Download a preplanned map area

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
/* Copyright 2019 Esri
 *
 * 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.
 *
 */

package com.esri.samples.download_preplanned_map;

import com.esri.arcgisruntime.ArcGISRuntimeException;
import com.esri.arcgisruntime.concurrent.Job;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.FeatureTable;
import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.GeometryEngine;
import com.esri.arcgisruntime.layers.Layer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.portal.Portal;
import com.esri.arcgisruntime.portal.PortalItem;
import com.esri.arcgisruntime.security.AuthenticationManager;
import com.esri.arcgisruntime.security.DefaultAuthenticationChallengeHandler;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;
import com.esri.arcgisruntime.tasks.offlinemap.*;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.fxml.FXML;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;

public class DownloadPreplannedMapController {

  @FXML private ListView<PreplannedMapArea> preplannedAreasListView;
  @FXML private ListView<DownloadPreplannedOfflineMapJob> downloadJobsListView;
  @FXML private MapView mapView;
  @FXML private Button downloadButton;

  private ArcGISMap onlineMap;
  private GraphicsOverlay areasOfInterestGraphicsOverlay;
  private OfflineMapTask offlineMapTask;
  private List<PreplannedMapArea> preplannedMapAreas; // keep loadable in scope to avoid garbage collection

  @FXML
  private void initialize() {
    try {

      // create a portal to ArcGIS Online
      Portal portal = new Portal("https://www.arcgis.com/");

      // set the authentication manager to handle OAuth challenges when accessing the portal
      AuthenticationManager.setAuthenticationChallengeHandler(new DefaultAuthenticationChallengeHandler());

      // create a portal item using the portal and the item id of a map service
      PortalItem portalItem = new PortalItem(portal, "acc027394bc84c2fb04d1ed317aac674");

      // create a map with the portal item
      onlineMap = new ArcGISMap(portalItem);

      // show the map
      mapView.setMap(onlineMap);

      // create a graphics overlay to show the preplanned map areas extents (areas of interest)
      areasOfInterestGraphicsOverlay = new GraphicsOverlay();
      mapView.getGraphicsOverlays().add(areasOfInterestGraphicsOverlay);

      // create a red outline to mark the areas of interest of the preplanned map areas
      SimpleLineSymbol areaOfInterestLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0x80FF0000, 5.0f);
      SimpleRenderer areaOfInterestRenderer = new SimpleRenderer();
      areaOfInterestRenderer.setSymbol(areaOfInterestLineSymbol);
      areasOfInterestGraphicsOverlay.setRenderer(areaOfInterestRenderer);

      // create an offline map task for the portal item
      offlineMapTask = new OfflineMapTask(portalItem);

      // use a cell factory which shows the preplanned area's title
      preplannedAreasListView.setCellFactory(c -> new PreplannedMapAreaListCell());

      // get the preplanned map areas from the offline map task and show them in the list view
      ListenableFuture<List<PreplannedMapArea>> preplannedMapAreasFuture = offlineMapTask.getPreplannedMapAreasAsync();
      preplannedMapAreasFuture.addDoneListener(() -> {
        try {
          // get the preplanned areas and add them to the list view
          preplannedMapAreas = preplannedMapAreasFuture.get();
          preplannedAreasListView.getItems().addAll(preplannedMapAreas);

          // load each area and show a red border around their area of interest
          preplannedMapAreas.forEach(preplannedMapArea -> {
            preplannedMapArea.loadAsync();
            preplannedMapArea.addDoneLoadingListener(() -> {
              if (preplannedMapArea.getLoadStatus() == LoadStatus.LOADED) {
                areasOfInterestGraphicsOverlay.getGraphics().add(new Graphic(preplannedMapArea.getAreaOfInterest()));
              } else {
                new Alert(Alert.AlertType.ERROR, "Failed to load preplanned map area").show();
              }
            });
          });

        } catch (InterruptedException | ExecutionException e) {
          new Alert(Alert.AlertType.ERROR, "Failed to get the Preplanned Map Areas from the Offline Map Task.").show();
        }
      });


      preplannedAreasListView.getSelectionModel().selectedItemProperty().addListener((o, p, n) -> {
        PreplannedMapArea selectedPreplannedMapArea = preplannedAreasListView.getSelectionModel().getSelectedItem();
        if (selectedPreplannedMapArea != null) {

          // clear the download jobs list view selection
          downloadJobsListView.getSelectionModel().clearSelection();

          // show the online map with the areas of interest
          mapView.setMap(onlineMap);
          areasOfInterestGraphicsOverlay.setVisible(true);

          // set the viewpoint to the preplanned map area's area of interest
          Envelope areaOfInterest = GeometryEngine.buffer(selectedPreplannedMapArea.getAreaOfInterest(), 100).getExtent();
          mapView.setViewpointAsync(new Viewpoint(areaOfInterest), 0.5f);
        }
      });

      // disable the download button when no area is selected
      downloadButton.disableProperty().bind(preplannedAreasListView.getSelectionModel().selectedItemProperty().isNull());

