//
   // Generated by JTB 1.3.2
   //
   
   package com.randomnoun.common.jexl.ast;
   
   import java.util.*;
   
   /**
   * Represents an optional grammar list, e.g. ( A )*
   */
  public class NodeListOptional implements NodeListInterface {
     public NodeListOptional() {
        nodes = new Vector<Node>();
     }
  
     public NodeListOptional(Node firstNode) {
        nodes = new Vector<Node>();
        addNode(firstNode);
     }
  
     public void addNode(Node n) {
        nodes.addElement(n);
     }
  
     public Enumeration<Node> elements() { return nodes.elements(); }
     public Node elementAt(int i)  { return nodes.elementAt(i); }
     public int size()             { return nodes.size(); }
     public boolean present()      { return nodes.size() != 0; }
     public void accept(com.randomnoun.common.jexl.visitor.Visitor v) {
        v.visit(this);
     }
     public <R,A> R accept(com.randomnoun.common.jexl.visitor.GJVisitor<R,A> v, A argu) {
        return v.visit(this,argu);
     }
     public <R> R accept(com.randomnoun.common.jexl.visitor.GJNoArguVisitor<R> v) {
        return v.visit(this);
     }
     public <A> void accept(com.randomnoun.common.jexl.visitor.GJVoidVisitor<A> v, A argu) {
        v.visit(this,argu);
     }
  
     public Vector<Node> nodes;
  }