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diff --git a/policy_manager/policy_manager.hpp b/policy_manager/policy_manager.hpp
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+/*
+ * Copyright (c) 2018 TOYOTA MOTOR CORPORATION
+ *
+ * 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 TMCAGLWM_POLICY_MANAGER_HPP
+#define TMCAGLWM_POLICY_MANAGER_HPP
+
+#include <functional>
+#include <unordered_map>
+#include <vector>
+#include <queue>
+
+struct json_object;
+struct sd_event;
+struct sd_event_source;
+struct StmState;
+
+class PolicyManager
+{
+  public:
+    explicit PolicyManager();
+    ~PolicyManager() = default;
+
+    using Handler = std::function<void(json_object *)>;
+
+    typedef struct
+    {
+        Handler onStateTransitioned;
+        Handler onError;
+    } CallbackTable;
+
+    int initialize();
+    void registerCallback(CallbackTable callback_table);
+    int setInputEventData(json_object *json_in);
+    int executeStateTransition();
+    void undoState();
+
+    // Do not use these functions
+    int transitionState(sd_event_source *source, void *data);
+    int timerEvent(sd_event_source *source, uint64_t usec, void *data);
+
+  private:
+    // Disable copy and move
+    PolicyManager(PolicyManager const &) = delete;
+    PolicyManager &operator=(PolicyManager const &) = delete;
+    PolicyManager(PolicyManager &&) = delete;
+    PolicyManager &operator=(PolicyManager &&) = delete;
+
+    typedef struct EventInfo
+    {
+        int event;
+        std::string role;
+        uint64_t delay;
+    } EventInfo;
+
+    typedef struct AreaState
+    {
+        std::string name;
+        std::string category;
+        std::string role;
+    } AreaState;
+
+    typedef std::vector<AreaState> AreaList;
+    typedef struct LayoutState
+    {
+        std::string name;
+        std::map<std::string, int> category_num;
+        AreaList area_list;
+    } LayoutState;
+
+    typedef struct LayerState
+    {
+        std::string name;
+        LayoutState layout_state;
+        bool changed;
+    } LayerState;
+
+    typedef std::vector<std::string> Areas;
+    typedef std::vector<std::string> Categories;
+    typedef std::vector<std::string> Roles;
+
+    // Convert map
+    std::unordered_map<std::string, int> eventname2no;
+    std::unordered_map<std::string, int> categoryname2no;
+    std::unordered_map<std::string, int> areaname2no;
+
+    std::unordered_map<std::string, std::string> role2category;
+    std::unordered_map<std::string, std::string> category2role;
+    std::unordered_map<std::string, Areas>       category2areas;
+    std::unordered_map<std::string, Categories>  layer2categories;
+
+    std::queue<EventInfo> event_info_queue;
+    std::map<int, struct sd_event_source *> event_source_list;
+    std::map<int, std::string> req_role_list;
+
+    CallbackTable callback;
+
+    std::unordered_map<std::string, LayerState> prv_layers;
+    std::unordered_map<std::string, LayerState> crr_layers;
+
+    std::unordered_map<std::string, LayoutState> default_layouts;
+
+    std::map<std::string, Roles> invisible_role_history;
+
+    void initializeState();
+    void initializeLayerState();
+    void updateState(int event_id, StmState crr_state);
+    void updateLayer(int event_id, StmState crr_state);
+    int updateLayout(int event_id, int layer_no,
+                     std::string crr_layout_name, LayoutState &crr_layout_state);
+    void createOutputInformation(StmState crr_state, json_object **json_out);
+    int setStateTransitionProcessToSystemd(int event, uint64_t delay_ms, std::string role);
+
+    void pushInvisibleRoleHistory(std::string category, std::string role);
+    std::string popInvisibleRoleHistory(std::string category);
+
+    int loadRoleDb();
+    int loadStateDb();
+
+    void dumpLayerState(std::unordered_map<std::string, LayerState> &layers);
+    void dumpInvisibleRoleHistory();
+
+    void addStateToJson(const char *name, bool changed,
+                        std::string state, json_object **json_out);
+    void addStateToJson(const char *layer_name, bool changed,
+                        AreaList area_list, json_object **json_out);
+    const char *getStringFromJson(json_object *obj, const char *key);
+    int inputJsonFilie(const char *file, json_object **obj);
+
+    std::vector<std::string> parseString(std::string str, char delimiter);
+    std::string deleteSpace(std::string str);
+
+    static const char *kDefaultRoleDb;
+    static const char *kDefaultStateDb;
+};
+
+#endif // TMCAGLWM_POLICY_MANAGER_HPP