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package org.openqa.selenium.opera;

import org.openqa.selenium.Capabilities;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverException;
import org.openqa.selenium.html5.LocalStorage;
import org.openqa.selenium.html5.Location;
import org.openqa.selenium.html5.LocationContext;
import org.openqa.selenium.html5.SessionStorage;
import org.openqa.selenium.html5.WebStorage;
import org.openqa.selenium.remote.FileDetector;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.remote.html5.RemoteLocationContext;
import org.openqa.selenium.remote.html5.RemoteWebStorage;
import org.openqa.selenium.remote.service.DriverCommandExecutor;

/**
 * A {@link WebDriver} implementation that controls a Blink-based Opera browser running on the local
 * machine. This class is provided as a convenience for easily testing the Chrome browser. The
 * control server which each instance communicates with will live and die with the instance.
 *
 * To avoid unnecessarily restarting the OperaDriver server with each instance, use a
 * {@link RemoteWebDriver} coupled with the desired {@link OperaDriverService}, which is managed
 * separately. For example: {@code
 *
 * import static org.junit.Assert.assertEquals;
 *
 * import org.junit.*;
 * import org.junit.runner.RunWith;
 * import org.junit.runners.JUnit4;
 * import org.openqa.selenium.opera.OperaDriverService;
 * import org.openqa.selenium.remote.DesiredCapabilities;
 * import org.openqa.selenium.remote.RemoteWebDriver;
 *
 * {@literal @RunWith(JUnit4.class)}
 * public class OperaTest extends TestCase {
 *
 *   private static OperaDriverService service;
 *   private WebDriver driver;
 *
 *   {@literal @BeforeClass}
 *   public static void createAndStartService() {
 *     service = new OperaDriverService.Builder()
 *         .usingDriverExecutable(new File("path/to/my/operadriver.exe"))
 *         .usingAnyFreePort()
 *         .build();
 *     service.start();
 *   }
 *
 *   {@literal @AfterClass}
 *   public static void createAndStopService() {
 *     service.stop();
 *   }
 *
 *   {@literal @Before}
 *   public void createDriver() {
 *     driver = new RemoteWebDriver(service.getUrl(),
 *         DesiredCapabilities.opera());
 *   }
 *
 *   {@literal @After}
 *   public void quitDriver() {
 *     driver.quit();
 *   }
 *
 *   {@literal @Test}
 *   public void testGoogleSearch() {
 *     driver.get("http://www.google.com");
 *     WebElement searchBox = driver.findElement(By.name("q"));
 *     searchBox.sendKeys("webdriver");
 *     searchBox.quit();
 *     assertEquals("webdriver - Google Search", driver.getTitle());
 *   }
 * }
 * }
 *
 * Note that unlike OperaDriver, RemoteWebDriver doesn't directly implement
 * role interfaces such as {@link LocationContext} and {@link WebStorage}.
 * Therefore, to access that functionality, it needs to be
 * {@link org.openqa.selenium.remote.Augmenter augmented} and then cast
 * to the appropriate interface.
 *
 * @see OperaDriverService#createDefaultService
 */
public class OperaDriver extends RemoteWebDriver
    implements LocationContext, WebStorage {

  private RemoteLocationContext locationContext;
  private RemoteWebStorage webStorage;

  /**
   * Creates a new OperaDriver using the {@link OperaDriverService#createDefaultService default}
   * server configuration.
   *
   * @see #OperaDriver(OperaDriverService, OperaOptions)
   */
  public OperaDriver() {
    this(OperaDriverService.createDefaultService(), new OperaOptions());
  }

  /**
   * Creates a new OperaDriver instance. The {@code service} will be started along with the driver,
   * and shutdown upon calling {@link #quit()}.
   *
   * @param service The service to use.
   * @see #OperaDriver(OperaDriverService, OperaOptions)
   */
  public OperaDriver(OperaDriverService service) {
    this(service, new OperaOptions());
  }

  /**
   * Creates a new OperaDriver instance. The {@code capabilities} will be passed to the
   * chromedriver service.
   *
   * @param capabilities The capabilities required from the OperaDriver.
   * @see #OperaDriver(OperaDriverService, Capabilities)
   */
  public OperaDriver(Capabilities capabilities) {
    this(OperaDriverService.createDefaultService(), capabilities);
  }

  /**
   * Creates a new OperaDriver instance with the specified options.
   *
   * @param options The options to use.
   * @see #OperaDriver(OperaDriverService, OperaOptions)
   */
  public OperaDriver(OperaOptions options) {
    this(OperaDriverService.createDefaultService(), options);
  }

  /**
   * Creates a new OperaDriver instance with the specified options. The {@code service} will be
   * started along with the driver, and shutdown upon calling {@link #quit()}.
   *
   * @param service The service to use.
   * @param options The options to use.
   */
  public OperaDriver(OperaDriverService service, OperaOptions options) {
    this(service, options.toCapabilities());
  }

  /**
   * Creates a new OperaDriver instance. The {@code service} will be started along with the
   * driver, and shutdown upon calling {@link #quit()}.
   *
   * @param service The service to use.
   * @param capabilities The capabilities required from the OperaDriver.
   */
  public OperaDriver(OperaDriverService service, Capabilities capabilities) {
    super(new DriverCommandExecutor(service), capabilities);
    locationContext = new RemoteLocationContext(getExecuteMethod());
    webStorage = new  RemoteWebStorage(getExecuteMethod());
  }

  @Override
  public void setFileDetector(FileDetector detector) {
    throw new WebDriverException(
        "Setting the file detector only works on remote webdriver instances obtained " +
        "via RemoteWebDriver");
  }

  @Override
  public LocalStorage getLocalStorage() {
    return webStorage.getLocalStorage();
  }

  @Override
  public SessionStorage getSessionStorage() {
    return webStorage.getSessionStorage();
  }

  @Override
  public Location location() {
    return locationContext.location();
  }

  @Override
  public void setLocation(Location location) {
    locationContext.setLocation(location);
  }
}