Update attributes

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Update feature attributes in an online feature service.
Image of update attributes feature service
Use case

Online feature services can be updated with new data. This is useful for updating existing data in real time while working in the field.
How to use the sample

To change the feature's damage property, click on the feature to select it, and update the damage type using the drop down.
How it works

Create and load a ServiceGeodatabase with a feature service URL.
Get the ServiceFeatureTable from the service geodatabase.
Create a FeatureLayer from the service feature table.
Select features from the FeatureLayer.
To update the feature's attribute, first load it, then use .getAttributes().put(keyValuePair) to modify the desired attribute.
Update the feature table with .updateFeatureAsync(feature).
Apply edits to the ServiceGeodatabase by calling applyEditsAsync, which will update the feature on the online service.
Relevant API

ArcGISFeature
FeatureLayer
ServiceFeatureTable
ServiceGeodatabase
Sample Code

UpdateAttributesSample.java
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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.update_attributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.geometry.Point2D;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Paint;
import javafx.stage.Stage;

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.ArcGISFeature;
import com.esri.arcgisruntime.data.FeatureTableEditResult;
import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.data.ServiceGeodatabase;
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.GeoElement;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.IdentifyLayerResult;
import com.esri.arcgisruntime.mapping.view.MapView;

public class UpdateAttributesSample extends Application {

  private ArcGISFeature identifiedFeature;
  private ServiceFeatureTable featureTable;
  private FeatureLayer featureLayer;
  private MapView mapView;

  private ComboBox<String> comboBox;

  private static final String FEATURE_LAYER_URL =
    "https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer";

  @Override
  public void start(Stage stage) {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene scene = new Scene(stackPane);
      scene.getStylesheets().add(getClass().getResource("/update_attributes/style.css").toExternalForm());

      // size the stage, add a title, and set scene to stage
      stage.setTitle("Update Attributes Sample");
      stage.setHeight(700);
      stage.setWidth(800);
      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 control panel
      VBox controlsVBox = new VBox(6);
      controlsVBox.setBackground(new Background(new BackgroundFill(Paint.valueOf("rgba(0,0,0,0.3)"), CornerRadii.EMPTY,
          Insets.EMPTY)));
      controlsVBox.setPadding(new Insets(10.0));
      controlsVBox.setMaxSize(180, 80);
      controlsVBox.getStyleClass().add("panel-region");

      // create damage type label
      Label typeDamageLabel = new Label("Damage type:");
      typeDamageLabel.getStyleClass().add("panel-label");

      // create list of damage types
      ObservableList<String> damageList = FXCollections.observableArrayList();
      damageList.add("Destroyed");
      damageList.add("Inaccessible");
      damageList.add("Major");
      damageList.add("Minor");
      damageList.add("Affected");

      // create combo box
      comboBox = new ComboBox<>(damageList);
      comboBox.setMaxWidth(Double.MAX_VALUE);
      comboBox.setDisable(true);

      // handle type damage selection
      comboBox.getSelectionModel().selectedItemProperty().addListener((o, p, n) -> {
        if (!identifiedFeature.getAttributes().get("typdamage").equals(n)) {
          try {
            updateAttributes(identifiedFeature);
          } catch (Exception e) {
            displayMessage("Cannot update attributes", e.getCause().getMessage());
          }
        }
      });

      // add damage type label and comboBox to the control panel
      controlsVBox.getChildren().addAll(typeDamageLabel, comboBox);

      // 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);

      // set a viewpoint on the map view
      mapView.setViewpoint(new Viewpoint(40, -95,36978595));

      // create a service geodatabase from the service layer url and load it
      var serviceGeodatabase = new ServiceGeodatabase(FEATURE_LAYER_URL);
      serviceGeodatabase.addDoneLoadingListener(() -> {

        // create a service feature table from the first layer on the service geodatabase's table
        featureTable = serviceGeodatabase.getTable(0);

        // create a feature layer from the feature table
        featureLayer = new FeatureLayer(featureTable);

        // add the layer to the ArcGISMap
        map.getOperationalLayers().add(featureLayer);

