765 lines
23 KiB
PHP
765 lines
23 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Application
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* @subpackage Bootstrap
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: BootstrapAbstract.php 17802 2009-08-24 21:15:12Z matthew $
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*/
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/**
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* Abstract base class for bootstrap classes
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*
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* @uses Zend_Application_Bootstrap_Bootstrapper
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* @uses Zend_Application_Bootstrap_ResourceBootstrapper
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* @category Zend
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* @package Zend_Application
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* @subpackage Bootstrap
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_Application_Bootstrap_BootstrapAbstract
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implements Zend_Application_Bootstrap_Bootstrapper,
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Zend_Application_Bootstrap_ResourceBootstrapper
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{
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/**
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* @var Zend_Application|Zend_Application_Bootstrap_Bootstrapper
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*/
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protected $_application;
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/**
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* @var array Internal resource methods (resource/method pairs)
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*/
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protected $_classResources;
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/**
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* @var object Resource container
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*/
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protected $_container;
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/**
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* @var string
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*/
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protected $_environment;
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/**
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* Flattened (lowercase) option keys used for lookups
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*
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* @var array
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*/
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protected $_optionKeys = array();
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/**
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* @var array
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*/
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protected $_options = array();
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/**
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* @var Zend_Loader_PluginLoader_Interface
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*/
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protected $_pluginLoader;
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/**
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* @var array Class-based resource plugins
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*/
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protected $_pluginResources = array();
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/**
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* @var array Initializers that have been run
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*/
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protected $_run = array();
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/**
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* @var array Initializers that have been started but not yet completed (circular dependency detection)
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*/
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protected $_started = array();
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/**
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* Constructor
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*
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* Sets application object, initializes options, and prepares list of
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* initializer methods.
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*
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* @param Zend_Application|Zend_Application_Bootstrap_Bootstrapper $application
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* @return void
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* @throws Zend_Application_Bootstrap_Exception When invalid applicaiton is provided
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*/
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public function __construct($application)
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{
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$this->setApplication($application);
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$options = $application->getOptions();
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$this->setOptions($options);
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}
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/**
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* Set class state
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*
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* @param array $options
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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*/
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public function setOptions(array $options)
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{
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$this->_options = $this->mergeOptions($this->_options, $options);
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$options = array_change_key_case($options, CASE_LOWER);
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$this->_optionKeys = array_keys($options);
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$methods = get_class_methods($this);
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foreach ($methods as $key => $method) {
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$methods[$key] = strtolower($method);
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}
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if (array_key_exists('pluginpaths', $options)) {
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$pluginLoader = $this->getPluginLoader();
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foreach ($options['pluginpaths'] as $prefix => $path) {
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$pluginLoader->addPrefixPath($prefix, $path);
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}
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unset($options['pluginpaths']);
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}
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foreach ($options as $key => $value) {
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$method = 'set' . strtolower($key);
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if (in_array($method, $methods)) {
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$this->$method($value);
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} elseif ('resources' == $key) {
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foreach ($value as $resource => $resourceOptions) {
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$this->registerPluginResource($resource, $resourceOptions);
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}
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}
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}
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return $this;
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}
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/**
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* Get current options from bootstrap
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*
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* @return array
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*/
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public function getOptions()
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{
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return $this->_options;
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}
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/**
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* Is an option present?
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*
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* @param string $key
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* @return bool
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*/
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public function hasOption($key)
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{
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return in_array($key, $this->_optionKeys);
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}
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/**
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* Retrieve a single option
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*
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* @param string $key
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* @return mixed
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*/
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public function getOption($key)
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{
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if ($this->hasOption($key)) {
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$options = $this->getOptions();
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$options = array_change_key_case($options, CASE_LOWER);
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return $options[strtolower($key)];
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}
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return null;
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}
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/**
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* Merge options recursively
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*
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* @param array $array1
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* @param mixed $array2
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* @return array
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*/
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public function mergeOptions(array $array1, $array2 = null)
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{
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if (is_array($array2)) {
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foreach ($array2 as $key => $val) {
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if (is_array($array2[$key])) {
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$array1[$key] = (array_key_exists($key, $array1) && is_array($array1[$key]))
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? $this->mergeOptions($array1[$key], $array2[$key])
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: $array2[$key];
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} else {
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$array1[$key] = $val;
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}
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}
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}
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return $array1;
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}
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/**
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* Get class resources (as resource/method pairs)
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*
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* Uses get_class_methods() by default, reflection on prior to 5.2.6,
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* as a bug prevents the usage of get_class_methods() there.
