Interface ImmutableMapIterable<K,V>
- All Superinterfaces:
InternalIterable<V>
,Iterable<V>
,MapIterable<K,V>
,RichIterable<V>
- All Known Subinterfaces:
ImmutableBiMap<K,V>
,ImmutableMap<K,V>
,ImmutableOrderedMap<K,V>
,ImmutableSortedMap<K,V>
- All Known Implementing Classes:
AbstractImmutableBiMap
,AbstractImmutableMap
,AbstractImmutableSortedMap
,ImmutableTreeMap
,ImmutableUnifiedMap
,ImmutableUnifiedMapWithHashingStrategy
public interface ImmutableMapIterable<K,V> extends MapIterable<K,V>
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Method Summary
Modifier and Type Method Description default <K1, V1, V2> ImmutableMapIterable<K1,V2>
aggregateBy(Function<? super K,? extends K1> keyFunction, Function<? super V,? extends V1> valueFunction, Function0<? extends V2> zeroValueFactory, Function2<? super V2,? super V1,? extends V2> nonMutatingAggregator)
Applies an aggregate function over the map grouping results into a map based on the specific key and value groupBy functions.default <KK, VV> ImmutableMapIterable<KK,VV>
aggregateBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Function2<? super VV,? super V,? extends VV> nonMutatingAggregator)
Applies an aggregate function over the iterable grouping results into a map based on the specific groupBy function.default <KK, VV> ImmutableMapIterable<KK,VV>
aggregateInPlaceBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Procedure2<? super VV,? super V> mutatingAggregator)
Applies an aggregate procedure over the iterable grouping results into a Map based on the specific groupBy function.Map<K,V>
castToMap()
<K2, V2> ImmutableMapIterable<K2,V2>
collect(Function2<? super K,? super V,Pair<K2,V2>> function)
For each key and value of the map the function is evaluated.<R> ImmutableMapIterable<K,R>
collectValues(Function2<? super K,? super V,? extends R> function)
For each key and value of the map the function is evaluated.default <V1> ImmutableBag<V1>
countBy(Function<? super V,? extends V1> function)
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.default <V1> ImmutableBag<V1>
countByEach(Function<? super V,? extends Iterable<V1>> function)
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.default <V1, P> ImmutableBag<V1>
countByWith(Function2<? super V,? super P,? extends V1> function, P parameter)
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.ImmutableMultimap<V,K>
flip()
Given a map from Domain->
Range return a multimap from Range->
Domain.ImmutableMapIterable<V,K>
flipUniqueValues()
Return the MapIterable that is obtained by flipping the direction of this map and making the associations from value to key.<V1> ImmutableMultimap<V1,V>
groupBy(Function<? super V,? extends V1> function)
For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.<V1> ImmutableMultimap<V1,V>
groupByEach(Function<? super V,? extends Iterable<V1>> function)
Similar toRichIterable.groupBy(Function)
, except the result of evaluating function will return a collection of keys for each value.<V1> ImmutableMapIterable<V1,V>
groupByUniqueKey(Function<? super V,? extends V1> function)
For each element of the iterable, the function is evaluated and he results of these evaluations are collected into a new map, where the transformed value is the key.ImmutableMapIterable<K,V>
newWithAllKeyValueArguments(Pair<? extends K,? extends V>... keyValuePairs)
ImmutableMapIterable<K,V>
newWithAllKeyValues(Iterable<? extends Pair<? extends K,? extends V>> keyValues)
ImmutableMapIterable<K,V>
newWithKeyValue(K key, V value)
ImmutableMapIterable<K,V>
newWithoutAllKeys(Iterable<? extends K> keys)
ImmutableMapIterable<K,V>
newWithoutKey(K key)
PartitionImmutableCollection<V>
partition(Predicate<? super V> predicate)
Filters a collection into a PartitionedIterable based on the evaluation of the predicate.ImmutableCollection<V>
reject(Predicate<? super V> predicate)
Returns all elements of the source collection that return false when evaluating of the predicate.ImmutableMapIterable<K,V>
reject(Predicate2<? super K,? super V> predicate)
For each key and value of the map the predicate is evaluated, if the result of the evaluation is false, that key and value are returned in a new map.<P> ImmutableCollection<V>
rejectWith(Predicate2<? super V,? super P> predicate, P parameter)
Similar toRichIterable.reject(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.ImmutableCollection<V>
select(Predicate<? super V> predicate)
Returns all elements of the source collection that return true when evaluating the predicate.ImmutableMapIterable<K,V>
select(Predicate2<? super K,? super V> predicate)
For each key and value of the map the predicate is evaluated, if the result of the evaluation is true, that key and value are returned in a new map.<S> ImmutableCollection<S>
selectInstancesOf(Class<S> clazz)
Returns all elements of the source collection that are instances of the Classclazz
