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factory.php
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Wed, Oct 1, 12:20 PM

factory.php
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<?php
/**
* @version $Id: factory.php 16156 2015-04-29 06:57:02Z alex $
* @package In-Portal
* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/
use Intechnic\InPortal\Core\kernel\utility\ClassDiscovery\ClassMapBuilder;
defined('FULL_PATH') or die('restricted access!');
class kFactory extends kBase implements kiCacheable {
/**
* Mapping between class name and file name
* where class definition can be found.
* File path absolute!
*
* @var Array
* @access protected
*/
protected $classMap = Array ();
/**
* The PSR-4 compliant namespace-to-folder mapping.
*
* @var array
*/
protected $namespaceMap = array();
/**
* Map class names to their pseudo
* class names, e.g. key=pseudo_class,
* value=real_class_name
*
* @var Array
* @access protected
*/
protected $realClasses = Array ();
/**
* Where all created objects are stored
*
* @var Array|kBase[]
* @access protected
*/
protected $Storage = Array ();
public function __construct()
{
parent::__construct();
spl_autoload_register(Array (&$this, 'autoload'));
}
/**
* Configures module-based autoloader.
*
* @return void
*/
public function configureAutoloader()
{
if ( !$this->Application->ModuleInfo ) {
$error_msg = 'Autoloader configuration can be only performed after module information is available';
throw new LogicException($error_msg);
}
$this->namespaceMap = array();
foreach ( $this->Application->ModuleInfo as $module_name => $module_info ) {
if ( $module_name == 'In-Portal' ) {
continue;
}
$this->namespaceMap[$module_info['ClassNamespace']] = rtrim($module_info['Path'], '/');
}
if ( defined('IS_INSTALL') && IS_INSTALL ) {
// During installation process all modules, because unit configs from all modules are scanned too.
$class_map_builders = ClassMapBuilder::createBuilders();
}
else {
$class_map_builders = ClassMapBuilder::createBuilders($this->Application->ModuleInfo);
}
foreach ( $class_map_builders as $class_map_builder ) {
$class_map = $class_map_builder->get();
$class_names = array_keys($class_map);
$this->classMap = array_merge($this->classMap, $class_map);
$this->realClasses = array_merge($this->realClasses, array_combine($class_names, $class_names));
}
}
/**
* Sets data from cache to object
*
* @param Array $data
* @return void
* @access public
*/
public function setFromCache(&$data)
{
$this->classMap = $data['Factory.Files'];
$this->namespaceMap = $data['Factory.Namespaces'];
$this->realClasses = $data['Factory.realClasses'];
}
/**
* Performs automatic loading of classes registered with the factory
*
* @param string $class
* @return bool|null
* @access public
*/
public function autoload($class)
{
$file = $this->findFile($class);
if ( $file ) {
kUtil::includeOnce(FULL_PATH . $file);
return true;
}
return null;
}
/**
* Finds the path to the file where the class is defined.
*
* @param string $class The name of the class
* @return string|bool The path if found, false otherwise
* @access protected
*/
protected function findFile($class)
{
if ( $class[0] == '\\' ) {
$class = substr($class, 1);
}
if ( isset($this->classMap[$class]) ) {
return $this->classMap[$class];
}
$pos = strrpos($class, '\\');
if ( $pos !== false ) {
// namespaced class name
$class_path = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)) . DIRECTORY_SEPARATOR;
$class_name = substr($class, $pos + 1);
}
else {
// PEAR-like class name
$class_path = null;
$class_name = $class;
}
$class_path .= str_replace('_', DIRECTORY_SEPARATOR, $class_name) . '.php';
foreach ( $this->namespaceMap as $namespace_prefix => $namespace_path ) {
if ( strpos($class, $namespace_prefix) === 0 ) {
$test_class_path = str_replace(
str_replace('\\', DIRECTORY_SEPARATOR, $namespace_prefix),
$namespace_path,
$class_path
);
if ( file_exists(FULL_PATH . DIRECTORY_SEPARATOR . $test_class_path) ) {
return DIRECTORY_SEPARATOR . $test_class_path;
}
}
}
return $this->classMap[$class] = false;
}
/**
* Gets object data for caching
*
* @return Array
* @access public
*/
public function getToCache()
{
ksort($this->classMap);
ksort($this->namespaceMap);
ksort($this->realClasses);
return Array (
'Factory.Files' => $this->classMap,
'Factory.Namespaces' => $this->namespaceMap,
'Factory.realClasses' => $this->realClasses,
);
}
/**
* Splits any mixing of prefix and
* special into correct ones
*
* @param string $prefix_special
* @return Array
* @access public
*/
public function processPrefix($prefix_special)
{
// l.pick, l, m.test_TagProcessor
//preg_match("/(.*)\.*(.*)(_*)(.*)/", $prefix_special, $regs);
//return Array('prefix'=>$regs[1].$regs[3].$regs[4], 'special'=>$regs[2]);
$tmp = explode('_', $prefix_special, 2);
$tmp[0] = explode('.', $tmp[0]);
$prefix = $tmp[0][0];
$prefix_special = $prefix; // new1
if ( isset($tmp[1]) ) {
$prefix .= '_' . $tmp[1];
}
$special = isset($tmp[0][1]) ? $tmp[0][1] : '';
$prefix_special .= '.' . $special; // new2
return Array ('prefix' => $prefix, 'special' => $special, 'prefix_special' => $prefix_special);
}
/**
* Returns object using params specified, creates it if is required.
