code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you 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 org.openqa.selenium.remote.html5;
  
  import com.google.common.collect.ImmutableMap;
  import java.util.Map;
  import org.openqa.selenium.html5.Location;
  import org.openqa.selenium.html5.LocationContext;
  import org.openqa.selenium.remote.DriverCommand;
  import org.openqa.selenium.remote.ExecuteMethod;
  
  public class RemoteLocationContext implements LocationContext {
    private final ExecuteMethod executeMethod;
  
    public RemoteLocationContext(ExecuteMethod executeMethod) {
      this.executeMethod = executeMethod;
    }
  
    @Override
    public Location location() {
      @SuppressWarnings("unchecked")
      Map<String, Number> result =
          (Map<String, Number>) executeMethod.execute(DriverCommand.GET_LOCATION, null);
      if (result == null) {
        return null;
      }
      return new Location(
          castToDouble(result.get("latitude")),
          castToDouble(result.get("longitude")),
          castToDouble(result.get("altitude")));
    }
  
    private Double castToDouble(Number number) {
      if (number instanceof Double) {
        return (Double) number;
      } else if (number instanceof Long) {
        return number.doubleValue();
      } else {
        throw new RuntimeException("Can't convert to double: " + number);
      }
    }
  
    @Override
    public void setLocation(Location location) {
      Map<String, Location> args = ImmutableMap.of("location", location);
      executeMethod.execute(DriverCommand.SET_LOCATION, args);
    }
  }
  