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*
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* @return array
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*/
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public function getClassResources()
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{
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if (null === $this->_classResources) {
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if (version_compare(PHP_VERSION, '5.2.6') === -1) {
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$class = new ReflectionObject($this);
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$classMethods = $class->getMethods();
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$methodNames = array();
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foreach ($classMethods as $method) {
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$methodNames[] = $method->getName();
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}
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} else {
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$methodNames = get_class_methods($this);
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}
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$this->_classResources = array();
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foreach ($methodNames as $method) {
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if (5 < strlen($method) && '_init' === substr($method, 0, 5)) {
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$this->_classResources[strtolower(substr($method, 5))] = $method;
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}
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}
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}
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return $this->_classResources;
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}
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/**
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* Get class resource names
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*
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* @return array
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*/
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public function getClassResourceNames()
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{
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$resources = $this->getClassResources();
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return array_keys($resources);
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}
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/**
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* Register a new resource plugin
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*
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* @param string|Zend_Application_Resource_Resource $resource
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* @param mixed $options
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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* @throws Zend_Application_Bootstrap_Exception When invalid resource is provided
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*/
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public function registerPluginResource($resource, $options = null)
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{
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if ($resource instanceof Zend_Application_Resource_Resource) {
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$resource->setBootstrap($this);
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$pluginName = $this->_resolvePluginResourceName($resource);
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$this->_pluginResources[$pluginName] = $resource;
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return $this;
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}
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if (!is_string($resource)) {
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throw new Zend_Application_Bootstrap_Exception('Invalid resource provided to ' . __METHOD__);
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}
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$this->_pluginResources[$resource] = $options;
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return $this;
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}
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/**
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* Unregister a resource from the bootstrap
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*
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* @param string|Zend_Application_Resource_Resource $resource
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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* @throws Zend_Application_Bootstrap_Exception When unknown resource type is provided
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*/
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public function unregisterPluginResource($resource)
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{
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if ($resource instanceof Zend_Application_Resource_Resource) {
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if ($index = array_search($resource, $this->_pluginResources, true)) {
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unset($this->_pluginResources[$index]);
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}
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return $this;
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}
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if (!is_string($resource)) {
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throw new Zend_Application_Bootstrap_Exception('Unknown resource type provided to ' . __METHOD__);
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}
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$resource = strtolower($resource);
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if (array_key_exists($resource, $this->_pluginResources)) {
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unset($this->_pluginResources[$resource]);
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}
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return $this;
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}
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/**
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* Is the requested plugin resource registered?
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*
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* @param string $resource
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* @return bool
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*/
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public function hasPluginResource($resource)
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{
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return (null !== $this->getPluginResource($resource));
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}
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/**
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* Get a registered plugin resource
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*
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* @param string $resourceName
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* @return Zend_Application_Resource_Resource
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*/
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public function getPluginResource($resource)
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{
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if (array_key_exists(strtolower($resource), $this->_pluginResources)) {
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$resource = strtolower($resource);
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if (!$this->_pluginResources[$resource] instanceof Zend_Application_Resource_Resource) {
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$resourceName = $this->_loadPluginResource($resource, $this->_pluginResources[$resource]);
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if (!$resourceName) {
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throw new Zend_Application_Bootstrap_Exception(sprintf('Unable to resolve plugin "%s"; no corresponding plugin with that name', $resource));
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}
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$resource = $resourceName;
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}
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return $this->_pluginResources[$resource];
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}
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foreach ($this->_pluginResources as $plugin => $spec) {
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if ($spec instanceof Zend_Application_Resource_Resource) {
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$pluginName = $this->_resolvePluginResourceName($spec);
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if (0 === strcasecmp($resource, $pluginName)) {
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unset($this->_pluginResources[$plugin]);
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$this->_pluginResources[$pluginName] = $spec;
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return $spec;
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}
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continue;
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}
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if (false !== $pluginName = $this->_loadPluginResource($plugin, $spec)) {
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if (0 === strcasecmp($resource, $pluginName)) {
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return $this->_pluginResources[$pluginName];
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}
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}
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if (class_exists($plugin)) {
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$spec = (array) $spec;
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$spec['bootstrap'] = $this;
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$instance = new $plugin($spec);
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$pluginName = $this->_resolvePluginResourceName($instance);
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unset($this->_pluginResources[$plugin]);
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$this->_pluginResources[$pluginName] = $instance;
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if (0 === strcasecmp($resource, $pluginName)) {
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return $instance;
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}
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}
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}
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return null;
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}
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/**
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* Retrieve all plugin resources
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*
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* @return array
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*/
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public function getPluginResources()
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{
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foreach (array_keys($this->_pluginResources) as $resource) {
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$this->getPluginResource($resource);
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}
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return $this->_pluginResources;
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}
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/**
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* Retrieve plugin resource names
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*
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* @return array
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*/
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public function getPluginResourceNames()
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{
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$this->getPluginResources();
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return array_keys($this->_pluginResources);
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}
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/**
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* Set plugin loader for loading resources
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*
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* @param Zend_Loader_PluginLoader_Interface $loader
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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*/
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public function setPluginLoader(Zend_Loader_PluginLoader_Interface $loader)
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{
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$this->_pluginLoader = $loader;
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return $this;
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}
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/**
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* Get the plugin loader for resources
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*
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* @return Zend_Loader_PluginLoader_Interface
