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/*
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.xenoamess.commons.primitive.collections;
import com.xenoamess.commons.primitive.Primitive;
import com.xenoamess.commons.primitive.functions.CharPredicate;
import com.xenoamess.commons.primitive.iterators.CharIterator;
import com.xenoamess.commons.primitive.iterators.CharSpliterator;
import com.xenoamess.commons.primitive.iterators.CharSpliterators;
import java.util.*;
import java.util.function.IntFunction;
import java.util.function.Predicate;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
/**
* The root interface in the collection hierarchy. A collection
* represents a group of objects, known as its elements. Some
* collections allow duplicate elements and others do not. Some are ordered
* and others unordered. The JDK does not provide any direct
* implementations of this interface: it provides implementations of more
* specific subinterfaces like {@code Set} and {@code List}. This interface
* is typically used to pass collections around and manipulate them where
* maximum generality is desired.
*
* Bags or multisets (unordered collections that may contain
* duplicate elements) should implement this interface directly.
*
*
All general-purpose {@code Collection} implementation classes (which
* typically implement {@code Collection} indirectly through one of its
* subinterfaces) should provide two "standard" constructors: a void (no
* arguments) constructor, which creates an empty collection, and a
* constructor with a single argument of type {@code Collection}, which
* creates a new collection with the same elements as its argument. In
* effect, the latter constructor allows the user to copy any collection,
* producing an equivalent collection of the desired implementation type.
* There is no way to enforce this convention (as interfaces cannot contain
* constructors) but all of the general-purpose {@code Collection}
* implementations in the Java platform libraries comply.
*
*
Certain methods are specified to be
* optional. If a collection implementation doesn't implement a
* particular operation, it should define the corresponding method to throw
* {@code UnsupportedOperationException}. Such methods are marked "optional
* operation" in method specifications of the collections interfaces.
*
*
Some collection implementations
* have restrictions on the elements that they may contain.
* For example, some implementations prohibit null elements,
* and some have restrictions on the types of their elements. Attempting to
* add an ineligible element throws an unchecked exception, typically
* {@code NullPointerException} or {@code ClassCastException}. Attempting
* to query the presence of an ineligible element may throw an exception,
* or it may simply return false; some implementations will exhibit the former
* behavior and some will exhibit the latter. More generally, attempting an
* operation on an ineligible element whose completion would not result in
* the insertion of an ineligible element into the collection may throw an
* exception or it may succeed, at the option of the implementation.
* Such exceptions are marked as "optional" in the specification for this
* interface.
*
*
It is up to each collection to determine its own synchronization
* policy. In the absence of a stronger guarantee by the
* implementation, undefined behavior may result from the invocation
* of any method on a collection that is being mutated by another
* thread; this includes direct invocations, passing the collection to
* a method that might perform invocations, and using an existing
* iterator to examine the collection.
*
*
Many methods in Collections Framework interfaces are defined in
* terms of the {@link java.lang.Object#equals(Object) equals} method. For example,
* the specification for the {@link #contains(Object) contains(Object o)}
* method says: "returns {@code true} if and only if this collection
* contains at least one element {@code e} such that
* {@code (o==null ? e==null : o.equals(e))}." This specification should
* not be construed to imply that invoking {@code Collection.contains}
* with a non-null argument {@code o} will cause {@code o.equals(e)} to be
* invoked for any element {@code e}. Implementations are free to implement
* optimizations whereby the {@code equals} invocation is avoided, for
* example, by first comparing the hash codes of the two elements. (The
* {@link java.lang.Object#hashCode()} specification guarantees that two objects with
* unequal hash codes cannot be equal.) More generally, implementations of
* the various Collections Framework interfaces are free to take advantage of
* the specified behavior of underlying {@link java.lang.Object} methods wherever the
* implementor deems it appropriate.
*
*
Some collection operations which perform recursive traversal of the
* collection may fail with an exception for self-referential instances where
* the collection directly or indirectly contains itself. This includes the
* {@code clone()}, {@code equals()}, {@code hashCode()} and {@code toString()}
* methods. Implementations may optionally handle the self-referential scenario,
* however most current implementations do not do so.
