examples/chip-tool/commands/clusters/ComplexArgument.h - third_party/github/project-chip/connectedhomeip - Git at Google

 /*
  *   Copyright (c) 2022 Project CHIP Authors
  *   All rights reserved.
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
  *   You may obtain a copy of the License at
  *
  *       http://www.apache.org/licenses/LICENSE-2.0
  *
  *   Unless required by applicable law or agreed to in writing, software
  *   distributed under the License is distributed on an "AS IS" BASIS,
  *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *   See the License for the specific language governing permissions and
  *   limitations under the License.
  *
  */

 /**
  * This file allocate/free memory using the chip platform abstractions
  * (Platform::MemoryCalloc and Platform::MemoryFree) for hosting a subset of the
  * data model internal types until they are consumed by the DataModel::Encode machinery:
  *   - chip::app:DataModel::List<T>
  *   - chip::ByteSpan
  *   - chip::CharSpan
  *
  * Memory allocation happens during the 'Setup' phase, while memory deallocation happens
  * during the 'Finalize' phase.
  *
  * The 'Finalize' phase during the destructor phase, and if needed, 'Finalize' will call
  * the 'Finalize' phase of its descendant.
  */

 #pragma once

 #include <app-common/zap-generated/cluster-objects.h>
 #include <app/data-model/List.h>
 #include <app/data-model/Nullable.h>
 #include <commands/common/HexConversion.h>
 #include <json/json.h>
 #include <lib/core/Optional.h>
 #include <lib/support/BytesToHex.h>
 #include <lib/support/CHIPMemString.h>
 #include <lib/support/SafeInt.h>

 #include "JsonParser.h"

 inline constexpr uint8_t kMaxLabelLength = UINT8_MAX;
 inline constexpr char kNullString[]      = "null";

 class ComplexArgumentParser
 {
 public:
     ComplexArgumentParser() {}

     template <typename T,
               typename std::enable_if_t<std::is_integral<T>::value && !std::is_signed<T>::value &&
                                             !std::is_same<std::remove_cv_t<std::remove_reference_t<T>>, bool>::value,
                                         int> = 0>
     static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
     {
         if (value.isNumeric())
         {
             if (chip::CanCastTo<T>(value.asLargestUInt()))
             {
                 request = static_cast<T>(value.asLargestUInt());
                 return CHIP_NO_ERROR;
             }
         }
         else if (value.isString())
         {
             // Check for a hex number; JSON does not support those as numbers,
             // so they have to be done as strings.  And we might as well support
             // string-encoded unsigned numbers in general if we're doing that.
             bool isHexNotation = strncmp(value.asCString(), "0x", 2) == 0 || strncmp(value.asCString(), "0X", 2) == 0;

             std::stringstream str;
             isHexNotation ? str << std::hex << value.asCString() : str << value.asCString();
             uint64_t val;
             str >> val;
             if (!str.fail() && str.eof() && chip::CanCastTo<T>(val))
             {
                 request = static_cast<T>(val);
                 return CHIP_NO_ERROR;
             }
         }

         ChipLogError(chipTool, "Error while encoding %s as an unsigned integer.", label);
         return CHIP_ERROR_INVALID_ARGUMENT;
     }

     template <typename T, std::enable_if_t<std::is_signed<T>::value, bool> = true>
     static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
     {
         if (!value.isNumeric() || !chip::CanCastTo<T>(value.asLargestInt()))
         {
             ChipLogError(chipTool, "Error while encoding %s as an unsigned integer.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         request = static_cast<T>(value.asLargestInt());
         return CHIP_NO_ERROR;
     }

     template <typename T, typename std::enable_if_t<std::is_enum<T>::value, int> = 0>
     static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
     {
         std::underlying_type_t<T> requestValue;
         ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

         request = static_cast<T>(requestValue);
         return CHIP_NO_ERROR;
     }

     template <typename T>
     static CHIP_ERROR Setup(const char * label, chip::BitFlags<T> & request, Json::Value & value)
     {
         T requestValue;
         ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

         request = chip::BitFlags<T>(requestValue);
         return CHIP_NO_ERROR;
     }

     template <typename T>
     static CHIP_ERROR Setup(const char * label, chip::BitMask<T> & request, Json::Value & value)
     {
         T requestValue;
         ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

