import edu.neu.ccs.demeter.dj.*;
import java.util.*;
import edu.neu.ccs.demeter.*;
 class BuildParentEdgesVisitor extends Visitor {
  public BuildParentEdgesVisitor() {
    super();
    }
  public static BuildParentEdgesVisitor parse(java.io.Reader in) throws ParseException { return new Parser(in)._BuildParentEdgesVisitor();   }
  public static BuildParentEdgesVisitor parse(java.io.InputStream in) throws ParseException { return new Parser(in)._BuildParentEdgesVisitor();   }
  public static BuildParentEdgesVisitor parse(String s) {
    try { return parse(new java.io.StringReader(s)); }
    catch (ParseException e) {
      throw new RuntimeException(e.toString());
    }
    }
  
   public void before(Adjacency a) {
      // Create TraversalGraph which targets the alternation neighbors.
      TraversalGraph tg = new TraversalGraph(
         "from Adjacency bypassing ParentList to Alternat_ns",
         Main.cg
      );
      Alternat_ns alt = (Alternat_ns) tg.fetch(a);

      // If alt == null, then this Adjacency is not a superclass, no need
      // to continue.
      if (alt != null) {
         // Iterate through each alternation neighbor.
         Enumeration e = alt.get_alternat_ns().elements();
         while (e.hasMoreElements()) {
            // sc points to a subclass.
            Adjacency sc = Main.cdg.search(((Term) e.nextElement()).fetchIdent());
            Neighbors_wc wc = (Neighbors_wc) sc.get_ns();
            // Add a to sc's list of parents.
            if (wc.get_parents() != null) {
               wc.get_parents().get_ps().addElement(a);
            }
            else {
               wc.set_parents(new ParentList());
               wc.get_parents().set_ps(new Adjacency_List());
               wc.get_parents().get_ps().addElement(a);
            }
         }
      }
   }


    void universal_trv0_bef(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).before(this);
  }

    void universal_trv0_aft(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).after(this);
  }

    void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    universal_trv0_aft(_v_);
  }

}