datamodel.java

《j2ee经典实例详解》的源代码。原书无附带光盘。介绍的是一个在线银行系统的例子。绝对难得

/*
 * Copyright (c) 2005 Sun Microsystems, Inc.  All rights reserved.  U.S.
 * Government Rights - Commercial software.  Government users are subject
 * to the Sun Microsystems, Inc. standard license agreement and
 * applicable provisions of the FAR and its supplements.  Use is subject
 * to license terms.
 *
 * This distribution may include materials developed by third parties.
 * Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks
 * or registered trademarks of Sun Microsystems, Inc. in the U.S. and
 * other countries.
 *
 * Copyright (c) 2005 Sun Microsystems, Inc. Tous droits reserves.
 *
 * Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel
 * commercial. Les utilisateurs gouvernementaux sont soumis au contrat de
 * licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions
 * en vigueur de la FAR (Federal Acquisition Regulations) et des
 * supplements a celles-ci.  Distribue par des licences qui en
 * restreignent l'utilisation.
 *
 * Cette distribution peut comprendre des composants developpes par des
 * tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE
 * sont des marques de fabrique ou des marques deposees de Sun
 * Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
 */


package com.sun.ebank.appclient;

import java.math.BigDecimal;
import java.util.ResourceBundle;
import java.util.Date;
import java.util.ArrayList;
import java.rmi.RemoteException;
import javax.naming.InitialContext;
import javax.swing.JTextField;
import javax.swing.JOptionPane;
import com.sun.ebank.ejb.customer.CustomerController;
import com.sun.ebank.ejb.customer.CustomerControllerHome;
import com.sun.ebank.ejb.exception.CustomerNotFoundException;
import com.sun.ebank.ejb.account.AccountController;
import com.sun.ebank.ejb.account.AccountControllerHome;
import com.sun.ebank.ejb.exception.AccountNotFoundException;
import com.sun.ebank.ejb.exception.IllegalAccountTypeException;
import com.sun.ebank.ejb.exception.CustomerInAccountException;
import com.sun.ebank.ejb.exception.InvalidParameterException;
import com.sun.ebank.util.CustomerDetails;
import com.sun.ebank.util.AccountDetails;
import com.sun.ebank.util.EJBGetter;


public class DataModel {
    //Private EJB variables
    private static CustomerController customer;
    private static AccountController account;

    //Private instance variables
    private BankAdmin frame;
    private ResourceBundle messages;
    private int currentFunction;
    private String returned;
    private Date timestamp;

    //Protected instance variables
    protected String first;

    //Protected instance variables
    protected String last;

    //Protected instance variables
    protected String mid;

    //Protected instance variables
    protected String str;

    //Protected instance variables
    protected String cty;

    //Protected instance variables
    protected String st;

    //Protected instance variables
    protected String zp;

    //Protected instance variables
    protected String tel;

    //Protected instance variables
    protected String mail;

    //Protected instance variables
    protected String descrip;

    //Protected instance variables
    protected String credit;

    //Protected instance variables
    protected String type;

    //Protected instance variables
    protected String bal;

    //Protected instance variables
    protected String begbal;

    //Protected instance variables
    protected String custID;

    //Protected instance variables
    protected String actID;
    protected BigDecimal balance;
    protected BigDecimal creditline;
    protected BigDecimal beginbalance;
    protected BigDecimal bigzero = new BigDecimal("0.00");
    protected boolean checkbal;
    protected boolean checkbegbal;

    //Constructor
    public DataModel(BankAdmin frame, ResourceBundle messages) {
        this.frame = frame;
        this.messages = messages;

        //Look up and create CustomerController bean
        try {
            CustomerControllerHome customerControllerHome =
                EJBGetter.getCustomerControllerHome();
            customer = customerControllerHome.create();
        } catch (Exception NamingException) {
            NamingException.printStackTrace();
        }

        //Look up and create AccountController bean
        try {
            AccountControllerHome accountControllerHome =
                EJBGetter.getAccountControllerHome();
            account = accountControllerHome.create();
        } catch (Exception NamingException) {
            NamingException.printStackTrace();
        }
    }

    private String getData(JTextField component) {
        String text;
        String trimmed;

        if (component.getText()
                         .length() > 0) {
            text = component.getText();
            trimmed = text.trim();

            return trimmed;
        } else {
            text = null;

            return text;
        }
    }

    protected int checkActData(String returned, int currentFunction) {
        this.currentFunction = currentFunction;
        this.returned = returned;

        if (currentFunction == 6) { //remove account
            this.actID = getData(frame.account);
            this.custID = getData(frame.customer);
            frame.clearMessages(1);

            if ((this.custID != null) && (this.actID != null)) {
                int success = writeData();

                return success;
            } else {
                frame.messlab5.setText(messages.getString(
                        "MissingRequiredException"));

                return 1;
            }
        } else { // create account

            //Retrieve data from UI
            this.descrip = getData(frame.descrip);
            this.bal = getData(frame.bal);
            this.credit = getData(frame.credit);
            this.begbal = getData(frame.begbal);
            this.custID = getData(frame.cust);

            //Get type
            if (frame.savingsact.isSelected()) {
                this.type = "Savings";
            } else if (frame.checkingact.isSelected()) {
                this.type = "Checking";
            } else if (frame.creditact.isSelected()) {
                this.type = "Credit";
            } else if (frame.mnymktact.isSelected()) {
                this.type = "Money Market";
            } else {
                this.type = null;
            }

            frame.clearMessages(1);

            if (this.begbal != null) {
                checkbegbal = begbal.equals("0");
            }

            //See if user pressed Return after entering
            //beginning balance
            if (this.bal != null) {
                checkbal = bal.equals("0");
            }

            if (checkbal == true) {
                String begbalstring = frame.begbal.getText();

                //Assign beginning balance to balance
                this.bal = begbalstring;
            }

            //Convert balance, begin balance, and credit line
            //String values to BigDecimal types for
            //writing to the database
            balance = new BigDecimal(bal);
            creditline = new BigDecimal(credit);
            beginbalance = new BigDecimal(begbal);

            if ((this.custID != null) &&
                    (this.begbal != null) &&
                    (this.type != null) &&
                    (checkbegbal == false)) {
                int success = writeData();

                return success;
            } else {
                frame.messlab5.setText(messages.getString(
                        "MissingRequiredException"));

                return 1;
            }
        }
    }

    protected int checkCustData(String returned, int currentFunction) {
        this.currentFunction = currentFunction;
        this.returned = returned;

        int i;
        int j;
        int k;

        this.last = getData(frame.lname);
        this.first = getData(frame.fname);
        this.mid = getData(frame.mi);
        this.str = getData(frame.street);
        this.cty = getData(frame.city);
        this.st = getData(frame.state);
        this.zp = getData(frame.zip);
        this.tel = getData(frame.phone);
        this.mail = getData(frame.e);

        frame.clearMessages(1);

        if ((last != null) &&
                (first != null) &&
                (str != null) &&
                (cty != null) &&
                (st != null)) {
            i = 0;
        } else {
            frame.messlab5.setText(messages.getString(
                    "MissingRequiredException"));
            i = 1;
        }