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silverstripe-docsviewer/thirdparty/Zend/Search/Lucene/Storage/Directory/Filesystem.php

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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Storage
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Filesystem.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/**
* Zend_Search_Lucene_Storage_Directory
*/
require_once 'Zend/Search/Lucene/Storage/Directory.php';
/**
* FileSystem implementation of Directory abstraction.
*
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Storage
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Search_Lucene_Storage_Directory_Filesystem extends Zend_Search_Lucene_Storage_Directory
{
/**
* Filesystem path to the directory
*
* @var string
*/
protected $_dirPath = null;
/**
* Cache for Zend_Search_Lucene_Storage_File_Filesystem objects
* Array: filename => Zend_Search_Lucene_Storage_File object
*
* @var array
* @throws Zend_Search_Lucene_Exception
*/
protected $_fileHandlers;
/**
* Default file permissions
*
* @var integer
*/
protected static $_defaultFilePermissions = 0666;
/**
* Get default file permissions
*
* @return integer
*/
public static function getDefaultFilePermissions()
{
return self::$_defaultFilePermissions;
}
/**
* Set default file permissions
*
* @param integer $mode
*/
public static function setDefaultFilePermissions($mode)
{
self::$_defaultFilePermissions = $mode;
}
/**
* Utility function to recursive directory creation
*
* @param string $dir
* @param integer $mode
* @param boolean $recursive
* @return boolean
*/
public static function mkdirs($dir, $mode = 0777, $recursive = true)
{
if (($dir === null) || $dir === '') {
return false;
}
if (is_dir($dir) || $dir === '/') {
return true;
}
if (self::mkdirs(dirname($dir), $mode, $recursive)) {
return mkdir($dir, $mode);
}
return false;
}
/**
* Object constructor
* Checks if $path is a directory or tries to create it.
*
* @param string $path
* @throws Zend_Search_Lucene_Exception
*/
public function __construct($path)
{
if (!is_dir($path)) {
if (file_exists($path)) {
include_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Path exists, but it\'s not a directory');
} else {
if (!self::mkdirs($path)) {
include_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception("Can't create directory '$path'.");
}
}
}
$this->_dirPath = $path;
$this->_fileHandlers = array();
}
/**
* Closes the store.
*
* @return void
*/
public function close()
{
foreach ($this->_fileHandlers as $fileObject) {
$fileObject->close();
}
$this->_fileHandlers = array();
}
/**
* Returns an array of strings, one for each file in the directory.
*
* @return array
*/
public function fileList()
{
$result = array();
$dirContent = opendir($this->_dirPath);
while (($file = readdir($dirContent)) !== false) {
if (($file == '..')||($file == '.')) { continue;
}
if(!is_dir($this->_dirPath . '/' . $file) ) {
$result[] = $file;
}
}
closedir($dirContent);
return $result;
}
/**
* Creates a new, empty file in the directory with the given $filename.
*
* @param string $filename
* @return Zend_Search_Lucene_Storage_File
* @throws Zend_Search_Lucene_Exception
*/
public function createFile($filename)
{
if (isset($this->_fileHandlers[$filename])) {
$this->_fileHandlers[$filename]->close();
}
unset($this->_fileHandlers[$filename]);
include_once 'Zend/Search/Lucene/Storage/File/Filesystem.php';
$this->_fileHandlers[$filename] = new Zend_Search_Lucene_Storage_File_Filesystem($this->_dirPath . '/' . $filename, 'w+b');
// Set file permissions, but don't care about any possible failures, since file may be already
// created by anther user which has to care about right permissions
@chmod($this->_dirPath . '/' . $filename, self::$_defaultFilePermissions);
return $this->_fileHandlers[$filename];
}
/**
* Removes an existing $filename in the directory.
