usersessionfacadebean.java~3~

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package loginejb;

import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.ejb.CreateException;
import javax.ejb.*;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Collection;

public class UserSessionFacadeBean
    implements SessionBean {
  SessionContext sessionContext;
  private UserHome userHome;
  public void ejbCreate() throws CreateException {
  }

  public void ejbRemove() {
  }

  public void ejbActivate() {
  }

  public void ejbPassivate() {
  }

  public void setSessionContext(SessionContext sessionContext) {
    this.sessionContext = sessionContext;
    try {
      findUserHome();
    }
    catch (Exception e) {
      throw new EJBException(e.getMessage());
    }
  }

  public void createUser(UserDTO userDTO) throws EJBException {
    if (userDTO == null) {
      return;
    }
    try {
      User user = userHome.create(userDTO.getUsername());
      setUserFromUserDTO(user, userDTO);
    }
    catch (Exception e) {
      throw new EJBException(e.getMessage());
    }
  }

  public void removeUser(String username) throws EJBException {
    try {
      userHome.remove(username);
    }
    catch (Exception e) {
      throw new EJBException(e.getMessage());
    }
  }

  public void removeUser(UserDTO userDTO) throws EJBException {
    if (userDTO != null) {
      String username = userDTO.getUsername();
      removeUser(username);
    }
  }

  public void updateUser(UserDTO userDTO) throws EJBException {
    if (userDTO != null) {
      String username = userDTO.getUsername();
      try {
        User user = userHome.findByPrimaryKey(username);
        setUserFromUserDTO(user, userDTO);
      }
      catch (Exception e) {
        throw new EJBException(e.getMessage());
      }
    }
  }

  public void updateUsers(UserDTO[] userDtos) throws EJBException {
    if (userDtos != null) {
      for (int i = 0; i < userDtos.length; i++) {
        updateUser(userDtos[i]);
      }
    }
  }

  public UserDTO userFindByPrimaryKey(String username) throws EJBException {
    try {
      return assembleUserDto(userHome.findByPrimaryKey(username));
    }
    catch (Exception e) {
      throw new EJBException(e.getMessage());
    }
  }

  private void setUserFromUserDTO(User user, UserDTO userDTO) {
    user.setPassword(userDTO.getPassword());
  }

  private void findUserHome() throws EJBException {
    final String ENTITY_NAME = "java:comp/env/ejb/user";
    if (userHome == null) {
      try {
        ServiceLocator locator = ServiceLocator.getInstance();
        userHome = (UserHome) locator.getEjbLocalHome(ENTITY_NAME);
      }
      catch (ServiceLocatorException e) {
        throw new EJBException(e.getMessage());
      }
    }
  }

  private UserDTO assembleUserDto(User user) {
    return UserDtoAssembler.createDto(user);
  }

  private UserDTO[] assembleUserDtos(Collection users) {
    List list = new ArrayList();
    if (users != null) {
      Iterator iterator = users.iterator();
      while (iterator.hasNext()) {
        User user = (User) iterator.next();
        list.add(assembleUserDto(user));
      }
    }
    UserDTO[] returnArray = new UserDTO[list.size()];
    return (UserDTO[]) list.toArray(returnArray);
  }
}