iterable, Function<? super E,? extends K> keyFunction, Function<? super E,? extends V> valueFunction)	Adds all the entries derived from iterable to this.
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
boolean	equals(Object o)	Follows the same general contract as Map.equals(Object).
void	forEachKey(Procedure<? super K> procedure)	Calls the procedure with each key of the map.
void	forEachKeyValue(Procedure2<? super K,? super V> procedure)	Calls the procedure with each key-value pair of the map.
void	forEachValue(Procedure<? super V> procedure)	Calls the procedure with each value of the map.
<P> void	forEachWith(Procedure2<? super V,? super P> procedure, P parameter)	The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.
void	forEachWithIndex(ObjectIntProcedure<? super V> objectIntProcedure)	Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.
V	get(Object key)
V	getIfAbsent(K key, Function0<? extends V> function)	Return the value in the Map that corresponds to the specified key, or if there is no value at the key, return the result of evaluating the specified Function0.
V	getIfAbsentPut(K key, Function<? super K,? extends V> factory)
V	getIfAbsentPut(K key, Function0<? extends V> factory)	Get and return the value in the Map at the specified key.
V	getIfAbsentPut(K key, V value)	Get and return the value in the Map at the specified key.
<P> V	getIfAbsentPutWith(K key, Function<? super P,? extends V> function, P parameter)	Get and return the value in the Map at the specified key.
<P> V	getIfAbsentWith(K key, Function<? super P,? extends V> function, P parameter)	Return the value in the Map that corresponds to the specified key, or if there is no value at the key, return the result of evaluating the specified function and parameter.
int	hashCode()	Follows the same general contract as Map.hashCode().
<A> A	ifPresentApply(K key, Function<? super V,? extends A> function)	If there is a value in the Map that corresponds to the specified key return the result of applying the specified Function on the value, otherwise return null.
boolean	isEmpty()	Returns true if this iterable has zero items.
Iterator<V>	iterator()
Set<K>	keySet()
MutableMap<K,V>	newEmpty()	Creates a new instance of the same type, using the default capacity and growth parameters.
<K, V> MutableMap<K,V>	newEmpty(int capacity)	Creates a new instance of the same type, using the given capacity and the default growth parameters.
static <K, V> ConcurrentHashMap<K,V>	newMap()
static <K, V> ConcurrentHashMap<K,V>	newMap(int newSize)
static <NK, NV> ConcurrentHashMap<NK,NV>	newMap(Map<NK,NV> map)
boolean	notEmpty()	The English equivalent of !this.isEmpty()
void	parallelForEachKeyValue(List<Procedure2<K,V>> blocks, Executor executor)
void	parallelForEachValue(List<Procedure<V>> blocks, Executor executor)
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> map)
void	putAllInParallel(Map<? extends K,? extends V> map, int chunks, Executor executor)
V	putIfAbsent(K key, V value)
<P1, P2> V	putIfAbsentGetIfPresent(K key, Function2<? super K,? super V,? extends K> keyTransformer, Function3<P1,P2,? super K,? extends V> factory, P1 param1, P2 param2)	It puts an object into the map based on the key.
void	readExternal(ObjectInput in)
V	remove(Object key)
boolean	remove(Object key, Object value)
V	removeKey(K key)	Remove an entry from the map at the specified key.
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
int	size()	Returns the number of items in this iterable.
ConcurrentMutableMap<K,V>	tap(Procedure<? super V> procedure)	Executes the Procedure for each value of the map and returns this.
ImmutableMap<K,V>	toImmutable()	Returns an immutable copy of this map.
String	toString()	Returns a string with the elements of the iterable separated by commas with spaces and enclosed in square brackets.
V	updateValue(K key, Function0<? extends V> factory, Function<? super V,? extends V> function)	Looks up the value associated with key, applies the function to it, and replaces the value.
<P> V	updateValueWith(K key, Function0<? extends V> factory, Function2<? super V,? super P,? extends V> function, P parameter)	Same as MutableMapIterable.updateValue(Object, Function0, Function) with a Function2 and specified parameter which is passed to the function.
Collection<V>	values()
ConcurrentHashMap<K,V>	withAllKeyValueArguments(Pair<? extends K,? extends V>... keyValues)	Convenience var-args version of withAllKeyValues
ConcurrentHashMap<K,V>	withAllKeyValues(Iterable<? extends Pair<? extends K,? extends V>> keyValues)	This method allows mutable, fixed size, and immutable maps the ability to add elements to their existing elements.
ConcurrentHashMap<K,V>	withKeyValue(K key, V value)	This method allows mutable, fixed size, and immutable maps the ability to add elements to their existing elements.
ConcurrentHashMap<K,V>	withMap(Map<? extends K,? extends V> map)	Similar to Map.putAll(Map), but returns this instead of void
ConcurrentHashMap<K,V>	withMapIterable(MapIterable<? extends K,? extends V> mapIterable)
ConcurrentHashMap<K,V>	withoutAllKeys(Iterable<? extends K> keys)	This method allows mutable, fixed size, and immutable maps the ability to remove elements from their existing elements.
ConcurrentHashMap<K,V>	withoutKey(K key)	This method allows mutable, fixed size, and immutable maps the ability to remove elements from their existing elements.
void	writeExternal(ObjectOutput out)

