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
/*
* Copyright 2017 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.closest_facility;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
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.symbology.PictureMarkerSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityParameters;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityResult;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityRoute;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityTask;
import com.esri.arcgisruntime.tasks.networkanalysis.Facility;
import com.esri.arcgisruntime.tasks.networkanalysis.Incident;
public class ClosestFacilitySample extends Application {
// black cross were user clicked
private Point incidentPoint;
private GraphicsOverlay facilityGraphicsOverlay;
private GraphicsOverlay incidentGraphicsOverlay;
// holds locations of hospitals around San Diego
private List<Facility> facilities;
private MapView mapView;
// solves task to find closest route between an incident and a facility
private ClosestFacilityTask task;
// parameters needed to solve for route
private ClosestFacilityParameters closestFacilityParameters;
// used to display route between incident and facility to mapview
private SimpleLineSymbol routeSymbol;
// same spatial reference of the map
private final SpatialReference spatialReference = SpatialReferences.getWebMercator();
@Override
public void start(Stage stage) {
// pane will hold mapview to be displayed on application
StackPane stackPane = new StackPane();
Scene scene = new Scene(stackPane);
// set title, size, and add scene to stage
stage.setTitle("Closest Facility Sample");
stage.setWidth(800);
stage.setHeight(700);
stage.setScene(scene);
stage.show();
try {
// authentication with an API key or named user is required to access basemaps and other location services
String yourAPIKey = System.getProperty("apiKey");
ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);
// create a map with the streets basemap style
ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS);
// create a map view and set the map to it
mapView = new MapView();
mapView.setMap(map);
// add the map view to stack pane
stackPane.getChildren().addAll(mapView);
// set a viewpoint on the map view to be over San Diego
mapView.setViewpoint(new Viewpoint(32.727, -117.1750, 40000));
facilityGraphicsOverlay = new GraphicsOverlay();
incidentGraphicsOverlay = new GraphicsOverlay();
createFacilitiesAndGraphics();
// to load graphics faster, add graphics overlay to view once all graphics are in graphics overlay
mapView.getGraphicsOverlays().add(facilityGraphicsOverlay);
mapView.getGraphicsOverlays().add(incidentGraphicsOverlay);
// task to find the closest route between an incident and a facility
final String sanDiegoRegion =
"https://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/NAServer/ClosestFacility";
task = new ClosestFacilityTask(sanDiegoRegion);
task.addDoneLoadingListener(() -> {
if (task.getLoadStatus() == LoadStatus.LOADED) {
try {
closestFacilityParameters = task.createDefaultParametersAsync().get();
// set new parameters to find route
closestFacilityParameters.setFacilities(facilities);
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
} else {
Alert alert = new Alert(Alert.AlertType.ERROR, "Closest Facility Task Failed to Load!");
alert.show();
}
});
task.loadAsync();
// symbols that display incident (black cross) and route (blue line) to view
SimpleMarkerSymbol incidentSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CROSS, Color.BLACK, 20);
routeSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 2.0f);
// place incident were user clicks and display route to closest facility
mapView.setOnMouseClicked(e -> {
// check that the primary mouse button was clicked
if (e.getButton() == MouseButton.PRIMARY && e.isStillSincePress()) {
// remove last incident from view
incidentGraphicsOverlay.getGraphics().clear();
// show incident to the mapview
Point mapPoint = mapView.screenToLocation(new Point2D(e.getX(), e.getY()));
incidentPoint = new Point(mapPoint.getX(), mapPoint.getY(), spatialReference);
Graphic graphic = new Graphic(incidentPoint, incidentSymbol);
incidentGraphicsOverlay.getGraphics().add(graphic);
populateParametersAndSolveRoute();
}
});
} catch (Exception e) {
// on any error, display the stack trace.
e.printStackTrace();
}
}
/**
* Creates facilities around the San Diego region.
* <p>
* Facilities are created using point geometry which is then used to make graphics for the graphics overlay.
*/
private void createFacilitiesAndGraphics() {
// List of facilities to be placed around San Diego area
facilities = Arrays.asList(
new Facility(new Point(-1.3042129900625112E7, 3860127.9479775648, spatialReference)),
new Facility(new Point(-1.3042193400557665E7, 3862448.873041752, spatialReference)),
new Facility(new Point(-1.3046882875518233E7, 3862704.9896770366, spatialReference)),
new Facility(new Point(-1.3040539754780494E7, 3862924.5938606677, spatialReference)),
new Facility(new Point(-1.3042571225655518E7, 3858981.773018156, spatialReference)),
new Facility(new Point(-1.3039784633928463E7, 3856692.5980474586, spatialReference)),
new Facility(new Point(-1.3049023883956768E7, 3861993.789732541, spatialReference)));
// image for displaying facility
String facilityUrl = "https://static.arcgis.com/images/Symbols/SafetyHealth/Hospital.png";
PictureMarkerSymbol facilitySymbol = new PictureMarkerSymbol(facilityUrl);
facilitySymbol.setHeight(30);
facilitySymbol.setWidth(30);
// for each facility, create a graphic and add to graphics overlay
facilities.stream().map(f -> new Graphic(f.getGeometry(), facilitySymbol))
.collect(Collectors.toCollection(() -> facilityGraphicsOverlay.getGraphics()));
}
/**
* Adds facilities(hospitals) and user's incident(black cross) to closest facility parameters which will be used to
* display the closest route from the user's incident to its' nearest facility.
*/
private void populateParametersAndSolveRoute() {
closestFacilityParameters.setIncidents(Collections.singletonList(new Incident(incidentPoint)));
// find closest route using parameters from above
ListenableFuture<ClosestFacilityResult> result = task.solveClosestFacilityAsync(closestFacilityParameters);
result.addDoneListener(() -> {
try {
ClosestFacilityResult facilityResult = result.get();
// a list of closest facilities based on users incident
List<Integer> rankedList = facilityResult.getRankedFacilityIndexes(0);
// get the index of the closest facility to incident
int closestFacility = rankedList.get(0);
// get route from incident to closest facility and display to mapview
ClosestFacilityRoute route = facilityResult.getRoute(closestFacility, 0);
incidentGraphicsOverlay.getGraphics().add(new Graphic(route.getRouteGeometry(), routeSymbol));
} catch (ExecutionException e) {
if (e.getMessage().contains("Unable to complete operation")) {
Alert dialog = new Alert(AlertType.WARNING);
dialog.setHeaderText(null);
dialog.setTitle("Route Error");
dialog.setContentText("Incident not within San Diego area!");
dialog.showAndWait();
} else {
e.printStackTrace();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
});
}
/**
* Stops and releases all resources used in application.
*/
@Override
public void stop() {
if (mapView != null) {
mapView.dispose();
}
}
/**
* Opens and runs application.
*
* @param args arguments passed to this application
*/
public static void main(String[] args) {
Application.launch(args);
}
}
