package org.opentrafficsim.road.network.factory.opendrive;
   
   import java.io.Serializable;
   
   import org.opentrafficsim.core.network.NetworkException;
   import org.opentrafficsim.road.network.factory.opendrive.LinkTag.ContactPointEnum;
   import org.w3c.dom.NamedNodeMap;
   import org.w3c.dom.Node;
   import org.xml.sax.SAXException;
  
  /**
   * <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: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
   * initial version Jul 23, 2015 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   */
  class ConnectionTag implements Serializable
  {
  
      /** */
      private static final long serialVersionUID = 20150723L;
  
      /** Id of the lane. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      String id = null;
  
      /** Incoming Road id */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      String incomingRoad = null;
  
      /** Connecting Road id */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      String connectingRoad = null;
  
      /** Contact point. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      ContactPointEnum contactPoint = null;
  
      /** Lane Link From. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Integer laneLinkFrom = null;
  
      /** Lane Link To. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Integer laneLinkTo = null;
  
      /**
       * Parse the attributes of the road tag. The sub-elements are parsed in separate classes.
       * @param node Node; the top-level road node
       * @param parser OpenDriveNetworkLaneParser; the parser with the lists of information
       * @return the generated RoadTag for further reference
       * @throws SAXException when parsing of the tag fails
       * @throws NetworkException when parsing of the tag fails
       */
      @SuppressWarnings("checkstyle:needbraces")
      static ConnectionTag parseConnection(final Node node, final OpenDriveNetworkLaneParser parser)
              throws SAXException, NetworkException
      {
          NamedNodeMap attributes = node.getAttributes();
          ConnectionTag connectionTag = new ConnectionTag();
  
          Node id = attributes.getNamedItem("id");
          if (id == null)
              throw new SAXException("LANE: missing attribute id");
          connectionTag.id = id.getNodeValue().trim();
  
          Node incomingRoad = attributes.getNamedItem("incomingRoad");
          if (incomingRoad == null)
              throw new SAXException("LANE: missing attribute incomingRoad");
          connectionTag.incomingRoad = incomingRoad.getNodeValue().trim();
  
          Node connectingRoad = attributes.getNamedItem("connectingRoad");
          if (connectingRoad == null)
              throw new SAXException("LANE: missing attribute connectingRoad");
          connectionTag.connectingRoad = connectingRoad.getNodeValue().trim();
  
          Node contactPoint = attributes.getNamedItem("contactPoint");
          if (contactPoint == null)
              throw new SAXException("LANE: missing attribute contactPoint");
          else
          {
              if ("start".equals(contactPoint.getNodeValue().trim()))
                  connectionTag.contactPoint = ContactPointEnum.START;
              else if ("end".equals(contactPoint.getNodeValue().trim()))
                  connectionTag.contactPoint = ContactPointEnum.END;
              else
                  throw new SAXException("contactPoint is neither 'start' nor 'end' but: " + contactPoint.getNodeValue().trim());
          }
  
          for (Node laneLink : XMLParser.getNodes(node.getChildNodes(), "laneLink"))
          {
              NamedNodeMap attributes1 = laneLink.getAttributes();
  
              Node from = attributes1.getNamedItem("from");
              connectionTag.laneLinkFrom = Integer.parseInt(from.getNodeValue().trim());
  
             Node to = attributes1.getNamedItem("to");
             connectionTag.laneLinkTo = Integer.parseInt(to.getNodeValue().trim());
         }
 
         return connectionTag;
     }
 
     /** {@inheritDoc} */
     @Override
     public final String toString()
     {
         return "ConnectionTag [id=" + this.id + ", incomingRoad=" + this.incomingRoad + ", connectingRoad="
                 + this.connectingRoad + ", contactPoint=" + this.contactPoint + ", laneLinkFrom=" + this.laneLinkFrom
                 + ", laneLinkTo=" + this.laneLinkTo + "]";
     }
 }