src/ProviderHandler.h

   1 /*
   2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef _CONTEXT_PROVIDER_HANDLER_H_
  18 #define _CONTEXT_PROVIDER_HANDLER_H_
  19
  20 #include <string>
  21 #include <list>
  22 #include <map>
  23 #include <ContextProvider.h>
  24 #include "ProviderLoader.h"
  25
  26 namespace ctx {
  27
  28         class Credentials;
  29         class RequestInfo;
  30
  31         class ProviderHandler {
  32                 typedef std::list<RequestInfo*> RequestList;
  33                 typedef std::map<std::string, ProviderHandler*> InstanceMap;
  34
  35         public:
  36                 bool isSupported();
  37                 bool isAllowed(const Credentials *creds);
  38
  39                 void subscribe(RequestInfo *request);
  40                 void unsubscribe(RequestInfo *request);
  41                 void read(RequestInfo *request);
  42                 void write(RequestInfo *request);
  43
  44                 bool publish(ctx::Json &option, int error, ctx::Json &dataUpdated);
  45                 bool replyToRead(ctx::Json &option, int error, ctx::Json &dataRead);
  46
  47                 static ProviderHandler* getInstance(const char *subject, bool force);
  48                 static void purge();
  49
  50         private:
  51                 const char *__subject;
  52                 ContextProvider *__provider;
  53                 RequestList __subscribeRequests;
  54                 RequestList __readRequests;
  55                 ProviderLoader __loader;
  56
  57                 static InstanceMap __instanceMap;
  58
  59                 ProviderHandler(const char *subject);
  60                 ~ProviderHandler();
  61
  62                 bool __loadProvider();
  63                 RequestList::iterator __findRequest(RequestList &reqList, Json &option);
  64                 RequestList::iterator __findRequest(RequestList &reqList, std::string client, int reqId);
  65                 RequestList::iterator __findRequest(RequestList::iterator begin, RequestList::iterator end, Json &option);
  66
  67         };      /* class ProviderHandler */
  68
  69 }       /* namespace ctx */
  70
  71 #endif  /* _CONTEXT_PROVIDER_HANDLER_H_ */