www.pudn.com > Java_UML_library.rar > Item.java

// 
//  Unified Library Application 
//  Case study in Unified Modeling Language Toolkit 
// 
//  Item.java: represents a item, a physical instance 
//  of a Title. The library can have several items of one 
//  title. 
// 
//  Copyright (c) 1998 John Wiley & Sons, Inc. All rights reserved. 
//  Reproduction or translations of this work beyond that permitted 
//  in Section 117 of the 1976 United States Copyright Act without 
//  the express written permission of the copyright owner is unlawful. 
//  Requests for further information should be addressed to Permissions 
//  Department, John Wiley & Sons, Inc. The purchaser may make back-up 
//  copies for his/her own use only and not for distribution or resale. 
//  The Publisher assumes no responsibility for errors, omissions, or 
//  damages, caused by the use of these programs of from the use of the 
//  information contained herein. 
 
package bo; 
import util.ObjId; 
import db.*; 
import java.io.*; 
public class Item extends Persistent 
{ 
    private int itemid; 
    private ObjId title; 
    private ObjId loan = new ObjId(); 
    public Item() 
    { 
    } 
    public Item(ObjId titleid, int idno) 
    { 
        title = titleid; 
        itemid = idno; 
    } 
    public int getId() { return itemid; } 
    public String getTitleName() 
    { 
        Title t = (Title) Persistent.getObject(title); 
        return t.getTitle(); 
    } 
    public void setLoan(ObjId loanid) 
    { 
        loan = loanid; 
    } 
    public Loan getLoan() 
    { 
        Loan ret = (Loan) Persistent.getObject(loan); 
        return ret; 
    } 
    public boolean isBorrowed() 
    { 
        if (loan.getName().equals("NotSet")) 
            return false; 
        else 
            return true; 
    } 
    public void write(RandomAccessFile out) 
        throws IOException 
    { 
        out.writeInt(itemid); 
        title.write(out); 
        loan.write(out); 
    } 
    public void read(RandomAccessFile in) 
        throws IOException 
    { 
        itemid = in.readInt(); 
        title = new ObjId(); 
        title.read(in); 
        loan.read(in); 
    } 
}