         request = chip::BitMask<T>(requestValue);
         return CHIP_NO_ERROR;
     }

     template <typename T>
     static CHIP_ERROR Setup(const char * label, chip::Optional<T> & request, Json::Value & value)
     {
         T requestValue;
         ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

         request = chip::Optional<T>(requestValue);
         return CHIP_NO_ERROR;
     }

     template <typename T>
     static CHIP_ERROR Setup(const char * label, chip::app::DataModel::Nullable<T> & request, Json::Value & value)
     {
         if (value.isNull())
         {
             request.SetNull();
             return CHIP_NO_ERROR;
         }

         T requestValue;
         ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

         request = chip::app::DataModel::Nullable<T>(requestValue);
         return CHIP_NO_ERROR;
     }

     template <typename T>
     static CHIP_ERROR Setup(const char * label, chip::app::DataModel::List<T> & request, Json::Value & value)
     {
         if (!value.isArray())
         {
             ChipLogError(chipTool, "Error while encoding %s as an array.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         auto content = static_cast<typename std::remove_const<T>::type *>(chip::Platform::MemoryCalloc(value.size(), sizeof(T)));
         VerifyOrReturnError(content != nullptr, CHIP_ERROR_NO_MEMORY);

         Json::ArrayIndex size = value.size();
         for (Json::ArrayIndex i = 0; i < size; i++)
         {
             char labelWithIndex[kMaxLabelLength];
             // GCC 7.0.1 has introduced some new warnings for snprintf (-Werror=format-truncation) by default.
             // This is not particularly useful when using snprintf and especially in this context, so in order
             // to disable the warning the %s is constrained to be of max length: (254 - 11 - 2) where:
             //  - 254 is kMaxLabelLength - 1 (for null)
             //  - 11 is the maximum length of a %d (-2147483648, 2147483647)
             //  - 2 is the length for the "[" and "]" characters.
             snprintf(labelWithIndex, sizeof(labelWithIndex), "%.241s[%d]", label, i);
             ReturnErrorOnFailure(ComplexArgumentParser::Setup(labelWithIndex, content[i], value[i]));
         }

         request = chip::app::DataModel::List<T>(content, value.size());
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR Setup(const char * label, chip::ByteSpan & request, Json::Value & value)
     {
         if (!value.isString())
         {
             ChipLogError(chipTool, "Error while encoding %s as an octet string: Not a string.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         auto str         = value.asString();
         auto size        = str.size();
         uint8_t * buffer = nullptr;

         if (IsStrString(str.c_str()))
         {
             // Skip the prefix
             str.erase(0, kStrStringPrefixLen);
             size = str.size();

             buffer = static_cast<uint8_t *>(chip::Platform::MemoryCalloc(size, sizeof(uint8_t)));
             VerifyOrReturnError(buffer != nullptr, CHIP_ERROR_NO_MEMORY);

             memcpy(buffer, str.c_str(), size);
         }
         else
         {
             if (IsHexString(str.c_str()))
             {
                 // Skip the prefix
                 str.erase(0, kHexStringPrefixLen);
                 size = str.size();
             }

             CHIP_ERROR err = HexToBytes(
                 chip::CharSpan(str.c_str(), size),
                 [&buffer](size_t allocSize) {
                     buffer = static_cast<uint8_t *>(chip::Platform::MemoryCalloc(allocSize, sizeof(uint8_t)));
                     return buffer;
                 },
                 &size);

             if (err != CHIP_NO_ERROR)
             {
                 if (buffer != nullptr)
                 {
                     chip::Platform::MemoryFree(buffer);
                 }

                 return err;
             }
         }

         request = chip::ByteSpan(buffer, size);
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR Setup(const char * label, chip::CharSpan & request, Json::Value & value)
     {
         if (!value.isString())
         {
             ChipLogError(chipTool, "Error while encoding %s as a string: Not a string.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         size_t size = strlen(value.asCString());
         auto buffer = static_cast<char *>(chip::Platform::MemoryCalloc(size, sizeof(char)));
         VerifyOrReturnError(buffer != nullptr, CHIP_ERROR_NO_MEMORY);

