Файл: framework/thirdparty/Zend/Translate/Adapter.php
Строк: 1272
<?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_Translate
* @subpackage Zend_Translate_Adapter
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Adapter.php 24268 2011-07-25 14:47:42Z guilhermeblanco $
*/
/**
* @see Zend_Locale
*/
require_once 'Zend/Locale.php';
/**
* @see Zend_Translate_Plural
*/
require_once 'Zend/Translate/Plural.php';
/**
* Basic adapter class for each translation source adapter
*
* @category Zend
* @package Zend_Translate
* @subpackage Zend_Translate_Adapter
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Translate_Adapter {
/**
* Shows if locale detection is in automatic level
* @var boolean
*/
private $_automatic = true;
/**
* Internal value to see already routed languages
* @var array()
*/
private $_routed = array();
/**
* Internal cache for all adapters
* @var Zend_Cache_Core
*/
protected static $_cache = null;
/**
* Internal value to remember if cache supports tags
*
* @var boolean
*/
private static $_cacheTags = false;
/**
* Scans for the locale within the name of the directory
* @constant integer
*/
const LOCALE_DIRECTORY = 'directory';
/**
* Scans for the locale within the name of the file
* @constant integer
*/
const LOCALE_FILENAME = 'filename';
/**
* Array with all options, each adapter can have own additional options
* 'clear' => when true, clears already loaded translations when adding new files
* 'content' => content to translate or file or directory with content
* 'disableNotices' => when true, omits notices from being displayed
* 'ignore' => a prefix for files and directories which are not being added
* 'locale' => the actual set locale to use
* 'log' => a instance of Zend_Log where logs are written to
* 'logMessage' => message to be logged
* 'logPriority' => priority which is used to write the log message
* 'logUntranslated' => when true, untranslated messages are not logged
* 'reload' => reloads the cache by reading the content again
* 'scan' => searches for translation files using the LOCALE constants
* 'tag' => tag to use for the cache
*
* @var array
*/
protected $_options = array(
'clear' => false,
'content' => null,
'disableNotices' => false,
'ignore' => '.',
'locale' => 'auto',
'log' => null,
'logMessage' => "Untranslated message within '%locale%': %message%",
'logPriority' => 5,
'logUntranslated' => false,
'reload' => false,
'route' => null,
'scan' => null,
'tag' => 'Zend_Translate'
);
/**
* Translation table
* @var array
*/
protected $_translate = array();
/**
* Generates the adapter
*
* @param array|Zend_Config $options Translation options for this adapter
* @throws Zend_Translate_Exception
* @return void
*/
public function __construct($options = array())
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} else if (func_num_args() > 1) {
$args = func_get_args();
$options = array();
$options['content'] = array_shift($args);
if (!empty($args)) {
$options['locale'] = array_shift($args);
}
if (!empty($args)) {
$opt = array_shift($args);
$options = array_merge($opt, $options);
}
} else if (!is_array($options)) {
$options = array('content' => $options);
}
if (array_key_exists('cache', $options)) {
self::setCache($options['cache']);
unset($options['cache']);
}
if (isset(self::$_cache)) {
$id = 'Zend_Translate_' . $this->toString() . '_Options';
$result = self::$_cache->load($id);
if ($result) {
$this->_options = $result;
}
}
if (empty($options['locale']) || ($options['locale'] === "auto")) {
$this->_automatic = true;
} else {
$this->_automatic = false;
}
$locale = null;
if (!empty($options['locale'])) {
$locale = $options['locale'];
unset($options['locale']);
}
$this->setOptions($options);
$options['locale'] = $locale;
if (!empty($options['content'])) {
$this->addTranslation($options);
}
if ($this->getLocale() !== (string) $options['locale']) {
$this->setLocale($options['locale']);
}
}
/**
* Add translations
*
* This may be a new language or additional content for an existing language
* If the key 'clear' is true, then translations for the specified
* language will be replaced and added otherwise
*
* @param array|Zend_Config $options Options and translations to be added
* @throws Zend_Translate_Exception
* @return Zend_Translate_Adapter Provides fluent interface
*/
public function addTranslation($options = array())
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} else if (func_num_args() > 1) {