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*/
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public function getPluginLoader()
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{
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if ($this->_pluginLoader === null) {
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$options = array(
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'Zend_Application_Resource' => 'Zend/Application/Resource'
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);
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$this->_pluginLoader = new Zend_Loader_PluginLoader($options);
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}
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return $this->_pluginLoader;
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}
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/**
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* Set application/parent bootstrap
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*
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* @param Zend_Application|Zend_Application_Bootstrap_Bootstrapper $application
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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*/
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public function setApplication($application)
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{
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if (($application instanceof Zend_Application)
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|| ($application instanceof Zend_Application_Bootstrap_Bootstrapper)
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) {
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$this->_application = $application;
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} else {
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throw new Zend_Application_Bootstrap_Exception('Invalid application provided to bootstrap constructor (received "' . get_class($application) . '" instance)');
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}
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return $this;
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}
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/**
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* Retrieve parent application instance
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*
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* @return Zend_Application|Zend_Application_Bootstrap_Bootstrapper
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*/
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public function getApplication()
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{
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return $this->_application;
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}
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/**
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* Retrieve application environment
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*
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* @return string
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*/
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public function getEnvironment()
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{
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if (null === $this->_environment) {
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$this->_environment = $this->getApplication()->getEnvironment();
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}
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return $this->_environment;
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}
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/**
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* Set resource container
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*
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* By default, if a resource callback has a non-null return value, this
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* value will be stored in a container using the resource name as the
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* key.
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*
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* Containers must be objects, and must allow setting public properties.
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*
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* @param object $container
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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*/
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public function setContainer($container)
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{
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if (!is_object($container)) {
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throw new Zend_Application_Bootstrap_Exception('Resource containers must be objects');
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}
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$this->_container = $container;
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return $this;
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}
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/**
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* Retrieve resource container
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*
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* @return object
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*/
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public function getContainer()
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{
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if (null === $this->_container) {
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$this->setContainer(new Zend_Registry());
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}
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return $this->_container;
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}
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/**
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* Determine if a resource has been stored in the container
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*
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* During bootstrap resource initialization, you may return a value. If
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* you do, it will be stored in the {@link setContainer() container}.
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* You can use this method to determine if a value was stored.
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*
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* @param string $name
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* @return bool
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*/
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public function hasResource($name)
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{
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$resource = strtolower($name);
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$container = $this->getContainer();
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return isset($container->{$resource});
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}
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/**
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* Retrieve a resource from the container
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*
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* During bootstrap resource initialization, you may return a value. If
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* you do, it will be stored in the {@link setContainer() container}.
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* You can use this method to retrieve that value.
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*
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* If no value was returned, this will return a null value.
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*
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* @param string $name
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* @return null|mixed
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*/
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public function getResource($name)
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{
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$resource = strtolower($name);
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$container = $this->getContainer();
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if ($this->hasResource($resource)) {
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return $container->{$resource};
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}
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return null;
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}
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/**
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* Implement PHP's magic to retrieve a ressource
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* in the bootstrap
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*
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* @param string $prop
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* @return null|mixed
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*/
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public function __get($prop)
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{
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return $this->getResource($prop);
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}
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/**
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* Implement PHP's magic to ask for the
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* existence of a ressource in the bootstrap
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*
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* @param string $prop
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* @return bool
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*/
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public function __isset($prop)
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{
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return $this->hasResource($prop);
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}
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/**
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* Bootstrap individual, all, or multiple resources
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*
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* Marked as final to prevent issues when subclassing and naming the
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* child class 'Bootstrap' (in which case, overriding this method
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* would result in it being treated as a constructor).
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*
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* If you need to override this functionality, override the
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* {@link _bootstrap()} method.
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*
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* @param null|string|array $resource
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* @return Zend_Application_Bootstrap_BootstrapAbstract
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* @throws Zend_Application_Bootstrap_Exception When invalid argument was passed
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*/
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final public function bootstrap($resource = null)
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{
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$this->_bootstrap($resource);
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return $this;
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}
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|
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/**
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* Overloading: intercept calls to bootstrap<resourcename>() methods
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*
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* @param string $method
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* @param array $args
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* @return void
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* @throws Zend_Application_Bootstrap_Exception On invalid method name
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*/
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public function __call($method, $args)
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{
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if (9 < strlen($method) && 'bootstrap' === substr($method, 0, 9)) {
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$resource = substr($method, 9);
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return $this->bootstrap($resource);
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}
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throw new Zend_Application_Bootstrap_Exception('Invalid method "' . $method . '"');
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}
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/**
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* Bootstrap implementation
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*
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* This method may be overridden to provide custom bootstrapping logic.