Methods inherited from class org.eclipse.collections.impl.map.mutable.AbstractMutableMap

asSynchronized, asUnmodifiable, collect, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectIf, collectInt, collectLong, collectShort, collectValues, collectWith, flatCollect, flip, groupBy, groupByEach, groupByUniqueKey, partition, partitionWith, reject, reject, rejectWith, select, select, selectInstancesOf, selectWith, zip, zipWithIndex

Methods inherited from class org.eclipse.collections.impl.map.mutable.AbstractMutableMapIterable

aggregateBy, collect, countBy, countByEach, countByWith, detect, detectOptional, flipUniqueValues, getIfAbsentPutWithKey, keysView, keyValuesView, sumByDouble, sumByFloat, sumByInt, sumByLong, valuesView

Methods inherited from class org.eclipse.collections.impl.map.AbstractMapIterable

allSatisfy, allSatisfyWith, anySatisfy, anySatisfyWith, asLazy, chunk, contains, detect, detectIfNone, detectOptional, detectWith, detectWithIfNone, detectWithOptional, each, getFirst, getIfAbsentValue, getLast, getOnly, getOrDefault, noneSatisfy, noneSatisfyWith, toArray, toArray

Methods inherited from class org.eclipse.collections.impl.AbstractRichIterable

appendString, appendString, collect, collectIf, collectWith, containsAll, containsAllArguments, containsAllIterable, count, countWith, flatCollect, forEach, groupBy, groupByEach, groupByUniqueKey, injectInto, injectInto, injectInto, injectInto, injectInto, into, max, max, maxBy, min, min, minBy, reject, rejectWith, select, selectWith, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toBag, toBiMap, toList, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy, zip, zipWithIndex

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.concurrent.ConcurrentMap

compute, computeIfAbsent, computeIfPresent, forEach, merge, replaceAll

Methods inherited from interface org.eclipse.collections.api.map.ConcurrentMutableMap

getOrDefault

Methods inherited from interface org.eclipse.collections.api.InternalIterable

forEach

Methods inherited from interface org.eclipse.collections.api.map.MapIterable

detect, detectOptional, getIfAbsentValue, injectIntoKeyValue, keysView, keyValuesView, parallelStream, spliterator, stream, valuesView

Methods inherited from interface org.eclipse.collections.api.map.MutableMap

aggregateBy, aggregateBy, aggregateInPlaceBy, asSynchronized, asUnmodifiable, collect, collect, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectIf, collectInt, collectLong, collectShort, collectValues, collectWith, flatCollect, flatCollectWith, flip, flipUniqueValues, groupBy, groupByEach, groupByUniqueKey, partition, partitionWith, reject, reject, rejectWith, select, select, selectInstancesOf, selectWith, zip, zipWithIndex

Methods inherited from interface org.eclipse.collections.api.map.MutableMapIterable

add, countBy, countByEach, countByWith, getIfAbsentPutWithKey, putAllMapIterable, putPair, removeAllKeys, removeIf, sumByDouble, sumByFloat, sumByInt, sumByLong

