torque/src/java/org/apache/fulcrum/security/torque/basic/TorqueBasicModelManagerImpl.java [63:110]:
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            Connection con = null;

            try
            {
            	con = Transaction.begin();

                ((TorqueAbstractSecurityEntity)user).update(con);
                ((TorqueAbstractSecurityEntity)group).update(con);

                Transaction.commit(con);
                con = null;
            }
            catch (TorqueException e)
            {
                throw new DataBackendException("grant('" + user.getName() + user.getId() + "', '" + group.getName() + group.getId() + "') failed", e);
            }
            finally
            {
                if (con != null)
                {
                    Transaction.safeRollback(con);
                }
            }

            return;
        }

        if (!groupExists)
        {
            throw new UnknownEntityException("Unknown group '" + group.getName() + "'");
        }

        if (!userExists)
        {
            throw new UnknownEntityException("Unknown user '" + user.getName() + "'");
        }
    }

    /**
     * Removes a user in a group.
     *
     * This method is used when removing a user to a group
     *
     * @param user the User.
     * @throws DataBackendException if there was an error accessing the data backend.
     * @throws UnknownEntityException if the user or group is not present.
     */
    @Override
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torque/src/java/org/apache/fulcrum/security/torque/basic/TorqueBasicModelManagerImpl.java [121:168]:
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            Connection con = null;

            try
            {
            	con = Transaction.begin();

                ((TorqueAbstractSecurityEntity)user).update(con);
                ((TorqueAbstractSecurityEntity)group).update(con);

                Transaction.commit(con);
                con = null;
            }
            catch (TorqueException e)
            {
                throw new DataBackendException("grant('" + user.getName() + user.getId() + "', '" + group.getName() + group.getId() + "') failed", e);
            }
            finally
            {
                if (con != null)
                {
                    Transaction.safeRollback(con);
                }
            }

            return;
        }

        if (!groupExists)
        {
            throw new UnknownEntityException("Unknown group '" + group.getName() + "'");
        }

        if (!userExists)
        {
            throw new UnknownEntityException("Unknown user '" + user.getName() + "'");
        }
    }

    /**
     * Revokes all groups from a user
     *
     * This method is used when deleting an account.
     *
     * @param user the User.
     * @throws DataBackendException if there was an error accessing the data backend.
     * @throws UnknownEntityException if the account is not present.
     */
    @Override
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