@GwtCompatible(serializable=true, emulated=true) public abstract class ImmutableMultiset<E> extends ImmutableCollection<E> implements Multiset<E>
Multiset whose contents will never change, with many other important properties
detailed at ImmutableCollection.
Grouped iteration. In all current implementations, duplicate elements always appear consecutively when iterating. Elements iterate in order by the first appearance of that element when the multiset was created.
See the Guava User Guide article on immutable collections.
| Modifier and Type | Class and Description |
|---|---|
static class |
ImmutableMultiset.Builder<E>
A builder for creating immutable multiset instances, especially
public static final multisets ("constant multisets"). |
Multiset.Entry<E>| Modifier and Type | Method and Description |
|---|---|
int |
add(E element,
int occurrences)
Deprecated.
Unsupported operation.
|
ImmutableList<E> |
asList()
Returns an
ImmutableList containing the same elements, in the same order, as this
collection. |
static <E> ImmutableMultiset.Builder<E> |
builder()
Returns a new builder.
|
boolean |
contains(Object object)
Determines whether this multiset contains the specified element.
|
static <E> ImmutableMultiset<E> |
copyOf(E[] elements)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
static <E> ImmutableMultiset<E> |
copyOf(Iterable<? extends E> elements)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
static <E> ImmutableMultiset<E> |
copyOf(Iterator<? extends E> elements)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
abstract ImmutableSet<E> |
elementSet()
Returns the set of distinct elements contained in this multiset.
|
ImmutableSet<Multiset.Entry<E>> |
entrySet()
Returns a view of the contents of this multiset, grouped into
Multiset.Entry instances, each providing an element of the multiset and
the count of that element. |
boolean |
equals(Object object)
Compares the specified object with this multiset for equality.
|
int |
hashCode()
Returns the hash code for this multiset.
|
UnmodifiableIterator<E> |
iterator()
Returns an unmodifiable iterator across the elements in this collection.
|
static <E> ImmutableMultiset<E> |
of()
Returns the empty immutable multiset.
|
static <E> ImmutableMultiset<E> |
of(E element)
Returns an immutable multiset containing a single element.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2)
Returns an immutable multiset containing the given elements, in order.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3,
E e4)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3,
E e4,
E e5)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3,
E e4,
E e5,
E e6,
E... others)
Returns an immutable multiset containing the given elements, in the "grouped iteration order"
described in the class documentation.
|
int |
remove(Object element,
int occurrences)
Deprecated.
Unsupported operation.
|
int |
setCount(E element,
int count)
Deprecated.
Unsupported operation.
|
boolean |
setCount(E element,
int oldCount,
int newCount)
Deprecated.
Unsupported operation.
|
String |
toString() |
add, addAll, clear, remove, removeAll, retainAll, toArray, toArraycontainsAll, isEmpty, sizeclone, finalize, getClass, notify, notifyAll, wait, wait, waitadd, containsAll, count, remove, removeAll, retainAll, sizeaddAll, clear, isEmpty, parallelStream, removeIf, spliterator, stream, toArray, toArraypublic static <E> ImmutableMultiset<E> of()
public static <E> ImmutableMultiset<E> of(E element)
NullPointerException - if element is nullpublic static <E> ImmutableMultiset<E> of(E e1, E e2)
NullPointerException - if any element is nullpublic static <E> ImmutableMultiset<E> of(E e1, E e2, E e3)
NullPointerException - if any element is nullpublic static <E> ImmutableMultiset<E> of(E e1, E e2, E e3, E e4)
NullPointerException - if any element is nullpublic static <E> ImmutableMultiset<E> of(E e1, E e2, E e3, E e4, E e5)
NullPointerException - if any element is nullpublic static <E> ImmutableMultiset<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E... others)
NullPointerException - if any element is nullpublic static <E> ImmutableMultiset<E> copyOf(E[] elements)
NullPointerException - if any of elements is nullpublic static <E> ImmutableMultiset<E> copyOf(Iterable<? extends E> elements)
NullPointerException - if any of elements is nullpublic static <E> ImmutableMultiset<E> copyOf(Iterator<? extends E> elements)
NullPointerException - if any of elements is nullpublic UnmodifiableIterator<E> iterator()
ImmutableCollectionpublic ImmutableList<E> asList()
ImmutableCollectionImmutableList containing the same elements, in the same order, as this
collection.