.<P> ImmutableCollection<V>
selectWith(Predicate2<? super V,? super P> predicate, P parameter)
Similar toRichIterable.select(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.ImmutableMapIterable<K,V>
tap(Procedure<? super V> procedure)
Executes the Procedure for each value of the map and returnsthis
.<S> ImmutableCollection<Pair<V,S>>
zip(Iterable<S> that)
Returns aRichIterable
formed from thisRichIterable
and anotherRichIterable
by combining corresponding elements in pairs.ImmutableCollection<Pair<V,Integer>>
zipWithIndex()
Zips thisRichIterable
with its indices.Methods inherited from interface org.eclipse.collections.api.InternalIterable
forEach, forEachWith, forEachWithIndex
Methods inherited from interface org.eclipse.collections.api.map.MapIterable
containsKey, containsValue, detect, detectOptional, equals, forEachKey, forEachKeyValue, forEachValue, get, getIfAbsent, getIfAbsentValue, getIfAbsentWith, getOrDefault, hashCode, ifPresentApply, keysView, keyValuesView, parallelStream, spliterator, stream, toImmutable, toString, valuesView
Methods inherited from interface org.eclipse.collections.api.RichIterable
aggregateBy, allSatisfy, allSatisfyWith, anySatisfy, anySatisfyWith, appendString, appendString, appendString, asLazy, chunk, collect, collect, collectBoolean, collectBoolean, collectByte, collectByte, collectChar, collectChar, collectDouble, collectDouble, collectFloat, collectFloat, collectIf, collectIf, collectInt, collectInt, collectLong, collectLong, collectShort, collectShort, collectWith, collectWith, contains, containsAll, containsAllArguments, containsAllIterable, containsBy, count, countBy, countByEach, countByWith, countWith, detect, detectIfNone, detectOptional, detectWith, detectWithIfNone, detectWithOptional, each, flatCollect, flatCollect, flatCollectBoolean, flatCollectByte, flatCollectChar, flatCollectDouble, flatCollectFloat, flatCollectInt, flatCollectLong, flatCollectShort, flatCollectWith, flatCollectWith, forEach, getAny, getFirst, getLast, getOnly, groupBy, groupByAndCollect, groupByEach, groupByUniqueKey, injectInto, injectInto, injectInto, injectInto, injectInto, into, isEmpty, makeString, makeString, makeString, max, max, maxBy, maxByOptional, maxOptional, maxOptional, min, min, minBy, minByOptional, minOptional, minOptional, noneSatisfy, noneSatisfyWith, notEmpty, partitionWith, reduce, reduceInPlace, reduceInPlace, reject, rejectWith, select, selectWith, size, sumByDouble, sumByFloat, sumByInt, sumByLong, summarizeDouble, summarizeFloat, summarizeInt, summarizeLong, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toArray, toArray, toBag, toBiMap, toList, toMap, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedList, toSortedList, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy, zip, zipWithIndex
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Method Details
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castToMap
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newWithKeyValue
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newWithAllKeyValues
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newWithAllKeyValueArguments
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newWithoutKey
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newWithoutAllKeys
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tap
Description copied from interface:MapIterable
Executes the Procedure for each value of the map and returnsthis
.return peopleByCity.tap(person -> LOGGER.info(person.getName()));
- Specified by:
tap
in interfaceMapIterable<K,V>
- Specified by:
tap
in interfaceRichIterable<K>
- See Also:
RichIterable.forEach(Procedure)
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flipUniqueValues
ImmutableMapIterable<V,K> flipUniqueValues()Description copied from interface:MapIterable
Return the MapIterable that is obtained by flipping the direction of this map and making the associations from value to key.MapIterable<Integer, String> map = this.newMapWithKeysValues(1, "1", 2, "2", 3, "3"); MapIterable<String, Integer> result = map.flipUniqueValues(); Assert.assertTrue(result.equals(UnifiedMap.newWithKeysValues("1", 1, "2", 2, "3", 3)));
- Specified by:
flipUniqueValues
in interfaceMapIterable<K,V>
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flip
ImmutableMultimap<V,K> flip()Description copied from interface:MapIterable
Given a map from Domain->
Range return a multimap from Range->
Domain. We chose the name 'flip' rather than 'invert' or 'transpose' since this method does not have the property of applying twice returns the original.Since the keys in the input are unique, the values in the output are unique, so the return type should be a SetMultimap. However since SetMultimap and SortedSetMultimap don't inherit from one another, SetMultimap here does not allow SortedMapIterable to have a SortedSetMultimap return. Thus we compromise and call this Multimap, even though all implementations will be a SetMultimap or SortedSetMultimap.
