AISDatabaseParser.h

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// -*- 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