// @(#)$Id: AbstractCollection.jml,v 1.8 2006/12/11 23:09:41 chalin Exp $

// Copyright (C) 2005 Iowa State University
//
// This file is part of the runtime library of the Java Modeling Language.
//
// 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 JML; see the file LesserGPL.txt.  If not, write to the Free
// Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
// 02110-1301  USA.

package java.util;

public abstract class AbstractCollection implements Collection {

    /*@ protected normal_behavior
      @   ensures true;
      @*/
    //@ pure
    protected AbstractCollection();

    // Query Operations

    // specification inherited from Collection
    public abstract /*@ pure @*/ Iterator iterator();

    // specification inherited from Collection
    public abstract /*@ pure @*/ int size();

    // specification inherited from Collection
    public /*@ pure @*/ boolean isEmpty();

    // specification inherited from Collection
    public /*@ pure @*/ boolean contains(/*@nullable*/ Object o);

    // specification inherited from Collection
    public /*@ pure @*/ Object[] toArray();

    // specification inherited from Collection
    public Object[] toArray(Object[] a);

    // Modification Operations

    // specification inherited from Collection
    public boolean add(/*@nullable*/ Object o);

    // specification inherited from Collection
    public boolean remove(/*@nullable*/ Object o);

    // Bulk Operations

    // specification inherited from Collection
    public /*@ pure @*/ boolean containsAll(Collection c);

    // specification inherited from Collection
    public boolean addAll(Collection c);

    // specification inherited from Collection
    public boolean removeAll(Collection c);

    // specification inherited from Collection
    public boolean retainAll(Collection c);

    // specification inherited from Collection
    public void clear();

    //  String conversion

    // specification inherited from Collection
    public String toString();
}