Methods inherited from interface org.eclipse.collections.api.RichIterable

aggregateBy, allSatisfy, allSatisfyWith, anySatisfy, anySatisfyWith, appendString, appendString, appendString, asLazy, chunk, collect, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectIf, collectInt, collectLong, collectShort, collectWith, contains, containsAll, containsAllArguments, containsAllIterable, containsAny, containsAnyIterable, containsBy, containsNone, containsNoneIterable, count, countBy, countByEach, countByWith, countWith, detect, detectIfNone, detectOptional, detectWith, detectWithIfNone, detectWithOptional, each, flatCollect, flatCollectBoolean, flatCollectByte, flatCollectChar, flatCollectDouble, flatCollectFloat, flatCollectInt, flatCollectLong, flatCollectShort, flatCollectWith, forEach, getAny, getFirst, getLast, getOnly, groupBy, groupByAndCollect, groupByEach, groupByUniqueKey, injectInto, injectInto, injectInto, injectInto, injectInto, injectIntoDouble, injectIntoFloat, injectIntoInt, injectIntoLong, into, makeString, makeString, makeString, makeString, max, max, maxBy, maxByOptional, maxOptional, maxOptional, min, min, minBy, minByOptional, minOptional, minOptional, noneSatisfy, noneSatisfyWith, reduce, reduceInPlace, reduceInPlace, reject, rejectWith, select, selectWith, summarizeDouble, summarizeFloat, summarizeInt, summarizeLong, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toArray, toArray, toBag, toBiMap, toImmutableBag, toImmutableBiMap, toImmutableList, toImmutableMap, toImmutableSet, toImmutableSortedBag, toImmutableSortedBag, toImmutableSortedBagBy, toImmutableSortedList, toImmutableSortedList, toImmutableSortedListBy, toImmutableSortedSet, toImmutableSortedSet, toImmutableSortedSetBy, toList, toMap, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedList, toSortedList, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy, zip, zipWithIndex

Constructor Details

ConcurrentHashMap

public ConcurrentHashMap()

ConcurrentHashMap

public ConcurrentHashMap(int initialCapacity)

Method Details

newMap

public static <K,
V> ConcurrentHashMap<K,V> newMap()

newMap

public static <K,
V> ConcurrentHashMap<K,V> newMap(int newSize)

putIfAbsent

public V putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface ConcurrentMap<K,V>

Specified by:

putIfAbsent in interface Map<K,V>

getIfAbsentPut

public V getIfAbsentPut(K key,
 Function<? super K,? extends V> factory)

getIfAbsentPut

public V getIfAbsentPut(K key,
 Function0<? extends V> factory)

Description copied from interface: MutableMapIterable

Get and return the value in the Map at the specified key. Alternatively, if there is no value in the map at the key, return the result of evaluating the specified Function0, and put that value in the map at the specified key.

Specified by:

getIfAbsentPut in interface MutableMapIterable<K,V>

Overrides:

getIfAbsentPut in class AbstractMutableMapIterable<K,V>

getIfAbsentPut

public V getIfAbsentPut(K key,
 V value)

Description copied from interface: MutableMapIterable

Get and return the value in the Map at the specified key. Alternatively, if there is no value in the map at the key, return the specified value, and put that value in the map at the specified key.

Specified by:

getIfAbsentPut in interface MutableMapIterable<K,V>

Overrides:

getIfAbsentPut in class AbstractMutableMapIterable<K,V>

putIfAbsentGetIfPresent

public <P1,
P2> V putIfAbsentGetIfPresent(K key,
 Function2<? super K,? super V,? extends K> keyTransformer,
 Function3<P1,P2,? super K,? extends V> factory,
 P1 param1,
 P2 param2)

It puts an object into the map based on the key. It uses a copy of the key converted by transformer.

Parameters:

key - The "mutable" key, which has the same identity/hashcode as the inserted key, only during this call

keyTransformer - If the record is absent, the transformer will transform the "mutable" key into an immutable copy of the key. Note that the transformed key must have the same identity/hashcode as the original "mutable" key.

factory - It creates an object, if it is not present in the map already.

remove

public boolean remove(Object key,
 Object value)

Specified by:

remove in interface ConcurrentMap<K,V>

Specified by:

remove in interface Map<K,V>

size

public int size()

Description copied from interface: RichIterable

Returns the number of items in this iterable.

Specified by:

size in interface Map<K,V>

Specified by:

size in interface RichIterable<K>

isEmpty

public boolean isEmpty()

Description copied from interface: RichIterable

Returns true if this iterable has zero items.

