package org.opentrafficsim.kpi.sampling.data;
   
   import java.util.Optional;
   
   import org.djunits.value.vfloat.scalar.FloatSpeed;
   import org.opentrafficsim.kpi.interfaces.GtuData;
   
   /**
    * Reference speed for trajectories, as defined by the used GtuData.
   * <p>
   * Copyright (c) 2013-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
   * </p>
   * @author Alexander Verbraeck
   * @author Peter Knoppers
   * @author Wouter Schakel
   */
  public class ReferenceSpeed extends ExtendedDataSpeed<GtuData>
  {
  
      /** Single instance. */
      public static final ReferenceSpeed INSTANCE = new ReferenceSpeed();
  
      /**
       * Constructor.
       */
      public ReferenceSpeed()
      {
          super("referenceSpeed", "Reference speed");
      }
  
      @Override
      public final Optional<FloatSpeed> getValue(final GtuData gtu)
      {
          return Optional.of(FloatSpeed.ofSI((float) gtu.getReferenceSpeed().si));
      }
  
      @Override
      public final String toString()
      {
          return "Reference Speed";
      }
  
  }