package dbj.odmg;

import COM.POET.odmg.collection.*;
import java.util.Enumeration;

public class Book {
  String isbn_;
  String title_;
  double price_;
  Publisher publisher_;
  Category category_;
  VArrayOfObject authors_;
  int stock_;

  public Book (String isbn) {
    isbn_ = isbn;
    authors_ = new VArrayOfObject ();
  }

  public void setPrice (double p) {
    price_ = p;
  }

  public void setTitle (String s) {
    title_ = s;
  }

  public void setPublisher (Publisher p) {
    publisher_ = p;
  }

  public void addAuthor (Author a) {
    authors_.add (a);
  }

  public void setCategory (Category c) {
    category_ = c;
  }
	
  public void setStock (int num) {
    stock_ = num;
  }
	
  public double getPrice () {
    return price_;
  }

  public int getStock () {
    return stock_;
  }

  public boolean reduceStock (int num) {
    if (stock_ > num) {
      stock_ -= num;
      return true;
    }
    else
      return false;
  }
	
  public String toString () {
    StringBuffer buf = new StringBuffer ();
    Enumeration e = authors_.elements ();
    int i = 0, num = authors_.size ();
    while (e.hasMoreElements ()) {
      Author a = (Author) e.nextElement ();
      buf.append (a.toString ());
      if (++i < num)
        buf.append (", ");
    }
    buf.append (": " + title_ + "; " + isbn_ + "; " + price_ + 
                " [" + stock_ + "]");
    return buf.toString ();
  }
}