@GwtCompatible(serializable=true, emulated=true) public abstract class ImmutableMultiset<E> extends ImmutableCollection<E> implements Multiset<E>
Its iterator orders elements according to the first appearance of the element among the items passed to the factory method or builder. When the multiset contains multiple instances of an element, those instances are consecutive in the iteration order.
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.
|
static <E> ImmutableMultiset.Builder<E> |
builder()
Returns a new builder.
|
boolean |
contains(Object object)
Returns true if this collection contains the specified element.
|
boolean |
containsAll(Collection<?> targets)
Returns true if this collection contains all of the elements
in the specified collection.
|
static <E> ImmutableMultiset<E> |
copyOf(E[] elements)
Returns an immutable multiset containing the given elements.
|
static <E> ImmutableMultiset<E> |
copyOf(Iterable<? extends E> elements)
Returns an immutable multiset containing the given elements.
|
static <E> ImmutableMultiset<E> |
copyOf(Iterator<? extends E> elements)
Returns an immutable multiset containing the given elements.
|
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)
Indicates whether some other object is "equal to" this one.
|
int |
hashCode()
Returns a hash code value for the object.
|
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 order.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3,
E e4)
Returns an immutable multiset containing the given elements, in order.
|
static <E> ImmutableMultiset<E> |
of(E e1,
E e2,
E e3,
E e4,
E e5)
Returns an immutable multiset containing the given elements, in order.
|
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 order.
|
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()
Returns a string representation of this collection.
|
add, addAll, asList, clear, remove, removeAll, retainAll, toArray, toArrayisEmpty, sizeclone, finalize, getClass, notify, notifyAll, wait, wait, waitpublic 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)
The multiset is ordered by the first occurrence of each element. For
example, ImmutableMultiset.copyOf([2, 3, 1, 3]) yields a multiset
with elements in the order 2, 3, 3, 1.
NullPointerException - if any of elements is nullpublic static <E> ImmutableMultiset<E> copyOf(Iterable<? extends E> elements)
The multiset is ordered by the first occurrence of each element. For
example, ImmutableMultiset.copyOf(Arrays.asList(2, 3, 1, 3)) yields
a multiset with elements in the order 2, 3, 3, 1.
Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.
Note: Despite what the method name suggests, if elements
is an ImmutableMultiset, no copy will actually be performed, and
the given multiset itself will be returned.
NullPointerException - if any of elements is nullpublic static <E> ImmutableMultiset<E> copyOf(Iterator<? extends E> elements)
The multiset is ordered by the first occurrence of each element. For
example,
ImmutableMultiset.copyOf(Arrays.asList(2, 3, 1, 3).iterator())
yields a multiset with elements in the order 2, 3, 3, 1.
NullPointerException - if any of elements is nullpublic UnmodifiableIterator<E> iterator()
ImmutableCollectionpublic boolean contains(@Nullable Object object)
java.util.AbstractCollectionThis implementation iterates over the elements in the collection, checking each element in turn for equality with the specified element.
contains in interface Multiset<E>contains in interface Collection<E>contains in class ImmutableCollection<E>object - element whose presence in this collection is to be testedpublic boolean containsAll(Collection<?> targets)
java.util.AbstractCollectionThis implementation iterates over the specified collection, checking each element returned by the iterator in turn to see if it's contained in this collection. If all elements are so contained true is returned, otherwise false.
containsAll in interface Multiset<E>containsAll in interface Collection<E>containsAll in class AbstractCollection<E>targets - collection to be checked for containment in this collectionAbstractCollection.contains(Object)@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)
java.lang.Object
The equals method implements an equivalence relation
on non-null object references:
x, x.equals(x) should return
true.
x and y, x.equals(y)
should return true if and only if
y.equals(x) returns true.
x, y, and z, if
x.equals(y) returns true and
y.equals(z) returns true, then
x.equals(z) should return true.
x and y, multiple invocations of
x.equals(y) consistently return true
or consistently return false, provided no
information used in equals comparisons on the
objects is modified.
x,
x.equals(null) should return false.
The equals method for class Object implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x and
y, this method returns true if and only
if x and y refer to the same object
(x == y has the value true).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode method, which states
that equal objects must have equal hash codes.
equals in interface Multiset<E>equals in interface Collection<E>equals in class Objectobject - the reference object with which to compare.true if this object is the same as the obj
argument; false otherwise.Object.hashCode(),
HashMappublic int hashCode()
java.lang.ObjectHashMap.
The general contract of hashCode is:
hashCode method
must consistently return the same integer, provided no information
used in equals comparisons on the object is modified.
This integer need not remain consistent from one execution of an
application to another execution of the same application.
equals(Object)
method, then calling the hashCode method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
method, then calling the hashCode method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by
class Object does return distinct integers for distinct
objects. (This is typically implemented by converting the internal
address of the object into an integer, but this implementation
technique is not required by the
JavaTM programming language.)
hashCode in interface Multiset<E>hashCode in interface Collection<E>hashCode in class ObjectObject.equals(java.lang.Object),
System.identityHashCode(java.lang.Object)public String toString()
java.util.AbstractCollectionString.valueOf(Object).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 © 2010-2013. All Rights Reserved.