package org.momeunit.ant.emulator;import java.io.File;import org.momeunit.ant.core.WtkTool;/** * Abstract base class of all emulators. Extends {@link WtkTool}. Contains * {@link #execute(String, File, File)} abstract method that every emulator must * implement. Contains <code>device</code> property accessible via * {@link #setDevice(String)} and {@link #getDevice()} methods. *  * @author Sergio Morozov * @version 1.1.2 */public abstract class Emulator extends WtkTool{  /**   * Name of device property.   *    * @since 1.1   */  public static final String DEVICE_PROPERTY = "device";  /**   * Instantiates emulator with given WTK home directory.   *    * @param wtkHome   *          WTK home directory.   * @since 1.1   */  public Emulator(File wtkHome)  {    super(wtkHome);  }  /**   * Instantiates emulator.   *    * @since 1.1   */  public Emulator()  {    this(null);  }  /**   * Returns the device used when running emulator.   *    * @return used device.   * @since 1.1   */  public String getDevice()  {    return getProperty(DEVICE_PROPERTY);  }  /**   * Sets the device used when running emulator.   *    * @param device   *          device to use.   * @since 1.1   */  public void setDevice(String device)  {    setProperty(DEVICE_PROPERTY, device);  }  /**   * Abstract method intended to start emulator that every emulator must   * implement.   *    * @param midletClass   *          classname of midlet to start. Can be <code>null</code>.   * @param jad   *          JAD descriptor of application to run. Can be <code>null</code>.   * @param jar   *          Jar archive of application to run. Can be <code>null</code>.   * @return {@link Process} associated with running emulator.   * @since 1.1   */  public abstract Process execute(String midletClass, File jad, File jar);}