JSONDeserialiserHelpers.hpp File Reference

JSONDeserialiserHelpers specification. More...

#include <simdjson.h>
#include <unordered_map>
#include "../Sensor.hpp"
#include "../factories/SignalFactory.hpp"

Go to the source code of this file.

Classes
class	echomap::JSONDeserialiserHelpers
	Provides a set of static helpers for parsing Project fields with SIMDJSON. More...

Namespaces
namespace	echomap
	The main EchoMap outermost namespace for all non-exported symbols.

Functions
template<typename simdjson_value>
auto	simdjson::tag_invoke (deserialize_tag, simdjson_value &value, echomap::SignalFactory &signal_factory)
template<typename simdjson_value>
static error_code	simdjson::tag_invoke (deserialize_tag, simdjson_value &value, echomap::Sensor &sensor)

Detailed Description

JSONDeserialiserHelpers specification.

Author

Oliver Dixon

Date

2026-07-25

Definition in file JSONDeserialiserHelpers.hpp.

Function Documentation

tag_invoke() [1/2]

template<typename simdjson_value>

error_code simdjson::tag_invoke ( deserialize_tag , simdjson_value & value, echomap::Sensor & sensor )

static

Definition at line 178 of file JSONDeserialiserHelpers.hpp.

{
    ondemand::object root;
    auto error = value.get_object().get(root);
    if (error)
        return error;
 
    std::string_view name;
    if ((error = root["name"].get(name)))
        return error;
    sensor.set_name(name);
 
    ondemand::object position;
    if ((error = root["position"].get_object().get(position)))
        return error;
 
    if ((error = position["x"].get(sensor.position.x)))
        return error;
    if ((error = position["y"].get(sensor.position.y)))
        return error;
    if ((error = position["z"].get(sensor.position.z)))
        return error;
 
    ondemand::object colour;
    if ((error = root["colour"].get_object().get(colour)))
        return error;
 
    if ((error = colour["r"].get(sensor.colour.r)))
        return error;
    if ((error = colour["g"].get(sensor.colour.g)))
        return error;
    if ((error = colour["b"].get(sensor.colour.b)))
        return error;
    if ((error = colour["a"].get(sensor.colour.a)))
        return error;
 
    return SUCCESS;
}

tag_invoke() [2/2]

template<typename simdjson_value>

auto simdjson::tag_invoke	(	deserialize_tag	,
		simdjson_value &	value,
		echomap::SignalFactory &	signal_factory )

Definition at line 127 of file JSONDeserialiserHelpers.hpp.

{
    ondemand::object root;
    auto error = value.get_object().get(root);
    if (error)
        return error;
 
    std::string_view name;
    if ((error = root["name"].get(name)))
        return error;
    signal_factory.set_signal_name(name);
 
    ondemand::object source;
    if ((error = root["source"].get_object().get(source)))
        return error;
 
    std::string_view kind;
    if ((error = source["kind"].get(kind)))
        return error;
 
    if (kind == "filesystem") {
        // Signals sourced from the file system are not loaded by the parser; we just populate the source information.
 
        std::string_view path;
        if ((error = source["path"].get(path)))
            return error;
 
        std::size_t channel_num;
        if ((error = source["channel"].get(channel_num)))
            return error;
 
        signal_factory.set_source(path, channel_num);
    } else if (kind == "embeddedUniform") {
        // Embedded signals with uniform sampling are constructed by the parser with the mandatory timing information.
        if ((error = echomap::JSONDeserialiserHelpers::get_uniformly_sampled_signal_source(source, signal_factory)))
            return error;
    } else if (kind == "embeddedVariable") {
        // Embedded signals with variable sampling are constructed by the parser with the optional timing information.
        if ((error = echomap::JSONDeserialiserHelpers::get_variably_sampled_signal_source(source, signal_factory)))
            return error;
    } else
        throw std::runtime_error(std::format("Signal {} specifies unknown source kind \"{}\".", name, kind));
 
    return SUCCESS;
}