/*******************************************************************************
* Copyright (c) 2010, 2014 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM - Initial API and implementation
*******************************************************************************/
package org.eclipse.ocl.pivot.values;
import java.util.Collection;
/**
* A bag is a collection that is non-unique and unordered. It is, therefore,
* like a set except that any element may occur multiple times.
*
* @author Christian W. Damus (cdamus)
*/
public interface Bag<E> extends Collection<E> {
/**
* Queries how many times the specified object occurs in me.
* If I do not contain the object, then the count is zero.
*
* @param o an object
* @return the number of times that it occurs in me
*/
int count(Object o);
}