Constraint.hpp

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/*
 * Copyright (C) 2004  Andrew Sutton
 *
 * 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.
 * 59 Temple Place, Suite 330
 * Boston, MA  02111-1307  USA
 *
 * Contact:
 *   Andrew Sutton  asutton@cs.kent.edu
 */

#ifndef MODEL_CONSTRAINT_HPP
#define MODEL_CONSTRAINT_HPP

// Model includes
#include <Model/ModelPackage.hpp>
#include <Model/ModelElement.hpp>
#include <Model/EvaluationKind.hpp>

namespace Model
{
  // forward declarations
  struct ConstraintImpl;

  class Constraint : virtual public ModelElement
  {
  public:
    typedef OMF::BasicClass<ConstraintImpl> Proxy;

    Constraint();
    virtual ~Constraint();

    const OMF::String &expression() const;
    void setExpression(const OMF::String &expression);
    void clearExpression();

    const OMF::String &language() const;
    void setLanguage(const OMF::String &language);
    void clearLanguage();

    const EvaluationKind &evaluationPolicy() const;
    void setEvaluationPolicy(const EvaluationKind &policy);
    void clearEvaluationPolicy();

    const OMF::Set &constrainedElements() const;
    void addConstrainedElements(ModelElement *element);
    void removeConstrainedElements(ModelElement *element);
    void clearConstrainedElements();

  private:
    OMF::String   _expression;
    OMF::String   _language;
    EvaluationKind  _evaluationPolicy;
    OMF::Set    _constrainedElements;
  };

  struct ConstraintImpl : virtual public Constraint
  {
    ConstraintImpl() :
      OMF::ModelObject("Model.Constraint",
           &Constraint::Proxy::instance(),
           &ModelPackage::instance()),
      ModelElement(),
      Constraint()
    {}

    virtual ~ConstraintImpl()
    {}
  };
}

#endif

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