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Darko
72 lines
2.2 KiB
PHP
72 lines
2.2 KiB
PHP
<?php
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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 General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see LICENSE.txt in the base directory. If
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* not, see:
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*
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* @link <http://www.gnu.org/licenses/>.
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* @author niel
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*/
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namespace newznab\data\model\source\database\adapter\pdo;
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use \PDO;
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use \PDOStatement;
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use \PDOException;
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/**
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* This class is a wrapper around the MySQL result returned and can be used to iterate over it.
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*
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* It also provides a simple caching mechanism which stores the result after the first load.
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* You are then free to iterate over the result back and forth through the provided methods
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* and don't have to think about hitting the database too often.
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*
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* On initialization, it needs a `PDOStatement` to operate on. You are then free to use all
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* methods provided by the `Iterator` interface.
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*
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* @link http://php.net/manual/de/class.pdostatement.php The PDOStatement class.
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* @link http://php.net/manual/de/class.iterator.php The Iterator interface.
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*/
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class Result extends \newznab\data\source\Result
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{
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public $named = false;
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/**
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* Fetches the result from the resource and caches it.
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*
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* @return boolean Return `true` on success or `false` if it is not valid.
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*/
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protected function _fetchFromResource()
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{
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if ($this->_resource instanceof PDOStatement) {
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try {
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$mode = $this->named ? PDO::FETCH_NAMED : PDO::FETCH_NUM;
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if ($result = $this->_resource->fetch($mode)) {
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$this->_key = $this->_iterator;
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$this->_current = $this->_cache[$this->_iterator++] = $result;
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return true;
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}
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} catch (PDOException $e) {
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}
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}
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$this->_resource = null;
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return false;
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}
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public function __destruct()
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{
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$this->close();
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}
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}
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?>
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