SessionHandlerBean.java
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package fi.insomnia.bortal.beans;
import fi.insomnia.bortal.enums.Permission;
import fi.insomnia.bortal.enums.RolePermission;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import java.util.Vector;
import javax.annotation.Resource;
import javax.annotation.security.DeclareRoles;
import javax.ejb.EJB;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.insomnia.bortal.facade.RoleFacade;
import fi.insomnia.bortal.facade.UserFacade;
import fi.insomnia.bortal.model.AccessRight;
import fi.insomnia.bortal.model.Event;
import fi.insomnia.bortal.model.Role;
import fi.insomnia.bortal.model.RoleRight;
import fi.insomnia.bortal.model.User;
/**
* Session Bean implementation class SessionHandlerBean
*/
@Stateless
@DeclareRoles("admin")
public class SessionHandlerBean implements SessionHandlerBeanLocal, SessionHandlerBeanRemote {
private static final Logger logger = LoggerFactory.getLogger(SessionHandlerBean.class);
@EJB
private UserFacade userfacade;
@EJB
private AccessRightBeanLocal accessRightBeanLocal;
@EJB
private RoleFacade roleFacade;
@Resource
private SessionContext context;
@EJB
private UserBean userbean;
/**
* Default constructor.
*/
public SessionHandlerBean() {
// TODO Auto-generated constructor stub
}
public boolean hasPermission(Permission target, User user, RolePermission permission) {
if (user == null) {
return false;
}
AccessRight expectedRight = accessRightBeanLocal.findOrCreate(target);
User dbusr = userfacade.find(user.getId());
if (dbusr != null) {
Set<Role> checkedRoles = new HashSet<Role>();
for (Role r : dbusr.getRoles()) {
if (getRights(r, expectedRight, permission, checkedRoles)) {
return true;
}
}
}
return false;
}
private static boolean getRights(Role role, AccessRight expectedRight, RolePermission permission, Set<Role> checkedRoles) {
if (checkedRoles.contains(role)) {
return false;
}
for (RoleRight rr : role.getRoleRights()) {
if (rr.getAccessRight().equals(expectedRight)) {
switch (permission) {
case READ:
if (rr.getRead()) {
return true;
}
break;
case WRITE:
if (rr.getWrite()) {
return true;
}
break;
case EXECUTE:
if (rr.isExecute()) {
return true;
}
}
}
}
checkedRoles.add(role);
for (Role r : role.getParents()) {
if (getRights(r, expectedRight, permission, checkedRoles)) {
return true;
}
}
return false;
}
public User tryLogin(String username, String password) {
User user = userfacade.findByLogin(username.trim());
if (user != null && user.checkPassword(password)) {
return user;
}
return null;
}
/**
* Makes sure default user and public role exist and the user is member of
* the role.
*/
public User getDefaultUser(Event event) {
Role publicRole = roleFacade.getOrCreatePublicRole(event);
User defaultUser = userfacade.getOrCreateDefaultUser();
if (!defaultUser.getRoles().contains(publicRole)) {
ArrayList<Role> userRoles = new ArrayList<Role>();
userRoles.add(publicRole);
defaultUser.setRoles(userRoles);
}
return defaultUser;
}
@Override
public boolean authenticate(String username, String password) {
return (tryLogin(username, password) != null);
}
@Override
public Enumeration<String> getGroupNames(String user) {
Vector<String> foo = new Vector<String>();
foo.add("admin");
return foo.elements();
}
@Override
public User getCurrentUser(Event event) {
Principal principal = context.getCallerPrincipal();
User ret = userbean.getUser(principal.getName());
if (ret == null) {
ret = getDefaultUser(event);
}
return ret;
}
}