Eclipse Collections 13.0.0 · org.eclipse.collections.impl.collector.Collectors2

Modifier and Type	Field and Description
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_BAG_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_LIST_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_SET_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_SORTED_BAG_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_SORTED_LIST_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_SORTED_SET_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_IMMUTABLE_STACK_COLLECTOR
private static final Collector<?, ?, String>	DEFAULT_MAKE_STRING
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_BAG_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_LIST_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_SET_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_SORTED_BAG_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_SORTED_LIST_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_SORTED_SET_COLLECTOR
private static final Collector<?, ?, ?>	DEFAULT_MUTABLE_STACK_COLLECTOR
private static final Collector.Characteristics[]	EMPTY_CHARACTERISTICS

Access	Constructor and Description
private	Collectors2()

Method Summary

Modifier and Type	Method and Description
public static <T, K, R extends MutableMapIterable<K, T>> Collector<T, ?, R>	aggregateBy(Function<? super T, ? extends K> groupBy, Function0<? extends T> zeroValueFactory, Function2<? super T, ? super T, ? extends T> aggregator, Supplier<R> supplier) Groups the elements using the `groupBy` function and all the elements that map to the same key are aggregated together using the `aggregator` function.
public static <T> Collector<T, ?, MutableList<MutableList<T>>>	chunk(int size) Partitions elements in fixed size chunks.
public static <T, V, R extends Collection<V>> Collector<T, ?, R>	collect(Function<? super T, ? extends V> function, Supplier<R> supplier) Returns a new collection with the results of applying the specified function on each element of the source collection.
public static <T, R extends MutableBooleanCollection> Collector<T, ?, R>	collectBoolean(BooleanFunction<? super T> function, Supplier<R> supplier) Returns a new MutableBooleanCollection with the results of applying the specified BooleanFunction on each element of the source.
public static <T, R extends MutableByteCollection> Collector<T, ?, R>	collectByte(ByteFunction<? super T> function, Supplier<R> supplier) Returns a new MutableByteCollection with the results of applying the specified ByteFunction on each element of the source.
public static <T, R extends MutableCharCollection> Collector<T, ?, R>	collectChar(CharFunction<? super T> function, Supplier<R> supplier) Returns a new MutableCharCollection with the results of applying the specified CharFunction on each element of the source.
public static <T, R extends MutableDoubleCollection> Collector<T, ?, R>	collectDouble(DoubleFunction<? super T> function, Supplier<R> supplier) Returns a new MutableDoubleCollection with the results of applying the specified DoubleFunction on each element of the source.
public static <T, R extends MutableFloatCollection> Collector<T, ?, R>	collectFloat(FloatFunction<? super T> function, Supplier<R> supplier) Returns a new MutableFloatCollection with the results of applying the specified FloatFunction on each element of the source.
public static <T, R extends MutableIntCollection> Collector<T, ?, R>	collectInt(IntFunction<? super T> function, Supplier<R> supplier) Returns a new MutableIntCollection with the results of applying the specified IntFunction on each element of the source.
public static <T, R extends MutableLongCollection> Collector<T, ?, R>	collectLong(LongFunction<? super T> function, Supplier<R> supplier) Returns a new MutableLongCollection with the results of applying the specified LongFunction on each element of the source.
public static <T, R extends MutableShortCollection> Collector<T, ?, R>	collectShort(ShortFunction<? super T> function, Supplier<R> supplier) Returns a new MutableShortCollection with the results of applying the specified ShortFunction on each element of the source.
public static <T, P, V, R extends Collection<V>> Collector<T, ?, R>	collectWith(Function2<? super T, ? super P, ? extends V> function, P parameter, Supplier<R> supplier) Returns a new collection with the results of applying the specified function on each element of the source collection with the specified parameter.
public static <T, K> Collector<T, ?, MutableBag<K>>	countBy(Function<? super T, ? extends K> function) Returns the counts of all the values returned by applying the specified function to each item of the Stream.
public static <T, K> Collector<T, ?, MutableBag<K>>	countByEach(Function<? super T, ? extends Iterable<K>> function) Same as `countBy(Function)`, except the result of applying the specified function will return a collection of keys for each value.
public static <T, V, R extends Collection<V>> Collector<T, ?, R>	flatCollect(Function<? super T, ? extends Iterable<V>> function, Supplier<R> supplier) The method `flatCollect` is a special case of `collect(Function, Supplier)`.