         memcpy(buffer, value.asCString(), size);

         request = chip::CharSpan(buffer, size);
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR Setup(const char * label, float & request, Json::Value & value)
     {
         if (!value.isNumeric())
         {
             ChipLogError(chipTool, "Error while encoding %s as a float: Not a number.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         request = static_cast<float>(value.asFloat());
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR Setup(const char * label, double & request, Json::Value & value)
     {
         if (!value.isNumeric())
         {
             ChipLogError(chipTool, "Error while encoding %s as a double: Not a number.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         request = static_cast<double>(value.asDouble());
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR Setup(const char * label, bool & request, Json::Value & value)
     {
         if (!value.isBool())
         {
             ChipLogError(chipTool, "Error while encoding %s as a boolean: Not a boolean.", label);
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         request = value.asBool();
         return CHIP_NO_ERROR;
     }

     static CHIP_ERROR EnsureMemberExist(const char * label, const char * memberName, bool hasMember)
     {
         if (hasMember)
         {
             return CHIP_NO_ERROR;
         }

         ChipLogError(chipTool, "%s is required.  Should be provided as {\"%s\": value}", label, memberName);
         return CHIP_ERROR_INVALID_ARGUMENT;
     }

     static CHIP_ERROR EnsureNoMembersRemaining(const char * label, const Json::Value & value)
     {
         auto remainingFields = value.getMemberNames();
         if (remainingFields.size() == 0)
         {
             return CHIP_NO_ERROR;
         }
 #if CHIP_ERROR_LOGGING
         for (auto & field : remainingFields)
         {
             ChipLogError(chipTool, "Unexpected field name: '%s.%s'", label, field.c_str());
         }
 #endif // CHIP_ERROR_LOGGING
         return CHIP_ERROR_INVALID_ARGUMENT;
     }

     template <typename T>
     static void Finalize(T & request)
     {
         // Nothing to do
     }

     template <typename T>
     static void Finalize(chip::Optional<T> & request)
     {
         VerifyOrReturn(request.HasValue());
         ComplexArgumentParser::Finalize(request.Value());
     }

     template <typename T>
     static void Finalize(chip::app::DataModel::Nullable<T> & request)
     {
         VerifyOrReturn(!request.IsNull());
         ComplexArgumentParser::Finalize(request.Value());
     }

     static void Finalize(chip::ByteSpan & request)
     {
         VerifyOrReturn(request.data() != nullptr);
         chip::Platform::MemoryFree(reinterpret_cast<void *>(const_cast<uint8_t *>(request.data())));
     }

     static void Finalize(chip::CharSpan & request)
     {
         VerifyOrReturn(request.data() != nullptr);
         chip::Platform::MemoryFree(reinterpret_cast<void *>(const_cast<char *>(request.data())));
     }

     template <typename T>
     static void Finalize(chip::app::DataModel::List<T> & request)
     {
         VerifyOrReturn(request.data() != nullptr);

         size_t size = request.size();
         auto data   = const_cast<typename std::remove_const<T>::type *>(request.data());
         for (size_t i = 0; i < size; i++)
         {
             Finalize(data[i]);
         }

         chip::Platform::MemoryFree(reinterpret_cast<void *>(data));
     }

 #include <zap-generated/cluster/ComplexArgumentParser.h>
 };

 class ComplexArgument
 {
 public:
     virtual ~ComplexArgument() {}

     virtual CHIP_ERROR Parse(const char * label, const char * json) = 0;

     virtual void Reset() = 0;
 };

 template <typename T>
 class TypedComplexArgument : public ComplexArgument
 {
 public:
     TypedComplexArgument() {}
     TypedComplexArgument(T * request) : mRequest(request) {}
     ~TypedComplexArgument()
     {
         if (mRequest != nullptr)
         {
             ComplexArgumentParser::Finalize(*mRequest);
         }
     }

     void SetArgument(T * request) { mRequest = request; };

