package org.opentrafficsim.road.network.factory.opendrive;
   
   import java.io.Serializable;
   
   import org.djunits.unit.LengthUnit;
   import org.djunits.value.vdouble.scalar.Length;
   import org.opentrafficsim.core.network.NetworkException;
   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 SignalReferenceTag implements Serializable
  {
      /** */
      private static final long serialVersionUID = 20150723L;
  
      /** Parameter s. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Length s = null;
  
      /** Parameter t. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Length t = null;
  
      /** Id. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      String id = null;
  
      /** Orientation. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      String orientation = null;
  
      /**
       * Parse the attributes of the road.type tag. The sub-elements are parsed in separate classes.
       * @param node Node; the node with signal information
       * @param parser OpenDriveNetworkLaneParser; the parser with the lists of information
       * @return the constructed SignalTag
       * @throws SAXException when parsing of the tag fails
       * @throws NetworkException when parsing of the tag fails
       */
      @SuppressWarnings("checkstyle:needbraces")
      static SignalReferenceTag parseSignalReference(final Node node, final OpenDriveNetworkLaneParser parser)
              throws SAXException, NetworkException
      {
          SignalReferenceTag signaReferencelTag = new SignalReferenceTag();
          NamedNodeMap attributes = node.getAttributes();
  
          Node s = attributes.getNamedItem("s");
          if (s != null)
              signaReferencelTag.s = new Length(Double.parseDouble(s.getNodeValue().trim()), LengthUnit.METER);
  
          Node t = attributes.getNamedItem("t");
          if (t != null)
              signaReferencelTag.t = new Length(Double.parseDouble(t.getNodeValue().trim()), LengthUnit.METER);
  
          Node id = attributes.getNamedItem("id");
          if (id != null)
              signaReferencelTag.id = id.getNodeValue().trim();
  
          Node orientation = attributes.getNamedItem("orientation");
          if (orientation != null)
              signaReferencelTag.orientation = orientation.getNodeValue().trim();
  
          return signaReferencelTag;
  
      }
  
      /** {@inheritDoc} */
      @Override
      public final String toString()
      {
          return "SignalReferenceTag [s=" + this.s + ", t=" + this.t + ", id=" + this.id + ", orientation=" + this.orientation
                  + "]";
      }
  }