*
*
View Collections
*
* Most collections manage storage for elements they contain. By contrast, view
* collections themselves do not store elements, but instead they rely on a
* backing collection to store the actual elements. Operations that are not handled
* by the view collection itself are delegated to the backing collection. Examples of
* view collections include the wrapper collections returned by methods such as
* {@link java.util.Collections#checkedCollection Collections.checkedCollection},
* and {@link java.util.Collections#unmodifiableCollection Collections.unmodifiableCollection}.
* Other examples of view collections include collections that provide a
* different representation of the same elements, for example, as
* provided by {@link java.util.List#subList List.subList},
* {@link java.util.NavigableSet#subSet NavigableSet.subSet}, or
* {@link java.util.Map#entrySet Map.entrySet}.
* Any changes made to the backing collection are visible in the view collection.
* Correspondingly, any changes made to the view collection — if changes
* are permitted — are written through to the backing collection.
* Although they technically aren't collections, instances of
* {@link java.util.Iterator} and {@link java.util.ListIterator} can also allow modifications
* to be written through to the backing collection, and in some cases,
* modifications to the backing collection will be visible to the Iterator
* during iteration.
*
*
Unmodifiable Collections
*
* Certain methods of this interface are considered "destructive" and are called
* "mutator" methods in that they modify the group of objects contained within
* the collection on which they operate. They can be specified to throw
* {@code UnsupportedOperationException} if this collection implementation
* does not support the operation. Such methods should (but are not required
* to) throw an {@code UnsupportedOperationException} if the invocation would
* have no effect on the collection. For example, consider a collection that
* does not support the {@link #add add} operation. What will happen if the
* {@link #addAll addAll} method is invoked on this collection, with an empty
* collection as the argument? The addition of zero elements has no effect,
* so it is permissible for this collection simply to do nothing and not to throw
* an exception. However, it is recommended that such cases throw an exception
* unconditionally, as throwing only in certain cases can lead to
* programming errors.
*
*
An unmodifiable collection is a collection, all of whose
* mutator methods (as defined above) are specified to throw
* {@code UnsupportedOperationException}. Such a collection thus cannot be
* modified by calling any methods on it. For a collection to be properly
* unmodifiable, any view collections derived from it must also be unmodifiable.
* For example, if a List is unmodifiable, the List returned by
* {@link java.util.List#subList List.subList} is also unmodifiable.
*
*
An unmodifiable collection is not necessarily immutable. If the
* contained elements are mutable, the entire collection is clearly
* mutable, even though it might be unmodifiable. For example, consider
* two unmodifiable lists containing mutable elements. The result of calling
* {@code list1.equals(list2)} might differ from one call to the next if
* the elements had been mutated, even though both lists are unmodifiable.
* However, if an unmodifiable collection contains all immutable elements,
* it can be considered effectively immutable.
*
*
Unmodifiable View Collections
*
* An unmodifiable view collection is a collection that is unmodifiable
* and that is also a view onto a backing collection. Its mutator methods throw
* {@code UnsupportedOperationException}, as described above, while
* reading and querying methods are delegated to the backing collection.
* The effect is to provide read-only access to the backing collection.
* This is useful for a component to provide users with read access to
* an internal collection, while preventing them from modifying such
* collections unexpectedly. Examples of unmodifiable view collections
* are those returned by the
* {@link java.util.Collections#unmodifiableCollection Collections.unmodifiableCollection},
* {@link java.util.Collections#unmodifiableList Collections.unmodifiableList}, and
* related methods.
*
*
Note that changes to the backing collection might still be possible,
* and if they occur, they are visible through the unmodifiable view. Thus,
* an unmodifiable view collection is not necessarily immutable. However,
* if the backing collection of an unmodifiable view is effectively immutable,
* or if the only reference to the backing collection is through an
* unmodifiable view, the view can be considered effectively immutable.
*
*
This interface is a member of the
*
* Java Collections Framework.
*
* @author Josh Bloch
* @author Neal Gafter
* @author XenoAmess
* @version 0.8.0
* @implSpec The default method implementations (inherited or otherwise) do not apply any
* synchronization protocol. If a {@code Collection} implementation has a
* specific synchronization protocol, then it must override default
* implementations to apply that protocol.