*
* @param string $filename
* @return void
* @throws Zend_Search_Lucene_Exception
*/
public function deleteFile($filename)
{
if (isset($this->_fileHandlers[$filename])) {
$this->_fileHandlers[$filename]->close();
}
unset($this->_fileHandlers[$filename]);
global $php_errormsg;
$trackErrors = ini_get('track_errors'); ini_set('track_errors', '1');
if (!@unlink($this->_dirPath . '/' . $filename)) {
ini_set('track_errors', $trackErrors);
include_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Can\'t delete file: ' . $php_errormsg);
}
ini_set('track_errors', $trackErrors);
}
/**
* Purge file if it's cached by directory object
*
* Method is used to prevent 'too many open files' error
*
* @param string $filename
* @return void
*/
public function purgeFile($filename)
{
if (isset($this->_fileHandlers[$filename])) {
$this->_fileHandlers[$filename]->close();
}
unset($this->_fileHandlers[$filename]);
}
/**
* Returns true if a file with the given $filename exists.
*
* @param string $filename
* @return boolean
*/
public function fileExists($filename)
{
return isset($this->_fileHandlers[$filename]) ||
file_exists($this->_dirPath . '/' . $filename);
}
/**
* Returns the length of a $filename in the directory.
*
* @param string $filename
* @return integer
*/
public function fileLength($filename)
{
if (isset($this->_fileHandlers[$filename])) {
return $this->_fileHandlers[$filename]->size();
}
return filesize($this->_dirPath .'/'. $filename);
}
/**
* Returns the UNIX timestamp $filename was last modified.
*
* @param string $filename
* @return integer
*/
public function fileModified($filename)
{
return filemtime($this->_dirPath .'/'. $filename);
}
/**
* Renames an existing file in the directory.
*
* @param string $from
* @param string $to
* @return void
* @throws Zend_Search_Lucene_Exception
*/
public function renameFile($from, $to)
{
global $php_errormsg;
if (isset($this->_fileHandlers[$from])) {
$this->_fileHandlers[$from]->close();
}
unset($this->_fileHandlers[$from]);
if (isset($this->_fileHandlers[$to])) {
$this->_fileHandlers[$to]->close();
}
unset($this->_fileHandlers[$to]);
if (file_exists($this->_dirPath . '/' . $to)) {
if (!unlink($this->_dirPath . '/' . $to)) {
include_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Delete operation failed');
}
}
$trackErrors = ini_get('track_errors');
ini_set('track_errors', '1');
$success = @rename($this->_dirPath . '/' . $from, $this->_dirPath . '/' . $to);
if (!$success) {
ini_set('track_errors', $trackErrors);
include_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception($php_errormsg);
}
ini_set('track_errors', $trackErrors);
return $success;
}
/**
* Sets the modified time of $filename to now.
*
* @param string $filename
* @return void
*/
public function touchFile($filename)
{
return touch($this->_dirPath .'/'. $filename);
}
/**
* Returns a Zend_Search_Lucene_Storage_File object for a given $filename in the directory.
*
* If $shareHandler option is true, then file handler can be shared between File Object
* requests. It speed-ups performance, but makes problems with file position.
* Shared handler are good for short atomic requests.
* Non-shared handlers are useful for stream file reading (especial for compound files).
*
* @param string $filename
* @param boolean $shareHandler
* @return Zend_Search_Lucene_Storage_File
*/
public function getFileObject($filename, $shareHandler = true)
{
$fullFilename = $this->_dirPath . '/' . $filename;
include_once 'Zend/Search/Lucene/Storage/File/Filesystem.php';
if (!$shareHandler) {
return new Zend_Search_Lucene_Storage_File_Filesystem($fullFilename);
}
if (isset($this->_fileHandlers[$filename])) {
$this->_fileHandlers[$filename]->seek(0);
return $this->_fileHandlers[$filename];
}
$this->_fileHandlers[$filename] = new Zend_Search_Lucene_Storage_File_Filesystem($fullFilename);
return $this->_fileHandlers[$filename];
}
}
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