*
* @param string $name Object name in factory.
* @param string $pseudo_class Pseudo class.
* @param Array $event_params Event params.
* @param Array $arguments Constructor arguments.
*
* @return kBase
*/
public function getObject($name, $pseudo_class = '', $event_params = Array (), $arguments = Array ())
{
$name = rtrim($name, '.');
if ( isset($this->Storage[$name]) ) {
return $this->Storage[$name];
}
$ret = $this->processPrefix($name);
if ( !$pseudo_class ) {
$pseudo_class = $ret['prefix'];
}
if ( defined('DEBUG_MODE') && defined('DBG_FACTORY') && DBG_FACTORY && $this->Application->isDebugMode() ) {
$this->Application->Debugger->appendHTML('<b>Creating object:</b> Pseudo class: ' . $pseudo_class . ' Prefix: ' . $name);
$this->Application->Debugger->appendTrace();
}
$this->Storage[$name] = $this->makeClass($pseudo_class, $arguments);
$this->Storage[$name]->Init($ret['prefix'], $ret['special']);
$this->Application->EventManager->runBuildEvent($ret['prefix_special'], $pseudo_class, $event_params);
return $this->Storage[$name];
}
/**
* Removes object from storage, so next time it could be created from scratch
*
* @param string $name Object's name in the Storage
* @return void
* @access public
*/
public function DestroyObject($name)
{
unset($this->Storage[$name]);
}
/**
* Checks if object with prefix passes was already created in factory
*
* @param string $name object pseudo_class, prefix
* @return bool
* @access public
*/
public function hasObject($name)
{
return isset($this->Storage[$name]);
}
/**
* Get's real class name for pseudo class, includes class file and creates class instance.
*
* Pattern: Factory Method
*
* @param string $pseudo_class Pseudo class.
* @param array $arguments Constructor arguments.
*
* @return kBase
* @throws kFactoryException When class not found.
*/
public function makeClass($pseudo_class, $arguments = Array ())
{
if ( !isset($this->realClasses[$pseudo_class]) ) {
$error_msg = 'RealClass not defined for "<strong>' . $pseudo_class . '</strong>" pseudo_class.';
$error_msg .= ' Please use "<strong>php tools/build_class_map.php</strong>" to discover new classes.';
if ( $this->Application->isInstalled() ) {
throw new kFactoryException($error_msg);
}
else {
if ( $this->Application->isDebugMode() ) {
$this->Application->Debugger->appendTrace();
}
trigger_error($error_msg, E_USER_WARNING);
}
return false;
}
$real_class = $this->realClasses[$pseudo_class];
$mem_before = memory_get_usage();
$time_before = microtime(true);
$arguments = (array)$arguments;
if ( !$arguments ) {
$class = new $real_class();
}
else {
$reflection = new ReflectionClass($real_class);
$class = $reflection->newInstanceArgs($arguments);
}
if ( defined('DEBUG_MODE') && DEBUG_MODE && defined('DBG_PROFILE_MEMORY') && DBG_PROFILE_MEMORY && $this->Application->isDebugMode() ) {
$mem_after = memory_get_usage();
$time_after = microtime(true);
$mem_used = $mem_after - $mem_before;
$time_used = $time_after - $time_before;
$this->Application->Debugger->appendHTML('Factroy created <b>' . $real_class . '</b> - used ' . round($mem_used / 1024, 3) . 'Kb time: ' . round($time_used, 5));
$this->Application->Debugger->profilerAddTotal('objects', null, $mem_used);
}
return $class;
}
/**
* Registers new class in the factory
*
* @param string $real_class Real name of class as in class declaration
* @param string $file Filename in what $real_class is declared
* @param string $pseudo_class Name under this class object will be accessed using getObject method
* @return void
* @access public
*/
public function registerClass($real_class, $file, $pseudo_class = null)
{
if ( !isset($pseudo_class) ) {
$pseudo_class = $real_class;
}
if ( !isset($this->classMap[$real_class]) ) {
$this->classMap[$real_class] = preg_replace('/^' . preg_quote(FULL_PATH, '/') . '/', '', $file, 1);
}
$this->realClasses[$pseudo_class] = $real_class;
}
/**
* Unregisters existing class from factory
*
* @param string $real_class Real name of class as in class declaration
* @param string $pseudo_class Name under this class object is accessed using getObject method
* @return void
* @access public
*/
public function unregisterClass($real_class, $pseudo_class = null)
{
unset($this->classMap[$real_class]);
}
}
class kFactoryException extends Exception {
}

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