SaxParserWrapper.h

// This file is part of the "NcML Module" project, a BES module designed
// to allow NcML files to be used to be used as a wrapper to add
// AIS to existing datasets of any format.
//
// Copyright (c) 2009 OPeNDAP, Inc.
// Author: Michael Johnson  <m.johnson@opendap.org>
//
// For more information, please also see the main website: http://opendap.org/
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// Please see the files COPYING and COPYRIGHT for more information on the GLPL.
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#ifndef __NCML_MODULE__SAX_PARSER_WRAPPER_H__
#define __NCML_MODULE__SAX_PARSER_WRAPPER_H__
 
#include <string>
#include <libxml/parserInternals.h>
#include "BESError.h"
 
namespace ncml_module {
class SaxParser;
}
 
namespace ncml_module {
class SaxParserWrapper {
private:
    // Inner Classes

    enum ParserState {
        NOT_PARSING = 0, PARSING, EXCEPTION, NUM_STATES
    };
 
private:
    // Data Rep

    SaxParser& _parser;

    xmlSAXHandler _handler;
 
#if 1
    xmlParserCtxtPtr _context;
#endif
 

    ParserState _state;

    std::string _errorMsg;
    int _errorType;
    std::string _errorFile;
    int _errorLine;
 
private:
    SaxParserWrapper(const SaxParserWrapper&); // illegal
    SaxParserWrapper& operator=(const SaxParserWrapper&); // illegal
 
public:
    explicit SaxParserWrapper(SaxParser& parser);
    virtual ~SaxParserWrapper();

    bool parse(const std::string& ncmlFilename);
 
    SaxParser& getParser() const
    {
        return _parser;
    }


    void deferException(BESError& theErr);

    bool isExceptionState() const
    {
        return _state == EXCEPTION;
    }

    void rethrowException();

    int getCurrentParseLine() const;
 
private:

    void setupParser();
 
#if 1
    // Leak fix. jhrg 6/21/19
    void cleanupParser() noexcept;
#endif
 
 
};
// class SaxParserWrapper
 
}// namespace ncml_module
 
#endif /*__NCML_MODULE__SAX_PARSER_WRAPPER_H__ */