gallerypainting.java

该程序有17个java源文件。是经典奥斯波特艺术品商人软件工程例子

	}
  } // writeBought

//	-------------------------------------------------------------------------------------------------------------------

  public void addNewSale ()
  //
  //	 records that a gallery painting has been sold
  //
  throws IOException {

    DataInputStream inTmp, inCopy;			// stream objects used for file input
    DataOutputStream outTmp, outCopy;		// stream objects used for file output
    boolean found;						    // indicates if object insertion point found
    GalleryPainting	tempGallery;	        // temporary object used for file copying

    found = false;

	inTmp = new DataInputStream(new BufferedInputStream(new FileInputStream("sold.dat")));
	outTmp = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("tempS.dat")));
	tempGallery = new GalleryPainting();

	  //
	  // copy the current sold file to a temporary file
	  //
	  while (inTmp.available() != 0)
	  {

		  //
		  // read a temporary gallery object from the sold file
		  //
		  tempGallery.readSold (inTmp);

		  //
		  // write the temporary gallery object to the temporary file
		  //
		  tempGallery.writeSold (outTmp);

	  } // while (inTmp.available() != 0)

    inTmp.close ();
    outTmp.close ();

	inCopy = new DataInputStream(new BufferedInputStream(new FileInputStream("tempS.dat")));
	outCopy = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("sold.dat")));

      //
	  // copy the temporary file to a new sold file
	  // while inserting the painting object in the proper location
	  //
	  while (inCopy.available() != 0)
	  {
		  //
		  // read a temporary gallery object from the temporary file
		  //
		  tempGallery.readSold (inCopy);

		  //
		  // write the proper object to the sold file
		  //
		  if ((classification.compareTo(tempGallery.classification) <= 0) &&
			  (tempGallery.saleDate.compare(saleDate)   <= 0) &&
			  !found)
		  {
			  //
			  // write the gallery object to the sold file
			  //
			  writeSold (outCopy);

			  //
			  // write the temporary gallery object to the sold file
			  //
			  tempGallery.writeSold (outCopy);

			  found = true;
		  }
		  else
			  tempGallery.writeSold (outCopy);

	  } // while (inCopy.available() != 0)

    //
    // write the gallery object to the end of the sold file
    //
    if (!found)
	  writeSold (outCopy);

    inCopy.close ();
    outCopy.close ();

  } // addNewSale

//	-------------------------------------------------------------------------------------------------------------------

  public void sell ()
  //
  //	 allows user to sell a painting found in the gallery
  //
  throws IOException {

	DataInputStream inSold, inGallery;	// stream objects used for file input
	boolean found;	         			// indicates if painting already in gallery
	boolean alreadySold;		       	// indicates if painting already sold
	String tempFn;				        // tempFn, tempLn, and tempTitle
	String tempLn;				        // store temporary information about
	String tempTitle;			        // the painting to be sold, namely first name, last name, and title, resp.

	UserInterface.clearScreen ();

	//
	// retrieve information about the painting desired to be sold
	//
	System.out.println("\n\nPlease enter the following information describing the painting:\n");
	System.out.println("Note: - Use an underscore in place of any spaces.");
	System.out.println("      - Do not leave any request blank.\n\n");

	System.out.print("Enter the FIRST name of the artist (append ? if uncertain): ");
	tempFn = UserInterface.getString();

	System.out.print( "Enter the LAST name of the artist (append ? if uncertain): ");
	tempLn = UserInterface.getString();

	System.out.print( "Enter the TITLE of the painting (append ? if uncertain): ");
	tempTitle = UserInterface.getString();

	alreadySold = false;

	inSold = new DataInputStream(new BufferedInputStream(new FileInputStream("sold.dat")));

	  //
	  // determine if the desired painting has already been sold
	  //
	  while (inSold.available() != 0)
	  {
	    //
	    // read a gallery object from the sold file
	    //
	    readSold (inSold);

	    //
	    // check if there is a match with the gallery object
		  //
		  if ((UserInterface.compareStr (firstName, tempFn) == 0) &&
			  (UserInterface.compareStr (lastName, tempLn)  == 0) &&
			  (UserInterface.compareStr (title, tempTitle)  == 0))
			  {
				alreadySold = true;
				break;
			  }

