TextReader.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 Oct 2010
 
#ifndef odc_TextReader_H
#define odc_TextReader_H
 
#ifdef SWIGPYTHON
#include <Python.h>
#endif
 
#include "eckit/memory/NonCopyable.h"
 
#include "odc/IteratorProxy.h"
 
namespace eckit { class PathName; }
 
namespace odc {
 
//----------------------------------------------------------------------------------------------------------------------
 
class TextReaderIterator;
 
class TextReader : private eckit::NonCopyable
{
public:
    typedef IteratorProxy<TextReaderIterator,TextReader,double> iterator;
    typedef iterator::Row row;
 
    TextReader(std::istream &, const std::string& delimiter);
    TextReader(const std::string& path, const std::string& delimiter);
 
    TextReader(TextReader&&);
    TextReader& operator=(TextReader&&);
 
    virtual ~TextReader();
 
    iterator begin();
    iterator end() const;
 
    std::istream& stream() { return *in_; }
 
    // For C API
//  TextReaderIterator* createReadIterator(const eckit::PathName&);
 
#ifdef SWIGPYTHON
    iterator __iter__() { return begin(); }
#endif
 
    const std::string& delimiter() { return delimiter_; }
private:
 
    std::istream* in_;
    bool deleteDataHandle_;
    std::string delimiter_;
 
    // This is a bit nasty. The TextReader currently assumes that the data will only be
    // iterated _once_ (hence initiated by an istream). Therefore only create the iterator
    // once so that the MetaData doesn't get read from the stream multiple times.
    iterator iteratorSingleton_;
 
    friend class odc::IteratorProxy<odc::TextReaderIterator,odc::TextReader,double>;
    friend class odc::TextReaderIterator;
};
 
//----------------------------------------------------------------------------------------------------------------------
 
} // namespace odc
 
#endif