$args = func_get_args();
$options = array();
$options['content'] = array_shift($args);
if (!empty($args)) {
$options['locale'] = array_shift($args);
}
if (!empty($args)) {
$opt = array_shift($args);
$options = array_merge($opt, $options);
}
} else if (!is_array($options)) {
$options = array('content' => $options);
}
if (!isset($options['content']) || empty($options['content'])) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception("Required option 'content' is missing");
}
$originate = null;
if (!empty($options['locale'])) {
$originate = (string) $options['locale'];
}
if ((array_key_exists('log', $options)) && !($options['log'] instanceof Zend_Log)) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception('Instance of Zend_Log expected for option log');
}
try {
if (!($options['content'] instanceof Zend_Translate) && !($options['content'] instanceof Zend_Translate_Adapter)) {
if (empty($options['locale'])) {
$options['locale'] = null;
}
$options['locale'] = Zend_Locale::findLocale($options['locale']);
}
} catch (Zend_Locale_Exception $e) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception("The given Language '{$options['locale']}' does not exist", 0, $e);
}
$options = $options + $this->_options;
if (is_string($options['content']) and is_dir($options['content'])) {
$options['content'] = realpath($options['content']);
$prev = '';
$iterator = new RecursiveIteratorIterator(
new RecursiveRegexIterator(
new RecursiveDirectoryIterator($options['content'], RecursiveDirectoryIterator::KEY_AS_PATHNAME),
'/^(?!.*(.svn|.cvs)).*$/', RecursiveRegexIterator::MATCH
),
RecursiveIteratorIterator::SELF_FIRST
);
foreach ($iterator as $directory => $info) {
$file = $info->getFilename();
if (is_array($options['ignore'])) {
foreach ($options['ignore'] as $key => $ignore) {
if (strpos($key, 'regex') !== false) {
if (preg_match($ignore, $directory)) {
// ignore files matching the given regex from option 'ignore' and all files below
continue 2;
}
} else if (strpos($directory, DIRECTORY_SEPARATOR . $ignore) !== false) {
// ignore files matching first characters from option 'ignore' and all files below
continue 2;
}
}
} else {
if (strpos($directory, DIRECTORY_SEPARATOR . $options['ignore']) !== false) {
// ignore files matching first characters from option 'ignore' and all files below
continue;
}
}
if ($info->isDir()) {
// pathname as locale
if (($options['scan'] === self::LOCALE_DIRECTORY) and (Zend_Locale::isLocale($file, true, false))) {
$options['locale'] = $file;
$prev = (string) $options['locale'];
}
} else if ($info->isFile()) {
// filename as locale
if ($options['scan'] === self::LOCALE_FILENAME) {
$filename = explode('.', $file);
array_pop($filename);
$filename = implode('.', $filename);
if (Zend_Locale::isLocale((string) $filename, true, false)) {
$options['locale'] = (string) $filename;
} else {
$parts = explode('.', $file);
$parts2 = array();
foreach($parts as $token) {
$parts2 += explode('_', $token);
}
$parts = array_merge($parts, $parts2);
$parts2 = array();
foreach($parts as $token) {
$parts2 += explode('-', $token);
}
$parts = array_merge($parts, $parts2);
$parts = array_unique($parts);
$prev = '';
foreach($parts as $token) {
if (Zend_Locale::isLocale($token, true, false)) {
if (strlen($prev) <= strlen($token)) {
$options['locale'] = $token;
$prev = $token;
}
}
}
}
}
try {
$options['content'] = $info->getPathname();
$this->_addTranslationData($options);
} catch (Zend_Translate_Exception $e) {
// ignore failed sources while scanning
}
}
}
unset($iterator);
} else {
$this->_addTranslationData($options);
}
if ((isset($this->_translate[$originate]) === true) and (count($this->_translate[$originate]) > 0)) {
$this->setLocale($originate);
}
return $this;
}
/**
* Sets new adapter options
*
* @param array $options Adapter options
* @throws Zend_Translate_Exception
* @return Zend_Translate_Adapter Provides fluent interface
*/
public function setOptions(array $options = array())
{
$change = false;
$locale = null;
foreach ($options as $key => $option) {
if ($key == 'locale') {
$locale = $option;
} else if ((isset($this->_options[$key]) and ($this->_options[$key] != $option)) or
!isset($this->_options[$key])) {
if (($key == 'log') && !($option instanceof Zend_Log)) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception('Instance of Zend_Log expected for option log');
}
if ($key == 'cache') {
self::setCache($option);
