src/Tizen.Maps/Tizen.Maps/GeocodeRequest.cs

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
   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 using System;
  18 using System.Collections.Generic;
  19
  20 namespace Tizen.Maps
  21 {
  22     /// <summary>
  23     /// Geocode request for map service
  24     /// </summary>
  25     /// <since_tizen>3</since_tizen>
  26     public class GeocodeRequest : MapServiceRequest<Geocoordinates>
  27     {
  28         private Interop.GeocodeCallback _geocodeCallback;
  29         private List<Geocoordinates> _coordinateList = new List<Geocoordinates>();
  30
  31         internal GeocodeRequest(MapService service, string address) : this(service, ServiceRequestType.Geocode)
  32         {
  33             startExecutionAction = new Action(() =>
  34             {
  35                 int requestID;
  36                 errMessage = $"Failed to get coordinates for given address {address}";
  37                 errorCode = _service.handle.Geocode(address, _service.Preferences.handle, _geocodeCallback, IntPtr.Zero, out requestID);
  38                 if (errorCode.IsFailed() && errorCode != Interop.ErrorCode.Canceled)
  39                 {
  40                     _requestTask?.TrySetException(errorCode.GetException(errMessage));
  41                 }
  42                 _requestID = requestID;
  43             });
  44         }
  45
  46         internal GeocodeRequest(MapService service, string address, Area boundry) : this(service, ServiceRequestType.GeocodeInsideArea)
  47         {
  48             startExecutionAction = new Action(() =>
  49             {
  50                 int requestID;
  51                 errMessage = $"Failed to get coordinates for given address {address}";
  52                 errorCode = _service.handle.GeocodeInsideArea(address, boundry.handle, _service.Preferences.handle, _geocodeCallback, IntPtr.Zero, out requestID);
  53                 if (errorCode.IsFailed() && errorCode != Interop.ErrorCode.Canceled)
  54                 {
  55                     _requestTask?.TrySetException(errorCode.GetException(errMessage));
  56                 }
  57                 _requestID = requestID;
  58             });
  59         }
  60
  61         internal GeocodeRequest(MapService service, PlaceAddress address) : this(service, ServiceRequestType.GeocodeByStructuredAddress)
  62         {
  63             startExecutionAction = new Action(() =>
  64             {
  65                 int requestID;
  66                 errMessage = $"Failed to get coordinates for given address {address}";
  67                 errorCode = _service.handle.GeocodeByStructuredAddress(address.handle, _service.Preferences.handle, _geocodeCallback, IntPtr.Zero, out requestID);
  68                 if (errorCode.IsFailed() && errorCode != Interop.ErrorCode.Canceled)
  69                 {
  70                     _requestTask?.TrySetException(errorCode.GetException(errMessage));
  71                 }
  72                 _requestID = requestID;
  73             });
  74         }
  75
  76         private GeocodeRequest(MapService service, ServiceRequestType type) : base(service, type)
  77         {
  78             // The Maps Service invokes this callback while iterating through the list of obtained coordinates of the specified place.
  79             _geocodeCallback = (result, id, index, total, coordinates, userData) =>
  80             {
  81                 errorCode = result;
  82                 if (result.IsSuccess())
  83                 {
  84                     // The parameter coordinates must be released using maps_coordinates_destroy()
  85                     var coordinatesHandle = new Interop.CoordinatesHandle(coordinates, needToRelease: true);
  86                     _coordinateList.Add(new Geocoordinates(coordinatesHandle));
  87                     if (_coordinateList.Count == total)
  88                     {
  89                         _requestTask?.TrySetResult(_coordinateList);
  90                     }
  91                     return true;
  92                 }
  93                 else
  94                 {
  95                     // If search is failed, the value of total is 0 and coordinates is NULL
  96                     _requestTask?.TrySetException(result.GetException(errMessage));
  97                     return false;
  98                 }
  99             };
 100         }
 101     }
 102 }