* @see Set
* @see List
* @see Map
* @see SortedSet
* @see SortedMap
* @see HashSet
* @see TreeSet
* @see ArrayList
* @see LinkedList
* @see Vector
* @see Collections
* @see Arrays
* @see AbstractCollection
* @see Collection
* @since 1.2
*/
public interface CharCollection extends Collection, CharIterable, Primitive {
// Query Operations
/**
* {@inheritDoc}
*
* Returns {@code true} if this list contains the specified element.
* More formally, returns {@code true} if and only if this list contains
* at least one element {@code e} such that
* {@code Objects.equals(o, e)}.
*/
@Override
default boolean contains(Object o) {
if (o == null) {
return false;
}
if (!(o instanceof Character)) {
return false;
}
return this.containsPrimitive((Character) o);
}
/**
* Primitive replacement of contains(Object o)
*
* @param o element whose presence in this list is to be tested
* @return {@code true} if this list contains the specified element
* @throws java.lang.ClassCastException if the type of the specified element
* is incompatible with this list
* (optional)
* @throws java.lang.NullPointerException if the specified element is null and this
* list does not permit null elements
* (optional)
* @see #contains(Object o)
*/
default boolean contains(char o) {
return this.containsPrimitive(o);
}
/**
* Primitive replacement of contains(Object o)
*
* @param o element whose presence in this list is to be tested
* @return {@code true} if this list contains the specified element
* @throws java.lang.ClassCastException if the type of the specified element
* is incompatible with this list
* (optional)
* @throws java.lang.NullPointerException if the specified element is null and this
* list does not permit null elements
* (optional)
* @see #contains(Object o)
*/
boolean containsPrimitive(char o);
/**
* {@inheritDoc}
*
* Returns an iterator over the elements in this collection. There are no
* guarantees concerning the order in which the elements are returned
* (unless this collection is an instance of some class that provides a
* guarantee).
*/
@Override
CharIterator iterator();
/**
* Returns an char array containing all of the elements in this char collection.
* If this char collection makes any guarantees as to what order its elements
* are returned by its iterator, this method must return the elements in
* the same order. The returned array's {@linkplain Class#getComponentType
* runtime component type} is {@code char}.
*
*
The returned array will be "safe" in that no references to it are
* maintained by this collection. (In other words, this method must
* allocate a new array even if this collection is backed by an array).
* The caller is thus free to modify the returned array.
*
* @return an array, whose {@linkplain Class#getComponentType runtime component
* type} is {@code Object}, containing all of the elements in this collection
* @apiNote This method acts as a bridge between array-based and collection-based APIs.
* It returns an array whose runtime type is {@code Object[]}.
* Use {@link #toArray(Object[]) toArray(T[])} to reuse an existing
* array, or use {@link #toArray(IntFunction)} to control the runtime type
* of the array.
*/
char[] toArrayPrimitive();
/**
* Returns an array containing all of the elements in this char collection;
* the runtime type of the returned array is that of the specified array.
* If the char collection fits in the specified array, it is returned therein.
* Otherwise, a new array is allocated with the runtime type of the
* specified array and the size of this char collection.
*
*
If this collection fits in the specified array with room to spare
* (i.e., the array has more elements than this collection), the element
* in the array immediately following the end of the collection is set to
* {@code null}. (This is useful in determining the length of this
* collection only if the caller knows that this collection does
* not contain any {@code null} elements.)
*
*
If this char collection makes any guarantees as to what order its elements
* are returned by its iterator, this method must return the elements in
* the same order.
*
* @param a the array into which the elements of this collection are to be
* stored, if it is big enough; otherwise, a new array of the same
* runtime type is allocated for this purpose.
* @return an array containing all of the elements in this collection
* @throws ArrayStoreException if the runtime type of any element in this
* collection is not assignable to the {@linkplain Class#getComponentType
* runtime component type} of the specified array
* @throws NullPointerException if the specified array is null
* @apiNote This method acts as a bridge between array-based and collection-based APIs.
* It allows an existing array to be reused under certain circumstances.
* Use {@link #toArrayPrimitive()} to create an array whose runtime type is {@code char[]},
* or use {@link #toArray(IntFunction)} to control the runtime type of
* the array.
*
*
Suppose {@code x} is a char collection.