public static <T, K, R extends MutableMultimap<K, T>> Collector<T, ?, R>	groupBy(Function<? super T, ? extends K> groupBy, Supplier<R> supplier) Returns the elements as an MutableMultimap grouping each element using the specified groupBy Function.
public static <T, K, V, R extends MutableMultimap<K, V>> Collector<T, ?, R>	groupByAndCollect(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction, Supplier<R> supplier) Returns the elements as an MutableMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
private static <T, K, V, A extends MutableMultimap<K, V>, R extends ImmutableMultimap<K, V>> Collector<T, ?, R>	groupByAndCollectImmutable(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction, Supplier<A> supplier, Function<A, R> finisher)
public static <T, K, R extends MutableMultimap<K, T>> Collector<T, ?, R>	groupByEach(Function<? super T, ? extends Iterable<K>> groupBy, Supplier<R> supplier) Same as `groupBy(Function, Supplier)`, except the result of evaluating groupBy function will return a collection of keys for each value.
private static <T, K, A extends MutableMultimap<K, T>, R extends ImmutableMultimap<K, T>> Collector<T, ?, R>	groupByImmutable(Function<? super T, ? extends K> groupBy, Supplier<A> supplier, Function<A, R> finisher)
public static <T, K, R extends MutableMapIterable<K, T>> Collector<T, ?, R>	groupByUniqueKey(Function<? super T, ? extends K> groupBy, Supplier<R> supplier) Same as `groupBy(Function, Supplier)`, except the result of evaluating groupBy function should return a unique key, or else an exception is thrown.
public static <T> Collector<T, ?, String>	makeString() Returns a String composed of elements separated by ", ".
public static <T> Collector<T, ?, String>	makeString(CharSequence separator) Returns a String composed of elements separated by the specified separator.
public static <T> Collector<T, ?, String>	makeString(CharSequence start, CharSequence separator, CharSequence end) Returns a String composed of elements separated by the specified separator and beginning with start String and ending with end String.
private static <T, R extends Collection<T>> BinaryOperator<R>	mergeCollections()
private static <T, R extends PartitionMutableCollection<T>> BinaryOperator<R>	mergePartitions()
public static <T, R extends PartitionMutableCollection<T>> Collector<T, ?, R>	partition(Predicate<? super T> predicate, Supplier<R> supplier) Returns all elements of the stream split into a PartitionMutableCollection after evaluating the predicate.
public static <T, P, R extends PartitionMutableCollection<T>> Collector<T, ?, R>	partitionWith(Predicate2<? super T, ? super P> predicate, P parameter, Supplier<R> supplier) Returns all elements of the stream split into a PartitionMutableCollection after evaluating the predicate.
public static <T, R extends Collection<T>> Collector<T, ?, R>	reject(Predicate<? super T> predicate, Supplier<R> supplier) Returns all elements of the stream that return false when evaluating the predicate.
public static <T, P, R extends Collection<T>> Collector<T, ?, R>	rejectWith(Predicate2<? super T, ? super P> predicate, P parameter, Supplier<R> supplier) Returns all elements of the stream that return false when evaluating the predicate with the parameter.
public static <T, R extends Collection<T>> Collector<T, ?, R>	select(Predicate<? super T> predicate, Supplier<R> supplier) Returns all elements of the stream that return true when evaluating the predicate.
public static <T, P, R extends Collection<T>> Collector<T, ?, R>	selectWith(Predicate2<? super T, ? super P> predicate, P parameter, Supplier<R> supplier) Returns all elements of the stream that return true when evaluating the predicate with the parameter.
public static <T, V> Collector<T, ?, MutableMap<V, BigDecimal>>	sumByBigDecimal(Function<? super T, ? extends V> groupBy, Function<? super T, BigDecimal> function) Groups and sums the values using the two specified functions.
public static <T, V> Collector<T, ?, MutableMap<V, BigInteger>>	sumByBigInteger(Function<? super T, ? extends V> groupBy, Function<? super T, BigInteger> function) Groups and sums the values using the two specified functions.
public static <T, V> Collector<T, ?, MutableObjectDoubleMap<V>>	sumByDouble(Function<? super T, ? extends V> groupBy, DoubleFunction<? super T> function) Groups and sums the values using the two specified functions.
public static <T, V> Collector<T, ?, MutableObjectDoubleMap<V>>	sumByFloat(Function<? super T, ? extends V> groupBy, FloatFunction<? super T> function) Groups and sums the values using the two specified functions.
public static <T, V> Collector<T, ?, MutableObjectLongMap<V>>	sumByInt(Function<? super T, ? extends V> groupBy, IntFunction<? super T> function) Groups and sums the values using the two specified functions.
public static <T, V> Collector<T, ?, MutableObjectLongMap<V>>	sumByLong(Function<? super T, ? extends V> groupBy, LongFunction<? super T> function) Groups and sums the values using the two specified functions.
