ODAUpdatingIterator.h

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/*
 * (C) Copyright 1996-2012 ECMWF.
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 * In applying this licence, ECMWF does not waive the privileges and immunities 
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */
 
///
/// \file ODAUpdatingIterator.h
///
/// @author Piotr Kuchta, June 2009
 
#ifndef ODAUpdatingIterator_H
#define ODAUpdatingIterator_H
 
namespace odc {
 
namespace core { class MetaData; }
 
template <typename T>
class ODAUpdatingIterator 
{
public:
    ODAUpdatingIterator (T& inputIterator, const T& end, const std::vector<std::string>& columns, const std::vector<double>& values);
    ODAUpdatingIterator (const T& end);
    ~ODAUpdatingIterator ();
 
    bool isNewDataset();
    double* data() { return data_; }
 
    const core::MetaData& columns() { return ii_->columns(); }
    const core::MetaData& columns(core::MetaData& md) { return ii_->columns(md); }
 
    ODAUpdatingIterator& operator++() { next(0); return *this; }
 
    bool operator!=(const ODAUpdatingIterator& o) { ASSERT(&o == 0); return ii_ != end_; }
 
//protected:
    bool next();
 
private:
// No copy allowed.
    ODAUpdatingIterator(const ODAUpdatingIterator&);
    ODAUpdatingIterator& operator=(const ODAUpdatingIterator&);
 
    void update();
    void updateIndices();
 
    // Input iterator.
    T ii_;
    const T& end_;
 
    std::vector<std::string> columns_;
    std::vector<size_t> columnIndices_;
    const std::vector<double> values_;
 
    double *data_;
public:
    int refCount_;
    bool noMore_;
};
 
} // namespace odc 
 
#include "odc/ODAUpdatingIterator.cc"
 
#endif