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/* collection.vala
*
* Copyright (C) 2007 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
/**
* Serves as the base interface for implementing collection classes. Defines
* size, iteration, and modification methods.
*/
public abstract class Vala.Collection<G> : Iterable<G> {
/**
* The number of items in this collection.
*/
public abstract int size { get; }
/**
* Determines whether this collection contains the specified item.
*
* @param item the item to locate in the collection
*
* @return true if item is found, false otherwise
*/
public abstract bool contains (G item);
/**
* Adds an item to this collection. Must not be called on read-only
* collections.
*
* @param item the item to add to the collection
*
* @return true if the collection has been changed, false otherwise
*/
public abstract bool add (G item);
/**
* Removes the first occurrence of an item from this collection. Must not
* be called on read-only collections.
*
* @param item the item to remove from the collection
*
* @return true if the collection has been changed, false otherwise
*/
public abstract bool remove (G item);
/**
* Removes all items from this collection. Must not be called on
* read-only collections.
*/
public abstract void clear ();
}
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