//-------------------------------------------------------------------
// Program P2 Q1
// 
// This program simulates a small database of book reviews. I assume
// that there only two types of review possible.  
//
// Author : Wei Tsang Ooi
// Date   : 11 July 1999
//-------------------------------------------------------------------

//-------------------------------------------------------------------
// class Book
// 
// This class represents a book in our book review database.  It 
// contains the title of the bok, the year of publication, and 
// reviewer notes.
//-------------------------------------------------------------------

class Book {

	private String title;           // title of the book
	private int year;               // year of publication
	private String notes;           // reviewer notes about this book.
	private String summary;         // summary of this book.

	//---------------------------------------------------------------
	// constructor
	// 
	// input : bookTitle - title of this book.
	//         pubYear - the year this book is published.
	//         summaryLine - the summary of this book.
	//---------------------------------------------------------------

	public Book(String bookTitle, int pubYear, String summaryLine)
	{
		title = bookTitle;
		year = pubYear;
		notes = "No review available";
		summary = summaryLine;
	}

	//---------------------------------------------------------------
	// showReview
	// 
	// print out an error message since reviews are available for
	// specific type of books only.
	//---------------------------------------------------------------

	public void showReview()
	{
		System.out.println("ERROR : No review for this book.");
	}


	//---------------------------------------------------------------
	// toString
	// 
	// print the title, year and summary of this book.
	//---------------------------------------------------------------
		
	public String toString()
	{
		return "TITLE : " + title + "\nYEAR : " + year + "\n" +
			"SUMMARY : " + summary;
	}


	//---------------------------------------------------------------
	// static describe
	// 
	// input  : a Book object
	// print the title, year, summary and review of this book.
	//---------------------------------------------------------------
		
	public static void describe(Book book)
	{
		System.out.println(book.toString());
		book.showReview();
		System.out.println("");
	}

	//---------------------------------------------------------------
	// describe
	// 
	// alternate implementation of describe
	//---------------------------------------------------------------

	public void describe()
	{
		System.out.println(toString());
		showReview();
		System.out.println("");
	}
}


//-------------------------------------------------------------------
// class Literary
// 
// This class represents a book in with good review.  
//-------------------------------------------------------------------

class Literary extends Book {

	//-------------------------------------------------------------------
	// constructor
	// 
	// Simply call the Book's constructor
	//-------------------------------------------------------------------

	public Literary(String name, int year, String summary)
	{
		super(name, year, summary);
	}


	//-------------------------------------------------------------------
	// showReview
	// 
	// Print out a good review.
	//-------------------------------------------------------------------

	public void showReview ()
	{
		System.out.println("REVIEW : Fascinating. Two thumbs up !");
	}

};


//-------------------------------------------------------------------
// class Trashy
// 
// This class represents a book in with bad review.  
//-------------------------------------------------------------------

class Trashy extends Book {

	//-------------------------------------------------------------------
	// constructor
	// 
	// Simply call the Book's constructor
	//-------------------------------------------------------------------

	public Trashy(String name, int year, String summary)
	{
		super(name, year, summary);
	}


	//-------------------------------------------------------------------
	// showReview
	// 
	// Print out a bad review.
	//-------------------------------------------------------------------

	public void showReview ()
	{
		System.out.println("REVIEW : This is a bad bad book.");
	}
};


//-------------------------------------------------------------------
// class BookReviews
// 
// This simple class demostrates the use of the class Literary and
// Trashy.
//-------------------------------------------------------------------

class BookReviews {

	//-------------------------------------------------------------------
	// main
	// 
	// This method creates three books, and print out their descriptions.
	//-------------------------------------------------------------------

	public static void main(String argv[])
	{
		// Create an object of class Book.  This will create
		// a book that does not have any review associated with it.

		Book behave = new Book(
			"Oh ! Behave.", 
			1991, 
			"How to make your children behave at dinner table.");

		// Create a lietrary book and a trashy book.

		Literary hannibal = new Literary(
			"Hannibal", 
			1999, 
			"Tells the story about the man who destroy Rome.");

		Trashy java = new Trashy(
			"Java : I Love It", 
			1939, 
			"A traveller's diary about the exotic Java island in " +
			"South East Asia.");

		// Now print out their descriptions: title, year, summary
		// and reviews if available.

		Book.describe(behave);
		Book.describe(hannibal);
		Book.describe(java);
	}
}