- Specified by:
flip
in interfaceMapIterable<K,V>
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select
Description copied from interface:MapIterable
For each key and value of the map the predicate is evaluated, if the result of the evaluation is true, that key and value are returned in a new map.MapIterable<City, Person> selected = peopleByCity.select((city, person) -> city.getName().equals("Anytown") && person.getLastName().equals("Smith"));
- Specified by:
select
in interfaceMapIterable<K,V>
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reject
Description copied from interface:MapIterable
For each key and value of the map the predicate is evaluated, if the result of the evaluation is false, that key and value are returned in a new map.MapIterable<City, Person> rejected = peopleByCity.reject((city, person) -> city.getName().equals("Anytown") && person.getLastName().equals("Smith"));
- Specified by:
reject
in interfaceMapIterable<K,V>
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collect
<K2, V2> ImmutableMapIterable<K2,V2> collect(Function2<? super K,? super V,Pair<K2,V2>> function)Description copied from interface:MapIterable
For each key and value of the map the function is evaluated. The results of these evaluations are returned in a new map. The map returned will use the values projected from the function rather than the original values.MapIterable<String, String> collected = peopleByCity.collect((City city, Person person) -> Pair.of(city.getCountry(), person.getAddress().getCity()));
- Specified by:
collect
in interfaceMapIterable<K,V>
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collectValues
<R> ImmutableMapIterable<K,R> collectValues(Function2<? super K,? super V,? extends R> function)Description copied from interface:MapIterable
For each key and value of the map the function is evaluated. The results of these evaluations are returned in a new map. The map returned will use the values projected from the function rather than the original values.MapIterable<City, String> collected = peopleByCity.collectValues((City city, Person person) -> person.getFirstName() + " " + person.getLastName());
- Specified by:
collectValues
in interfaceMapIterable<K,V>
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select
Description copied from interface:RichIterable
Returns all elements of the source collection that return true when evaluating the predicate. This method is also commonly called filter.Example using a Java 8 lambda expression:
RichIterable<Person> selected = people.select(person -> person.getAddress().getCity().equals("London"));
Example using an anonymous inner class:
RichIterable<Person> selected = people.select(new Predicate<Person>() { public boolean accept(Person person) { return person.getAddress().getCity().equals("London"); } });
- Specified by:
select
in interfaceRichIterable<K>
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selectWith
Description copied from interface:RichIterable
Similar toRichIterable.select(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.E.g. return a
Collection
of Person elements where the person has an age greater than or equal to 18 yearsExample using a Java 8 lambda expression:
RichIterable<Person> selected = people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18));
Example using an anonymous inner class:
RichIterable<Person> selected = people.selectWith(new Predicate2<Person, Integer>() { public boolean accept(Person person, Integer age) { return person.getAge()>= age; } }, Integer.valueOf(18));
- Specified by:
selectWith
in interfaceRichIterable<K>
- Parameters:
predicate
- aPredicate2
to use as the select criteriaparameter
- a parameter to pass in for evaluation of the second argumentP
inpredicate
- See Also:
RichIterable.select(Predicate)
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reject
Description copied from interface:RichIterable
Returns all elements of the source collection that return false when evaluating of the predicate. This method is also sometimes called filterNot and is the equivalent of calling iterable.select(Predicates.not(predicate)).Example using a Java 8 lambda expression:
RichIterable<Person> rejected = people.reject(person -> person.person.getLastName().equals("Smith"));
Example using an anonymous inner class:
RichIterable<Person> rejected = people.reject(new Predicate<Person>() { public boolean accept(Person person) { return person.person.getLastName().equals("Smith"); } });
- Specified by:
reject
in interfaceRichIterable<K>
- Parameters:
predicate
- aPredicate
to use as the reject criteria- Returns:
- a RichIterable that contains elements that cause
Predicate.accept(Object)