* The following code can be used to dump the collection into a previously
* allocated {@code char} array:
*
*
* String[] y = new String[SIZE];
* ...
* y = x.toArray(y);
*
* The return value is reassigned to the variable {@code y}, because a
* new array will be allocated and returned if the collection {@code x} has
* too many elements to fit into the existing array {@code y}.
*
*
Note that {@code toArray(new Object[0])} is identical in function to
* {@code toArray()}.
*/
default char[] toArray(char[] a) {
return toArrayPrimitive(a);
}
/**
* Returns an array containing all of the elements in this char collection;
* the runtime type of the returned array is that of the specified array.
* If the char collection fits in the specified array, it is returned therein.
* Otherwise, a new array is allocated with the runtime type of the
* specified array and the size of this char collection.
*
*
If this collection fits in the specified array with room to spare
* (i.e., the array has more elements than this collection), the element
* in the array immediately following the end of the collection is set to
* {@code null}. (This is useful in determining the length of this
* collection only if the caller knows that this collection does
* not contain any {@code null} elements.)
*
*
If this char collection makes any guarantees as to what order its elements
* are returned by its iterator, this method must return the elements in
* the same order.
*
* @param a the array into which the elements of this collection are to be
* stored, if it is big enough; otherwise, a new array of the same
* runtime type is allocated for this purpose.
* @return an array containing all of the elements in this collection
* @throws ArrayStoreException if the runtime type of any element in this
* collection is not assignable to the {@linkplain Class#getComponentType
* runtime component type} of the specified array
* @throws NullPointerException if the specified array is null
* @apiNote This method acts as a bridge between array-based and collection-based APIs.
* It allows an existing array to be reused under certain circumstances.
* Use {@link #toArrayPrimitive()} to create an array whose runtime type is {@code char[]},
* or use {@link #toArray(IntFunction)} to control the runtime type of
* the array.
*
*
Suppose {@code x} is a char collection.
* The following code can be used to dump the collection into a previously
* allocated {@code char} array:
*
*
* String[] y = new String[SIZE];
* ...
* y = x.toArray(y);
*
* The return value is reassigned to the variable {@code y}, because a
* new array will be allocated and returned if the collection {@code x} has
* too many elements to fit into the existing array {@code y}.
*
*
Note that {@code toArray(new Object[0])} is identical in function to
* {@code toArray()}.
*/
char[] toArrayPrimitive(char[] a);
/**
* {@inheritDoc}
*
* Returns an array containing all of the elements in this collection,
* using the provided {@code generator} function to allocate the returned array.
*
*
If this collection makes any guarantees as to what order its elements
* are returned by its iterator, this method must return the elements in
* the same order.
*
* @apiNote This method acts as a bridge between array-based and collection-based APIs.
* It allows creation of an array of a particular runtime type. Use
* {@link #toArray()} to create an array whose runtime type is {@code Object[]},
* or use {@link #toArray(Object[]) toArray(T[])} to reuse an existing array.
*
*
Suppose {@code x} is a collection known to contain only strings.
* The following code can be used to dump the collection into a newly
* allocated array of {@code String}:
*
*
* String[] y = x.toArray(String[]::new);
* @implSpec The default implementation calls the generator function with zero
* and then passes the resulting array to {@link #toArray(Object[]) toArray(T[])}.
* @since 11
*/
default T[] toArray(IntFunction generator) {
return toArray(generator.apply(0));
}
/**
* {@inheritDoc}
*
* Returns an array containing all of the elements in this char collection,
* using the provided {@code generator} function to allocate the returned array.
*
*
If this char collection makes any guarantees as to what order its elements
* are returned by its iterator, this method must return the elements in
* the same order.
*
* @apiNote This method acts as a bridge between array-based and collection-based APIs.
* It allows creation of an array of a particular runtime type. Use
* {@link #toArrayPrimitive()} to create an array whose runtime type is {@code char[]},
* or use {@link #toArrayPrimitive(char[])} to reuse an existing array.
*
*
Suppose {@code x} is a collection known to contain only strings.
* The following code can be used to dump the collection into a newly
* allocated array of {@code char}:
*
*
* char[] y = x.toArrayPrimitive(char[]::new);
* @implSpec The default implementation calls the generator function with zero
* and then passes the resulting array to {@link #toArrayPrimitive(char[])}.
