SqliteResultWrapper.php
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SqliteResultWrapper.php
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	<?php

	namespace Wikimedia\Rdbms;

	use ArrayIterator;
	use PDO;
	use PDOStatement;

	class SqliteResultWrapper extends ResultWrapper {
	/** @var PDOStatement\|null */
	private $result;
	/** @var ArrayIterator\|null */
	private $rows;

	/**
	* @internal
	* @param PDOStatement $result
	*/
	public function __construct( PDOStatement $result ) {
	$this->result = $result;
	// SQLite doesn't allow buffered results or data seeking etc, so we'll
	// use fetchAll. PDO has PDO::CURSOR_SCROLL but the SQLite C API doesn't
	// support it, so the driver raises an error if it is used.
	$this->rows = $result->fetchAll( PDO::FETCH_OBJ );
	}

	protected function doNumRows() {
	return count( $this->rows );
	}

	protected function doFetchObject() {
	return $this->rows[$this->currentPos] ?? false;
	}

	protected function doFetchRow() {
	$obj = $this->doFetchObject();
	if ( is_object( $obj ) ) {
	$i = 0;
	$row = get_object_vars( $obj );
	foreach ( $row as $value ) {
	$row[$i++] = $value;
	}
	return $row;
	} else {
	return $obj;
	}
	}

	protected function doSeek( $pos ) {
	// Nothing to do -- parent updates $this->currentPos
	}

	protected function doFree() {
	$this->rows = null;
	$this->result = null;
	}

	protected function doGetFieldNames() {
	if ( $this->rows ) {
	return array_keys( get_object_vars( $this->rows[0] ) );
	} else {
	return [];
	}
	}
	}