method to evaluate to false
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rejectWith
Description copied from interface:RichIterable
Similar toRichIterable.reject(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.E.g. return a
Collection
of Person elements where the person has an age greater than or equal to 18 yearsExample using a Java 8 lambda expression:
RichIterable<Person> rejected = people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18));
Example using an anonymous inner class:
MutableList<Person> rejected = people.rejectWith(new Predicate2<Person, Integer>() { public boolean accept(Person person, Integer age) { return person.getAge() < age; } }, Integer.valueOf(18));
- Specified by:
rejectWith
in interfaceRichIterable<K>
- Parameters:
predicate
- aPredicate2
to use as the select criteriaparameter
- a parameter to pass in for evaluation of the second argumentP
inpredicate
- See Also:
RichIterable.select(Predicate)
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partition
Description copied from interface:RichIterable
Filters a collection into a PartitionedIterable based on the evaluation of the predicate.Example using a Java 8 lambda expression:
PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(person -> person.getAddress().getState().getName().equals("New York"));
Example using an anonymous inner class:
PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(new Predicate<Person>() { public boolean accept(Person person) { return person.getAddress().getState().getName().equals("New York"); } });
- Specified by:
partition
in interfaceRichIterable<K>
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selectInstancesOf
Description copied from interface:RichIterable
Returns all elements of the source collection that are instances of the Classclazz
.RichIterable<Integer> integers = List.mutable.with(new Integer(0), new Long(0L), new Double(0.0)).selectInstancesOf(Integer.class);
- Specified by:
selectInstancesOf
in interfaceRichIterable<K>
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countBy
Description copied from interface:RichIterable
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.- Specified by:
countBy
in interfaceRichIterable<K>
- Since:
- 9.0
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countByWith
default <V1, P> ImmutableBag<V1> countByWith(Function2<? super V,? super P,? extends V1> function, P parameter)Description copied from interface:RichIterable
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.- Specified by:
countByWith
in interfaceRichIterable<K>
- Since:
- 9.0
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countByEach
Description copied from interface:RichIterable
This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.- Specified by:
countByEach
in interfaceRichIterable<K>
- Since:
- 10.0.0
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groupBy
Description copied from interface:RichIterable
For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.Example using a Java 8 method reference:
Multimap<String, Person> peopleByLastName = people.groupBy(Person::getLastName);
Example using an anonymous inner class:
Multimap<String, Person> peopleByLastName = people.groupBy(new Function<Person, String>() { public String valueOf(Person person) { return person.getLastName(); } });
- Specified by:
groupBy
in interfaceRichIterable<K>
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groupByEach
Description copied from interface:RichIterable
Similar toRichIterable.groupBy(Function)
, except the result of evaluating function will return a collection of keys for each value.- Specified by:
groupByEach
in interfaceRichIterable<K>
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groupByUniqueKey
Description copied from interface:RichIterable
For each element of the iterable, the function is evaluated and he results of these evaluations are collected into a new map, where the transformed value is the key. The generated keys must each be unique, or else an exception is thrown.- Specified by:
groupByUniqueKey
in interfaceRichIterable<K>
- See Also:
RichIterable.groupBy(Function)
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zip
Description copied from interface:RichIterable
Returns aRichIterable
formed from thisRichIterable
and anotherRichIterable
by combining corresponding elements in pairs. If one of the twoRichIterable
s is longer than the other, its remaining elements are ignored.- Specified by:
zip
in interfaceRichIterable<K>
- Type Parameters:
S
- the type of the second half of the returned pairs- Parameters:
that
- TheRichIterable
providing the second half of each result pair- Returns:
- A new
RichIterable
containing pairs consisting of corresponding elements of thisRichIterable
and that. The length of the returnedRichIterable
is the minimum of the lengths of thisRichIterable
and that.
