package org.opentrafficsim.kpi.sampling;
   
   import java.io.Serializable;
   
   import org.djunits.value.vdouble.scalar.Length;
   import org.djutils.exceptions.Throw;
   import org.opentrafficsim.kpi.interfaces.LaneDataInterface;
   
   /**
   * Store one position, direction and lane of a GTU.
   * <p>
   * Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
   * </p>
   * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
   * initial version Nov 11, 2015 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   */
  public class KpiDirectedLanePosition implements Serializable
  {
      /** */
      private static final long serialVersionUID = 20151111L;
  
      /** The lane for the position. */
      private final LaneDataInterface lane;
  
      /** The position on the lane, relative to the cross section link (design line). */
      private final Length position;
  
      /** The direction the vehicle is driving to -- either in the direction of the design line, or against it. */
      private final KpiGtuDirectionality gtuDirection;
  
      /**
       * Construct a new DirectedLanePosition.
       * @param lane LaneDataInterface; the lane for the position
       * @param position Length; the position on the lane, relative to the cross section link (design line)
       * @param gtuDirection KpiGtuDirectionality; the direction the vehicle is driving to -- either in the direction of the
       *            design line, or against it
       */
      public KpiDirectedLanePosition(final LaneDataInterface lane, final Length position, final KpiGtuDirectionality gtuDirection)
      {
          Throw.whenNull(lane, "lane is null");
          Throw.whenNull(position, "position is null");
          Throw.whenNull(gtuDirection, "gtuDirection is null");
          this.lane = lane;
          this.position = position;
          this.gtuDirection = gtuDirection;
      }
  
      /**
       * Retrieve the lane.
       * @return LaneDataInterface; the lane for the position
       */
      public final LaneDataInterface getLaneData()
      {
          return this.lane;
      }
  
      /**
       * Retrieve the position on the lane.
       * @return Length; the position on the lane, relative to the cross section link (design line)
       */
      public final Length getPosition()
      {
          return this.position;
      }
  
      /**
       * Retrieve the gtuDirection.
       * @return KpiGtuDirectionality; gtuDirection the direction the vehicle is driving to -- either in the direction of the
       *         design line, or against it
       */
      public final KpiGtuDirectionality getKpiGtuDirection()
      {
          return this.gtuDirection;
      }
  
      /** {@inheritDoc} */
      @Override
      public int hashCode()
      {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((this.gtuDirection == null) ? 0 : this.gtuDirection.hashCode());
          result = prime * result + ((this.lane == null) ? 0 : this.lane.hashCode());
          result = prime * result + ((this.position == null) ? 0 : this.position.hashCode());
          return result;
      }
  
      /** {@inheritDoc} */
      @Override
      public boolean equals(final Object obj)
      {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (getClass() != obj.getClass())
             return false;
         KpiDirectedLanePosition other = (KpiDirectedLanePosition) obj;
         if (this.gtuDirection != other.gtuDirection)
             return false;
         if (this.lane == null)
         {
             if (other.lane != null)
                 return false;
         }
         else if (!this.lane.equals(other.lane))
             return false;
         if (this.position == null)
         {
             if (other.position != null)
                 return false;
         }
         else if (!this.position.equals(other.position))
             return false;
         return true;
     }
 
     /** {@inheritDoc} */
     @Override
     public String toString()
     {
         return "DirectedLanePosition [lane=" + this.lane + ", position=" + this.position + ", gtuDirection=" + this.gtuDirection
                 + "]";
     }
 
 }