@Beta @GwtCompatible(emulated=true) public interface SortedMultiset<E>
Multiset
which maintains the ordering of its elements, according to
either their natural order or an explicit Comparator
. This order is
reflected when iterating over the sorted multiset, either directly, or through
its elementSet
or entrySet
views. In all cases,
this implementation uses Comparable.compareTo(T)
or
Comparator.compare(T, T)
instead of Object.equals(java.lang.Object)
to determine
equivalence of instances.
Warning: The comparison must be consistent with equals as
explained by the Comparable
class specification. Otherwise, the
resulting multiset will violate the Collection
contract, which it is
specified in terms of Object.equals(java.lang.Object)
.
See the Guava User Guide article on
Multiset
.
Multiset.Entry<E>
Modifier and Type  Method and Description 

Comparator<? super E> 
comparator()
Returns the comparator that orders this multiset, or
Ordering.natural() if the natural ordering of the elements is used. 
SortedMultiset<E> 
descendingMultiset()
Returns a descending view of this multiset.

NavigableSet<E> 
elementSet()
Returns a
NavigableSet view of the distinct elements in this multiset. 
Set<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. 
Multiset.Entry<E> 
firstEntry()
Returns the entry of the first element in this multiset, or
null if
this multiset is empty. 
SortedMultiset<E> 
headMultiset(E upperBound,
BoundType boundType)
Returns a view of this multiset restricted to the elements less than
upperBound , optionally including upperBound itself. 
Iterator<E> 
iterator() 
Multiset.Entry<E> 
lastEntry()
Returns the entry of the last element in this multiset, or
null if
this multiset is empty. 
Multiset.Entry<E> 
pollFirstEntry()
Returns and removes the entry associated with the lowest element in this
multiset, or returns
null if this multiset is empty. 
Multiset.Entry<E> 
pollLastEntry()
Returns and removes the entry associated with the greatest element in this
multiset, or returns
null if this multiset is empty. 
SortedMultiset<E> 
subMultiset(E lowerBound,
BoundType lowerBoundType,
E upperBound,
BoundType upperBoundType)
Returns a view of this multiset restricted to the range between
lowerBound and upperBound . 
SortedMultiset<E> 
tailMultiset(E lowerBound,
BoundType boundType)
Returns a view of this multiset restricted to the elements greater than
lowerBound , optionally including lowerBound itself. 
Comparator<? super E> comparator()
Ordering.natural()
if the natural ordering of the elements is used.Multiset.Entry<E> firstEntry()
null
if
this multiset is empty.Multiset.Entry<E> lastEntry()
null
if
this multiset is empty.Multiset.Entry<E> pollFirstEntry()
null
if this multiset is empty.Multiset.Entry<E> pollLastEntry()
null
if this multiset is empty.NavigableSet<E> elementSet()
NavigableSet
view of the distinct elements in this multiset.SortedSet
since 11.0)Set<Multiset.Entry<E>> entrySet()
Multiset.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 implementationdependent).
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.
The entrySet
's iterator returns entries in ascending element
order according to the this multiset's comparator.
Iterator<E> iterator()
Elements that occur multiple times in the multiset will appear multiple times in this iterator, though not necessarily sequentially.
The iterator returns the elements in ascending order according to this multiset's comparator.
SortedMultiset<E> descendingMultiset()
SortedMultiset<E> headMultiset(E upperBound, BoundType boundType)
upperBound
, optionally including upperBound
itself. The
returned multiset is a view of this multiset, so changes to one will be
reflected in the other. The returned multiset supports all operations that
this multiset supports.
The returned multiset will throw an IllegalArgumentException
on
attempts to add elements outside its range.
SortedMultiset<E> subMultiset(E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType)
lowerBound
and upperBound
. The returned multiset is a view
of this multiset, so changes to one will be reflected in the other. The
returned multiset supports all operations that this multiset supports.
The returned multiset will throw an IllegalArgumentException
on
attempts to add elements outside its range.
This method is equivalent to
tailMultiset(lowerBound, lowerBoundType).headMultiset(upperBound,
upperBoundType)
.
SortedMultiset<E> tailMultiset(E lowerBound, BoundType boundType)
lowerBound
, optionally including lowerBound
itself. The
returned multiset is a view of this multiset, so changes to one will be
reflected in the other. The returned multiset supports all operations that
this multiset supports.
The returned multiset will throw an IllegalArgumentException
on
attempts to add elements outside its range.
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