Specified by:

isEmpty in interface Map<K,V>

Specified by:

isEmpty in interface RichIterable<K>

Overrides:

isEmpty in class AbstractRichIterable<V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Specified by:

containsKey in interface MapIterable<K,V>

See Also:

• Map.containsKey(Object)

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

Specified by:

containsValue in interface MapIterable<K,V>

See Also:

• Map.containsValue(Object)

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Specified by:

get in interface MapIterable<K,V>

See Also:

• Map.get(Object)

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

putAllInParallel

public void putAllInParallel(Map<? extends K,? extends V> map,
 int chunks,
 Executor executor)

putAll

public void putAll(Map<? extends K,? extends V> map)

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

replace

public boolean replace(K key,
 V oldValue,
 V newValue)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

replace

public V replace(K key,
 V value)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

parallelForEachKeyValue

public void parallelForEachKeyValue(List<Procedure2<K,V>> blocks,
 Executor executor)

parallelForEachValue

public void parallelForEachValue(List<Procedure<V>> blocks,
 Executor executor)

hashCode

public int hashCode()

Description copied from interface: MapIterable

Follows the same general contract as Map.hashCode().

Specified by:

hashCode in interface Map<K,V>

Specified by:

hashCode in interface MapIterable<K,V>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Description copied from interface: MapIterable

Follows the same general contract as Map.equals(Object).

Specified by:

equals in interface Map<K,V>

Specified by:

equals in interface MapIterable<K,V>

Overrides:

equals in class Object

toString

public String toString()

Description copied from class: AbstractRichIterable

Returns a string with the elements of the iterable separated by commas with spaces and enclosed in square brackets.

 Assert.assertEquals("[]", Lists.mutable.empty().toString());
 Assert.assertEquals("[1]", Lists.mutable.with(1).toString());
 Assert.assertEquals("[1, 2, 3]", Lists.mutable.with(1, 2, 3).toString());
 

Specified by:

toString in interface MapIterable<K,V>

Specified by:

toString in interface RichIterable<K>

Overrides:

toString in class AbstractRichIterable<V>

Returns:

a string representation of this collection.

See Also:

• AbstractCollection.toString()

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

newMap

public static <NK,
NV> ConcurrentHashMap<NK,NV> newMap(Map<NK,NV> map)

withKeyValue

public ConcurrentHashMap<K,V> withKeyValue(K key,
 V value)

Description copied from interface: MutableMapIterable

This method allows mutable, fixed size, and immutable maps the ability to add elements to their existing elements. In order to support fixed size maps, a new instance of a map would have to be returned including the keys and values of the original plus the additional key and value. In the case of mutable maps, the original map is modified and then returned. In order to use this method properly with mutable and fixed size maps the following approach must be taken:

 map = map.withKeyValue("new key", "new value");
 

In the case of FixedSizeMap, a new instance will be returned by withKeyValue, and any variables that previously referenced the original map will need to be redirected to reference the new instance. In the case of a FastMap or UnifiedMap, you will be replacing the reference to map with map, since FastMap and UnifiedMap will both return "this" after calling put on themselves.

Specified by:

withKeyValue in interface MutableMap<K,V>

Specified by:

withKeyValue in interface MutableMapIterable<K,V>

Overrides:

withKeyValue in class AbstractMutableMap<K,V>

See Also:

• Map.put(Object, Object)

withMap

public ConcurrentHashMap<K,V> withMap(Map<? extends K,? extends V> map)

Description copied from interface: MutableMapIterable

Similar to Map.putAll(Map), but returns this instead of void

Specified by:

withMap in interface ConcurrentMutableMap<K,V>

Specified by:

withMap in interface MutableMap<K,V>

Specified by:

withMap in interface MutableMapIterable<K,V>

See Also:

• Map.putAll(Map)

withMapIterable

public ConcurrentHashMap<K,V> withMapIterable(MapIterable<? extends K,? extends V> mapIterable)

Specified by:

withMapIterable in interface ConcurrentMutableMap<K,V>

Specified by:

withMapIterable in interface MutableMap<K,V>

Specified by:

withMapIterable in interface MutableMapIterable<K,V>

withAllKeyValues

public ConcurrentHashMap<K,V> withAllKeyValues(Iterable<? extends Pair<? extends K,? extends V>> keyValues)

