Java examples for Geographic Information System:Esri
delete a Feature from a ServiceFeatureTable in esri
/*/*from www.j a v a 2 s . com*/ * Copyright 2015 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.sampleviewer.samples.editing; import java.util.List; import javafx.application.Application; import javafx.application.Platform; import javafx.geometry.Insets; import javafx.geometry.Point2D; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.TextArea; import javafx.scene.input.MouseButton; import javafx.scene.layout.StackPane; import javafx.scene.layout.VBox; import javafx.stage.Stage; import com.esri.arcgisruntime.concurrent.ListenableFuture; import com.esri.arcgisruntime.datasource.Feature; import com.esri.arcgisruntime.datasource.FeatureQueryResult; import com.esri.arcgisruntime.datasource.QueryParameters; import com.esri.arcgisruntime.datasource.QueryParameters.SpatialRelationship; import com.esri.arcgisruntime.datasource.arcgis.FeatureEditResult; import com.esri.arcgisruntime.datasource.arcgis.ServiceFeatureTable; import com.esri.arcgisruntime.geometry.GeometryEngine; import com.esri.arcgisruntime.geometry.Point; import com.esri.arcgisruntime.geometry.Polygon; import com.esri.arcgisruntime.geometry.SpatialReference; import com.esri.arcgisruntime.geometry.SpatialReferences; import com.esri.arcgisruntime.layers.FeatureLayer; import com.esri.arcgisruntime.layers.FeatureLayer.SelectionMode; import com.esri.arcgisruntime.mapping.Basemap; import com.esri.arcgisruntime.mapping.Map; import com.esri.arcgisruntime.mapping.view.MapView; import com.esri.arcgisruntime.mapping.view.Viewpoint; /** * This sample demonstrates how to delete a Feature from a ServiceFeatureTable. * <h4>How it Works</h4> * * A {@link ServiceFeatureTable} is created from a URL which stores * {@link Feature}s that are associated with that URL. To interact with those * Features a {@link FeatureLayer} needs to be created from that table. A * Feature is then selected using the {@link FeatureLayer#selectFeatures} method * and can be deleted from the table with the * {@link ServiceFeatureTable#deleteFeaturesAsync} method. * <p> * A ListenableFuture needs to be a class level field because it could get * garbage collected right after being set. */ public class DeleteFeatures extends Application { private MapView mapView; private FeatureLayer featureLayer; private ServiceFeatureTable featureTable; private FeatureQueryResult selectedFeatures; private ListenableFuture<FeatureQueryResult> queryResult; private ListenableFuture<Boolean> tableResult; private ListenableFuture<List<FeatureEditResult>> serverResult; private static final String SERVICE_FEATURE_URL = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0"; private static final String SAMPLES_THEME_PATH = "../resources/SamplesTheme.css"; @Override public void start(Stage stage) throws Exception { // create stack pane and application scene StackPane stackPane = new StackPane(); Scene scene = new Scene(stackPane); scene.getStylesheets().add(getClass().getResource(SAMPLES_THEME_PATH) .toExternalForm()); // set title, size, and add scene to stage stage.setTitle("Delete Features Sample"); stage.setWidth(800); stage.setHeight(700); stage.setScene(scene); stage.show(); // create a control panel VBox vBoxControl = new VBox(6); vBoxControl.setMaxSize(250, 200); vBoxControl.getStyleClass().add("panel-region"); // create sample label and description Label descriptionLabel = new Label("Sample Description"); descriptionLabel.getStyleClass().add("panel-label"); TextArea description = new TextArea("This sample shows how to delete " + "Features from a Service Feature Table. Click on the Feature to " + "select it and press the delete button to delete it."); description.setWrapText(true); description.autosize(); description.setEditable(false); // create a delete button Button deleteButton = new Button("Delete Feature"); deleteButton.setMaxWidth(Double.MAX_VALUE); deleteButton.setDisable(true); // delete the selected feature deleteButton.setOnAction(e -> { if (selectedFeatures != null) { deleteFeature(); } }); // add label, description, and button to the control panel vBoxControl.getChildren().addAll(descriptionLabel, description, deleteButton); try { // create a map with streets basemap final Map map = new Map(Basemap.createStreets()); // create starting viewpoint for that map final SpatialReference spatialReference = SpatialReferences .getWebMercator(); Point startPoint = new Point(-036773, 6710477, spatialReference); Viewpoint viewpoint = new Viewpoint(startPoint, 200000); // point and scale // set a initial viewpoint for the map map.setInitialViewpoint(viewpoint); // create service feature table from URL featureTable = new ServiceFeatureTable(SERVICE_FEATURE_URL); featureTable.getOutFields().add("*"); // * gets all fields from the table // create a feature layer from table featureLayer = new FeatureLayer(featureTable); // enable button when feature layer is done loading featureLayer.addDoneLoadingListener(() -> { deleteButton.setDisable(false); }); // add the layer to the map map.getOperationalLayers().add(featureLayer); // create a view and set map to it mapView = new MapView(); mapView.setMap(map); mapView.setOnMouseClicked(e -> { if (e.getButton() == MouseButton.PRIMARY) { // create a point from where the user clicked Point2D point = new Point2D(e.getX(), e.getY()); // create a map point from the point Point mapPoint = mapView.screenToLocation(point); // select feature clicked selectFeatures(mapPoint); } }); // add the map view and control box to stack pane stackPane.getChildren().addAll(mapView, vBoxControl); StackPane.setAlignment(vBoxControl, Pos.TOP_LEFT); StackPane.setMargin(vBoxControl, new Insets(10, 0, 0, 10)); } catch (Exception e) { // on any error, display the stack trace e.printStackTrace(); } } /** * Selects Features around mapPoint. * * @param mapPoint x,y coordinate pair */ private void selectFeatures(Point mapPoint) { // get unit per pixel times ten double distance = mapView.getUnitsPerPixel() * 10; // create a buffer for the mapPoint Polygon pointBuffer = GeometryEngine.buffer(mapPoint, distance); // create a query from pointBuffer QueryParameters queryParams = new QueryParameters(); queryParams.setGeometry(pointBuffer); queryParams.setSpatialRelationship(SpatialRelationship.WITHIN); queryParams.getOutFields().add("*"); // select based on the query queryResult = featureLayer.selectFeatures(queryParams, SelectionMode.NEW); try { // get selection selectedFeatures = queryResult.get(); // if feature not selected if (!selectedFeatures.iterator().hasNext()) { selectedFeatures = null; } } catch (Exception e) { // on any error, display the stack trace e.printStackTrace(); } } /** * Deletes selected Features from a ServiceFeatureTable and applies the * changes to the server. */ private void deleteFeature() { if (selectedFeatures != null) { // delete the features from the service feature table tableResult = featureTable .deleteFeaturesAsync(selectedFeatures); try { // if successful update server if (tableResult.get().booleanValue()) { // apply changes to the server serverResult = featureTable.applyEditsAsync(); // check if the server result was successful if (!serverResult.get().get(0).hasCompletedWithErrors()) { System.out.println("Feature successfully deleted"); } else { System.out .println("Server Error: Failed to delete feature from Server."); } } else { System.out .println("Table Error: Failed to delete feature from ServiceFeatureTable."); } } catch (Exception e) { // on any error, display the stack trace e.printStackTrace(); } } } /** * Stops and releases all resources used in application. * * @throws Exception if security manager doesn't allow JVM to exit with * current status */ @Override public void stop() throws Exception { if (mapView != null) { mapView.dispose(); } Platform.exit(); System.exit(0); } /** * Opens and runs application. * * @param args arguments passed to this application */ public static void main(String[] args) { Application.launch(args); } }