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

package Osbert;
import java.io.*;

public class GalleryPainting extends Painting
{

  private static double TARGET_MARKUP = 2.15;

  protected String classification;	// gallery classification type
  protected Date   purchaseDate;	// date painting was purchased
  protected Date   saleDate;		// date painting was sold
  protected String sellerName;		// full name of seller
  protected String buyerName;		// full name of painting buyer
  protected String sellerAddr;		// address of seller
  protected String buyerAddr;		// address of buyer
  protected double  algPrice;		// price determined by algorithm
  protected double  purchasePrice;	// actual purchase price
  protected double  targetPrice;	// target selling price
  protected double  sellPrice;		// actual selling price

  // getters-setters for GalleryPainting
  public String getClassification ()		{ return classification; }
  public void   setClassification (String c) { classification = c; }
  public Date   getPurchaseDate ()			{ return purchaseDate; }
  public void   setPurchaseDate (Date d)	{ purchaseDate = d; }
  public Date   getSaleDate ()				{ return saleDate; }
  public void   setSaleDate (Date d)		{ saleDate = d; }
  public String getSellerName ()			{ return sellerName; }
  public void   setSellerName (String n)	{ sellerName = n; }
  public String getBuyerName ()				{ return buyerName; }
  public void   setBuyerName (String n)		{ buyerName = n; }
  public String getSellerAddr ()			{ return sellerAddr; }
  public void   setSellerAddr (String a)	{ sellerAddr = a; }
  public String getBuyerAddr ()				{ return buyerAddr; }
  public void   setBuyerAddr (String a)		{ buyerAddr = a; }
  public double  getAlgPrice ()				{ return algPrice; }
  public void   setAlgPrice (double p)		{ algPrice = p; }
  public double  getPurchasePrice ()		{ return purchasePrice; }
  public void   setPurchasePrice (double p)	{ purchasePrice = p; }
  public double  getTargetPrice ()			{ return targetPrice; }
  public void   setTargetPrice (double p)	{ targetPrice = p; }
  public double  getSellPrice ()			{ return sellPrice; }
  public void   setSellPrice (double p)		{ sellPrice = p; }


  public void getGalleryInformation ()
  //
  //	 retrieves gallery painting information
  //
  {
	System.out.println("\n");

	purchaseDate = Date.currentDate;

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

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

	System.out.print("Enter the purchase PRICE of the painting: ");
	purchasePrice = UserInterface.getDouble();

	targetPrice = purchasePrice * TARGET_MARKUP;

  } // getGalleryInformation

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

  public void addNewPainting ()
  //
  //	 inserts a gallery object in the proper place
  //
  throws IOException {

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

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

	  //
	  // copy the current gallery file to a temporary file
	  //
	  while (inTmp.available() != 0)
	  {
		  //
		  // read the temporary gallery object from the gallery file
		  //
		  tempGallery.readBought (inTmp);

		  //
		  // write the temporary gallery object to a temporary file
		  //
		  tempGallery.writeBought (outTmp);
	  }

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

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

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

		  //
		  // write the proper object to the gallery file
		  //
		  if ((classification.compareTo(tempGallery.classification) <= 0) &&
			  (purchaseDate.compare(tempGallery.purchaseDate) <= 0) && !found)
		  {
			  //
			  // write the gallery爋bject to the gallery file
			  //
			  writeBought (outCopy);

			  //
			  // write the temporary gallery object to the gallery file
			  //
			  tempGallery.writeBought (outCopy);
			  found = true;

		  }
		  else
			  tempGallery.writeBought (outCopy);


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

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

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

  } // addNewPainting

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

  public void buy ()
  //
  //	 allows user to buy a painting
  //
  throws IOException {

    DataInputStream inFile;			// stream object used for file input
    char ch;						// holds user response to Y/N question
    boolean found = false;			// indicates if painting already in gallery
    GalleryPainting	tempGallery;	// temporary object used for file reading

    getDescription ();

	inFile = new DataInputStream(new BufferedInputStream(new FileInputStream("gallery.dat")));
    tempGallery = new GalleryPainting();

	  //
	  // determine if the gallery object already exists in the gallery
	  //
	  while (inFile.available() != 0)
	  {
		//
		// read a temporary gallery object from the gallery file
		//
		tempGallery.readBought (inFile);

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

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

    inFile.close ();

	if (found == true)
	{
      System.out.println("\n\nThe painting you described has already been purchased!\n");
    }
	else
	{

	  if(classification.compareTo("Masterpiece") == 0)
		  algPrice = ComputeMasterpiecePrice.getAlgorithmPrice(this);
	  if(classification.compareTo("Masterwork") == 0)
		  algPrice = ComputeMasterworkPrice.getAlgorithmPrice(this);
	  if(classification.compareTo("Other") == 0)
		  algPrice = ComputeOtherPrice.getAlgorithmPrice(this);

	  System.out.println("\n");

	  if (algPrice > 0)
	  {
	    System.out.println("The algorithm has determined the maximum offering price to be:");
	    System.out.println("$" + algPrice + " million dollars.\n");

	    System.out.print("Do you want to purchase this painting (Y/N)? ");

	    ch = UserInterface.getChar();

	    if ((ch == 'Y') || (ch == 'y'))
	    {
		  getGalleryInformation();
		  addNewPainting();
	    }
	  }
	  else
		  System.out.println("The algorithm has suggested that you should not buy this painting.");
	}

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

  } // buy

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

  public void readBought (DataInputStream fileName) // stream object where gallery information is read
  //
  //	 reads a 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);
	medium = fileName.readUTF();
	subject = fileName.readUTF();
	sellerName = fileName.readUTF();
	sellerAddr = fileName.readUTF();
	algPrice = fileName.readDouble();
	purchasePrice = fileName.readDouble();
	targetPrice = fileName.readDouble();
	height = fileName.readDouble();
	width = fileName.readDouble();

  } // readBought

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

  public void writeBought (DataOutputStream fileName) // stream object where gallery information is written
  //
  //	 writes a gallery object to fileName
  //     Note: Java serialization could be used as an alternative to this approach
  //
  throws IOException {
	if(classification.length() > 0)
	{
	  fileName.writeUTF(classification);
	  fileName.writeUTF(firstName);
	  fileName.writeUTF(lastName);
	  fileName.writeUTF(title);
	  fileName.writeUTF(paintingDate.toString());
	  fileName.writeUTF(purchaseDate.toString());
	  fileName.writeUTF(medium);
	  fileName.writeUTF(subject);
	  fileName.writeUTF(sellerName);
	  fileName.writeUTF(sellerAddr);
	  fileName.writeDouble(algPrice);
	  fileName.writeDouble(purchasePrice);
	  fileName.writeDouble(targetPrice);
	  fileName.writeDouble(height);
	  fileName.writeDouble(width);