common
Class AbstractMultiset

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

All Implemented Interfaces:

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

Direct Known Subclasses:

HashMultiset, SetBackedMultiset

public abstract class AbstractMultiset
extends java.util.AbstractCollection
implements Multiset

Abstract implementation of the Multiset class.

Nested Class Summary

static class

AbstractMultiset.Entry Abstract implementation of the Multiset.Entry interface.

Constructor Summary

AbstractMultiset()

Method Summary

boolean	contains(java.lang.Object o) Returns true if count(o) returns a number greater than zero.
abstract int	count(java.lang.Object o) Returns the number of occurrences of the given element in this multiset.
abstract java.util.Set	entrySet() Returns the set of entries in the multiset.
boolean	equals(java.lang.Object o) Two multisets are equal if they have the same elements with the same occurrence counts.
int	hashCode()

Methods inherited from class java.util.AbstractCollection

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

Constructor Detail

AbstractMultiset

public AbstractMultiset()

Method Detail

count

public abstract int count(java.lang.Object o)

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

Specified by:

count in interface Multiset

entrySet

public abstract 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. The returned set supports element removal: removing an entry corresponds to deleting all occurrences of the corresponding element from the multiset. However, the returned set does not support the add or addAll methods.

Specified by:

entrySet in interface Multiset

Returns:

a Set of Multiset.Entry objects

contains

public boolean contains(java.lang.Object o)

Returns true if count(o) returns a number greater than zero.

Specified by:

contains in interface java.util.Collection

Overrides:

contains in class java.util.AbstractCollection

equals

public boolean equals(java.lang.Object o)

Two multisets are equal if they have the same elements with the same occurrence counts.

Specified by:

equals in interface java.util.Collection

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection

Overrides:

hashCode in class java.lang.Object