      // use a cell factory which shows the download preplanned offline map job's progress and title
      downloadJobsListView.setCellFactory(c -> new DownloadPreplannedOfflineMapJobListCell());

      ChangeListener<DownloadPreplannedOfflineMapJob> selectedDownloadChangeListener = new ChangeListener<>() {
        @Override
        public void changed(ObservableValue<? extends DownloadPreplannedOfflineMapJob> observable, DownloadPreplannedOfflineMapJob oldValue, DownloadPreplannedOfflineMapJob newValue) {
          DownloadPreplannedOfflineMapJob selectedJob = downloadJobsListView.getSelectionModel().getSelectedItem();
          if (selectedJob != null) {

            // hide the preplanned map areas and clear the preplanned area list view's selection
            areasOfInterestGraphicsOverlay.setVisible(false);
            preplannedAreasListView.getSelectionModel().clearSelection();

            if (selectedJob.getStatus() == Job.Status.SUCCEEDED) {
              DownloadPreplannedOfflineMapResult result = selectedJob.getResult();

              // check if the result has errors
              if (result.hasErrors()) {

                // collect the layer and table errors into a single alert message
                StringBuilder stringBuilder = new StringBuilder("Errors: ");

                Map<Layer, ArcGISRuntimeException> layerErrors = result.getLayerErrors();
                layerErrors.forEach((layer, exception) ->
                        stringBuilder.append("Layer: ").append(layer.getName()).append(". Exception: ").append(exception.getMessage()).append(". ")
                );

                Map<FeatureTable, ArcGISRuntimeException> tableError = result.getTableErrors();
                tableError.forEach((table, exception) ->
                        stringBuilder.append("Table: ").append(table.getTableName()).append(". Exception: ").append(exception.getMessage()).append(". ")
                );

                new Alert(Alert.AlertType.ERROR, "One or more errors occurred with the Offline Map Result: " + stringBuilder.toString()).show();
              } else {
                mapView.addNavigationChangedListener(listener -> {
                  // if the mapview is navigating to a new pleplanned map area, wait for it to finish
                  if (!listener.isNavigating()) {
                    // show the offline map in the map view
                    ArcGISMap downloadOfflineMap = result.getOfflineMap();
                    mapView.setMap(downloadOfflineMap);
                  }
                });
              }

            } else {
              // alert the user the job is still in progress if selected before the job is done
              new Alert(Alert.AlertType.WARNING, "Job status: " + selectedJob.getStatus()).show();

              // when the job is done, re-trigger the listener to show the job's result if it is still selected
              selectedJob.addJobDoneListener(() ->
                this.changed(observable, oldValue, downloadJobsListView.getSelectionModel().getSelectedItem())
              );
            }
          }
        }
      };

      downloadJobsListView.getSelectionModel().selectedItemProperty().addListener(selectedDownloadChangeListener);

    } catch (Exception e) {
      // on any exception, print the stacktrace
      e.printStackTrace();
    }
  }

  /**
   * Download the selected preplanned map area from the list view to a temporary directory. The download job is tracked in another list view.
   */
  @FXML
  private void handleDownloadPreplannedAreaButtonClicked() {
    PreplannedMapArea selectedMapArea = preplannedAreasListView.getSelectionModel().getSelectedItem();
    if (selectedMapArea != null) {

      // hide the preplanned areas and clear the selection
      preplannedAreasListView.getSelectionModel().clearSelection();

      // create default download parameters from the offline map task
      ListenableFuture<DownloadPreplannedOfflineMapParameters> downloadPreplannedOfflineMapParametersFuture = offlineMapTask.createDefaultDownloadPreplannedOfflineMapParametersAsync(selectedMapArea);
      downloadPreplannedOfflineMapParametersFuture.addDoneListener(() -> {
        try {
          DownloadPreplannedOfflineMapParameters downloadPreplannedOfflineMapParameters = downloadPreplannedOfflineMapParametersFuture.get();

          // set the update mode to not receive updates
          downloadPreplannedOfflineMapParameters.setUpdateMode(PreplannedUpdateMode.NO_UPDATES);

          // create a job to download the preplanned offline map to a temporary directory
          Path path = Files.createTempDirectory(selectedMapArea.getPortalItem().getTitle());
          path.toFile().deleteOnExit();
          DownloadPreplannedOfflineMapJob downloadPreplannedOfflineMapJob = offlineMapTask.downloadPreplannedOfflineMap(downloadPreplannedOfflineMapParameters, path.toFile().getAbsolutePath());

          // start the job
          downloadPreplannedOfflineMapJob.start();

          // track the job in the second list view
          downloadJobsListView.getItems().add(downloadPreplannedOfflineMapJob);

        } catch (InterruptedException | ExecutionException e) {
          new Alert(Alert.AlertType.ERROR, "Failed to generate default parameters for the download job.").show();
        } catch(IOException e) {
          new Alert(Alert.AlertType.ERROR, "Failed to create a temporary directory for the download").show();
        }
      });
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  void terminate() {

    if (mapView != null) {
      mapView.dispose();
    }
  }

}