TrafficLightColor.java

  1. package org.opentrafficsim.road.network.lane.object.trafficlight;

  3. /**
  4.  * The colors for a normal traffic light.
  5.  * <p>
  6.  * Copyright (c) 2013-2016 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
  7.  * BSD-style license. See <a href="http://opentrafficsim.org/docs/current/license.html">OpenTrafficSim License</a>.
  8.  * </p>
  9.  * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
  10.  * initial version Oct 6, 2016 <br>
  11.  * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
  12.  * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
  13.  * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
  14.  */
  15. public enum TrafficLightColor
  16. {
  17.     /** GTU needs to stop. */
  18.     RED,

  20.     /** GTU is allowed to continue if it cannot stop anymore. */
  21.     YELLOW,

  23.     /** GTU is allowed to drive. */
  24.     GREEN,

  26.     /** Traffic light is not working. */
  27.     BLACK;
  28.     
  29.     /** @return whether the light is red. */
  30.     public final boolean isRed()
  31.     {
  32.         return this.equals(RED);
  33.     }
  34.     
  35.     /** @return whether the light is yellow. */
  36.     public final boolean isYellow()
  37.     {
  38.         return this.equals(YELLOW);
  39.     }
  40.     
  41.     /** @return whether the light is green. */
  42.     public final boolean isGreen()
  43.     {
  44.         return this.equals(GREEN);
  45.     }
  46.     
  47.     /** @return whether the light is black (off). */
  48.     public final boolean isBlack()
  49.     {
  50.         return this.equals(BLACK);
  51.     }

  53. }
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