com.headstrong.teevra.services.useradmin.dao.impl.UserDAOImpl.java Source code

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Here is the source code for com.headstrong.teevra.services.useradmin.dao.impl.UserDAOImpl.java

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/*
 * The information in this document is subject to change without notice and 
 * does not represent a commitment by Headstrong Corporation. The software 
 * and/or databases described in this document are furnished under a license 
 * agreement and may be used or copied only in accordance with the terms of 
 * the agreement. 
 * 
 * Copyright  2008 Headstrong Corporation
 * All rights reserved.
 * 
 * $Id: UserDAOImpl.java
 * $Revision: 
 * $Author: viswanathp
 * $DateTime: Apr 20, 2009 
 */

package com.headstrong.teevra.services.useradmin.dao.impl;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Restrictions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.headstrong.teevra.common.dao.hibernate.BaseHibernateDAO;
import com.headstrong.teevra.common.exception.EncryptionException;
import com.headstrong.teevra.common.utils.MessageEncryptor;
import com.headstrong.teevra.services.useradmin.dao.UserDAO;
import com.headstrong.teevra.services.useradmin.eo.UserEO;
import com.headstrong.teevra.services.useradmin.exception.UniqueUserException;
import com.headstrong.teevra.services.useradmin.exception.UserAdminServiceException;

/**
 * Implements CRUD operations on users
 */
public class UserDAOImpl extends BaseHibernateDAO<UserEO> implements UserDAO {
    /**
     * Logger for UserDAOImpl
     */
    private static Logger logger = LoggerFactory.getLogger(UserDAOImpl.class);

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.useradmin.dao.UserDAO#getUsers()
     */
    public List<UserEO> getUsers() throws UserAdminServiceException {

        String query = "from UserEO user";
        return super.getByQuery(query);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.useradmin.dao.UserDAO#registerUser(com.headstrong.teevra.services.useradmin.eo.UserEO)
     */
    public void saveUser(UserEO userToSave) throws UserAdminServiceException {

        DetachedCriteria criteria = DetachedCriteria.forClass(UserEO.class);
        criteria.add(Restrictions.eq("userName", userToSave.getUserName()));
        if (userToSave.getUserId() != null) {
            criteria.add(Restrictions.ne("userId", userToSave.getUserId()));
        }
        List<UserEO> userList = super.getByCriteria(criteria);

        if (!userList.isEmpty()) {
            logger.error("Couldn't register user: " + userToSave.getUserName()
                    + "A user with the same name already exists in the system");
            throw new UniqueUserException("A user with the name " + "'" + userToSave.getUserName() + "'"
                    + " already exists in the system");
        } else {
            super.saveOrUpdate(userToSave);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.useradmin.dao.UserDAO#unregisterUser(java.lang.Long)
     */
    public void deleteUser(Long userId) throws UserAdminServiceException {

        // delete from User_Role table
        bulkUpdate("delete from UserRoleEO where userId = ?", new Object[] { userId });
        logger.info("User-Role mappings with user id " + userId + " have been unregistered successfully");

        // delete from User table
        bulkUpdate("delete from UserEO where userId = ?", new Object[] { userId });
        logger.info("User with user id " + userId + " has been unregistered successfully");

    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.useradmin.dao.UserDAO#getUser(java.lang.String,
     *      java.lang.String)
     */
    public UserEO getUser(String userName, String password) throws UserAdminServiceException {

        UserEO user = getUser(userName);
        // decrypt the password
        MessageEncryptor encryptor = new MessageEncryptor();
        String decryptedPassword = null;
        try {
            String encryptedPassword = user.getPassword();
            if (encryptedPassword != null && encryptedPassword.trim().length() > 0)
                decryptedPassword = encryptor.decrypt(encryptedPassword);
            else
                decryptedPassword = encryptedPassword;
        } catch (EncryptionException e) {
            logger.error("Error while decrypting the password", e);
            throw new UserAdminServiceException("Error while decrypting the password");
        }

        if (decryptedPassword != null) {
            if (decryptedPassword.equals(password)) {
                return user;
            }
        }
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.headstrong.teevra.services.useradmin.dao.UserDAO#getUser(java.lang.String)
     */
    public UserEO getUser(String userName) throws UserAdminServiceException {
        DetachedCriteria criteria = DetachedCriteria.forClass(UserEO.class);
        criteria.add(Restrictions.eq("userName", userName));
        //criteria.add(Restrictions.eq("userStatus", UserEO.STATUS_ACTIVE));
        List<UserEO> userList = super.getByCriteria(criteria);
        if (!userList.isEmpty()) {
            return userList.get(0);
        }
        return null;
    }
}