libjsonrpccpp-dev 0.7.0-1build2 / usr / include / jsonrpccpp / common / procedure.h

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/*************************************************************************
 * libjson-rpc-cpp
 *************************************************************************
 * @file    procedure.h
 * @date    31.12.2012
 * @author  Peter Spiess-Knafl <peter.knafl@gmail.com>
 * @license See attached LICENSE.txt
 ************************************************************************/

#ifndef JSONRPC_CPP_PROCEDURE_H_
#define JSONRPC_CPP_PROCEDURE_H_

#include <string>
#include <map>

#include "jsonparser.h"
#include "specification.h"

namespace jsonrpc
{
    typedef std::map<std::string, jsontype_t> parameterNameList_t;
    typedef std::vector<jsontype_t> parameterPositionList_t;

    typedef enum {PARAMS_BY_NAME, PARAMS_BY_POSITION} parameterDeclaration_t;

    class Procedure
    {
        public:

            Procedure();

            /**
             * @brief Constructor for notificaiton with parameters as va_list. The last parameter must be NULL.
             * If no parameters are passed, parameters either do not exist, or cannot be checked for type compliance by the library.
             * @param name
             */
            Procedure(const std::string& name, parameterDeclaration_t paramType, ...);

            /**
             * @brief Constructor for method with parameters as va_list. The last parameter must be NULL.
             * If no parameters are passed, parameters either do not exist, or cannot be checked for type compliance by the library.
             * @param name
             * @param returntype
             */
            Procedure(const std::string& name, parameterDeclaration_t paramType, jsontype_t returntype, ...);


            /**
             * This method is validating the incoming parameters for each procedure.
             * @param parameters - should contain the parameter-object of an valid json-rpc 2.0 request
             * @see http://groups.google.com/group/json-rpc/web/json-rpc-2-0
             * @return true on successful validation false otherwise.
             *
             * If the valid parameters are of Type JSON_ARRAY or JSON_OBJECT, they can only be checked for name and not for their structure.
             */
            bool ValdiateParameters(const Json::Value &parameters) const;


            //Various get methods.
            const parameterNameList_t&      GetParameters               () const;
            procedure_t                     GetProcedureType            () const;
            const std::string&              GetProcedureName            () const;
            jsontype_t                      GetReturnType               () const;
            parameterDeclaration_t          GetParameterDeclarationType () const;

            //Various set methods.
            void                            SetProcedureName            (const std::string &name);
            void                            SetProcedureType            (procedure_t type);
            void                            SetReturnType               (jsontype_t type);
            void                            SetParameterDeclarationType (parameterDeclaration_t type);


            /**
             * @brief AddParameter
             * @param name describes the name of the parameter. In case of an positional parameters, this value can be anything.
             * @param type describes the defined type for this parameter.
             */
            void AddParameter(const std::string& name, jsontype_t type);

            bool ValidateNamedParameters        (const Json::Value &parameters) const;
            bool ValidatePositionalParameters   (const Json::Value &parameters) const;

        private:

            /**
             * Each Procedure should have a name.
             */
            std::string                 procedureName;

            /**
             * This map represents all necessary Parameters of each Procedure.
             * The string represents the name of each parameter and JsonType the type it should have.
             */
            parameterNameList_t         parametersName;

            /**
             * This vector holds all parametertypes by position.
             */
            parameterPositionList_t     parametersPosition;

            /**
             * @brief defines whether the procedure is a method or a notification
             */
            procedure_t                 procedureType;

            /**
             * @brief this field is only valid if procedure is of type method (not notification).
             */
            jsontype_t                  returntype;

            /**
             * @brief paramDeclaration this field defines if procedure uses named or positional parameters.
             */
            parameterDeclaration_t      paramDeclaration;

            bool ValidateSingleParameter        (jsontype_t expectedType, const Json::Value &value) const;
    };
} /* namespace jsonrpc */
#endif /* JSONRPC_CPP_PROCEDURE_H_ */

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