query a FeatureLayer via a ServiceFeatureTable using esri - Java Geographic Information System

Description

query a FeatureLayer via a ServiceFeatureTable using esri

Demo Code

  /*//from   w w w . j av a2  s . c om
   * 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.featurelayers;

  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.arcgis.ServiceFeatureTable;
  import com.esri.arcgisruntime.geometry.Envelope;
  import com.esri.arcgisruntime.geometry.Point;
  import com.esri.arcgisruntime.geometry.SpatialReferences;
  import com.esri.arcgisruntime.layers.FeatureLayer;
  import com.esri.arcgisruntime.mapping.Basemap;
  import com.esri.arcgisruntime.mapping.Map;
  import com.esri.arcgisruntime.mapping.view.MapView;
  import com.esri.arcgisruntime.symbology.RgbColor;
  import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
  import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
  import com.esri.arcgisruntime.symbology.SimpleRenderer;

  import javafx.application.Application;
  import javafx.application.Platform;
  import javafx.geometry.Insets;
  import javafx.geometry.Pos;
  import javafx.scene.Scene;
  import javafx.scene.control.Alert;
  import javafx.scene.control.Alert.AlertType;
  import javafx.scene.control.Button;
  import javafx.scene.control.Label;
  import javafx.scene.control.TextArea;
  import javafx.scene.control.TextField;
  import javafx.scene.layout.HBox;
  import javafx.scene.layout.StackPane;
  import javafx.scene.layout.VBox;
  import javafx.stage.Stage;

  /**
   * This sample demonstrates how to query a FeatureLayer via a
   * ServiceFeatureTable.
   * <h4>How it Works</h4>
   * 
   * {@link QueryParameters} are created from the text that was entered by the
   * user. The {@link ServiceFeatureTable#queryFeaturesAsync} method takes those
   * parameters and searches through the {@link ServiceFeatureTable} for a match.
   * <h4>Implementation Requirements</h4>
   * 
   * ListenableFuture needs to be a class level field because it could get garbage
   * collected right after being set. Meaning that the addDoneListener method will
   * never be called.
   */
  public class FeatureLayerQuery extends Application {

      private Alert dialog;

      private MapView mapView;
      private FeatureLayer featureLayer;
      private ServiceFeatureTable featureTable;
      private Point startPoint;
      private ListenableFuture<FeatureQueryResult> tableQueryResult;

      private static final String SERVICE_FEATURE_URL = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/2";
      private static final int SCALE = 100000000;

      @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("../resources/SamplesTheme.css").toExternalForm());

  // set title, size, and add scene to stage
  stage.setTitle("Feature Layer Query Sample");
  stage.setWidth(800);
  stage.setHeight(700);
  stage.setScene(scene);
  stage.show();

  // create a control panel
  VBox vBoxControl = new VBox(6);
  vBoxControl.setMaxSize(240, 270);
  vBoxControl.getStyleClass().add("panel-region");

  // create sample description
  Label descriptionLabel = new Label("Sample Description:");
  descriptionLabel.getStyleClass().add("panel-label");
  TextArea description = new TextArea(
      "This sample shows how to query a Feature Layer via a Service Feature "
          + "Table.\nEnter the full name of a US state and hit submit. If found "
          + "the view will zoom to that state.");
  description.setWrapText(true);
  description.autosize();
  description.setEditable(false);

  // create area for searching
  Label searchLabel = new Label("Search for a State.");
  searchLabel.getStyleClass().add("panel-label");
  TextField searchField = new TextField();
  Button searchButton = new Button("Submit");
  HBox searchBox = new HBox(5);
  searchBox.getChildren().addAll(searchField, searchButton);
  searchBox.setDisable(true);

  // create dialog to display alert information
  dialog = new Alert(AlertType.WARNING);

  // search for the state that was entered
  searchButton.setOnAction(e -> {
    // clear the selection of the feature
    featureLayer.clearSelection();
    String stateText = searchField.getText();

    if (stateText.trim().length() > 0) {
      searchForState(stateText);
    } else {
      dialog.setContentText("State Not Found! Add a valid state name.");
      dialog.showAndWait();
      mapView.setViewpointCenterWithScaleAsync(startPoint, SCALE);
    }
  });

  // add labels, sample description, and search box to the control panel
  vBoxControl.getChildren().addAll(descriptionLabel, description, searchLabel,
      searchBox);
  try {

    // create a starting point for the view
    startPoint =
        new Point(-11000000, 5000000, SpatialReferences.getWebMercator());

    // set fill color for the US states
    SimpleLineSymbol lineSymbol = new SimpleLineSymbol(
        SimpleLineSymbol.Style.SOLID, new RgbColor(0, 0, 0, 255), 1, 0.6f);
    SimpleFillSymbol fillSymbol =
        new SimpleFillSymbol(new RgbColor(255, 204, 0, 255),
            SimpleFillSymbol.Style.SOLID, lineSymbol, 0.5f);

    // create a service feature table
    featureTable = new ServiceFeatureTable(SERVICE_FEATURE_URL);

    // create a feature layer from table
    featureLayer = new FeatureLayer(featureTable);
    featureLayer.setOpacity(0.8f);

    // enable search once the feature layer is loaded
    featureLayer.addDoneLoadingListener(() -> searchBox.setDisable(false));

    // set renderer for feature layer
    featureLayer.setRenderer(new SimpleRenderer(fillSymbol));

    // create a map with basemap topographic
    final Map map = new Map(Basemap.createTopographic());

    // add feature layer to operational layers
    map.getOperationalLayers().add(featureLayer);

    // create a view for this map
    mapView = new MapView();
    mapView.setMap(map);

    // set viewpoint to the start point
    mapView.setViewpointCenterWithScaleAsync(startPoint, SCALE);

    // add the map view and control panel 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();
  }
}

      /**
       * Searches for a US state inside the current ServiceFeatureTable.
       * 
       * @param state a US state that is being searched
       */
      private void searchForState(String state) {

  // create a query for the state that was entered
  QueryParameters query = new QueryParameters();
  query
      .setWhereClause("upper(STATE_NAME) LIKE '" + state.toUpperCase() + "'");
  query.getOutFields().add("*");

  // search for the state feature in the feature table
  tableQueryResult = featureTable.queryFeaturesAsync(query);

  tableQueryResult.addDoneListener(() -> {
    try {
      // get the result from the query
      FeatureQueryResult result = tableQueryResult.get();
      // if a state feature was found
      if (result.iterator().hasNext()) {
        // get state feature and zoom to it
        Feature feature = result.iterator().next();
        Envelope envelope = feature.getGeometry().getExtent();
        mapView.setViewpointGeometryWithPaddingAsync(envelope, 200);

        // set the state feature to be selected
        featureLayer.selectFeature(feature);
      } else {
        Platform.runLater(() -> {
          dialog.setContentText("State Not Found! Add a valid state name.");
          dialog.showAndWait();
          mapView.setViewpointCenterWithScaleAsync(startPoint, SCALE);
        });
      }
    } 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);
      }

  }

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• Set Manual Cache mode on a ServiceFeatureTable and how to manually fetch Features from that table using esri
• create a ServiceFeatureTable with cache mode set to ON_INTERACTION_CACHE using esri
• select Features from a FeatureLayer using esri
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• limit what Features are displayed on a Map using esri