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<?php
/**
* @version $Id$
* @package Koowa_Service
* @subpackage Identifier
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
*/
/**
* Service Identifier
*
* Wraps identifiers of the form [application::]type.package.[.path].name
* in an object, providing public accessors and methods for derived formats.
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Service
* @subpackage Identifier
*/
class KServiceIdentifier implements KServiceIdentifierInterface
{
/**
* An associative array of application paths
*
* @var array
*/
protected static $_applications = array();
/**
* Associative array of identifier adapters
*
* @var array
*/
protected static $_locators = array();
/**
* The identifier
*
* @var string
*/
protected $_identifier = '';
/**
* The application name
*
* @var string
*/
protected $_application = '';
/**
* The identifier type [com|plg|mod]
*
* @var string
*/
protected $_type = '';
/**
* The identifier package
*
* @var string
*/
protected $_package = '';
/**
* The identifier path
*
* @var array
*/
protected $_path = array();
/**
* The identifier object name
*
* @var string
*/
protected $_name = '';
/**
* The file path
*
* @var string
*/
protected $_filepath = '';
/**
* The classname
*
* @var string
*/
protected $_classname = '';
/**
* The base path
*
* @var string
*/
protected $_basepath = '';
/**
* Constructor
*
* @param string Identifier string or object in [application::]type.package.[.path].name format
* @throws KServiceIdentifierException if the identfier is not valid
*/
public function __construct($identifier)
{
//Check if the identifier is valid
if(strpos($identifier, ':') === FALSE) {
throw new KServiceIdentifierException('Malformed identifier : '.$identifier);
}
//Get the parts
if(false === $parts = parse_url($identifier)) {
throw new KServiceIdentifierException('Malformed identifier : '.$identifier);
}
// Set the type
$this->type = $parts['scheme'];
//Set the application
if(isset($parts['host'])) {
$this->application = $parts['host'];
}
// Set the path
$this->_path = trim($parts['path'], '/');
$this->_path = explode('.', $this->_path);
// Set the extension (first part)
$this->_package = array_shift($this->_path);
// Set the name (last part)
if(count($this->_path)) {
$this->_name = array_pop($this->_path);
}
//Cache the identifier to increase performance
$this->_identifier = $identifier;
}
/**
* Serialize the identifier
*
* @return string The serialised identifier
*/
public function serialize()
{
$data = array(
'application' => $this->_application,
'type' => $this->_type,
'package' => $this->_package,
'path' => $this->_path,
'name' => $this->_name,
'identifier' => $this->_identifier,
'basepath' => $this->_basepath,
'filepath' => $this->filepath,
'classname' => $this->classname,
);
return serialize($data);
}
/**
* Unserialize the identifier
*
* @return string The serialised identifier
*/
public function unserialize($data)
{
$data = unserialize($data);
foreach($data as $property => $value) {
$this->{'_'.$property} = $value;
}
}
/**
* Set an application path
*
* @param string The name of the application
* @param string The path of the application
* @return void
*/
public static function setApplication($application, $path)
{
self::$_applications[$application] = $path;
}
/**
* Get an application path
*
* @param string The name of the application
* @return string The path of the application
*/
public static function getApplication($application)
{
return isset(self::$_applications[$application]) ? self::$_applications[$application] : null;
}
/**
* Get a list of applications
*
* @return array
*/
public static function getApplications()
{
return self::$_applications;
}
/**
* Add a identifier adapter
*
* @param object A KServiceLocator
* @return void
*/
public static function addLocator(KServiceLocatorInterface $locator)
{
self::$_locators[$locator->getType()] = $locator;
}
/**
* Get the registered adapters
*
* @return array
*/
public static function getLocators()
{
return self::$_locators;
}
/**
* Implements the virtual class properties
*
* This functions creates a string representation of the identifier.
*
* @param string The virtual property to set.
* @param string Set the virtual property to this value.
*/
public function __set($property, $value)
{
if(isset($this->{'_'.$property}))
{
//Force the path to an array
if($property == 'path')
{
if(is_scalar($value)) {
$value = (array) $value;
}
}
//Set the basepath
if($property == 'application')
{
if(!isset(self::$_applications[$value])) {
throw new KServiceIdentifierException('Unknow application : '.$value);
}
$this->_basepath = self::$_applications[$value];
}
//Set the type
if($property == 'type')
{
//Check the type
if(!isset(self::$_locators[$value])) {
throw new KServiceIdentifierException('Unknow type : '.$value);
}
}
//Set the properties
$this->{'_'.$property} = $value;
//Unset the properties
$this->_identifier = '';
$this->_classname = '';
$this->_filepath = '';
}
}
/**
* Implements access to virtual properties by reference so that it appears to be
* a public property.
*
* @param string The virtual property to return.
* @return array The value of the virtual property.
*/
public function &__get($property)
{
if(isset($this->{'_'.$property}))
{
if($property == 'filepath' && empty($this->_filepath)) {
$this->_filepath = self::$_locators[$this->_type]->findPath($this);
}
if($property == 'classname' && empty($this->_classname)) {
$this->_classname = self::$_locators[$this->_type]->findClass($this);
}
return $this->{'_'.$property};
}
}
/**
* This function checks if a virtual property is set.
*
* @param string The virtual property to return.
* @return boolean True if it exists otherwise false.
*/
public function __isset($property)
{
return isset($this->{'_'.$property});
}
/**
* Formats the indentifier as a [application::]type.package.[.path].name string
*
* @return string
*/
public function __toString()
{
if($this->_identifier == '')
{
if(!empty($this->_type)) {
$this->_identifier .= $this->_type;
}
if(!empty($this->_application)) {
$this->_identifier .= '://'.$this->_application.'/';
} else {
$this->_identifier .= ':';
}
if(!empty($this->_package)) {
$this->_identifier .= $this->_package;
}
if(count($this->_path)) {
$this->_identifier .= '.'.implode('.',$this->_path);
}
if(!empty($this->_name)) {
$this->_identifier .= '.'.$this->_name;
}
}
return $this->_identifier;
}
}
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