continue;
}
$this->_options[$key] = $option;
$change = true;
}
}
if ($locale !== null) {
$this->setLocale($locale);
}
if (isset(self::$_cache) and ($change == true)) {
$id = 'Zend_Translate_' . $this->toString() . '_Options';
if (self::$_cacheTags) {
self::$_cache->save($this->_options, $id, array($this->_options['tag']));
} else {
self::$_cache->save($this->_options, $id);
}
}
return $this;
}
/**
* Returns the adapters name and it's options
*
* @param string|null $optionKey String returns this option
* null returns all options
* @return integer|string|array|null
*/
public function getOptions($optionKey = null)
{
if ($optionKey === null) {
return $this->_options;
}
if (isset($this->_options[$optionKey]) === true) {
return $this->_options[$optionKey];
}
return null;
}
/**
* Gets locale
*
* @return Zend_Locale|string|null
*/
public function getLocale()
{
return $this->_options['locale'];
}
/**
* Sets locale
*
* @param string|Zend_Locale $locale Locale to set
* @throws Zend_Translate_Exception
* @return Zend_Translate_Adapter Provides fluent interface
*/
public function setLocale($locale)
{
if (($locale === "auto") or ($locale === null)) {
$this->_automatic = true;
} else {
$this->_automatic = false;
}
try {
$locale = Zend_Locale::findLocale($locale);
} catch (Zend_Locale_Exception $e) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception("The given Language ({$locale}) does not exist", 0, $e);
}
if (!isset($this->_translate[$locale])) {
$temp = explode('_', $locale);
if (!isset($this->_translate[$temp[0]]) and !isset($this->_translate[$locale])) {
if (!$this->_options['disableNotices']) {
if ($this->_options['log']) {
$this->_options['log']->log("The language '{$locale}' has to be added before it can be used.", $this->_options['logPriority']);
} else {
trigger_error("The language '{$locale}' has to be added before it can be used.", E_USER_NOTICE);
}
}
}
$locale = $temp[0];
}
if (empty($this->_translate[$locale])) {
if (!$this->_options['disableNotices']) {
if ($this->_options['log']) {
$this->_options['log']->log("No translation for the language '{$locale}' available.", $this->_options['logPriority']);
} else {
trigger_error("No translation for the language '{$locale}' available.", E_USER_NOTICE);
}
}
}
if ($this->_options['locale'] != $locale) {
$this->_options['locale'] = $locale;
if (isset(self::$_cache)) {
$id = 'Zend_Translate_' . $this->toString() . '_Options';
if (self::$_cacheTags) {
self::$_cache->save($this->_options, $id, array($this->_options['tag']));
} else {
self::$_cache->save($this->_options, $id);
}
}
}
return $this;
}
/**
* Returns the available languages from this adapter
*
* @return array|null
*/
public function getList()
{
$list = array_keys($this->_translate);
$result = null;
foreach($list as $value) {
if (!empty($this->_translate[$value])) {
$result[$value] = $value;
}
}
return $result;
}
/**
* Returns the message id for a given translation
* If no locale is given, the actual language will be used
*
* @param string $message Message to get the key for
* @param string|Zend_Locale $locale (optional) Language to return the message ids from
* @return string|array|false
*/
public function getMessageId($message, $locale = null)
{
if (empty($locale) or !$this->isAvailable($locale)) {
$locale = $this->_options['locale'];
}
return array_search($message, $this->_translate[(string) $locale]);
}
/**
* Returns all available message ids from this adapter
* If no locale is given, the actual language will be used
*
* @param string|Zend_Locale $locale (optional) Language to return the message ids from
* @return array
*/
public function getMessageIds($locale = null)
{
if (empty($locale) or !$this->isAvailable($locale)) {
$locale = $this->_options['locale'];
}
return array_keys($this->_translate[(string) $locale]);
}
/**
* Returns all available translations from this adapter
* If no locale is given, the actual language will be used
* If 'all' is given the complete translation dictionary will be returned
*
* @param string|Zend_Locale $locale (optional) Language to return the messages from
* @return array
*/
public function getMessages($locale = null)
{
if ($locale === 'all') {
return $this->_translate;
}
if ((empty($locale) === true) or ($this->isAvailable($locale) === false)) {
$locale = $this->_options['locale'];
}
return $this->_translate[(string) $locale];
}
/**
* Is the wished language available ?
