import java.lang.*;
import java.io.*;
import edu.neu.ccs.demeter.dj.*;
import java.util.*;
import edu.neu.ccs.demeter.*;
class BusinessUnit_List implements java.util.Enumeration {
  protected Nonempty_BusinessUnit_List first;
  public Nonempty_BusinessUnit_List get_first() { return first; }
  public void set_first(Nonempty_BusinessUnit_List new_first) { first = new_first; }
  public BusinessUnit_List() { super(); }
  public BusinessUnit_List(Nonempty_BusinessUnit_List first) {
    super();
    set_first(first);
  }
  public static BusinessUnit_List parse(java.io.Reader in) throws ParseException { return new Parser(in)._BusinessUnit_List(); }
  public static BusinessUnit_List parse(java.io.InputStream in) throws ParseException { return new Parser(in)._BusinessUnit_List(); }
  public static BusinessUnit_List parse(String s) {
    try { return parse(new java.io.StringReader(s)); }
    catch (ParseException e) {
      throw new RuntimeException(e.toString());
    }
  }
  public void viewUnits() {

	/* This function will print all of the business units in the list,
	   skipping over the party information */

	BusinessUnit tempUnit;
	java.util.Enumeration en = this.elements();
      
	System.out.println(Main.divider);
	while (en.hasMoreElements()){
	    tempUnit = (BusinessUnit) en.nextElement();
	    tempUnit.viewUnit();
	}
    }
  public BusinessUnit findBusinessUnit(Index findMe, boolean display) {

	/* This function will look for a business unit based on index. 
	   input: findMe - the index of the unit we are looking for
	          display - If true, the unit will be displayed to the screen 
           output: the existing BusinessUnit object at Index */

	BusinessUnit currBU = null;	    //current Business Unit in the enumeration
	boolean found = false;	    //flag to know when to stop looking

	java.util.Enumeration en = this.elements();

	//search business units
	while (en.hasMoreElements() && !found) {
	    currBU = (BusinessUnit) en.nextElement();
	    found = currBU.get_index().get_index() == findMe.get_index();
          }

	if (!found) {
	    System.out.println("Business Unit " + findMe.get_index() + " could not be found");
	    currBU = null;
	}
	else if (display) currBU.viewUnit();
	
	return currBU;
    }
  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_);
    if (first != null) {
      ((UniversalVisitor) _v_).before_first(this, first);
      first.universal_trv0(_v_);
      ((UniversalVisitor) _v_).after_first(this, first);
    }
    universal_trv0_aft(_v_);
  }

  void everything_Bank_trv_bef(PrintVisitor __v0) {
    ((PrintVisitor) __v0).before(this);
  }

  void everything_Bank_trv_aft(PrintVisitor __v0) {
    ((PrintVisitor) __v0).after(this);
  }

  void everything_Bank_trv(PrintVisitor __v0) {
    everything_Bank_trv_bef(__v0);
    if (first != null) {
      ((UniversalVisitor) __v0).before_first(this, first);
      first.everything_Bank_trv(__v0);
      ((UniversalVisitor) __v0).after_first(this, first);
    }
    everything_Bank_trv_aft(__v0);
  }

  void __trav_print_Bank_trv_bef(PrintVisitor __v0) {
    ((PrintVisitor) __v0).before(this);
  }

  void __trav_print_Bank_trv_aft(PrintVisitor __v0) {
    ((PrintVisitor) __v0).after(this);
  }

  void __trav_print_Bank_trv(PrintVisitor __v0) {
    __trav_print_Bank_trv_bef(__v0);
    if (first != null) {
      ((UniversalVisitor) __v0).before_first(this, first);
      first.__trav_print_Bank_trv(__v0);
      ((UniversalVisitor) __v0).after_first(this, first);
    }
    __trav_print_Bank_trv_aft(__v0);
  }

  void __trav_display_Bank_trv_bef(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).before(this);
  }

  void __trav_display_Bank_trv_aft(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).after(this);
  }

  void __trav_display_Bank_trv(DisplayVisitor __v0) {
    __trav_display_Bank_trv_bef(__v0);
    if (first != null) {
      ((DisplayVisitor) __v0).before_first(this, first);
      first.__trav_display_Bank_trv(__v0);
      ((UniversalVisitor) __v0).after_first(this, first);
    }
    __trav_display_Bank_trv_aft(__v0);
  }


  private Nonempty_BusinessUnit_List tail;
  public void addElement(BusinessUnit e) { 
    checktail(); 
    if (tail == null) {
      first = new Nonempty_BusinessUnit_List(e,null); tail = first;
    } else {
	tail.set_next(new Nonempty_BusinessUnit_List(e,null)); tail = tail.get_next();
    }
  }

  public void push(BusinessUnit e) { first = new Nonempty_BusinessUnit_List(e,first); }

  public java.util.Enumeration elements() { return new BusinessUnit_List(first); } 

  public int size() {
    int i= 0;
    for (java.util.Enumeration e=elements(); e.hasMoreElements(); i++)
	e.nextElement();
    return i;
  }
  public boolean isEmpty() { return (first == null); }

  public boolean hasMoreElements() { return (first != null); }

  public Object nextElement() {
    BusinessUnit car = first.get_it();
    first = first.get_next();
    return (Object) car;
  }

  private void checktail() {
    if (tail == null && first != null) {
	tail = first;
	while (tail.get_next() != null) tail = tail.get_next();
    }
  }
  public boolean contains(BusinessUnit e) {
    java.util.Enumeration en = this.elements();
    while (en.hasMoreElements())
	if (e.equals((BusinessUnit) en.nextElement())) return true;
    return false;
  }

}