Performance note: in most cases this method can return quickly without actually copying anything. The exact circumstances under which the copy is performed are undefined and subject to change.
asList in class ImmutableCollection<E>public boolean contains(@Nullable Object object)
MultisetThis method refines Collection.contains(java.lang.Object) to further specify that
it may not throw an exception in response to element being
null or of the wrong type.
contains in interface Multiset<E>contains in interface Collection<E>contains in class ImmutableCollection<E>object - the element to check fortrue if this multiset contains at least one occurrence of
the element@Deprecated public final int add(E element, int occurrences)
add in interface Multiset<E>element - the element to add occurrences of; may be null only if
explicitly allowed by the implementationoccurrences - the number of occurrences of the element to add. May be
zero, in which case no change will be made.UnsupportedOperationException - always@Deprecated public final int remove(Object element, int occurrences)
remove in interface Multiset<E>element - the element to conditionally remove occurrences ofoccurrences - the number of occurrences of the element to remove. May be zero, in which
case no change will be made.UnsupportedOperationException - always@Deprecated public final int setCount(E element, int count)
setCount in interface Multiset<E>element - the element to add or remove occurrences of; may be null
only if explicitly allowed by the implementationcount - the desired count of the element in this multisetUnsupportedOperationException - always@Deprecated public final boolean setCount(E element, int oldCount, int newCount)
setCount in interface Multiset<E>element - the element to conditionally set the count of; may be null
only if explicitly allowed by the implementationoldCount - the expected present count of the element in this multisetnewCount - the desired count of the element in this multisettrue if the condition for modification was met. This
implies that the multiset was indeed modified, unless
oldCount == newCount.UnsupportedOperationException - alwayspublic boolean equals(@Nullable Object object)
Multisettrue if the given object is also a multiset and contains equal
elements with equal counts, regardless of order.public int hashCode()
Multiset
((element == null) ? 0 : element.hashCode()) ^ count(element)
over all distinct elements in the multiset. It follows that a multiset and its entry set always have the same hash code.
public String toString()
MultisetIt is recommended, though not mandatory, that this method return the
result of invoking Multiset.toString() on the Multiset.entrySet(), yielding a
result such as [a x 3, c, d x 2, e].
public abstract ImmutableSet<E> elementSet()
MultisetIf the element set supports any removal operations, these necessarily cause all occurrences of the removed element(s) to be removed from the multiset. Implementations are not expected to support the add operations, although this is possible.
A common use for the element set is to find the number of distinct
elements in the multiset: elementSet().size().
elementSet in interface Multiset<E>Set since 2.0)public ImmutableSet<Multiset.Entry<E>> entrySet()
MultisetMultiset.Entry instances, each providing an element of the multiset and
the count of that element. This set contains exactly one entry for each
distinct element in the multiset (thus it always has the same size as the
Multiset.elementSet()). The order of the elements in the element set is
unspecified.
The entry set is backed by the same data as the multiset, so any change
to either is immediately reflected in the other. However, multiset changes
may or may not be reflected in any Entry instances already
retrieved from the entry set (this is implementation-dependent).
Furthermore, implementations are not required to support modifications to
the entry set at all, and the Entry instances themselves don't
even have methods for modification. See the specific implementation class
for more details on how its entry set handles modifications.
public static <E> ImmutableMultiset.Builder<E> builder()
ImmutableMultiset.Builder constructor.Copyright © 2010–2017. All rights reserved.