*
* @see Zend_Locale
* @param string|Zend_Locale $locale Language to search for, identical with locale identifier,
* @see Zend_Locale for more information
* @return boolean
*/
public function isAvailable($locale)
{
$return = isset($this->_translate[(string) $locale]);
return $return;
}
/**
* Load translation data
*
* @param mixed $data
* @param string|Zend_Locale $locale
* @param array $options (optional)
* @return array
*/
abstract protected function _loadTranslationData($data, $locale, array $options = array());
/**
* Internal function for adding translation data
*
* This may be a new language or additional data for an existing language
* If the options 'clear' is true, then the translation data for the specified
* language is replaced and added otherwise
*
* @see Zend_Locale
* @param array|Zend_Config $content Translation data to add
* @throws Zend_Translate_Exception
* @return Zend_Translate_Adapter Provides fluent interface
*/
private function _addTranslationData($options = array())
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} else if (func_num_args() > 1) {
$args = func_get_args();
$options['content'] = array_shift($args);
if (!empty($args)) {
$options['locale'] = array_shift($args);
}
if (!empty($args)) {
$options += array_shift($args);
}
}
if (($options['content'] instanceof Zend_Translate) || ($options['content'] instanceof Zend_Translate_Adapter)) {
$options['usetranslateadapter'] = true;
if (!empty($options['locale']) && ($options['locale'] !== 'auto')) {
$options['content'] = $options['content']->getMessages($options['locale']);
} else {
$content = $options['content'];
$locales = $content->getList();
foreach ($locales as $locale) {
$options['locale'] = $locale;
$options['content'] = $content->getMessages($locale);
$this->_addTranslationData($options);
}
return $this;
}
}
try {
$options['locale'] = Zend_Locale::findLocale($options['locale']);
} catch (Zend_Locale_Exception $e) {
require_once 'Zend/Translate/Exception.php';
throw new Zend_Translate_Exception("The given Language '{$options['locale']}' does not exist", 0, $e);
}
if ($options['clear'] || !isset($this->_translate[$options['locale']])) {
$this->_translate[$options['locale']] = array();
}
$read = true;
if (isset(self::$_cache)) {
$id = 'Zend_Translate_' . md5(serialize($options['content'])) . '_' . $this->toString();
$temp = self::$_cache->load($id);
if ($temp) {
$read = false;
}
}
if ($options['reload']) {
$read = true;
}
if ($read) {
if (!empty($options['usetranslateadapter'])) {
$temp = array($options['locale'] => $options['content']);
} else {
$temp = $this->_loadTranslationData($options['content'], $options['locale'], $options);
}
}
if (empty($temp)) {
$temp = array();
}
$keys = array_keys($temp);
foreach($keys as $key) {
if (!isset($this->_translate[$key])) {
$this->_translate[$key] = array();
}
if (array_key_exists($key, $temp) && is_array($temp[$key])) {
$this->_translate[$key] = $temp[$key] + $this->_translate[$key];
}
}
if ($this->_automatic === true) {
$find = new Zend_Locale($options['locale']);
$browser = $find->getEnvironment() + $find->getBrowser();
arsort($browser);
foreach($browser as $language => $quality) {
if (isset($this->_translate[$language])) {
$this->_options['locale'] = $language;
break;
}
}
}
if (($read) and (isset(self::$_cache))) {
$id = 'Zend_Translate_' . md5(serialize($options['content'])) . '_' . $this->toString();
if (self::$_cacheTags) {
self::$_cache->save($temp, $id, array($this->_options['tag']));
} else {
self::$_cache->save($temp, $id);
}
}
return $this;
}
/**
* Translates the given string
* returns the translation
*
* @see Zend_Locale
* @param string|array $messageId Translation string, or Array for plural translations
* @param string|Zend_Locale $locale (optional) Locale/Language to use, identical with
* locale identifier, @see Zend_Locale for more information
* @return string
*/
public function translate($messageId, $locale = null)
{
if ($locale === null) {
$locale = $this->_options['locale'];
}
$plural = null;
if (is_array($messageId)) {
if (count($messageId) > 2) {
$number = array_pop($messageId);
if (!is_numeric($number)) {
$plocale = $number;
$number = array_pop($messageId);
} else {
$plocale = 'en';
}
$plural = $messageId;
$messageId = $messageId[0];
} else {
$messageId = $messageId[0];
}
}
// CUSTOM ischommer: Skip locale checks, too computationally expensive.