     CHIP_ERROR Parse(const char * label, const char * json)
     {
         Json::Value value;
         if (strcmp(kNullString, json) == 0)
         {
             value = Json::nullValue;
         }
         else if (!JsonParser::ParseComplexArgument(label, json, value))
         {
             return CHIP_ERROR_INVALID_ARGUMENT;
         }

         return ComplexArgumentParser::Setup(label, *mRequest, value);
     }

     void Reset() { *mRequest = T(); }

 private:
     T * mRequest;
 };
	/*
	* Copyright (c) 2022 Project CHIP Authors
	* All rights reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/

	/**
	* This file allocate/free memory using the chip platform abstractions
	* (Platform::MemoryCalloc and Platform::MemoryFree) for hosting a subset of the
	* data model internal types until they are consumed by the DataModel::Encode machinery:
	* - chip::app:DataModel::List<T>
	* - chip::ByteSpan
	* - chip::CharSpan
	*
	* Memory allocation happens during the 'Setup' phase, while memory deallocation happens
	* during the 'Finalize' phase.
	*
	* The 'Finalize' phase during the destructor phase, and if needed, 'Finalize' will call
	* the 'Finalize' phase of its descendant.
	*/

	#pragma once

	#include <app-common/zap-generated/cluster-objects.h>
	#include <app/data-model/List.h>
	#include <app/data-model/Nullable.h>
	#include <commands/common/HexConversion.h>
	#include <json/json.h>
	#include <lib/core/Optional.h>
	#include <lib/support/BytesToHex.h>
	#include <lib/support/CHIPMemString.h>
	#include <lib/support/SafeInt.h>

	#include "JsonParser.h"

	inline constexpr uint8_t kMaxLabelLength = UINT8_MAX;
	inline constexpr char kNullString[] = "null";

	class ComplexArgumentParser
	{
	public:
	ComplexArgumentParser() {}

	template <typename T,
	typename std::enable_if_t<std::is_integral<T>::value && !std::is_signed<T>::value &&
	!std::is_same<std::remove_cv_t<std::remove_reference_t<T>>, bool>::value,
	int> = 0>
	static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
	{
	if (value.isNumeric())
	{
	if (chip::CanCastTo<T>(value.asLargestUInt()))
	{
	request = static_cast<T>(value.asLargestUInt());
	return CHIP_NO_ERROR;
	}
	}
	else if (value.isString())
	{
	// Check for a hex number; JSON does not support those as numbers,
	// so they have to be done as strings. And we might as well support
	// string-encoded unsigned numbers in general if we're doing that.
	bool isHexNotation = strncmp(value.asCString(), "0x", 2) == 0 \|\| strncmp(value.asCString(), "0X", 2) == 0;

	std::stringstream str;
	isHexNotation ? str << std::hex << value.asCString() : str << value.asCString();
	uint64_t val;
	str >> val;
	if (!str.fail() && str.eof() && chip::CanCastTo<T>(val))
	{
	request = static_cast<T>(val);
	return CHIP_NO_ERROR;
	}
	}

	ChipLogError(chipTool, "Error while encoding %s as an unsigned integer.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	template <typename T, std::enable_if_t<std::is_signed<T>::value, bool> = true>
	static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
	{
	if (!value.isNumeric() \|\| !chip::CanCastTo<T>(value.asLargestInt()))
	{
	ChipLogError(chipTool, "Error while encoding %s as an unsigned integer.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	request = static_cast<T>(value.asLargestInt());
	return CHIP_NO_ERROR;
	}

	template <typename T, typename std::enable_if_t<std::is_enum<T>::value, int> = 0>
	static CHIP_ERROR Setup(const char * label, T & request, Json::Value value)
	{
	std::underlying_type_t<T> requestValue;
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

	request = static_cast<T>(requestValue);
	return CHIP_NO_ERROR;
	}

	template <typename T>
	static CHIP_ERROR Setup(const char * label, chip::BitFlags<T> & request, Json::Value & value)
	{
	T requestValue;
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

	request = chip::BitFlags<T>(requestValue);
	return CHIP_NO_ERROR;
	}

	template <typename T>
	static CHIP_ERROR Setup(const char * label, chip::BitMask<T> & request, Json::Value & value)
	{
	T requestValue;
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

	request = chip::BitMask<T>(requestValue);
	return CHIP_NO_ERROR;
	}

	template <typename T>
	static CHIP_ERROR Setup(const char * label, chip::Optional<T> & request, Json::Value & value)
	{
	T requestValue;
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

	request = chip::Optional<T>(requestValue);
	return CHIP_NO_ERROR;
	}

	template <typename T>
	static CHIP_ERROR Setup(const char * label, chip::app::DataModel::Nullable<T> & request, Json::Value & value)
	{
	if (value.isNull())
	{
	request.SetNull();
	return CHIP_NO_ERROR;
	}

