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/*
* 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.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, 0xFF000000, 20);
routeSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFF0000FF, 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);
}
}