// Assume correct locale value is passed in.
// if (!Zend_Locale::isLocale($locale, true, false)) {
// if (!Zend_Locale::isLocale($locale, false, false)) {
// // language does not exist, return original string
// $this->_log($messageId, $locale);
// // use rerouting when enabled
// if (!empty($this->_options['route'])) {
// if (array_key_exists($locale, $this->_options['route']) &&
// !array_key_exists($locale, $this->_routed)) {
// $this->_routed[$locale] = true;
// return $this->translate($messageId, $this->_options['route'][$locale]);
// }
// }
// $this->_routed = array();
// if ($plural === null) {
// return $messageId;
// }
// $rule = Zend_Translate_Plural::getPlural($number, $plocale);
// if (!isset($plural[$rule])) {
// $rule = 0;
// }
// return $plural[$rule];
// }
// $locale = new Zend_Locale($locale);
// }
// CUSTOM END
$locale = (string) $locale;
if ((is_string($messageId) || is_int($messageId)) && isset($this->_translate[$locale][$messageId])) {
// return original translation
if ($plural === null) {
$this->_routed = array();
return $this->_translate[$locale][$messageId];
}
$rule = Zend_Translate_Plural::getPlural($number, $locale);
if (isset($this->_translate[$locale][$plural[0]][$rule])) {
$this->_routed = array();
return $this->_translate[$locale][$plural[0]][$rule];
}
} else if (strlen($locale) != 2) {
// faster than creating a new locale and separate the leading part
$locale = substr($locale, 0, -strlen(strrchr($locale, '_')));
if ((is_string($messageId) || is_int($messageId)) && isset($this->_translate[$locale][$messageId])) {
// return regionless translation (en_US -> en)
if ($plural === null) {
$this->_routed = array();
return $this->_translate[$locale][$messageId];
}
$rule = Zend_Translate_Plural::getPlural($number, $locale);
if (isset($this->_translate[$locale][$plural[0]][$rule])) {
$this->_routed = array();
return $this->_translate[$locale][$plural[0]][$rule];
}
}
}
$this->_log($messageId, $locale);
// use rerouting when enabled
if (!empty($this->_options['route'])) {
if (array_key_exists($locale, $this->_options['route']) &&
!array_key_exists($locale, $this->_routed)) {
$this->_routed[$locale] = true;
return $this->translate($messageId, $this->_options['route'][$locale]);
}
}
$this->_routed = array();
if ($plural === null) {
return $messageId;
}
$rule = Zend_Translate_Plural::getPlural($number, $plocale);
if (!isset($plural[$rule])) {
$rule = 0;
}
return $plural[$rule];
}
/**
* Translates the given string using plural notations
* Returns the translated string
*
* @see Zend_Locale
* @param string $singular Singular translation string
* @param string $plural Plural translation string
* @param integer $number Number for detecting the correct plural
* @param string|Zend_Locale $locale (Optional) Locale/Language to use, identical with
* locale identifier, @see Zend_Locale for more information
* @return string
*/
public function plural($singular, $plural, $number, $locale = null)
{
return $this->translate(array($singular, $plural, $number), $locale);
}
/**
* Logs a message when the log option is set
*
* @param string $message Message to log
* @param String $locale Locale to log
*/
protected function _log($message, $locale) {
if ($this->_options['logUntranslated']) {
$message = str_replace('%message%', $message, $this->_options['logMessage']);
$message = str_replace('%locale%', $locale, $message);
if ($this->_options['log']) {
$this->_options['log']->log($message, $this->_options['logPriority']);