public static <T> Collector<T, ?, BigDecimalSummaryStatistics>	summarizingBigDecimal(Function<? super T, BigDecimal> function) Returns a BigDecimalSummaryStatistics applying the specified function to each element of the stream or collection.
public static <T> Collector<T, ?, BigIntegerSummaryStatistics>	summarizingBigInteger(Function<? super T, BigInteger> function) Returns a BigIntegerSummaryStatistics applying the specified function to each element of the stream or collection.
public static <T> Collector<T, ?, BigDecimal>	summingBigDecimal(Function<? super T, BigDecimal> function) Returns a BigDecimal sum applying the specified function to each element of the stream or collection.
public static <T> Collector<T, ?, BigInteger>	summingBigInteger(Function<? super T, BigInteger> function) Returns a BigInteger sum applying the specified function to each element of the stream or collection.
public static <T> Collector<T, ?, MutableBag<T>>	toBag() Returns the elements as a MutableBag.
public static <T, K> Collector<T, ?, MutableBagMultimap<K, T>>	toBagMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an MutableBagMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, MutableBagMultimap<K, V>>	toBagMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an MutableBagMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T, K, V> Collector<T, ?, MutableBiMap<K, V>>	toBiMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a MutableBiMap applying the keyFunction and valueFunction to each element.
public static <T> Collector<T, ?, ImmutableBag<T>>	toImmutableBag() Returns the elements as an ImmutableBag.
public static <T, K> Collector<T, ?, ImmutableBagMultimap<K, T>>	toImmutableBagMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an ImmutableBagMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, ImmutableBagMultimap<K, V>>	toImmutableBagMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an ImmutableBagMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T, K, V> Collector<T, ?, ImmutableBiMap<K, V>>	toImmutableBiMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as an ImmutableBiMap applying the keyFunction and valueFunction to each element.
public static <T> Collector<T, ?, ImmutableList<T>>	toImmutableList() Returns the elements as an ImmutableList.
public static <T, K> Collector<T, ?, ImmutableListMultimap<K, T>>	toImmutableListMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an ImmutableListMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, ImmutableListMultimap<K, V>>	toImmutableListMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an ImmutableListMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T, K, V> Collector<T, ?, ImmutableMap<K, V>>	toImmutableMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as an ImmutableMap applying the keyFunction and valueFunction to each element.
public static <T> Collector<T, ?, ImmutableSet<T>>	toImmutableSet() Returns the elements as an ImmutableSet.
public static <T, K> Collector<T, ?, ImmutableSetMultimap<K, T>>	toImmutableSetMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an ImmutableSetMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, ImmutableSetMultimap<K, V>>	toImmutableSetMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an ImmutableSetMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T> Collector<T, ?, ImmutableSortedBag<T>>	toImmutableSortedBag() Returns the elements as an ImmutableSortedBag.
public static <T> Collector<T, ?, ImmutableSortedBag<T>>	toImmutableSortedBag(Comparator<? super T> comparator) Returns the elements as an ImmutableSortedBag using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, ImmutableSortedBag<T>>	toImmutableSortedBagBy(Function<? super T, ? extends V> function) Returns the elements as a ImmutableSortedBag using the specified function.
public static <T> Collector<T, ?, ImmutableList<T>>	toImmutableSortedList() Returns the elements as an ImmutableList that has been sorted.
public static <T> Collector<T, ?, ImmutableList<T>>	toImmutableSortedList(Comparator<? super T> comparator) Returns the elements as an ImmutableList that has been sorted using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, ImmutableList<T>>	toImmutableSortedListBy(Function<? super T, ? extends V> function) Returns the elements as a ImmutableList that has been sorted using the specified comparator.
public static <T, K, V> Collector<T, ?, ImmutableSortedMap<K, V>>	toImmutableSortedMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a ImmutableSortedMap that has been sorted after applying the keyFunction and valueFunction to each element.
public static <T, K, V> Collector<T, ?, ImmutableSortedMap<K, V>>	toImmutableSortedMap(Comparator<? super K> comparator, Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a ImmutableSortedMap that has been sorted using the specified comparator after applying the keyFunction and valueFunction to each element.
public static <T, KK extends Comparable<? super KK>, K, V> Collector<T, ?, ImmutableSortedMap<K, V>>	toImmutableSortedMapBy(Function<? super K, KK> sortBy, Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a ImmutableSortedMap that has been sorted using the specified comparator.
