package org.opentrafficsim.core.units.distributions;
   
   import java.io.Serializable;
   
   import org.djunits.unit.Unit;
   
   import nl.tudelft.simulation.jstats.distributions.DistDiscrete;
   import nl.tudelft.simulation.jstats.distributions.DistDiscreteConstant;
   import nl.tudelft.simulation.jstats.streams.Java2Random;
  import nl.tudelft.simulation.jstats.streams.StreamInterface;
  
  /**
   * Discrete distribution with unit.
   * <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: 2015-07-26 01:01:13 +0200 (Sun, 26 Jul 2015) $, @version $Revision: 1155 $, by $Author: averbraeck $,
   * initial version Feb 2, 2015 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   */
  public abstract class AbstractDiscreteDistScalar implements Serializable
  {
      /** */
      private static final long serialVersionUID = 20150000L;
  
      /** The wrapped distribution function. */
      private final DistDiscrete distribution;
  
      /** The unit. */
      private final Unit<?> unit;
  
      /** The dummy stream for the constant values. Is never really used. */
      private static final StreamInterface DUMMY_STREAM = new Java2Random();
  
      /**
       * @param distribution DistDiscrete; the wrapped distribution function.
       * @param unit Unit&lt;?&gt;; the unit.
       */
      protected AbstractDiscreteDistScalar(final DistDiscrete distribution, final Unit<?> unit)
      {
          super();
          this.distribution = distribution;
          this.unit = unit;
      }
  
      /**
       * @param constant long; the constant value.
       * @param unit Unit&lt;?&gt;; the unit.
       */
      protected AbstractDiscreteDistScalar(final long constant, final Unit<?> unit)
      {
          this(new DistDiscreteConstant(DUMMY_STREAM, constant), unit);
      }
  
      /**
       * @return distribution.
       */
      public final DistDiscrete getDistribution()
      {
          return this.distribution;
      }
  
      /**
       * @return the unit
       */
      public final Unit<?> getUnit()
      {
          return this.unit;
      }
  
      /** {@inheritDoc} */
      @Override
      @SuppressWarnings("checkstyle:designforextension")
      public String toString()
      {
          return "DiscreteDistScalar [distribution=" + this.distribution + ", unit=" + this.unit + "]";
      }
  }