ArduinoJson/JsonGenerator/JsonHashTable.h

/*
 * Arduino JSON library
 * Benoit Blanchon 2014 - MIT License
 */

#pragma once

#include "EscapedString.h"
#include "JsonObjectBase.h"

namespace ArduinoJson
{
    namespace Generator
    {
        template<int N>
        class JsonHashTable : public JsonObjectBase
        {
        public:

            JsonHashTable()
            {
                itemCount = 0;
            }

            template<typename T>
            void add(const char* key, T value)
            {
                if (itemCount >= N) return;

                items[itemCount].key.set(key);
                items[itemCount].value.set(value);
                itemCount++;
            }

            template<int DIGITS>
            void add(const char* key, double value)
            {
                if (itemCount >= N) return;

                items[itemCount].key.set(key);
                items[itemCount].value.set<DIGITS>(value);
                itemCount++;
            }

            void add(const char* key, double value)
            {
                add<2>(key, value);
            }

            using JsonObjectBase::printTo;

        private:

            struct KeyValuePair
            {
                Internals::EscapedString  key;
                Internals::JsonValue      value;
            };

            KeyValuePair items[N];
            int itemCount;

            virtual size_t printTo(Print& p) const
            {
                size_t n = 0;

                n += p.write('{');

                for (int i = 0; i < itemCount; i++)
                {
                    if (i > 0)
                    {
                        n += p.write(',');
                    }

                    n += items[i].key.printTo(p);
                    n += p.write(':');
                    n += items[i].value.printTo(p);
                }

                n += p.write('}');

                return n;
            }
        };
    }
}