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.Collection;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import org.openqa.selenium.html5.LocalStorage;
  import org.openqa.selenium.remote.DriverCommand;
  import org.openqa.selenium.remote.ExecuteMethod;
  
  /** Executes the commands to access HTML5 localStorage on the remote webdriver server. */
  public class RemoteLocalStorage implements LocalStorage {
    private final ExecuteMethod executeMethod;
  
    public RemoteLocalStorage(ExecuteMethod executeMethod) {
      this.executeMethod = executeMethod;
    }
  
    @Override
    public String getItem(String key) {
      Map<String, String> args = ImmutableMap.of("key", key);
      return (String) executeMethod.execute(DriverCommand.GET_LOCAL_STORAGE_ITEM, args);
    }
  
    @Override
    public Set<String> keySet() {
      @SuppressWarnings("unchecked")
      Collection<String> result =
          (Collection<String>) executeMethod.execute(DriverCommand.GET_LOCAL_STORAGE_KEYS, null);
      return new HashSet<>(result);
    }
  
    @Override
    public void setItem(String key, String value) {
      Map<String, String> args = ImmutableMap.of("key", key, "value", value);
      executeMethod.execute(DriverCommand.SET_LOCAL_STORAGE_ITEM, args);
    }
  
    @Override
    public String removeItem(String key) {
      String value = getItem(key);
      Map<String, String> args = ImmutableMap.of("key", key);
      executeMethod.execute(DriverCommand.REMOVE_LOCAL_STORAGE_ITEM, args);
      return value;
    }
  
    @Override
    public void clear() {
      executeMethod.execute(DriverCommand.CLEAR_LOCAL_STORAGE, null);
    }
  
    @Override
    public int size() {
      Object response = executeMethod.execute(DriverCommand.GET_LOCAL_STORAGE_SIZE, null);
      return Integer.parseInt(response.toString());
    }
  }
  