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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_XmlRpc
  * @subpackage Server
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * Zend_XmlRpc_Fault
  */
 // require_once 'Zend/XmlRpc/Fault.php';
 
 
 /**
  * XMLRPC Server Faults
  *
  * Encapsulates an exception for use as an XMLRPC fault response. Valid
  * exception classes that may be used for generating the fault code and fault
  * string can be attached using {@link attachFaultException()}; all others use a
  * generic '404 Unknown error' response.
  *
  * You may also attach fault observers, which would allow you to monitor
  * particular fault cases; this is done via {@link attachObserver()}. Observers
  * need only implement a static 'observe' method.
  *
  * To allow method chaining, you may use the {@link getInstance()} factory
  * to instantiate a Zend_XmlRpc_Server_Fault.
  *
  * @category   Zend
  * @package    Zend_XmlRpc
  * @subpackage Server
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_XmlRpc_Server_Fault extends Zend_XmlRpc_Fault
 {
     /**
      * @var Exception
      */
     protected $_exception;
 
     /**
      * @var array Array of exception classes that may define xmlrpc faults
      */
     protected static $_faultExceptionClasses = array('Zend_XmlRpc_Server_Exception' => true);
 
     /**
      * @var array Array of fault observers
      */
     protected static $_observers = array();
 
     /**
      * Constructor
      *
      * @param Exception $e
      * @return Zend_XmlRpc_Server_Fault
      */
     public function __construct(Exception $e)
     {
         $this->_exception = $e;
         $code             = 404;
         $message          = 'Unknown error';
         $exceptionClass   = get_class($e);
 
         foreach (array_keys(self::$_faultExceptionClasses) as $class) {
             if ($e instanceof $class) {
                 $code    = $e->getCode();
                 $message = $e->getMessage();
                 break;
             }
         }
 
         parent::__construct($code, $message);
 
         // Notify exception observers, if present
         if (!empty(self::$_observers)) {
             foreach (array_keys(self::$_observers) as $observer) {
                 call_user_func(array($observer, 'observe'), $this);
             }
         }
     }
 
     /**
      * Return Zend_XmlRpc_Server_Fault instance
      *
      * @param Exception $e
      * @return Zend_XmlRpc_Server_Fault
      */
     public static function getInstance(Exception $e)
     {
         return new self($e);
     }
 
     /**
      * Attach valid exceptions that can be used to define xmlrpc faults
      *
      * @param string|array $classes Class name or array of class names
      * @return void
      */
     public static function attachFaultException($classes)
     {
         if (!is_array($classes)) {
             $classes = (array) $classes;
         }
 
         foreach ($classes as $class) {
             if (is_string($class) && class_exists($class)) {
                 self::$_faultExceptionClasses[$class] = true;
             }
         }
     }
 
     /**
      * Detach fault exception classes
      *
      * @param string|array $classes Class name or array of class names
      * @return void
      */
     public static function detachFaultException($classes)
     {
         if (!is_array($classes)) {
             $classes = (array) $classes;
         }
 
         foreach ($classes as $class) {
             if (is_string($class) && isset(self::$_faultExceptionClasses[$class])) {
                 unset(self::$_faultExceptionClasses[$class]);
             }
         }
     }
 
     /**
      * Attach an observer class
      *
      * Allows observation of xmlrpc server faults, thus allowing logging or mail
      * notification of fault responses on the xmlrpc server.
      *
      * Expects a valid class name; that class must have a public static method
      * 'observe' that accepts an exception as its sole argument.
      *
      * @param string $class
      * @return boolean
      */
     public static function attachObserver($class)
     {
         if (!is_string($class)
             || !class_exists($class)
             || !is_callable(array($class, 'observe')))
         {
             return false;
         }
 
         if (!isset(self::$_observers[$class])) {
             self::$_observers[$class] = true;
         }
 
         return true;
     }
 
     /**
      * Detach an observer
      *
      * @param string $class
      * @return boolean
      */
     public static function detachObserver($class)
     {
         if (!isset(self::$_observers[$class])) {
             return false;
         }
 
         unset(self::$_observers[$class]);
         return true;
     }
 
     /**
      * Retrieve the exception
      *
      * @access public
      * @return Exception
      */
     public function getException()
     {
         return $this->_exception;
     }
 }