| /* |
| * Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #ifndef _11AD_JSON_SERIALIZE_HELPER_H_ |
| #define _11AD_JSON_SERIALIZE_HELPER_H_ |
| |
| #include <ostream> |
| #include <string> |
| #include <vector> |
| #include <memory> |
| #include "DebugLogger.h" |
| |
| // Interface for composite types to be used as part of event payload |
| class JsonSerializable |
| { |
| public: |
| virtual void ToJson(std::ostream& os) const = 0; |
| virtual ~JsonSerializable() {} |
| }; |
| |
| |
| // Helper class implementing the serialization services in Json format |
| class JsonSerializeHelper final |
| { |
| public: |
| explicit JsonSerializeHelper(std::ostream& os); |
| |
| ~JsonSerializeHelper(); |
| |
| void Serialize(const char* key, const std::string& value); |
| |
| void Serialize(const char* key, const char* value); |
| |
| void Serialize(const char* key, const unsigned long long value); |
| |
| // Serialization service for composite member that implements the JsonSerializable interface |
| void SerializeComposite(const char* key, const JsonSerializable& value); |
| |
| void SerializeCompositeArray(const char* key, const std::vector<std::unique_ptr<JsonSerializable>>& values); |
| |
| // Type of template can be any iterable container |
| template<class T> |
| void SerializeStringArray(const char* key, const T& values) |
| { |
| m_os << R"_(")_" << key << R"_(":[)_"; |
| |
| bool first = true; |
| for (auto & val : values) |
| { |
| if (!first) { |
| m_os << ","; |
| } |
| first = false; |
| m_os << R"_(")_" << val << R"_(")_"; |
| } |
| m_os << "],"; |
| } |
| |
| // Encode given binary array as Base64 string |
| static std::string Base64Encode(const std::vector<unsigned char>& binaryData); |
| static std::string Base64Encode(const unsigned char binaryData[], unsigned length); |
| |
| // Decode the string given in Base64 format |
| static bool Base64Decode(const std::string& base64Data, std::vector<unsigned char>& binaryData); |
| |
| private: |
| std::ostream& m_os; |
| |
| void StartSerialization() |
| { |
| m_os << "{"; |
| } |
| |
| void FinishSerialization() |
| { |
| m_os.seekp(-1, m_os.cur); // override the last comma |
| m_os << "}"; |
| } |
| }; |
| |
| #endif // _11AD_JSON_SERIALIZE_HELPER_H_ |