Add caching versions infos

Add implementation to put/get versions
list to catalog client cache.
Implement versions infos cache tests.

Relates-To: OLPEDGE-1606

Signed-off-by: Liubov Didkivska <ext-liubov.didkivska@here.com>

Author: Liubov Didkivska

olp-cpp-sdk-dataservice-read/src/generated/parser/JsonParserCacheValue.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2020 HERE Europe B.V.
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+#pragma once
+
+#include <olp/core/cache/KeyValueCache.h>
+#include <rapidjson/document.h>
+
+namespace olp {
+namespace parser {
+template <typename T>
+inline T parse(const cache::KeyValueCache::ValueType& cached_json) {
+  rapidjson::Document doc;
+  T result{};
+  if (!cached_json.empty() && cached_json.back() == '\0') {
+    doc.Parse(reinterpret_cast<const char*>(cached_json.data()));
+    if (doc.IsObject() || doc.IsArray()) {
+      from_json(doc, result);
+    }
+  }
+  return result;
+}
+
+}  // namespace parser
+}  // namespace olp

olp-cpp-sdk-dataservice-read/src/repositories/CatalogCacheRepository.cpp

@@ -30,6 +30,7 @@
 #include "generated/parser/CatalogParser.h"
 #include "generated/parser/VersionInfosParser.h"
 #include "generated/parser/VersionResponseParser.h"
+#include "generated/parser/JsonParserCacheValue.h"
 #include <olp/core/generated/parser/JsonParser.h>
 #include "generated/serializer/CatalogSerializer.h"
 #include "generated/serializer/VersionResponseSerializer.h"
@@ -127,9 +128,9 @@ void CatalogCacheRepository::PutVersionInfos(
   OLP_SDK_LOG_DEBUG_F(kLogTag, "PutVersionInfos -> '%s'", key.c_str());
   auto list_versions = olp::serializer::serialize(versions);
 
-  auto versions_data = std::make_shared<std::vector<unsigned char>>(
-      std::begin(list_versions), std::end(list_versions));
-
+  // include null terminated symbol
+  auto versions_data = std::make_shared<cache::KeyValueCache::ValueType>(
+      list_versions.data(), list_versions.data() + list_versions.size() + 1);
   cache_->Put(VersionInfosKey(hrn, start, end), versions_data, default_expiry_);
 }
 
@@ -144,8 +145,7 @@ boost::optional<model::VersionInfos> CatalogCacheRepository::GetVersionInfos(
     return boost::none;
   }
 
-  auto list_versions = std::string(value->begin(), value->end());
-  return parser::parse<model::VersionInfos>(list_versions);
+  return parser::parse<model::VersionInfos>(*value);
 }
 
 void CatalogCacheRepository::Clear() {