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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2015 (original work) Open Assessment Technologies SA; |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | namespace oat\tao\model\lock\implementation; |
| 24 | |
| 25 | use oat\tao\model\lock\LockSystem; |
| 26 | use core_kernel_classes_Resource; |
| 27 | use common_exception_InconsistentData; |
| 28 | use oat\oatbox\service\ConfigurableService; |
| 29 | |
| 30 | /** |
| 31 | * Implements a non locking Lock |
| 32 | * |
| 33 | * @note It would be preferably static, but we may want to have the polymorphism on lock, but it would be prevented by |
| 34 | * explicit class method static calls. Also if you nevertheless call it statically you may want to avoid the late |
| 35 | * static binding for the getLockProperty |
| 36 | */ |
| 37 | class NoLock extends ConfigurableService implements LockSystem |
| 38 | { |
| 39 | /** |
| 40 | * Do nothing |
| 41 | * @param core_kernel_classes_Resource $resource |
| 42 | * @param core_kernel_classes_Resource $owner |
| 43 | */ |
| 44 | public function setLock(core_kernel_classes_Resource $resource, $ownerId) |
| 45 | { |
| 46 | // do nothing |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * always returns false |
| 51 | * @return boolean |
| 52 | */ |
| 53 | public function isLocked(core_kernel_classes_Resource $resource) |
| 54 | { |
| 55 | return false; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * does nothing |
| 60 | * |
| 61 | * @param core_kernel_classes_Resource $resource |
| 62 | * @param core_kernel_classes_Resource $user |
| 63 | */ |
| 64 | public function releaseLock(core_kernel_classes_Resource $resource, $ownerId) |
| 65 | { |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * does nothing |
| 70 | * |
| 71 | * @param core_kernel_classes_Resource $resource |
| 72 | */ |
| 73 | public function forceReleaseLock(core_kernel_classes_Resource $resource) |
| 74 | { |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Throws an exception as no lock can exist |
| 79 | * |
| 80 | * @throws common_exception_InconsistentData |
| 81 | */ |
| 82 | public function getLockData(core_kernel_classes_Resource $resource) |
| 83 | { |
| 84 | return null; |
| 85 | } |
| 86 | } |