* @since 11
*/
default char[] toArrayPrimitive(IntFunction generator) {
return toArrayPrimitive(generator.apply(0));
}
// Modification Operations
/**
* {@inheritDoc}
*
* Ensures that this collection contains the specified element (optional
* operation). Returns {@code true} if this collection changed as a
* result of the call. (Returns {@code false} if this collection does
* not permit duplicates and already contains the specified element.)
*
* Collections that support this operation may place limitations on what
* elements may be added to this collection. In particular, some
* collections will refuse to add {@code null} elements, and others will
* impose restrictions on the type of elements that may be added.
* Collection classes should clearly specify in their documentation any
* restrictions on what elements may be added.
*
* If a collection refuses to add a particular element for any reason
* other than that it already contains the element, it must throw
* an exception (rather than returning {@code false}). This preserves
* the invariant that a collection always contains the specified element
* after this call returns.
*/
@Override
default boolean add(Character e) {
return addPrimitive(e);
}
/**
* Primitive replacement of add(Character e)
*
* @param e element whose presence in this collection is to be ensured
* @return {@code true} if this collection changed as a result of the
* call
* @throws java.lang.UnsupportedOperationException if the {@code add} operation
* is not supported by this collection
* @throws java.lang.ClassCastException if the class of the specified element
* prevents it from being added to this collection
* @throws java.lang.NullPointerException if the specified element is null and this
* collection does not permit null elements
* @throws java.lang.IllegalArgumentException if some property of the element
* prevents it from being added to this collection
* @throws java.lang.IllegalStateException if the element cannot be added at this
* time due to insertion restrictions
* @see #add(Character e)
*/
default boolean add(char e) {
return addPrimitive(e);
}
/**
* Primitive replacement of add(Character e)
*
* @param e element whose presence in this collection is to be ensured
* @return {@code true} if this collection changed as a result of the
* call
* @throws java.lang.UnsupportedOperationException if the {@code add} operation
* is not supported by this collection
* @throws java.lang.ClassCastException if the class of the specified element
* prevents it from being added to this collection
* @throws java.lang.NullPointerException if the specified element is null and this
* collection does not permit null elements
* @throws java.lang.IllegalArgumentException if some property of the element
* prevents it from being added to this collection
* @throws java.lang.IllegalStateException if the element cannot be added at this
* time due to insertion restrictions
* @see #add(Character e)
*/
default boolean addPrimitive(char e) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
*
* Removes a single instance of the specified element from this
* collection, if it is present (optional operation). More formally,
* removes an element {@code e} such that
* {@code Objects.equals(o, e)}, if
* this collection contains one or more such elements. Returns
* {@code true} if this collection contained the specified element (or
* equivalently, if this collection changed as a result of the call).
*/
@Override
default boolean remove(Object o) {
if (o == null) {
return false;
}
if (!(o instanceof Character)) {
return false;
}
return removeByContentPrimitive((Character) o);
}
/**
* Primitive replacement of remove(Object o)
*
* @param o element to be removed from this collection, if present
* @return {@code true} if an element was removed as a result of this call
* @throws java.lang.ClassCastException if the type of the specified element
* is incompatible with this collection
* @throws java.lang.NullPointerException if the specified element is null and this
* collection does not permit null elements
* @throws java.lang.UnsupportedOperationException if the {@code remove} operation
* is not supported by this collection
* @see #remove(Object o)
*/
default boolean removeByContent(char o) {
return this.removeByContentPrimitive(o);
}
/**
* Primitive replacement of remove(Object o)
*
* @param o element to be removed from this collection, if present
* @return {@code true} if an element was removed as a result of this call
* @throws java.lang.ClassCastException if the type of the specified element
* is incompatible with this collection
* @throws java.lang.NullPointerException if the specified element is null and this
* collection does not permit null elements
* @throws java.lang.UnsupportedOperationException if the {@code remove} operation
* is not supported by this collection
* @see #remove(Object o)
*/
boolean removeByContentPrimitive(char o);
// Bulk Operations
/**
* {@inheritDoc}
*
* Removes all of the elements of this collection that satisfy the given
* predicate. Errors or runtime exceptions thrown during iteration or by
* the predicate are relayed to the caller.
