simple java question

Atomic Pineapple

there is probably something really stupid I over looked here but with family issues at home and 6 assignments to hand in , I just cant concentrate on this.

I'm using JDeveloper to build a website.

I have a LoginSessionBean that holds a id for a session of the website, I have another bean that requires the id from the LoginSessionBean to use in a method, I was wondering whats the correct way to get the id from one bean to the other?

thanks (sorry for it being a noob question)

Skud

i found this... might help : http://forum.java.sun.com/thread.jspa?threadID=740653&messageID=4248006

if not post some code

Atomic Pineapple

ok I tried to work the code from the sun site into my site but it wont work, this code is for my first bean, it lets a user log on and gets there username, password and dealer(which is an integer) from the database

package view.beans;

import java.io.FileInputStream;

import java.io.IOException;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.faces.context.FacesContext;
Import javax.servlet.http.HttpServletRequest;
mport sd3004project.model.business.Users;
import sd3004project.model.dao.PrimaryKeyGenerator;
import sd3004project.model.dao.UserDao;

import sd3004project.model.exceptions.DaoException;

import view.utils.ScopeUtility;

public class LoginSessionBean  {
    
    private String username;
    private String password;
    private int dealer;
   
        UserDao dao = null ;
        
    public LoginSessionBean() throws DaoException {
        dao = new UserDao() ;
        
    }

    public void setUserName(String userName) {
        this.username = userName;
    }

    public String getUserName() {
        return username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getPassword() {
        return password;
    }
    
    public void setUsername(String username) {
        this.username = username;
    }

    public String getUsername() {
        return username;
    }


    public String verifyLoginButton() {
        Users user = null ;
        try
        {
            user = dao.findUserByCodeNamePassword(username, password) ;
        }
        catch(DaoException e) {
            HttpServletRequest request = ScopeUtility.getRequest() ;
            request.setAttribute("error", "Verify login " + e.getMessage() );
            return "error" ;
        }
        if (user == null) {
            userLoggedIn = false ;
            adminLoggedIn = false ;
            loginAttempt = true ;
            return null ;   // pack to same page
        }
        else
        {
            
            username = user.getUsername();
            password = user.getPassword();
            dealer = user.getDealer();
            
         
            if (dealer > 0)
                adminLoggedIn = true ;
            else
                userLoggedIn = true ;
        
            userId = user.getUserid() ;
            
            return "success" ;
        }
    }

This is the second bean I want the dealer variable/attribue from the first bean to be able to be used in the second bean in the method findAllCarsByDealer(dealer);

package view.beans;

import java.util.ArrayList;
import java.util.List;



import sd3004project.model.business.Car;
import sd3004project.model.dao.CarsDao;

import sd3004project.model.exceptions.DaoException;

import view.utils.ScopeUtility;

public class AmendCar{
    private static List<Car> cars = null ;
    CarsDao dao = null ;
    int dealer = 0;
    
    

    public AmendCar() throws DaoException {
        dao = new CarsDao() ;
    }

    public void setCars(List<Car> cars) {
        this.cars = cars;
    }

    public List<Car> getCars() throws DaoException {
        
        if (cars == null)
            cars = dao.findAllCarsByDealer(dealer) ; 
              
        return cars;/*
         if (cars == null)
             cars = dao.findAllCarsByDealer(10) ; 
               
         return cars;*/
    }

so when a user logs on there dealer (this should be called dealerNumber) will be pulled from the database and saved for the session, so dealer 1 is logged on, I wanted that dealer number 1 to be able to be inserted into the method findAllCarsByDealer(dealer);

marco_polo

Where do you create the beans is it in a JSPpage?

The easiest way would be to exposes a getDealer() method in the first class and add a second constructor in the Amend car class. as follows

public class LoginSessionBean  {

    .......

    public String getDealerID() {
            return dealerID;
    }

}


public class AmendCar{

......

    public AmendCar(int dealer) throws DaoException {
        this.dealer=dealer;
        dao = new CarsDao() ;
    }
}

Use it in your code that calls the beans as follows

    LoginSessionBean lsb = new LoginSessionBean();
    lsb.setUsername();
    lsb.serPassword();
    lsb.verifyLoginButton();

    AmendCar=new AmendCar(lsb.getDealerID());

Atomic Pineapple

The two beans are just java classes out on there own,

Then I use the variables in the JSP's

for example i use the cars list to display the cars in a data table

<h:dataTable value="#{AmendCar.cars}" var="c" 
                                     styleClass="news_text" width="200">


............

</h:dataTable>

I'm not sure how I would implement your code, would I put it directly into the JSP?

marco_polo

Not programmed with JSPs for a while so I forget how to use alot of the bean tags etc, but for a quick and dirty hack you could throw some code in a scriptlet tag near the top of the page.

Its not pretty but it is probably the quickest way since time is not your friend

<&#37;
  LoginSessionBean lsb = new LoginSessionBean();
    lsb.setUsername();
    lsb.serPassword();
    lsb.verifyLoginButton();

    AmendCar=new AmendCar(lsb.getDealerID());
%>

Atomic Pineapple

thanks, I ended up using FacesContext to get the beans to pass data, I'll post the code up later