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<?php
/**
* This file is part of the Statistical Classifier package.
*
* (c) Cam Spiers <camspiers@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Camspiers\StatisticalClassifier\DataSource;
use PDO;
/**
* @author Cam Spiers <camspiers@gmail.com>
* @package Statistical Classifier
*/
class PDOQuery extends DataArray
{
/**
* The pdo connection object
* @var PDO
*/
private $pdo;
/**
* The category of the query
* @var string
*/
private $category;
/**
* The query to run
* @var string
*/
private $query;
/**
* The column to use for the document
* @var string
*/
private $documentColumn;
/**
* Creates the data source with the query details
* @param string $category Category of the query
* @param PDO $pdo The PDO connection object
* @param string $query The query to run
* @param string $documentColumn The column of the document
*/
public function __construct(
$category,
PDO $pdo,
$query,
$documentColumn
) {
$this->category = $category;
$this->pdo = $pdo;
$this->query = $query;
$this->documentColumn = $documentColumn;
}
/**
* @{inheritdoc}
*/
public function read()
{
$query = $this->pdo->query($this->query);
$query->setFetchMode(PDO::FETCH_ASSOC);
$documents = array();
while ($row = $query->fetch()) {
$documents[] = array(
'category' => $this->category,
'document' => $row[$this->documentColumn]
);
}
return $documents;
}
}