Add config loader

core/common/config.cpp

@@ -0,0 +1,67 @@
+/*
+Copyright Soramitsu Co., Ltd. 2016 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.
+*/
+
+#ifndef __RANDOM_HPP_
+#define __RANDOM_HPP_
+
+#include "config.hpp"
+
+#include <random>
+#include <fstream>
+
+namespace common {
+
+    namespace config {
+        using namespace rapidjson;
+
+        ConfigLoader::ConfigLoader(const std::string& file_name){
+            std::ifstream ifs(file_name);
+            if(ifs.is_open()){
+                IStreamWrapper isw(ifs);
+                doc.ParseStream(isw);
+                if(doc.HasParseError()){
+                    throw std::runtime_error("parse error");
+                }
+            }
+        }
+
+        int ConfigLoader::getIntOrElse(const std::string& key, int def){
+            if(doc[key.c_str()].IsInt()){
+                return doc[key.c_str()].GetInt();
+            }else{
+                return def;
+            };
+        }
+
+        std::string ConfigLoader::getStringOrElse(const std::string& key, std::string def){
+            if(doc[key.c_str()].IsString()){
+                return doc[key.c_str()].GetString();
+            }else{
+                return def;
+            };
+        }
+
+        bool ConfigLoader::getBoolOrElse(const std::string& key, bool def){
+            if(doc[key.c_str()].IsBool()){
+                return doc[key.c_str()].GetBool();
+            }else{
+                return def;
+            };
+        }
+    };
+};  // namespace common
+
+#endif

core/common/config.hpp

@@ -0,0 +1,45 @@
+/*
+Copyright Soramitsu Co., Ltd. 2016 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.
+*/
+
+#ifndef __COMMON_CONFIG_HPP_
+#define __COMMON_CONFIG_HPP_
+
+#include <rapidjson/document.h>
+#include <rapidjson/stringbuffer.h>
+#include <rapidjson/istreamwrapper.h>
+
+#include <string>
+
+namespace common {
+
+    namespace config {
+
+        using namespace rapidjson;
+
+        class ConfigLoader{
+            Document doc;
+        public:
+            ConfigLoader(const std::string& file);
+
+            int getIntOrElse(const std::string& key, int def);
+            std::string getStringOrElse(const std::string& key, std::string def);
+            bool getBoolOrElse(const std::string& key, bool def);
+
+        };
+    };
+};  // namespace common
+
+#endif // __COMMON_CONFIG_HPP_