ODAOutput.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.
 */
 
/// @author Piotr Kuchta
/// @author Simon Smart
/// @date Jan 2009
/// @date Aug 2018
 
#ifndef odc_sql_ODAOutput_H
#define odc_sql_ODAOutput_H
 
 
#include "eckit/sql/SQLOutput.h"
#include "odc/core/MetaData.h"
 
namespace odc {
namespace sql {
 
//----------------------------------------------------------------------------------------------------------------------
 
template <typename WRITER>
class ODAOutput : public eckit::sql::SQLOutput {
public:
 
    ODAOutput(WRITER*);
//  ODAOutput(WRITER*, const MetaData&);
    virtual ~ODAOutput(); // Change to virtual if base class
 
private: // methods
 
    virtual void print(std::ostream&) const override;
 
// -- Members
 
    std::unique_ptr<WRITER> writer_;
 
    typename WRITER::iterator it_;
 
//    MetaData metaData_;
 
    unsigned long long count_;
 
// -- Overridden methods
    virtual void reset() override;
    virtual void flush() override;
    virtual bool output(const eckit::sql::expression::Expressions&) override;
    virtual void preprepare(eckit::sql::SQLSelect&) override;
    virtual void prepare(eckit::sql::SQLSelect&) override;
    virtual void cleanup(eckit::sql::SQLSelect&) override;
    virtual unsigned long long count() override;
 
    // Overridden (and removed) functions
 
    virtual void outputReal(double, bool) override;
    virtual void outputDouble(double, bool) override;
    virtual void outputInt(double, bool) override;
    virtual void outputUnsignedInt(double, bool) override;
    virtual void outputString(const char*, size_t, bool) override;
    virtual void outputBitfield(double, bool) override;
};
 
//----------------------------------------------------------------------------------------------------------------------
 
} // namespace sql
 
//----------------------------------------------------------------------------------------------------------------------
 
// We explicitly instantiate this template in the .cc file, so don't instantiate in each
// translation unit.
 
class WriterBufferingIterator;
template <typename ITERATOR> class Writer;
class DispatchingWriter;
 
extern template class sql::ODAOutput<Writer<WriterBufferingIterator>>;
extern template class sql::ODAOutput<DispatchingWriter>;
 
//----------------------------------------------------------------------------------------------------------------------
 
} // namespace odc
 
#endif