common
Class SetBackedMultiset

java.lang.Object
  java.util.AbstractCollection
      common.AbstractMultiset
          common.SetBackedMultiset

All Implemented Interfaces:

Multiset, java.lang.Iterable, java.util.Collection

public class SetBackedMultiset
extends AbstractMultiset

An unmodifiable Multiset implementation that just wraps around a Set object.

Constructor Summary

SetBackedMultiset(java.util.Set s)
Creates a new SetBackedMultiset that will be backed by the given set.

Method Summary

int	count(java.lang.Object o) Returns the number of occurrences of the given element in this multiset.
java.util.Set	entrySet() Returns the set of entries in the multiset.
java.util.Iterator	iterator() Returns an iterator over this multiset.
int	size() Returns the number of elements in this multiset.

Methods inherited from class common.AbstractMultiset

contains, equals, hashCode

Methods inherited from class java.util.AbstractCollection

add, addAll, clear, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

add, addAll, clear, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Constructor Detail

SetBackedMultiset

public SetBackedMultiset(java.util.Set s)

Creates a new SetBackedMultiset that will be backed by the given set. If the contents of the given set change, the contents of this SetBackedMultiset will change too.

Method Detail

size

public int size()

Returns the number of elements in this multiset.

Specified by:

size in interface java.util.Collection

Specified by:

size in class java.util.AbstractCollection

count

public int count(java.lang.Object o)

Returns the number of occurrences of the given element in this multiset.

Specified by:

count in interface Multiset

Specified by:

count in class AbstractMultiset

iterator

public java.util.Iterator iterator()

Returns an iterator over this multiset. If the multiset contains n copies of an element, the iterator will return that element n times.

Specified by:

iterator in interface java.lang.Iterable

Specified by:

iterator in interface java.util.Collection

Specified by:

iterator in class java.util.AbstractCollection

entrySet

public java.util.Set entrySet()

Returns the set of entries in the multiset. An entry is a pair (e, n) where e is an element of the multiset and n is the number of times e occurs in the multiset. The returned set contains exactly one entry for each distinct element e. Thus, entrySet.size() returns the number of distinct elements in the multiset.

Specified by:

entrySet in interface Multiset

Specified by:

entrySet in class AbstractMultiset

Returns:

a Set of Multiset.Entry objects