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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Empty Search Object |
| 5 | * |
| 6 | * PHP version 8 |
| 7 | * |
| 8 | * Copyright (C) Villanova University 2010. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2, |
| 12 | * as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | * @category VuFind |
| 24 | * @package Search_EmptySet |
| 25 | * @author Demian Katz <demian.katz@villanova.edu> |
| 26 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 27 | * @link https://vufind.org Main Page |
| 28 | */ |
| 29 | |
| 30 | namespace VuFind\Search\EmptySet; |
| 31 | |
| 32 | use VuFind\Search\Base\Results as BaseResults; |
| 33 | |
| 34 | /** |
| 35 | * Simple search results object to represent an empty set (used when dealing with |
| 36 | * exceptions that prevent a "real" search object from being constructed). |
| 37 | * |
| 38 | * @category VuFind |
| 39 | * @package Search_EmptySet |
| 40 | * @author Demian Katz <demian.katz@villanova.edu> |
| 41 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 42 | * @link https://vufind.org Main Page |
| 43 | */ |
| 44 | class Results extends BaseResults |
| 45 | { |
| 46 | /** |
| 47 | * Support method for constructor -- perform a search based on the parameters |
| 48 | * passed to the object. |
| 49 | * |
| 50 | * @return void |
| 51 | */ |
| 52 | protected function performSearch() |
| 53 | { |
| 54 | // Do nothing |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Returns the stored list of facets for the last search |
| 59 | * |
| 60 | * @param array $filter Array of field => on-screen description listing all |
| 61 | * of the desired facet fields; set to null to get all configured values. |
| 62 | * |
| 63 | * @return array Facets data arrays |
| 64 | */ |
| 65 | public function getFacetList($filter = null) |
| 66 | { |
| 67 | return []; |
| 68 | } |
| 69 | } |