BESXMLCommand.h

// BESXMLCommand.h
 
// This file is part of bes, A C++ back-end server implementation framework
// for the OPeNDAP Data Access Protocol.
 
// Copyright (c) 2004-2009 University Corporation for Atmospheric Research
// Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
//
// 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 University Corporation for Atmospheric Research at
// 3080 Center Green Drive, Boulder, CO 80301
 
// (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
// Please read the full copyright statement in the file COPYRIGHT_UCAR.
//
// Authors:
//      pwest       Patrick West <pwest@ucar.edu>
//      jgarcia     Jose Garcia <jgarcia@ucar.edu>
 
#ifndef A_BESXMLCommand_h
#define A_BESXMLCommand_h 1
 
#include <string>
#include <map>
 
#include <libxml/encoding.h>
#include <libxml/tree.h>
 
#include "BESObj.h"
#include "BESDataHandlerInterface.h"
 
//class BESResponseHandler;
class BESXMLCommand;

typedef BESXMLCommand *(*p_xmlcmd_builder)(const BESDataHandlerInterface &dhi);

class BESXMLCommand: public BESObj {
private:
    static std::map<std::string, p_xmlcmd_builder> factory;
    typedef std::map<std::string, p_xmlcmd_builder>::iterator cmd_iter;
 
protected:
    BESDataHandlerInterface d_xmlcmd_dhi;
    virtual void set_response();

    std::string d_cmd_log_info;
 
    BESXMLCommand(const BESDataHandlerInterface &base_dhi);
 
public:
    virtual ~BESXMLCommand()
    {
    }

    virtual void parse_request(xmlNode *node) = 0;

    virtual bool has_response() = 0;

    virtual void prep_request()
    {
    }

    virtual BESDataHandlerInterface &get_xmlcmd_dhi()
    {
        return d_xmlcmd_dhi;
    }
 
    virtual void dump(std::ostream &strm) const;
 
    static void add_command(const std::string &cmd_str, p_xmlcmd_builder cmd);
    static void del_command(const std::string &cmd_str);
    static p_xmlcmd_builder find_command(const std::string &cmd_str);
};
 
#endif // A_BESXMLCommand_h