JSONPath.h

/*
 * Fledge RapaidJSON JSONPath search helper
 *
 * Copyright (c) 2020 Dianomic Systems
 *
 * Released under the Apache 2.0 Licence
 *
 * Author: Mark Riddoch
 */
#ifndef _JSONPATH_H
#define _JSONPATH_H
 
#include <rapidjson/document.h>
#include <string>
#include <vector>
#include <logger.h>
 
class JSONPath {
    public:
        JSONPath(const std::string& path);
        ~JSONPath();
        rapidjson::Value *findNode(rapidjson::Value& root);
    private:
        class PathComponent {
            public:
                virtual rapidjson::Value *match(rapidjson::Value *node) = 0;
        };
        class LiteralPathComponent : public PathComponent {
            public:
                LiteralPathComponent(std::string& name);
                rapidjson::Value *match(rapidjson::Value *node);
            private:
                std::string m_name;
        };
        class IndexPathComponent : public PathComponent {
            public:
                IndexPathComponent(std::string& name, int index);
                rapidjson::Value *match(rapidjson::Value *node);
            private:
                std::string m_name;
                int     m_index;
        };
        class MatchPathComponent : public PathComponent {
            public:
                MatchPathComponent(std::string& name, std::string& property, std::string& value);
                rapidjson::Value *match(rapidjson::Value *node);
            private:
                std::string m_name;
                std::string m_property;
                std::string m_value;
        };
        void        parse();
        std::string m_path;
        std::vector<PathComponent *>
                m_parsed;
        Logger      *m_logger;
};
 
#endif