69 lines
2.0 KiB
PHP
69 lines
2.0 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
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*
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* @author Julius Härtl <jus@bitgrid.net>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\Deck\Db;
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use Generator;
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use OCP\AppFramework\Db\Entity;
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use OCP\AppFramework\Db\QBMapper;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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/**
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* @template T of Entity
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* @template-extends QBMapper<T>
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*/
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abstract class DeckMapper extends QBMapper {
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/**
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* @param $id
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* @return T
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* @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
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* @throws \OCP\AppFramework\Db\DoesNotExistException
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*/
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public function find($id) {
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$qb = $this->db->getQueryBuilder();
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$qb->select('*')
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->from($this->getTableName())
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->where($qb->expr()->eq('id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
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return $this->findEntity($qb);
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}
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/**
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* Helper function to split passed array into chunks of 1000 elements and
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* call a given callback for fetching query results
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*
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* Can be useful to limit to 1000 results per query for oracle compatiblity
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* but still iterate over all results
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*/
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public function chunkQuery(array $ids, callable $callback): Generator {
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$limit = 1000;
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while (!empty($ids)) {
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$slice = array_splice($ids, 0, $limit);
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foreach ($callback($slice) as $item) {
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yield $item;
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}
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}
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}
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}
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