Description copied from interface: MutableMapIterable

This method allows mutable, fixed size, and immutable maps the ability to add elements to their existing elements. In order to support fixed size maps, a new instance of a map would have to be returned including the keys and values of the original plus all the additional keys and values. In the case of mutable maps, the original map is modified and then returned. In order to use this method properly with mutable and fixed size maps the following approach must be taken:

 map = map.withAllKeyValues(FastList.newListWith(PairImpl.of("new key", "new value")));
 

In the case of FixedSizeMap, a new instance will be returned by withAllKeyValues, and any variables that previously referenced the original map will need to be redirected to reference the new instance. In the case of a FastMap or UnifiedMap, you will be replacing the reference to map with map, since FastMap and UnifiedMap will both return "this" after calling put on themselves.

Specified by:

withAllKeyValues in interface MutableMap<K,V>

Specified by:

withAllKeyValues in interface MutableMapIterable<K,V>

Overrides:

withAllKeyValues in class AbstractMutableMap<K,V>

See Also:

• Map.put(Object, Object)

withAllKeyValueArguments

public ConcurrentHashMap<K,V> withAllKeyValueArguments(Pair<? extends K,? extends V>... keyValues)

Description copied from interface: MutableMapIterable

Convenience var-args version of withAllKeyValues

Specified by:

withAllKeyValueArguments in interface MutableMap<K,V>

Specified by:

withAllKeyValueArguments in interface MutableMapIterable<K,V>

Overrides:

withAllKeyValueArguments in class AbstractMutableMap<K,V>

See Also:

• MutableMapIterable.withAllKeyValues(Iterable)

withoutKey

public ConcurrentHashMap<K,V> withoutKey(K key)

Description copied from interface: MutableMapIterable

This method allows mutable, fixed size, and immutable maps the ability to remove elements from their existing elements. In order to support fixed size maps, a new instance of a map would have to be returned including the keys and values of the original minus the key and value to be removed. In the case of mutable maps, the original map is modified and then returned. In order to use this method properly with mutable and fixed size maps the following approach must be taken:

 map = map.withoutKey("key");
 

In the case of FixedSizeMap, a new instance will be returned by withoutKey, and any variables that previously referenced the original map will need to be redirected to reference the new instance. In the case of a FastMap or UnifiedMap, you will be replacing the reference to map with map, since FastMap and UnifiedMap will both return "this" after calling remove on themselves.

Specified by:

withoutKey in interface MutableMap<K,V>

Specified by:

withoutKey in interface MutableMapIterable<K,V>

Overrides:

withoutKey in class AbstractMutableMap<K,V>

See Also:

• Map.remove(Object)

withoutAllKeys

public ConcurrentHashMap<K,V> withoutAllKeys(Iterable<? extends K> keys)

Description copied from interface: MutableMapIterable

This method allows mutable, fixed size, and immutable maps the ability to remove elements from their existing elements. In order to support fixed size maps, a new instance of a map would have to be returned including the keys and values of the original minus all the keys and values to be removed. In the case of mutable maps, the original map is modified and then returned. In order to use this method properly with mutable and fixed size maps the following approach must be taken:

 map = map.withoutAllKeys(FastList.newListWith("key1", "key2"));
 

In the case of FixedSizeMap, a new instance will be returned by withoutAllKeys, and any variables that previously referenced the original map will need to be redirected to reference the new instance. In the case of a FastMap or UnifiedMap, you will be replacing the reference to map with map, since FastMap and UnifiedMap will both return "this" after calling remove on themselves.

Specified by:

withoutAllKeys in interface MutableMap<K,V>

Specified by:

withoutAllKeys in interface MutableMapIterable<K,V>

Overrides:

withoutAllKeys in class AbstractMutableMap<K,V>

See Also:

• Map.remove(Object)

clone

public MutableMap<K,V> clone()

Specified by:

clone in interface MutableMap<K,V>

Specified by:

clone in class AbstractMutableMap<K,V>

newEmpty

public <K,
V> MutableMap<K,V> newEmpty(int capacity)

Description copied from class: AbstractMutableMap

Creates a new instance of the same type, using the given capacity and the default growth parameters.