	  } // while (inSold.available() != 0)

	  inSold.close ();

    if (alreadySold)
      System.out.println("\n\nThe painting you described has already been sold!\n");
    else
    {
      found = false;

	  inGallery = new DataInputStream(new BufferedInputStream(new FileInputStream("gallery.dat")));

	    //
	    // check to make sure that the desired painting
	    // actually exists in the gallery
	    //
	    while (inGallery.available() != 0)
	    {
	  	  //
		  // read a gallery object from the gallery file
		  //
		  readBought (inGallery);

		  //
		  // check if there is a match with the desired painting
		  //
		  if ((UserInterface.compareStr (firstName, tempFn) == 0) &&
			  (UserInterface.compareStr (lastName, tempLn) == 0) &&
			  (UserInterface.compareStr (title, tempTitle) == 0))
		  {
			found = true;
			break;
	      }

	    } // while (inGallery.available() != 0)

		inGallery.close ();

	  if (found == true)
	  {
	    System.out.println("\n\nPlease enter the following sale information:\n\n");

	    saleDate = Date.currentDate;

	    System.out.print("Enter the NAME of the buyer: ");
	    buyerName = UserInterface.getString();

	    System.out.print( "Enter the ADDRESS of the buyer: ");
	    buyerAddr = UserInterface.getString();

	    System.out.print("Enter the selling PRICE: ");
	    sellPrice = UserInterface.getDouble();

	    addNewSale();
        UserInterface.addArtist(firstName, lastName);

		System.out.print("\n\nThe sale has been recorded.");
	  }
	  else
	  {
	    System.out.println("\n\nThe painting you described cannot be found in the gallery.");
	    System.out.println("Please make sure you entered the information correctly.");
	    System.out.println("Proper case is required.");
	  }

	} //  else (alreadySold != TRUE)

	System.out.println("\n\n Press <ENTER> to return to main menu...");
	UserInterface.pressEnter ();

  } // sell

//	-------------------------------------------------------------------------------------------------------------------

  public void readSold (DataInputStream fileName)	// stream object where gallery information is read
  //
  //	 reads a sold gallery object from fileName
  //     Note: Java serialization could be used as an alternative to this approach
  //
  throws IOException {

    String tempDate;

    classification = fileName.readUTF();
	firstName = fileName.readUTF();
	lastName = fileName.readUTF();
	title = fileName.readUTF();
	tempDate = fileName.readUTF();
	paintingDate = new Date();
	paintingDate.parseDate(tempDate);
	tempDate = fileName.readUTF();
	purchaseDate = new Date();
	purchaseDate.parseDate(tempDate);
	tempDate = fileName.readUTF();
	saleDate = new Date();
	saleDate.parseDate(tempDate);
	medium = fileName.readUTF();
	subject = fileName.readUTF();
	sellerName = fileName.readUTF();
	buyerName = fileName.readUTF();
	sellerAddr = fileName.readUTF();
	buyerAddr = fileName.readUTF();
	algPrice = fileName.readDouble();
	purchasePrice = fileName.readDouble();
	targetPrice = fileName.readDouble();
	sellPrice = fileName.readDouble();
	height = fileName.readDouble();
	width = fileName.readDouble();

  } // readSold

//	-------------------------------------------------------------------------------------------------------------------

  public void writeSold (DataOutputStream fileName)  // stream object where gallery information is written
  //
  //	 writes a sold gallery object to fileName
  //     Note: Java serialization could be used as an alternative to this approach
  //
  throws IOException {

	  fileName.writeUTF(classification);
	  fileName.writeUTF(firstName);
	  fileName.writeUTF(lastName);
	  fileName.writeUTF(title);
	  fileName.writeUTF(paintingDate.toString());
	  fileName.writeUTF(purchaseDate.toString());
	  fileName.writeUTF(saleDate.toString());
	  fileName.writeUTF(medium);
	  fileName.writeUTF(subject);
	  fileName.writeUTF(sellerName);
	  fileName.writeUTF(buyerName);
	  fileName.writeUTF(sellerAddr);
	  fileName.writeUTF(buyerAddr);
	  fileName.writeDouble(algPrice);
	  fileName.writeDouble(purchasePrice);
	  fileName.writeDouble(targetPrice);
	  fileName.writeDouble(sellPrice);
	  fileName.writeDouble(height);
	  fileName.writeDouble(width);

  } // writeSold

} // class GalleryPainting