mirror of https://gitee.com/bigwinds/arangodb
281 lines
10 KiB
C++
281 lines
10 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#include "Basics/JsonHelper.h"
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#include "Basics/conversions.h"
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#include "Basics/StringBuffer.h"
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#include "Basics/StringUtils.h"
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using namespace arangodb::basics;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief convert a JSON string or number into a uint64
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////////////////////////////////////////////////////////////////////////////////
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uint64_t JsonHelper::stringUInt64(TRI_json_t const* json) {
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if (json != nullptr) {
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if (json->_type == TRI_JSON_STRING) {
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return StringUtils::uint64(std::string(json->_value._string.data,
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json->_value._string.length - 1));
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} else if (json->_type == TRI_JSON_NUMBER) {
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return (uint64_t)json->_value._number;
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}
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}
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return 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief convert a JSON string or number into a uint64
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////////////////////////////////////////////////////////////////////////////////
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uint64_t JsonHelper::stringUInt64(TRI_json_t const* json, char const* name) {
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if (json == nullptr) {
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return 0;
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}
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TRI_json_t const* element = TRI_LookupObjectJson(json, name);
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return stringUInt64(element);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates an array of strings from a JSON (sub-) object
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////////////////////////////////////////////////////////////////////////////////
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std::vector<std::string> JsonHelper::stringArray(TRI_json_t const* json) {
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std::vector<std::string> result;
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if (isArray(json)) {
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size_t const n = TRI_LengthArrayJson(json);
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for (size_t i = 0; i < n; ++i) {
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auto v = static_cast<TRI_json_t const*>(
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TRI_AtVector(&json->_value._objects, i));
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if (TRI_IsStringJson(v)) {
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result.emplace_back(
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std::string(v->_value._string.data, v->_value._string.length - 1));
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}
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}
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}
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create JSON from string
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////////////////////////////////////////////////////////////////////////////////
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TRI_json_t* JsonHelper::fromString(std::string const& data) {
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return TRI_JsonString(TRI_UNKNOWN_MEM_ZONE, data.c_str());
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief stringify json
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////////////////////////////////////////////////////////////////////////////////
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std::string JsonHelper::toString(TRI_json_t const* json) {
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if (json == nullptr) {
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return "";
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}
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TRI_string_buffer_t buffer;
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TRI_InitStringBuffer(&buffer, TRI_UNKNOWN_MEM_ZONE);
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int res = TRI_StringifyJson(&buffer, json);
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if (res != TRI_ERROR_NO_ERROR) {
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TRI_DestroyStringBuffer(&buffer);
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return "";
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}
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std::string out(TRI_BeginStringBuffer(&buffer),
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TRI_LengthStringBuffer(&buffer));
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TRI_DestroyStringBuffer(&buffer);
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return out;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns an object sub-element
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////////////////////////////////////////////////////////////////////////////////
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TRI_json_t* JsonHelper::getObjectElement(TRI_json_t const* json,
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char const* name) {
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if (!TRI_IsObjectJson(json)) {
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return nullptr;
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}
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return TRI_LookupObjectJson(json, name);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string element, or a default if it is does not exist
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////////////////////////////////////////////////////////////////////////////////
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std::string JsonHelper::getStringValue(TRI_json_t const* json,
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std::string const& defaultValue) {
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if (TRI_IsStringJson(json)) {
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return std::string(json->_value._string.data,
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json->_value._string.length - 1);
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}
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return defaultValue;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or a default if it is does not exist
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////////////////////////////////////////////////////////////////////////////////
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std::string JsonHelper::getStringValue(TRI_json_t const* json, char const* name,
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std::string const& defaultValue) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (TRI_IsStringJson(sub)) {
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return std::string(sub->_value._string.data,
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sub->_value._string.length - 1);
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}
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return defaultValue;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a boolean sub-element, or a default if it is does not exist
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////////////////////////////////////////////////////////////////////////////////
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bool JsonHelper::getBooleanValue(TRI_json_t const* json, char const* name,
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bool defaultValue) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (TRI_IsBooleanJson(sub)) {
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return sub->_value._boolean;
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}
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return defaultValue;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a boolean sub-element, or throws an exception if the
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/// sub-element does not exist or if it is not boolean
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////////////////////////////////////////////////////////////////////////////////
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bool JsonHelper::checkAndGetBooleanValue(TRI_json_t const* json,
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char const* name) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (!TRI_IsBooleanJson(sub)) {
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std::string msg = "The attribute '" + std::string(name) +
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"' was not found or is not a boolean.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return sub->_value._boolean;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a string sub-element, or throws if <name> does not exist
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/// or it is not a string
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////////////////////////////////////////////////////////////////////////////////
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std::string JsonHelper::checkAndGetStringValue(TRI_json_t const* json,
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char const* name) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (!TRI_IsStringJson(sub)) {
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std::string msg = "The attribute '" + std::string(name) +
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"' was not found or is not a string.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return std::string(sub->_value._string.data, sub->_value._string.length - 1);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns an array sub-element, or throws an exception if the
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/// sub-element does not exist or if it is not an object
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////////////////////////////////////////////////////////////////////////////////
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TRI_json_t const* JsonHelper::checkAndGetObjectValue(TRI_json_t const* json,
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char const* name) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (!TRI_IsObjectJson(sub)) {
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std::string msg = "The attribute '" + std::string(name) +
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"' was not found or is not an object.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return sub;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns a list sub-element, or throws an exception if the
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/// sub-element does not exist or if it is not an array
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////////////////////////////////////////////////////////////////////////////////
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TRI_json_t const* JsonHelper::checkAndGetArrayValue(TRI_json_t const* json,
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char const* name) {
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TRI_json_t const* sub = getObjectElement(json, name);
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if (!TRI_IsArrayJson(sub)) {
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std::string msg = "The attribute '" + std::string(name) +
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"' was not found or is not an array.";
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_BAD_PARAMETER, msg);
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}
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return sub;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief append the JSON contents to an output stream
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////////////////////////////////////////////////////////////////////////////////
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std::ostream& operator<<(std::ostream& stream, Json const* json) {
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stream << json->toString();
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return stream;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief append the JSON contents to an output stream
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////////////////////////////////////////////////////////////////////////////////
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std::ostream& operator<<(std::ostream& stream, Json const& json) {
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stream << json.toString();
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return stream;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief append the JSON contents to an output stream
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////////////////////////////////////////////////////////////////////////////////
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std::ostream& operator<<(std::ostream& stream, TRI_json_t const* json) {
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stream << JsonHelper::toString(json);
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return stream;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief append the JSON contents to an output stream
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////////////////////////////////////////////////////////////////////////////////
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std::ostream& operator<<(std::ostream& stream, TRI_json_t const& json) {
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stream << JsonHelper::toString(&json);
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return stream;
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}
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