Specified by:

newEmpty in class AbstractMutableMap<K,V>

notEmpty

public boolean notEmpty()

Description copied from interface: RichIterable

The English equivalent of !this.isEmpty()

Specified by:

notEmpty in interface RichIterable<K>

forEachWithIndex

public void forEachWithIndex(ObjectIntProcedure<? super V> objectIntProcedure)

Description copied from interface: InternalIterable

Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.

Example using a Java 8 lambda:

 people.forEachWithIndex((Person person, int index) -> LOGGER.info("Index: " + index + " person: " + person.getName()));
 

Example using an anonymous inner class:

 people.forEachWithIndex(new ObjectIntProcedure<Person>()
 {
     public void value(Person person, int index)
     {
         LOGGER.info("Index: " + index + " person: " + person.getName());
     }
 });
 

Specified by:

forEachWithIndex in interface InternalIterable<K>

Overrides:

forEachWithIndex in class AbstractMapIterable<K,V>

iterator

public Iterator<V> iterator()

Specified by:

iterator in interface Iterable<K>

Overrides:

iterator in class AbstractMutableMapIterable<K,V>

newEmpty

public MutableMap<K,V> newEmpty()

Description copied from interface: MutableMapIterable

Creates a new instance of the same type, using the default capacity and growth parameters.

Specified by:

newEmpty in interface MutableMap<K,V>

Specified by:

newEmpty in interface MutableMapIterable<K,V>

tap

public ConcurrentMutableMap<K,V> tap(Procedure<? super V> procedure)

Description copied from interface: MapIterable

Executes the Procedure for each value of the map and returns this.

 return peopleByCity.tap(person -> LOGGER.info(person.getName()));
 

Specified by:

tap in interface ConcurrentMutableMap<K,V>

Specified by:

tap in interface MapIterable<K,V>

Specified by:

tap in interface MutableMap<K,V>

Specified by:

tap in interface MutableMapIterable<K,V>

Specified by:

tap in interface RichIterable<K>

Specified by:

tap in interface UnsortedMapIterable<K,V>

Overrides:

tap in class AbstractMutableMap<K,V>

See Also:

• RichIterable.forEach(Procedure)

forEachValue

public void forEachValue(Procedure<? super V> procedure)

Description copied from interface: MapIterable

Calls the procedure with each value of the map.

     Set<String> result = UnifiedSet.newSet();
     MutableMap<Integer, String> map = this.newMapWithKeysValues(1, "One", 2, "Two", 3, "Three", 4, "Four");
     map.forEachValue(new CollectionAddProcedure<String>(result));
     Verify.assertSetsEqual(UnifiedSet.newSetWith("One", "Two", "Three", "Four"), result);
 

Specified by:

forEachValue in interface MapIterable<K,V>

Overrides:

forEachValue in class AbstractMapIterable<K,V>

forEachKey

public void forEachKey(Procedure<? super K> procedure)

Description copied from interface: MapIterable

Calls the procedure with each key of the map.

     final Collection<Integer> result = new ArrayList<Integer>();
     MutableMap<Integer, String> map = this.newMapWithKeysValues(1, "1", 2, "2", 3, "3");
     map.forEachKey(new CollectionAddProcedure<Integer>(result));
     Verify.assertContainsAll(result, 1, 2, 3);
 

Specified by:

forEachKey in interface MapIterable<K,V>

Overrides:

forEachKey in class AbstractMapIterable<K,V>

forEachKeyValue

public void forEachKeyValue(Procedure2<? super K,? super V> procedure)

Description copied from interface: MapIterable

Calls the procedure with each key-value pair of the map.

     final Collection<String> collection = new ArrayList<String>();
     MutableMap<Integer, String> map = this.newMapWithKeysValues(1, "One", 2, "Two", 3, "Three");
     map.forEachKeyValue((Integer key, String value) -> collection.add(String.valueOf(key) + value));
     Verify.assertContainsAll(collection, "1One", "2Two", "3Three");
 

Specified by:

forEachKeyValue in interface MapIterable<K,V>

collectKeysAndValues

public <E> MutableMap<K,V> collectKeysAndValues(Iterable<E> iterable,
 Function<? super E,? extends K> keyFunction,
 Function<? super E,? extends V> valueFunction)

Description copied from interface: MutableMap

Adds all the entries derived from iterable to this. The key and value for each entry is determined by applying the keyFunction and valueFunction to each item in collection. Any entry in map that has the same key as an entry in this will have its value replaced by that in map.