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zipWithIndex
ImmutableCollection<Pair<V,Integer>> zipWithIndex()Description copied from interface:RichIterable
Zips thisRichIterable
with its indices.- Specified by:
zipWithIndex
in interfaceRichIterable<K>
- Returns:
- A new
RichIterable
containing pairs consisting of all elements of thisRichIterable
paired with their index. Indices start at 0. - See Also:
RichIterable.zip(Iterable)
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aggregateInPlaceBy
default <KK, VV> ImmutableMapIterable<KK,VV> aggregateInPlaceBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Procedure2<? super VV,? super V> mutatingAggregator)Description copied from interface:RichIterable
Applies an aggregate procedure over the iterable grouping results into a Map based on the specific groupBy function. Aggregate results are required to be mutable as they will be changed in place by the procedure. A second function specifies the initial "zero" aggregate value to work with (i.e. new AtomicInteger(0)).- Specified by:
aggregateInPlaceBy
in interfaceRichIterable<K>
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aggregateBy
default <KK, VV> ImmutableMapIterable<KK,VV> aggregateBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Function2<? super VV,? super V,? extends VV> nonMutatingAggregator)Description copied from interface:RichIterable
Applies an aggregate function over the iterable grouping results into a map based on the specific groupBy function. Aggregate results are allowed to be immutable as they will be replaced in place in the map. A second function specifies the initial "zero" aggregate value to work with (i.e. Integer.valueOf(0)).- Specified by:
aggregateBy
in interfaceRichIterable<K>
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aggregateBy
default <K1, V1, V2> ImmutableMapIterable<K1,V2> aggregateBy(Function<? super K,? extends K1> keyFunction, Function<? super V,? extends V1> valueFunction, Function0<? extends V2> zeroValueFactory, Function2<? super V2,? super V1,? extends V2> nonMutatingAggregator)Description copied from interface:MapIterable
Applies an aggregate function over the map grouping results into a map based on the specific key and value groupBy functions. Aggregate results are allowed to be immutable as they will be replaced in place in the map. A second function specifies the initial "zero" aggregate value to work with.MapIterable<String, Interval> map = Maps.mutable.with("oneToFive", Interval.fromTo(1, 5), "sixToNine", Interval.fromTo(6, 9)); MapIterable<String, Long> result = map.aggregateBy( eachKey -> { return eachKey.equals("oneToFive") ? "lessThanSix" : "greaterOrEqualsToSix"; }, each -> each.sumOfInt(Integer::intValue), () -> 0L, (argument1, argument2) -> argument1 + argument2); MapIterable<String, Long> expected = Maps.mutable.with("lessThanSix", Interval.fromTo(1, 5).sumOfInt(Integer::intValue), "greaterOrEqualsToSix", Interval.fromTo(6, 9).sumOfInt(Integer::intValue)); Assert.assertEquals(expected, result);
- Specified by:
aggregateBy
in interfaceMapIterable<K,V>
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