InMemoryLogin.java (path: ../login/impl)

/**
  * Implements the Login interface. Defines a list-based set of accounts.
  */

package login.impl;
import login.*;
import java.util.*;

public class InMemoryLogin implements Login
    {

    public ArrayList<Account> account;

    /**
      * Adds a given person's login credentials to the list.
      * @param login The username associated to the account.
      * @param password The password associated to the account.
      * @param email The email associated to the account.
      */

    public void add(String login, String password, String email)
        {
        if(account == null)
            account = new ArrayList<Account>();
        Account a = new Account(login, password, email);
        account.add(a);
        }

    /**
      * Checks the presence of a given account in the list. Returns it if present.
      * @param login The username associated to the account.
      * @param password The password associated to the account.
      * @return The account associated to the given access credentials, if present.
      */

    public Account login(String login, String password)
        {
        if(account == null)
            return null;
        for(int i = 0; i < account.size(); i++)
            {
            if(account.get(i).getLogin().equals(login) && account.get(i).getPassword().equals(password))
                return account.get(i);
            }
        return null;
        }

    }