*
* @implSpec The default implementation traverses all elements of the collection using
* its {@link #iterator}. Each matching element is removed using
* {@link java.util.Iterator#remove()}. If the collection's iterator does not
* support removal then an {@code UnsupportedOperationException} will be
* thrown on the first matching element.
* @since 1.8
*/
@Override
default boolean removeIf(Predicate filter) {
Objects.requireNonNull(filter);
boolean removed = false;
final CharIterator each = iterator();
if (filter instanceof CharPredicate) {
CharPredicate actionCharPredicate = (CharPredicate) filter;
while (each.hasNext()) {
if (actionCharPredicate.testPrimitive(each.nextPrimitive())) {
each.remove();
removed = true;
}
}
} else {
while (each.hasNext()) {
if (filter.test(each.next())) {
each.remove();
removed = true;
}
}
}
return removed;
}
// Comparison and hashing
/**
* {@inheritDoc}
*
* Creates a {@link Spliterator} over the elements in this collection.
*
* Implementations should document characteristic values reported by the
* spliterator. Such characteristic values are not required to be reported
* if the spliterator reports {@link Spliterator#SIZED} and this collection
* contains no elements.
*
*
The default implementation should be overridden by subclasses that
* can return a more efficient spliterator. In order to
* preserve expected laziness behavior for the {@link #stream()} and
* {@link #parallelStream()} methods, spliterators should either have the
* characteristic of {@code IMMUTABLE} or {@code CONCURRENT}, or be
* late-binding.
* If none of these is practical, the overriding class should describe the
* spliterator's documented policy of binding and structural interference,
* and should override the {@link #stream()} and {@link #parallelStream()}
* methods to create streams using a {@code Supplier} of the spliterator,
* as in:
*
{@code
* Stream s = StreamSupport.stream(() -> spliterator(), spliteratorCharacteristics)
* }
* These requirements ensure that streams produced by the
* {@link #stream()} and {@link #parallelStream()} methods will reflect the
* contents of the collection as of initiation of the terminal stream
* operation.
*
* @implSpec The default implementation creates a
* late-binding spliterator
* from the collection's {@code Iterator}. The spliterator inherits the
* fail-fast properties of the collection's iterator.
*
* The created {@code Spliterator} reports {@link java.util.Spliterator#SIZED}.
* @implNote The created {@code Spliterator} additionally reports
* {@link java.util.Spliterator#SUBSIZED}.
*
*
If a spliterator covers no elements then the reporting of additional
* characteristic values, beyond that of {@code SIZED} and {@code SUBSIZED},
* does not aid clients to control, specialize or simplify computation.
* However, this does enable shared use of an immutable and empty
* spliterator instance (see {@link java.util.Spliterators#emptySpliterator()}) for
* empty collections, and enables clients to determine if such a spliterator
* covers no elements.
* @since 1.8
*/
@Override
default CharSpliterator spliterator() {
return CharSpliterators.spliterator(this, 0);
}
/**
* {@inheritDoc}
*
* Returns a sequential {@code Stream} with this collection as its source.
*
*
This method should be overridden when the {@link #spliterator()}
* method cannot return a spliterator that is {@code IMMUTABLE},
* {@code CONCURRENT}, or late-binding. (See {@link #spliterator()}
* for details.)
*
* @implSpec The default implementation creates a sequential {@code Stream} from the
* collection's {@code Spliterator}.
* @since 1.8
*/
@Override
default Stream stream() {
return StreamSupport.stream(spliterator(), false);
}
/**
* {@inheritDoc}
*
* Returns a possibly parallel {@code Stream} with this collection as its
* source. It is allowable for this method to return a sequential stream.
*
*
This method should be overridden when the {@link #spliterator()}
* method cannot return a spliterator that is {@code IMMUTABLE},
* {@code CONCURRENT}, or late-binding. (See {@link #spliterator()}
* for details.)
*
* @implSpec The default implementation creates a parallel {@code Stream} from the
* collection's {@code Spliterator}.
* @since 1.8
*/
@Override
default Stream parallelStream() {
return StreamSupport.stream(spliterator(), true);
}
}