concrete_range_entity_iterator.hpp

// Copyright (C) 2011-2012 by the BEM++ Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#ifndef bempp_concrete_range_entity_iterator_hpp
#define bempp_concrete_range_entity_iterator_hpp

#include "../common/common.hpp"

#include "entity_iterator.hpp"
#include "concrete_entity_decl.hpp"

namespace Bempp
{

class DomainIndex;

template<typename DuneEntityIt, typename DuneEntityPointer>
class ConcreteRangeEntityIterator: public EntityIterator<
    DuneEntityIt::codimension>
{
private:
    DuneEntityIt m_begin, m_end, m_cur;
    ConcreteEntity<ConcreteRangeEntityIterator::codimension,
                   typename DuneEntityIt::Entity> m_entity;
    const DomainIndex& m_domain_index;

    void updateEntity() {
        if (!this->finished())
            m_entity.setDuneEntity(&*m_cur);
    }

    void updateFinished() {
        this->m_finished = (m_cur == m_end);
    }

public:
    ConcreteRangeEntityIterator(const DuneEntityIt& begin,
                                const DuneEntityIt& end,
                                const DomainIndex& domain_index) :
        m_begin(begin), m_end(end), m_cur(begin), m_entity(domain_index),
        m_domain_index(domain_index) {
        updateFinished();
        updateEntity();
    }

    virtual void next() {
        ++m_cur;
        updateFinished();
        updateEntity();
    }

    virtual const Entity<ConcreteRangeEntityIterator::codimension>& entity() const {
        return m_entity;
    }

    virtual std::auto_ptr<EntityPointer<ConcreteRangeEntityIterator::codimension> > frozen() const {
        const int codim = ConcreteRangeEntityIterator::codimension;
        return std::auto_ptr<EntityPointer<codim> >(
                    new ConcreteEntityPointer<DuneEntityPointer>(
                        *m_cur, m_domain_index));
    }
};

} // namespace Bempp

#endif