Identify layers

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 /*  * Copyright 2018 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.identify_layers;  import java.util.List; import java.util.concurrent.ExecutionException;  import com.esri.arcgisruntime.ArcGISRuntimeEnvironment; import com.esri.arcgisruntime.concurrent.ListenableFuture; import com.esri.arcgisruntime.data.FeatureTable; import com.esri.arcgisruntime.data.ServiceFeatureTable; import com.esri.arcgisruntime.layers.ArcGISMapImageLayer; import com.esri.arcgisruntime.layers.FeatureLayer; 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.IdentifyLayerResult; import com.esri.arcgisruntime.mapping.view.MapView; import javafx.application.Application; import javafx.geometry.Point2D; import javafx.scene.Scene; import javafx.scene.control.Alert; import javafx.scene.input.MouseButton; import javafx.scene.layout.StackPane; import javafx.stage.Stage;  public class IdentifyLayersSample extends Application {   private MapView mapView;  // keep loadables in scope to avoid garbage collection  private ArcGISMapImageLayer mapImageLayer;  private FeatureLayer featureLayer;   /**  * Opens and runs application.  *  * @param args arguments passed to this application  */  public static void main(String[] args) {   Application.launch(args);  }   @Override  public void start(Stage stage) {   try {  // create stack pane and application scene  StackPane stackPane = new StackPane();  Scene scene = new Scene(stackPane);   // set title, size, and add scene to stage  stage.setTitle("Identify Layers Sample");  stage.setWidth(800);  stage.setHeight(700);  stage.setScene(scene);  stage.show();   // 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 topographic basemap style  ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);   // create a map view and set the map to it  mapView = new MapView();  mapView.setMap(map);   // set a viewpoint on the map view  mapView.setViewpoint(new Viewpoint(40.26684, -100.98579, 68015210));   // add a map image layer with one sublayer visible  mapImageLayer = new ArcGISMapImageLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer");  mapImageLayer.addDoneLoadingListener(() -> {  if (mapImageLayer.getLoadStatus() == LoadStatus.LOADED) {  // hide Continent and World layers  mapImageLayer.getSubLayerContents().get(1).setVisible(false);  mapImageLayer.getSubLayerContents().get(2).setVisible(false);  } else {  new Alert(Alert.AlertType.ERROR, "Failed to load the map image layer").show();  }  });  map.getOperationalLayers().add(mapImageLayer);   // add a feature layer to the map's operational layers  FeatureTable featureTable = new ServiceFeatureTable("https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0");  featureLayer = new FeatureLayer(featureTable);  featureLayer.addDoneLoadingListener(() -> {  if (mapImageLayer.getLoadStatus() != LoadStatus.LOADED) {  new Alert(Alert.AlertType.ERROR, "Failed to load the feature layer").show();  }  });  map.getOperationalLayers().add(featureLayer);   // create map view click listener  mapView.setOnMouseClicked(e -> {  if (e.isStillSincePress() && e.getButton() == MouseButton.PRIMARY) {   // identify layers with GeoElements where the user clicked  Point2D point2D = new Point2D(e.getX(), e.getY());  ListenableFuture<List<IdentifyLayerResult>> identifyResults = mapView.identifyLayersAsync(point2D, 12, false, 10);  identifyResults.addDoneListener(() -> {  try {  // build a string with the total count of identified GeoElements for each layer  StringBuilder resultsList = new StringBuilder();  List<IdentifyLayerResult> results = identifyResults.get();  // for each result layer, recursively search its sublayers to get the total count of GeoElements  for (IdentifyLayerResult result : results) {  int recursiveGeoElementCount = searchGeoElements(result);  resultsList.append(result.getLayerContent().getName()).append(": ").append(recursiveGeoElementCount).append("\n");  }  // show the result counts string in a dialog  String resultString = resultsList.toString();  Alert alert = new Alert(Alert.AlertType.INFORMATION, resultString.equals("") ? "No Results" : resultString);  alert.initOwner(mapView.getScene().getWindow());  alert.show();  } catch (InterruptedException | ExecutionException ex) {  new Alert(Alert.AlertType.ERROR, "Failed to identify layers").show();  }  });  }  });   // add the map view to stack pane  stackPane.getChildren().add(mapView);  } catch (Exception e) {  // on any error, display the stack trace.  e.printStackTrace();  }  }   /**  * Searches an identify layer result recursively to find the identified GeoElements for all identified sublayers.  *  * @param layerResult identify layer result  * @return recursive identified GeoElements count  */  private int searchGeoElements(IdentifyLayerResult layerResult) {  int identifiedSubLayerGeoElements = 0;  for (IdentifyLayerResult subLayerResult : layerResult.getSublayerResults()) {  identifiedSubLayerGeoElements += searchGeoElements(subLayerResult);  }  return layerResult.getElements().size() + identifiedSubLayerGeoElements;  }   /**  * Stops and releases all resources used in application.  */  @Override  public void stop() {   if (mapView != null) {  mapView.dispose();  }  }  }