import java.lang.*;
import java.io.*;
import edu.neu.ccs.demeter.dj.*;
import java.util.*;
import edu.neu.ccs.demeter.*;
abstract class Posting {
  protected Amount amount;
  public Amount get_amount() { return amount; }
  public void set_amount(Amount new_amount) { amount = new_amount; }
  protected Date date;
  public Date get_date() { return date; }
  public void set_date(Date new_date) { date = new_date; }
  public Posting() { super(); }
  public Posting(Amount amount, Date date) {
    super();
    set_amount(amount);
    set_date(date);
  }

    private static HashMap subclassMap = null;       //holds objects of all subclasses of posting

  private static void setUpSubclassMap() {

	/* populates the subclass table */

	subclassMap = new HashMap();

	subclassMap.put("+", new Credit());
	subclassMap.put("-", new Debit());

    }
  public static Posting prompt(String prompt) {

	/* This function will find an posting given by the user 
	   input : prompt - string used to prompt the user
	   output: a new posting described by the user */

	Posting returnPosting;

	char postType = Main.promptChar("Enter + for credit or - for debit");
	Amount amount = Amount.prompt("how much");
	Date date = Date.prompt("enter posting date");

	if (postType == '+') returnPosting = new Credit(amount, date);
	else returnPosting = new Debit(amount, date);

	return returnPosting;
    }
  void viewPosting() {
    PrintVisitor v0 = new PrintVisitor();
    v0.start();
    __trav_viewPosting(v0);
    v0.finish();
  }
  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_) {
    ((UniversalVisitor) _v_).before_amount(this, amount);
    amount.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_amount(this, amount);
    ((UniversalVisitor) _v_).before_date(this, date);
    date.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_date(this, date);
  }

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

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

  void everything_Bank_trv(PrintVisitor __v0) {
    ((UniversalVisitor) __v0).before_amount(this, amount);
    amount.everything_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_amount(this, amount);
    ((UniversalVisitor) __v0).before_date(this, date);
    date.everything_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_date(this, date);
  }

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

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

  void __trav_print_Bank_trv(PrintVisitor __v0) {
    ((UniversalVisitor) __v0).before_amount(this, amount);
    amount.__trav_print_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_amount(this, amount);
    ((UniversalVisitor) __v0).before_date(this, date);
    date.__trav_print_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_date(this, date);
  }

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

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

  void __trav_display_Bank_trv(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).before_amount(this, amount);
    amount.__trav_display_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_amount(this, amount);
    ((DisplayVisitor) __v0).before_date(this, date);
    date.__trav_display_Bank_trv(__v0);
    ((UniversalVisitor) __v0).after_date(this, date);
  }

  public void __trav_viewPosting(PrintVisitor __v0) {
    __trav_viewPosting_Posting_trv(__v0);
  }

  void __trav_viewPosting_Posting_trv_bef(PrintVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }

  void __trav_viewPosting_Posting_trv_aft(PrintVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }

  void __trav_viewPosting_Posting_trv(PrintVisitor __v0) {
    ((UniversalVisitor) __v0).before_amount(this, amount);
    amount.__trav_viewPosting_Posting_trv(__v0);
    ((UniversalVisitor) __v0).after_amount(this, amount);
    ((UniversalVisitor) __v0).before_date(this, date);
    date.__trav_viewPosting_Posting_trv(__v0);
    ((UniversalVisitor) __v0).after_date(this, date);
  }

}