} else {
trigger_error($message, E_USER_NOTICE);
}
}
}
/**
* Translates the given string
* returns the translation
*
* @param string $messageId Translation string
* @param string|Zend_Locale $locale (optional) Locale/Language to use, identical with locale
* identifier, @see Zend_Locale for more information
* @return string
*/
public function _($messageId, $locale = null)
{
return $this->translate($messageId, $locale);
}
/**
* Checks if a string is translated within the source or not
* returns boolean
*
* @param string $messageId Translation string
* @param boolean $original (optional) Allow translation only for original language
* when true, a translation for 'en_US' would give false when it can
* be translated with 'en' only
* @param string|Zend_Locale $locale (optional) Locale/Language to use, identical with locale identifier,
* see Zend_Locale for more information
* @return boolean
*/
public function isTranslated($messageId, $original = false, $locale = null)
{
if (($original !== false) and ($original !== true)) {
$locale = $original;
$original = false;
}
if ($locale === null) {
$locale = $this->_options['locale'];
}
if (!Zend_Locale::isLocale($locale, true, false)) {
if (!Zend_Locale::isLocale($locale, false, false)) {
// language does not exist, return original string
return false;
}
$locale = new Zend_Locale($locale);
}
$locale = (string) $locale;
if ((is_string($messageId) || is_int($messageId)) && isset($this->_translate[$locale][$messageId])) {
// return original translation
return true;
} else if ((strlen($locale) != 2) and ($original === false)) {
// faster than creating a new locale and separate the leading part
$locale = substr($locale, 0, -strlen(strrchr($locale, '_')));
if ((is_string($messageId) || is_int($messageId)) && isset($this->_translate[$locale][$messageId])) {
// return regionless translation (en_US -> en)
return true;
}
}
// No translation found, return original
return false;
}
/**
* Returns the set cache
*
* @return Zend_Cache_Core The set cache
*/
public static function getCache()
{
return self::$_cache;
}
/**
* Sets a cache for all Zend_Translate_Adapters
*
* @param Zend_Cache_Core $cache Cache to store to
*/
public static function setCache(Zend_Cache_Core $cache)
{
self::$_cache = $cache;
self::_getTagSupportForCache();
}
/**
* Returns true when a cache is set
*
* @return boolean
*/
public static function hasCache()
{
if (self::$_cache !== null) {
return true;
}
return false;
}
/**
* Removes any set cache
*
* @return void
*/
public static function removeCache()
{
self::$_cache = null;
}
/**
* Clears all set cache data
*
* @param string $tag Tag to clear when the default tag name is not used
* @return void
*/
public static function clearCache($tag = null)
{
require_once 'Zend/Cache.php';
if (self::$_cacheTags) {
if ($tag == null) {
$tag = 'Zend_Translate';
}
self::$_cache->clean(Zend_Cache::CLEANING_MODE_MATCHING_TAG, array($tag));
} else {
self::$_cache->clean(Zend_Cache::CLEANING_MODE_ALL);
}
}
/**
* Returns the adapter name
*
* @return string
*/
abstract public function toString();
/**
* Internal method to check if the given cache supports tags
*
* @param Zend_Cache $cache
*/
private static function _getTagSupportForCache()
{
$backend = self::$_cache->getBackend();
if ($backend instanceof Zend_Cache_Backend_ExtendedInterface) {
$cacheOptions = $backend->getCapabilities();
self::$_cacheTags = $cacheOptions['tags'];
} else {
self::$_cacheTags = false;
}
return self::$_cacheTags;
}
}