package org.opentrafficsim.road.network.factory.osm;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.opentrafficsim.core.network.OTSNode;
   
   /**
    * OpenStreetmap Node.
   * <p>
   * Copyright (c) 2013-2015 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: 2015-08-23 00:48:01 +0200 (Sun, 23 Aug 2015) $, @version $Revision: 1291 $, by $Author: averbraeck $,
   * initial version 31 dec. 2014 <br>
   * @author <a>Moritz Bergmann</a>
   */
  public class OSMNode
  {
      /** The id of this OSMNode. */
      private final long id;
  
      /** The longitude of this OSMNode. */
      private final double longitude;
  
      /** The latitude of this OSMNode. */
      private final double latitude;
  
      /** The tags of this OSMNode. */
      private List<OSMTag> tags;
  
      /** Does this OSMNode have a traffic signal? */
      private boolean trafficSignal = false;
  
      /** Does this OSMNode have a stop sign? */
      private boolean stopSign = false;
  
      /** Does this OSMNode have a yield sign? */
      private boolean yieldSign = false;
  
      /** Is this OSMNode a crossing? */
      private boolean crossing = false;
  
      /** The number of OSMLinks originating at this OSMNode; i.e. having this node as start. */
      public int linksOriginating = 0;
  
      /** The number of OSMLinks ending at this OSMNode; i.e. having this node as end. */
      public int linksTerminating = 0;
  
      /** The OTS Node that corresponds to this OSMNode. */
      private OTSNode otsNode = null;
  
      /**
       * @return Id
       */
      public final long getId()
      {
          return this.id;
      }
  
      /**
       * @return longitude
       */
      public final double getLongitude()
      {
          return this.longitude;
      }
  
      /**
       * @return latitude
       */
      public final double getLatitude()
      {
          return this.latitude;
      }
  
      /**
       * Construct a new OSMNode.
       * @param id long; id of the new OSMNode
       * @param longitude double; longitude of the new OSMNode
       * @param latitude double; latitude of the new OSMNode
       */
      public OSMNode(final long id, final double longitude, final double latitude)
      {
          this.id = id;
          this.longitude = longitude;
          this.latitude = latitude;
          this.tags = new ArrayList<OSMTag>();
      }
  
      /**
       * Retrieve a tag of this OSMNode.
       * @param key String; the key of the tag to retrieve
       * @return OSMTag, or null if this OSMNode has no tag with the specified key
       */
      public final OSMTag getTag(final String key)
      {
          for (OSMTag tag : this.tags)
          {
             if (tag.getKey().equals(key))
             {
                 return tag;
             }
         }
         return null;
     }
 
     /**
      * Add a tag to this OSMNode.
      * @param tag OSMTag; the tag to add to this OSMNode
      */
     public final void addTag(final OSMTag tag)
     {
         this.tags.add(tag);
         if (tag.getKey().equals("highway"))
         {
             switch (tag.getValue())
             {
                 case "crossing":
                     this.setCrossing(true);
                     break;
                 case "give_way":
                     this.setYieldSign(true);
                     break;
                 case "stop":
                     this.setStopSign(true);
                     break;
                 case "traffic_signals":
                     this.setTrafficSignal(true);
                     break;
                 default:
                     break;
             }
         }
     }
 
     /** {@inheritDoc} */
     public final String toString()
     {
         return String.format("Node %d %.6f %.6f", getId(), getLongitude(), getLatitude());
     }
 
     /**
      * @return trafficSignal.
      */
     public final boolean isTrafficSignal()
     {
         return this.trafficSignal;
     }
 
     /**
      * @param trafficSignal set trafficSignal.
      */
     public final void setTrafficSignal(final boolean trafficSignal)
     {
         this.trafficSignal = trafficSignal;
     }
 
     /**
      * @return stopSign.
      */
     public final boolean isStopSign()
     {
         return this.stopSign;
     }
 
     /**
      * @param stopSign set stopSign.
      */
     public final void setStopSign(final boolean stopSign)
     {
         this.stopSign = stopSign;
     }
 
     /**
      * @return yieldSign.
      */
     public final boolean isYieldSign()
     {
         return this.yieldSign;
     }
 
     /**
      * @param yieldSign set yieldSign.
      */
     public final void setYieldSign(final boolean yieldSign)
     {
         this.yieldSign = yieldSign;
     }
 
     /**
      * @return crossing.
      */
     public final boolean isCrossing()
     {
         return this.crossing;
     }
 
     /**
      * @param crossing set crossing.
      */
     public final void setCrossing(final boolean crossing)
     {
         this.crossing = crossing;
     }
 
     /**
      * @param n OTSNode&lt;String&gt;
      */
     public final void setOtsNode(final OTSNode n)
     {
         if (this.otsNode != null)
         {
             throw new Error("OTS Node already set, can only be set once.");
         }
         this.otsNode = n;
     }
 
     /**
      * @return OTSNodeOTSNode&lt;String&gt; - The associated OTS Node.
      */
     public final OTSNode getOtsNode()
     {
         return this.otsNode;
     }
 
     /**
      * @return boolean; true if this OSMNode has no tags; false otherwise
      */
     public final boolean hasNoTags()
     {
         return this.tags.isEmpty();
     }
 }