package org.opentrafficsim.water.network;
   
   import java.io.Serializable;
   
   import javax.media.j3d.BoundingSphere;
   import javax.media.j3d.Bounds;
   
   import org.djunits.unit.LengthUnit;
   import org.djunits.value.vdouble.scalar.Length;
  import org.djutils.exceptions.Throw;
  
  import nl.tudelft.simulation.dsol.animation.Locatable;
  import nl.tudelft.simulation.language.d3.DirectedPoint;
  
  /**
   * Location along a waterway.
   * <p>
   * Copyright (c) 2013-2020 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/current/license.html">OpenTrafficSim License</a>.
   * </p>
   * <p>
   * Based on software from the IDVV project, which is Copyright (c) 2013 Rijkswaterstaat - Dienst Water, Verkeer en Leefomgeving
   * and licensed without restrictions to Delft University of Technology, including the right to sub-license sources and derived
   * products to third parties.
   * </p>
   * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
   * initial version Nov 6, 2016 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   */
  public class WaterwayLocation implements Locatable, Serializable
  {
      /** */
      private static final long serialVersionUID = 20161106L;
  
      /** the waterway. */
      private final Waterway waterway;
  
      /** position along the waterway, in the direction of the design line. */
      private final Length position;
  
      /** cached location. */
      private final DirectedPoint location;
  
      /**
       * @param waterway Waterway; the waterway
       * @param position Length; position along the waterway, in the direction of the design line
       */
      public WaterwayLocation(final Waterway waterway, final Length position)
      {
          Throw.whenNull(waterway, "waterway cannot be null");
          Throw.whenNull(position, "position cannot be null");
          this.waterway = waterway;
          this.position = position;
          this.location = waterway.getDesignLine().getLocationExtended(position);
      }
  
      /**
       * @return waterway the waterway
       */
      public final Waterway getWaterway()
      {
          return this.waterway;
      }
  
      /**
       * @return position position along the waterway, in the direction of the design line
       */
      public final Length getPosition()
      {
          return this.position;
      }
  
      /** {@inheritDoc} */
      @Override
      public final DirectedPoint getLocation()
      {
          return this.location;
      }
  
      /** {@inheritDoc} */
      @Override
      public final Bounds getBounds()
      {
          return new BoundingSphere();
      }
  
      /** {@inheritDoc} */
      @Override
      public final String toString()
      {
          return this.waterway + "(" + this.getPosition().getInUnit(LengthUnit.KILOMETER) + ")";
      }
  
      /**
       * @return short route info
       */
      public final String toShortString()
      {
          return String.format("%1$s(%2$4.2f)", this.waterway.getId(), this.getPosition().getInUnit(LengthUnit.KILOMETER));
     }
 }