Specified by:

collectKeysAndValues in interface MutableMap<K,V>

removeKey

public V removeKey(K key)

Description copied from interface: MutableMapIterable

Remove an entry from the map at the specified key.

Specified by:

removeKey in interface MutableMapIterable<K,V>

Returns:

The value removed from entry at key, or null if not found.

See Also:

• Map.remove(Object)

getIfAbsentPutWith

public <P> V getIfAbsentPutWith(K key,
 Function<? super P,? extends V> function,
 P parameter)

Description copied from interface: MutableMapIterable

Get and return the value in the Map at the specified key. Alternatively, if there is no value in the map for that key return the result of evaluating the specified Function using the specified parameter, and put that value in the map at the specified key.

Specified by:

getIfAbsentPutWith in interface MutableMapIterable<K,V>

Overrides:

getIfAbsentPutWith in class AbstractMutableMapIterable<K,V>

getIfAbsent

public V getIfAbsent(K key,
 Function0<? extends V> function)

Description copied from interface: MapIterable

Return the value in the Map that corresponds to the specified key, or if there is no value at the key, return the result of evaluating the specified Function0.

Specified by:

getIfAbsent in interface MapIterable<K,V>

Overrides:

getIfAbsent in class AbstractMapIterable<K,V>

getIfAbsentWith

public <P> V getIfAbsentWith(K key,
 Function<? super P,? extends V> function,
 P parameter)

Description copied from interface: MapIterable

Return the value in the Map that corresponds to the specified key, or if there is no value at the key, return the result of evaluating the specified function and parameter.

Specified by:

getIfAbsentWith in interface MapIterable<K,V>

Overrides:

getIfAbsentWith in class AbstractMapIterable<K,V>

ifPresentApply

public <A> A ifPresentApply(K key,
 Function<? super V,? extends A> function)

Description copied from interface: MapIterable

If there is a value in the Map that corresponds to the specified key return the result of applying the specified Function on the value, otherwise return null.

Specified by:

ifPresentApply in interface MapIterable<K,V>

Overrides:

ifPresentApply in class AbstractMapIterable<K,V>

forEachWith

public <P> void forEachWith(Procedure2<? super V,? super P> procedure,
 P parameter)

Description copied from interface: InternalIterable

The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.

Example using a Java 8 lambda:

 people.forEachWith((Person person, Person other) ->
     {
         if (person.isRelatedTo(other))
         {
              LOGGER.info(person.getName());
         }
     }, fred);
 

Example using an anonymous inner class:

 people.forEachWith(new Procedure2<Person, Person>()
 {
     public void value(Person person, Person other)
     {
         if (person.isRelatedTo(other))
         {
              LOGGER.info(person.getName());
         }
     }
 }, fred);
 

Specified by:

forEachWith in interface InternalIterable<K>

Overrides:

forEachWith in class AbstractMapIterable<K,V>

updateValue

public V updateValue(K key,
 Function0<? extends V> factory,
 Function<? super V,? extends V> function)

Description copied from interface: MutableMapIterable

Looks up the value associated with key, applies the function to it, and replaces the value. If there is no value associated with key, starts it off with a value supplied by factory.

Specified by:

updateValue in interface MutableMapIterable<K,V>

Overrides:

updateValue in class AbstractMutableMapIterable<K,V>

updateValueWith

public <P> V updateValueWith(K key,
 Function0<? extends V> factory,
 Function2<? super V,? super P,? extends V> function,
 P parameter)

Description copied from interface: MutableMapIterable

Same as MutableMapIterable.updateValue(Object, Function0, Function) with a Function2 and specified parameter which is passed to the function.

Specified by:

updateValueWith in interface MutableMapIterable<K,V>

Overrides:

updateValueWith in class AbstractMutableMapIterable<K,V>

toImmutable

public ImmutableMap<K,V> toImmutable()

Description copied from interface: MutableMapIterable

Returns an immutable copy of this map. If the map is immutable, it returns itself.

Specified by:

toImmutable in interface MapIterable<K,V>

Specified by:

toImmutable in interface MutableMapIterable<K,V>

Specified by:

toImmutable in interface UnsortedMapIterable<K,V>

Overrides:

toImmutable in class AbstractMutableMap<K,V>