package org.opentrafficsim.road.gtu.lane.perception;
   
   import java.util.Iterator;
   import java.util.NoSuchElementException;
   import java.util.TreeSet;
   import java.util.function.Supplier;
   
   import org.opentrafficsim.road.gtu.lane.LaneBasedGTU;
   import org.opentrafficsim.road.gtu.lane.perception.headway.Headway;
  import org.opentrafficsim.road.network.OTSRoadNetwork;
  
  /**
   * Simple class implementing a SortedSet. This is mainly for backwards compatibility. Methods that determine the elements 1-by-1
   * are much preferred for efficiency.
   * <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/node/13">OpenTrafficSim License</a>.
   * <p>
   * @version $Revision$, $LastChangedDate$, by $Author$, initial version 19 feb. 2018 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
   * @param <H> headway type
   */
  @Deprecated
  public class SortedSetPerceptionIterable<H extends Headway> extends TreeSet<H> implements PerceptionCollectable<H, LaneBasedGTU>
  {
  
      /** */
      private static final long serialVersionUID = 20180219L;
  
      /** Network to obtain LaneBasedGTU. */
      private final OTSRoadNetwork network;
  
      /**
       * Constructor.
       * @param otsNetwork OTSRoadNetwork; network to obtain LaneBasedGTU
       */
      public SortedSetPerceptionIterable(final OTSRoadNetwork otsNetwork)
      {
          this.network = otsNetwork;
      }
  
      /** {@inheritDoc} */
      @Override
      public <C, I> C collect(final Supplier<I> identity, final PerceptionAccumulator<? super LaneBasedGTU, I> accumulator,
              final PerceptionFinalizer<C, I> finalizer)
      {
          Intermediate<I> intermediate = new Intermediate<>(identity.get());
          Iterator<H> it = iterator();
          while (it.hasNext() && !intermediate.isStop())
          {
              H next = it.next();
              intermediate =
                      accumulator.accumulate(intermediate, (LaneBasedGTU) this.network.getGTU(next.getId()), next.getDistance());
              intermediate.step();
          }
          return finalizer.collect(intermediate.getObject());
      }
  
      /** {@inheritDoc} */
      @Override
      public Iterator<LaneBasedGTU> underlying()
      {
          return new Iterator<LaneBasedGTU>()
          {
              /** {@inheritDoc} */
              @Override
              public boolean hasNext()
              {
                  return false;
              }
  
              /** {@inheritDoc} */
              @Override
              public LaneBasedGTU next()
              {
                  throw new NoSuchElementException();
              }
  
          };
      }
  
  }