AISDatabaseParser.h

// -*- mode: c++; c-basic-offset:4 -*-

// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.

// Copyright (c) 2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@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
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.

#ifndef ais_database_parser_h
#define ais_database_parser_h

#include <string>

#include <libxml/parserInternals.h>

#ifndef _internal_err_h
#include "InternalErr.h"
#endif

#ifndef ais_exceptions_h
#include "AISExceptions.h"
#endif

#ifndef ais_resources_h
#include "AISResources.h"
#endif

namespace libdap
{

class AISDatabaseParser
{
private:
    enum ParseState {
        PARSER_START,
        PARSER_FINISH,
        AIS,
        ENTRY,
        PRIMARY,
        ANCILLARY,
        PARSER_UNKNOWN,
        PARSER_ERROR
    };

    struct AISParserState
    {
        ParseState state; // current state
        ParseState prev_state; // previous state
        int unknown_depth; // handle recursive unknown tags

        string error_msg; // Error message(s), if any.

        xmlParserCtxtPtr ctxt; // used for error msg line numbers
        AISResources *ais;  // dump info here

        string primary;  // current entry's primary URL/Regexp
        bool regexp;  // True if primary is a regexp

        ResourceVector rv; // add ancillary entries to rv
    };

public:
    void intern(const string &database, AISResources *ais);

    static void aisStartDocument(AISParserState *state);
    static void aisEndDocument(AISParserState *state);
    static void aisStartElement(AISParserState *state, const char *name,
                                const char **attrs);
    static void aisEndElement(AISParserState *state, const char *name);
    static xmlEntityPtr aisGetEntity(AISParserState *state,
                                     const xmlChar *name);
    static void aisWarning(AISParserState *state, const char *msg, ...);
    static void aisError(AISParserState *state, const char *msg, ...);
    static void aisFatalError(AISParserState *state, const char *msg, ...);
};

} // namespace libdap

#endif // ais_database_parser_h