	T requestValue;
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(label, requestValue, value));

	request = chip::app::DataModel::Nullable<T>(requestValue);
	return CHIP_NO_ERROR;
	}

	template <typename T>
	static CHIP_ERROR Setup(const char * label, chip::app::DataModel::List<T> & request, Json::Value & value)
	{
	if (!value.isArray())
	{
	ChipLogError(chipTool, "Error while encoding %s as an array.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	auto content = static_cast<typename std::remove_const<T>::type *>(chip::Platform::MemoryCalloc(value.size(), sizeof(T)));
	VerifyOrReturnError(content != nullptr, CHIP_ERROR_NO_MEMORY);

	Json::ArrayIndex size = value.size();
	for (Json::ArrayIndex i = 0; i < size; i++)
	{
	char labelWithIndex[kMaxLabelLength];
	// GCC 7.0.1 has introduced some new warnings for snprintf (-Werror=format-truncation) by default.
	// This is not particularly useful when using snprintf and especially in this context, so in order
	// to disable the warning the %s is constrained to be of max length: (254 - 11 - 2) where:
	// - 254 is kMaxLabelLength - 1 (for null)
	// - 11 is the maximum length of a %d (-2147483648, 2147483647)
	// - 2 is the length for the "[" and "]" characters.
	snprintf(labelWithIndex, sizeof(labelWithIndex), "%.241s[%d]", label, i);
	ReturnErrorOnFailure(ComplexArgumentParser::Setup(labelWithIndex, content[i], value[i]));
	}

	request = chip::app::DataModel::List<T>(content, value.size());
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR Setup(const char * label, chip::ByteSpan & request, Json::Value & value)
	{
	if (!value.isString())
	{
	ChipLogError(chipTool, "Error while encoding %s as an octet string: Not a string.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	auto str = value.asString();
	auto size = str.size();
	uint8_t * buffer = nullptr;

	if (IsStrString(str.c_str()))
	{
	// Skip the prefix
	str.erase(0, kStrStringPrefixLen);
	size = str.size();

	buffer = static_cast<uint8_t *>(chip::Platform::MemoryCalloc(size, sizeof(uint8_t)));
	VerifyOrReturnError(buffer != nullptr, CHIP_ERROR_NO_MEMORY);

	memcpy(buffer, str.c_str(), size);
	}
	else
	{
	if (IsHexString(str.c_str()))
	{
	// Skip the prefix
	str.erase(0, kHexStringPrefixLen);
	size = str.size();
	}

	CHIP_ERROR err = HexToBytes(
	chip::CharSpan(str.c_str(), size),
	[&buffer](size_t allocSize) {
	buffer = static_cast<uint8_t *>(chip::Platform::MemoryCalloc(allocSize, sizeof(uint8_t)));
	return buffer;
	},
	&size);

	if (err != CHIP_NO_ERROR)
	{
	if (buffer != nullptr)
	{
	chip::Platform::MemoryFree(buffer);
	}

	return err;
	}
	}

	request = chip::ByteSpan(buffer, size);
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR Setup(const char * label, chip::CharSpan & request, Json::Value & value)
	{
	if (!value.isString())
	{
	ChipLogError(chipTool, "Error while encoding %s as a string: Not a string.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	size_t size = strlen(value.asCString());
	auto buffer = static_cast<char *>(chip::Platform::MemoryCalloc(size, sizeof(char)));
	VerifyOrReturnError(buffer != nullptr, CHIP_ERROR_NO_MEMORY);

	memcpy(buffer, value.asCString(), size);