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* It is the sole method called by {@link bootstrap()}.
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*
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* @param null|string|array $resource
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* @return void
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* @throws Zend_Application_Bootstrap_Exception When invalid argument was passed
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*/
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protected function _bootstrap($resource = null)
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{
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if (null === $resource) {
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foreach ($this->getClassResourceNames() as $resource) {
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$this->_executeResource($resource);
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}
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foreach ($this->getPluginResourceNames() as $resource) {
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$this->_executeResource($resource);
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}
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} elseif (is_string($resource)) {
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$this->_executeResource($resource);
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} elseif (is_array($resource)) {
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foreach ($resource as $r) {
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$this->_executeResource($r);
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}
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} else {
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throw new Zend_Application_Bootstrap_Exception('Invalid argument passed to ' . __METHOD__);
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}
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}
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/**
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* Execute a resource
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*
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* Checks to see if the resource has already been run. If not, it searches
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* first to see if a local method matches the resource, and executes that.
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* If not, it checks to see if a plugin resource matches, and executes that
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* if found.
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*
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* Finally, if not found, it throws an exception.
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*
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* @param string $resource
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* @return void
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* @throws Zend_Application_Bootstrap_Exception When resource not found
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*/
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protected function _executeResource($resource)
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{
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$resourceName = strtolower($resource);
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if (in_array($resourceName, $this->_run)) {
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return;
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}
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if (isset($this->_started[$resourceName]) && $this->_started[$resourceName]) {
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throw new Zend_Application_Bootstrap_Exception('Circular resource dependency detected');
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}
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$classResources = $this->getClassResources();
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if (array_key_exists($resourceName, $classResources)) {
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$this->_started[$resourceName] = true;
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$method = $classResources[$resourceName];
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$return = $this->$method();
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unset($this->_started[$resourceName]);
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$this->_markRun($resource);
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if (null !== $return) {
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$this->getContainer()->{$resourceName} = $return;
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}
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return;
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}
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if ($this->hasPluginResource($resource)) {
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$this->_started[$resourceName] = true;
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$plugin = $this->getPluginResource($resource);
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$return = $plugin->init();
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unset($this->_started[$resourceName]);
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$this->_markRun($resourceName);
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if (null !== $return) {
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$this->getContainer()->{$resourceName} = $return;
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}
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return;
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}
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throw new Zend_Application_Bootstrap_Exception('Resource matching "' . $resource . '" not found');
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}
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/**
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* Load a plugin resource
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*
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* @param string $resource
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* @param array|object|null $options
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* @return string|false
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*/
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protected function _loadPluginResource($resource, $options)
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{
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$options = (array) $options;
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$options['bootstrap'] = $this;
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$className = $this->getPluginLoader()->load(strtolower($resource), false);
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if (!$className) {
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return false;
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}
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$instance = new $className($options);
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unset($this->_pluginResources[$resource]);
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if (isset($instance->_explicitType)) {
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$resource = $instance->_explicitType;
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}
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$resource = strtolower($resource);
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$this->_pluginResources[$resource] = $instance;
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return $resource;
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}
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/**
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* Mark a resource as having run
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*
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* @param string $resource
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* @return void
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*/
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protected function _markRun($resource)
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{
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if (!in_array($resource, $this->_run)) {
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$this->_run[] = $resource;
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}
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}
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/**
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* Resolve a plugin resource name
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*
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* Uses, in order of preference
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* - $_explicitType property of resource
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* - Short name of resource (if a matching prefix path is found)
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* - class name (if none of the above are true)
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*
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* The name is then cast to lowercase.
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*
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* @param Zend_Application_Resource_Resource $resource
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* @return string
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*/
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protected function _resolvePluginResourceName($resource)
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{
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if (isset($resource->_explicitType)) {
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$pluginName = $resource->_explicitType;
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} else {
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$className = get_class($resource);
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$pluginName = $className;
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$loader = $this->getPluginLoader();
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foreach ($loader->getPaths() as $prefix => $paths) {
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if (0 === strpos($className, $prefix)) {
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$pluginName = substr($className, strlen($prefix));
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$pluginName = trim($pluginName, '_');
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}
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}
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}
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$pluginName = strtolower($pluginName);
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return $pluginName;
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}
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}
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