public static <T> Collector<T, ?, ImmutableSortedSet<T>>	toImmutableSortedSet() Returns the elements as an ImmutableSortedSet.
public static <T> Collector<T, ?, ImmutableSortedSet<T>>	toImmutableSortedSet(Comparator<? super T> comparator) Returns the elements as an ImmutableSortedSet using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, ImmutableSortedSet<T>>	toImmutableSortedSetBy(Function<? super T, ? extends V> function) Returns the elements as a ImmutableSortedSet using the specified function to compare each element.
public static <T> Collector<T, ?, ImmutableStack<T>>	toImmutableStack() Returns the elements as an ImmutableStack.
public static <T> Collector<T, ?, MutableList<T>>	toList() Returns the elements as a MutableList.
public static <T, K> Collector<T, ?, MutableListMultimap<K, T>>	toListMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an MutableListMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, MutableListMultimap<K, V>>	toListMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an MutableListMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T, K, V> Collector<T, ?, MutableMap<K, V>>	toMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a MutableMap applying the keyFunction and valueFunction to each element.
public static <T> Collector<T, ?, MutableSet<T>>	toSet() Returns the elements as a MutableSet.
public static <T, K> Collector<T, ?, MutableSetMultimap<K, T>>	toSetMultimap(Function<? super T, ? extends K> groupBy) Returns the elements as an MutableSetMultimap grouping each element using the specified groupBy Function.
public static <T, K, V> Collector<T, ?, MutableSetMultimap<K, V>>	toSetMultimap(Function<? super T, ? extends K> groupBy, Function<? super T, ? extends V> valueFunction) Returns the elements as an MutableSetMultimap grouping each element using the specified groupBy Function and converting each element to the value returned by applying the specified Function valueFunction.
public static <T> Collector<T, ?, MutableSortedBag<T>>	toSortedBag() Returns the elements as a MutableSortedBag.
public static <T> Collector<T, ?, MutableSortedBag<T>>	toSortedBag(Comparator<? super T> comparator) Returns the elements as a MutableSortedBag using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, MutableSortedBag<T>>	toSortedBagBy(Function<? super T, ? extends V> function) Returns the elements as a MutableSortedBag using the specified function.
public static <T> Collector<T, ?, MutableList<T>>	toSortedList() Returns the elements as a MutableList that has been sorted.
public static <T> Collector<T, ?, MutableList<T>>	toSortedList(Comparator<? super T> comparator) Returns the elements as a MutableList that has been sorted using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, MutableList<T>>	toSortedListBy(Function<? super T, ? extends V> function) Returns the elements as a MutableList that has been sorted using the specified comparator.
public static <T, K, V> Collector<T, ?, MutableSortedMap<K, V>>	toSortedMap(Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a MutableSortedMap that has been sorted after applying the keyFunction and valueFunction to each element.
public static <T, K, V> Collector<T, ?, MutableSortedMap<K, V>>	toSortedMap(Comparator<? super K> comparator, Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a MutableSortedMap that has been sorted using the specified comparator after applying the keyFunction and valueFunction to each element.
public static <T, KK extends Comparable<? super KK>, K, V> Collector<T, ?, MutableSortedMap<K, V>>	toSortedMapBy(Function<? super K, KK> sortBy, Function<? super T, ? extends K> keyFunction, Function<? super T, ? extends V> valueFunction) Returns the elements as a MutableSortedMap that has been sorted using the specified comparator after applying the keyFunction and valueFunction to each element.
public static <T> Collector<T, ?, MutableSortedSet<T>>	toSortedSet() Returns the elements as a MutableSortedSet.
public static <T> Collector<T, ?, MutableSortedSet<T>>	toSortedSet(Comparator<? super T> comparator) Returns the elements as a MutableSortedSet using the specified comparator.
public static <T, V extends Comparable<? super V>> Collector<T, ?, MutableSortedSet<T>>	toSortedSetBy(Function<? super T, ? extends V> function) Returns the elements as a MutableSortedSet using the specified function to compare each element.
public static <T> Collector<T, ?, MutableStack<T>>	toStack() Returns the elements as a MutableStack.
public static <T, S> Collector<T, ?, MutableList<Pair<T, S>>>	zip(Iterable<S> other) Returns a `MutableList` formed from this stream of elements and another `Iterable` by combining corresponding elements in pairs.
public static <T> Collector<T, ?, MutableList<ObjectIntPair<T>>>	zipWithIndex() Returns a `MutableList` of pairs formed from this stream of elements its indices.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

public final Class Collectors2

Field Summary

Constructor Summary

Method Summary