3 * Copyright (C) 2009 Ali Sabil
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * Ali Sabil <ali.sabil@gmail.com>
24 * A collection with duplicate elements.
27 public interface Gee.MultiSet<G> : Collection<G> {
29 * Returns the number of occurences of an item in this multiset.
31 * @param item the item to count occurences of
33 * @return the number of occurences of the item in this multiset.
35 public abstract int count (G item);
38 * The read-only view of this set.
40 public virtual new MultiSet<G> read_only_view {
42 return new ReadOnlyMultiSet<G> (this);
47 * Returns an immutable empty set.
49 * @return an immutable empty set
51 public static Set<G> empty<G> () {
52 return new HashSet<G> ().read_only_view;