        // show alert if layer fails to load
        featureLayer.addDoneLoadingListener(()->{
          if (featureLayer.getLoadStatus() != LoadStatus.LOADED) {
            displayMessage("Error", "Error loading feature layer");
          }
        });

      });
      serviceGeodatabase.loadAsync();

      mapView.setOnMouseClicked(event -> {
        // accept only primary mouse click
        if (event.isStillSincePress() && event.getButton() == MouseButton.PRIMARY) {
          // create point from where user clicked
          Point2D point = new Point2D(event.getX(), event.getY());

          // clear any previous selection
          featureLayer.clearSelection();
          comboBox.setDisable(true);

          // get the clicked feature
          ListenableFuture<IdentifyLayerResult> results = mapView.identifyLayerAsync(featureLayer, point, 1, false);
          results.addDoneListener(() -> {
            try {
              IdentifyLayerResult layer = results.get();
              List<GeoElement> identified = layer.getElements();
              if (!identified.isEmpty()) {
                GeoElement element = identified.get(0);
                // get selected feature
                if (element instanceof ArcGISFeature) {
                  identifiedFeature = (ArcGISFeature) element;
                  featureLayer.selectFeature(identifiedFeature);
                  identifiedFeature.loadAsync();
                  identifiedFeature.addDoneLoadingListener(() -> {
                    if (identifiedFeature.getLoadStatus() == LoadStatus.LOADED) {
                      comboBox.getSelectionModel().select((String) identifiedFeature.getAttributes().get("typdamage"));
                    } else {
                      Alert alert = new Alert(Alert.AlertType.ERROR, "Element Failed to Load!");
                      alert.show();
                    }
                  });
                  comboBox.setDisable(false);
                }
              }
            } catch (InterruptedException | ExecutionException e) {
              displayMessage("Exception getting identify result", e.getCause().getMessage());
            }
          });
        }
      });

      // add the map view and control box to stack pane
      stackPane.getChildren().addAll(mapView, controlsVBox);
      StackPane.setAlignment(controlsVBox, Pos.TOP_LEFT);
      StackPane.setMargin(controlsVBox, new Insets(10, 0, 0, 10));

    } catch (Exception e) {
      // on any error, display the stack trace
      e.printStackTrace();
    }
  }

  /**
   * Applies changes to the feature, Service Feature Table, and server.
   */
  private void updateAttributes(ArcGISFeature feature) {

    if (featureTable.canUpdate(feature)) {
      // update attribute
      identifiedFeature.getAttributes().put("typdamage", comboBox.getValue());

      // update feature in the feature table
      ListenableFuture<Void> editResult = featureTable.updateFeatureAsync(feature);
      editResult.addDoneListener(() -> applyEdits(featureTable));
    } else {
      displayMessage(null, "Cannot update this feature.");
    }
  }

  /**
   * Sends any edits on the ServiceFeatureTable to the server.
   *
   * @param featureTable service feature table
   */
  private void applyEdits(ServiceFeatureTable featureTable) {

    // apply the changes to the server
    ListenableFuture<List<FeatureTableEditResult>> editResult = featureTable.getServiceGeodatabase().applyEditsAsync();
    editResult.addDoneListener(() -> {
      try {
        List<FeatureTableEditResult> edits = editResult.get();
        // check if the server edit was successful
        if (edits != null && edits.size() > 0) {
          var featureEditResult = edits.get(0).getEditResult().get(0);
          if (!featureEditResult.hasCompletedWithErrors()) {
            displayMessage(null, "Attributes updated");
          } else {
            throw featureEditResult.getError();
          }
        }
      } catch (InterruptedException | ExecutionException e) {
        displayMessage("Exception applying edits on server", e.getCause().getMessage());
      }
    });
  }

  /**
   * Shows a message in an alert dialog.
   *
   * @param title title of alert
   * @param message message to display
   */
  private void displayMessage(String title, String message) {

    Platform.runLater(() -> {
      Alert dialog = new Alert(Alert.AlertType.INFORMATION);
      dialog.initOwner(mapView.getScene().getWindow());
      dialog.setHeaderText(title);
      dialog.setContentText(message);
      dialog.showAndWait();
    });
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    // release resources when the application closes
    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);
  }

}