userregistry.java

一个虚拟训练系统.主要使用j2ee框架实现.

package com.jsfcompref.trainer;

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


/**
 * UserRegistry.java serves as the POJO that manages a List of registered users
 * for the Virtual Trainer application.
 * 
 * This Java demo version is not persisted and creates a set of demo users
 * upon instantiation.
 * 
 * Like TrainingEventRegistry.java it is also registered as an application scoped
 * managed bean.
 */


public class UserRegistry 
{

  private List RegisteredUsers = new ArrayList();

  public UserRegistry()
  {
  //populate UserRegistry with initial vals
  RegisteredUsers.add( new UserBean(1, "Guest", "Guest", "male", new java.util.Date(), "[e-mail]", "Basic", "guest", "guest",  false));  
  RegisteredUsers.add( new UserBean(2, "Scott", "Tiger", "male", new java.util.Date(), "[e-mail]", "Medium", "stiger", "welcome",  false));  
  RegisteredUsers.add( new UserBean(3, "Claire", "Dassault", "female", new java.util.Date(), "[e-mail]", "Medium", "claire", "claire",  false));  
  RegisteredUsers.add( new UserBean(4, "Joe", "Fitness", "male", new java.util.Date(), "[e-mail]", "Premium", "jfitness", "jfitness",  true));
  RegisteredUsers.add( new UserBean(5, "Jake", "DeJoque", "male", new java.util.Date(), "[e-mail]", "Premium", "jake", "jake",  true));
  RegisteredUsers.add( new UserBean(6, "Sally", "Sweats", "female", new java.util.Date(), "[e-mail]", "Premium", "sally", "sally",  true));
  }
  
  public String AddRegisteredUser(UserBean newUser)
  {
  // Calculate new account id based on size of user registry
  // For demo only - Persistent technology will use a sequence
  int usercnt = RegisteredUsers.size();
  newUser.setAccountNo(usercnt + 1);
  
  // First check to see if userid already exists
  if (!userIdAlreadyExists(newUser.getUserid())){
  
    RegisteredUsers.add((UserBean) newUser);    
    return newUser.getUserid();
  }
  
  // Return userid of registered user
  return null;
  }
  
  
  public UserBean findUserByCredentials(String userid, String password)
  {
    boolean found = false;
    UserBean currentUser;
    
    // temporarily turn ArrayList into static array of UserBeans 
    // then just return the first UserBean.
    UserBean userArray[] = new UserBean[RegisteredUsers.size()];   
    userArray = (UserBean[])RegisteredUsers.toArray(userArray);
    
    int i=0;
    
    while (!found && i < RegisteredUsers.size())
    {
      currentUser = userArray[i];
        
      if (currentUser.getUserid().equals(userid) && currentUser.getPassword().equals(password) )
       {
        // Found user!
        found = true;
        return userArray[i];
       }
      i++;
    }
    
  return null;
  }


  
  public boolean userIdAlreadyExists(String userid)
  {
    boolean found = false;
    UserBean currentUser;
    
    // Temporarily turn ArrayList into static array of UserBeans 
    // then just return the first UserBean.
    UserBean userArray[] = new UserBean[RegisteredUsers.size()];   
    userArray = (UserBean[])RegisteredUsers.toArray(userArray);
    
    int i=0;
    
    while (!found && i < RegisteredUsers.size())
    {
      currentUser = userArray[i];
        
      if (currentUser.getUserid().equals(userid) )
       {
        // Found user!
        found = true;
        return found;
       }
      i++;
    }
    
  return found;
  }


  

  public List findTrainerUsers()
  {  // Returns only list of Users with trainer status
   ArrayList trainerlist = new ArrayList();
   
   for  (int i = 0; i < this.RegisteredUsers.size(); i++) {
     UserBean user = (UserBean) RegisteredUsers.get(i);
     if (user.isTrainer()){
       trainerlist.add(user);  
     }
   }   
   return trainerlist;
  }


  
}