	request = chip::CharSpan(buffer, size);
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR Setup(const char * label, float & request, Json::Value & value)
	{
	if (!value.isNumeric())
	{
	ChipLogError(chipTool, "Error while encoding %s as a float: Not a number.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	request = static_cast<float>(value.asFloat());
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR Setup(const char * label, double & request, Json::Value & value)
	{
	if (!value.isNumeric())
	{
	ChipLogError(chipTool, "Error while encoding %s as a double: Not a number.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	request = static_cast<double>(value.asDouble());
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR Setup(const char * label, bool & request, Json::Value & value)
	{
	if (!value.isBool())
	{
	ChipLogError(chipTool, "Error while encoding %s as a boolean: Not a boolean.", label);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	request = value.asBool();
	return CHIP_NO_ERROR;
	}

	static CHIP_ERROR EnsureMemberExist(const char * label, const char * memberName, bool hasMember)
	{
	if (hasMember)
	{
	return CHIP_NO_ERROR;
	}

	ChipLogError(chipTool, "%s is required. Should be provided as {\"%s\": value}", label, memberName);
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	static CHIP_ERROR EnsureNoMembersRemaining(const char * label, const Json::Value & value)
	{
	auto remainingFields = value.getMemberNames();
	if (remainingFields.size() == 0)
	{
	return CHIP_NO_ERROR;
	}
	#if CHIP_ERROR_LOGGING
	for (auto & field : remainingFields)
	{
	ChipLogError(chipTool, "Unexpected field name: '%s.%s'", label, field.c_str());
	}
	#endif // CHIP_ERROR_LOGGING
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	template <typename T>
	static void Finalize(T & request)
	{
	// Nothing to do
	}

	template <typename T>
	static void Finalize(chip::Optional<T> & request)
	{
	VerifyOrReturn(request.HasValue());
	ComplexArgumentParser::Finalize(request.Value());
	}

	template <typename T>
	static void Finalize(chip::app::DataModel::Nullable<T> & request)
	{
	VerifyOrReturn(!request.IsNull());
	ComplexArgumentParser::Finalize(request.Value());
	}

	static void Finalize(chip::ByteSpan & request)
	{
	VerifyOrReturn(request.data() != nullptr);
	chip::Platform::MemoryFree(reinterpret_cast<void >(const_cast<uint8_t >(request.data())));
	}

	static void Finalize(chip::CharSpan & request)
	{
	VerifyOrReturn(request.data() != nullptr);
	chip::Platform::MemoryFree(reinterpret_cast<void >(const_cast<char >(request.data())));
	}

	template <typename T>
	static void Finalize(chip::app::DataModel::List<T> & request)
	{
	VerifyOrReturn(request.data() != nullptr);

	size_t size = request.size();
	auto data = const_cast<typename std::remove_const<T>::type *>(request.data());
	for (size_t i = 0; i < size; i++)
	{
	Finalize(data[i]);
	}

	chip::Platform::MemoryFree(reinterpret_cast<void *>(data));
	}

	#include <zap-generated/cluster/ComplexArgumentParser.h>
	};

	class ComplexArgument
	{
	public:
	virtual ~ComplexArgument() {}

	virtual CHIP_ERROR Parse(const char * label, const char * json) = 0;

	virtual void Reset() = 0;
	};

	template <typename T>
	class TypedComplexArgument : public ComplexArgument
	{
	public:
	TypedComplexArgument() {}
	TypedComplexArgument(T * request) : mRequest(request) {}
	~TypedComplexArgument()
	{
	if (mRequest != nullptr)
	{
	ComplexArgumentParser::Finalize(*mRequest);
	}
	}

	void SetArgument(T * request) { mRequest = request; };

	CHIP_ERROR Parse(const char * label, const char * json)
	{
	Json::Value value;
	if (strcmp(kNullString, json) == 0)
	{
	value = Json::nullValue;
	}
	else if (!JsonParser::ParseComplexArgument(label, json, value))
	{
	return CHIP_ERROR_INVALID_ARGUMENT;
	}

	return ComplexArgumentParser::Setup(label, *mRequest, value);
	}

	void Reset() { *mRequest = T(); }

	private:
	T * mRequest;
	};