this.uidNumber = value;
    }

    public String getX121Address() {
        checkSpecifiedProperty("x121Address");
        return convertEmptyToNull(x121Address);
    }

    public void setX121Address(String value) {
        registerModifiedProperty("x121Address");
        this.x121Address = value;
    }

        setupEpg(_epgMap, et -> ((User) et).getUidNumber(), (et, vl) -> ((User) et).setUidNumber(DfTypeUtil.toLong(vl)), "uidNumber");
        setupEpg(_epgMap, et -> ((User) et).getX121Address(), (et, vl) -> ((User) et).setX121Address(DfTypeUtil.toString(vl)),
                "x121Address");
    }

    @Override
    public PropertyGateway findPropertyGateway(final String prop) {
        return doFindEpg(_epgMap, prop);
    }

            result.setTitle(DfTypeUtil.toString(source.get("title")));
            result.setUidNumber(DfTypeUtil.toLong(source.get("uidNumber")));
            result.setX121Address(DfTypeUtil.toString(source.get("x121Address")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {

    }

    @Test
    public void test_user_x121Address() {
        final User user = new User();
        assertNull(user.getX121Address());

        user.setX121Address("X121001");
        assertEquals("X121001", user.getX121Address());
    }

                        o -> user.setTeletexTerminalIdentifier(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrX121Address(), o -> user.setX121Address(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrBusinessCategory(), o -> user.setBusinessCategory(o.toString()));