114 lines
2.5 KiB
PHP
114 lines
2.5 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
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namespace Icinga\Application;
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/**
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* PSR-4 class loader
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*/
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class ClassLoader
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{
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/**
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* Namespace separator
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*/
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const NAMESPACE_SEPARATOR = '\\';
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/**
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* Namespaces
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*
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* @var array
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*/
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private $namespaces = array();
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/**
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* Register a base directory for a namespace prefix
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*
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* @param string $namespace
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* @param string $directory
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*
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* @return $this
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*/
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public function registerNamespace($namespace, $directory)
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{
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$this->namespaces[$namespace] = $directory;
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return $this;
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}
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/**
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* Test whether a namespace exists
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*
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* @param string $namespace
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*
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* @return bool
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*/
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public function hasNamespace($namespace)
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{
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return array_key_exists($namespace, $this->namespaces);
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}
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/**
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* Get the source file of the given class or interface
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*
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* @param string $class Name of the class or interface
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*
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* @return string|null
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*/
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public function getSourceFile($class)
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{
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foreach ($this->namespaces as $namespace => $dir) {
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if ($class === strstr($class, $namespace)) {
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$classPath = str_replace(
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self::NAMESPACE_SEPARATOR,
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DIRECTORY_SEPARATOR,
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substr($class, strlen($namespace))
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) . '.php';
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if (file_exists($file = $dir . $classPath)) {
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return $file;
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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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* Load the given class or interface
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*
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* @param string $class Name of the class or interface
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*
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* @return bool Whether the class or interface has been loaded
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*/
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public function loadClass($class)
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{
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if ($file = $this->getSourceFile($class)) {
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require $file;
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return true;
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}
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return false;
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}
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/**
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* Register {@link loadClass()} as an autoloader
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*/
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public function register()
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{
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spl_autoload_register(array($this, 'loadClass'));
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}
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/**
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* Unregister {@link loadClass()} as an autoloader
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*/
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public function unregister()
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{
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spl_autoload_unregister(array($this, 'loadClass'));
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}
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/**
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* Unregister this as an autoloader
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*/
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public function __destruct()
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{
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$this->unregister();
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}
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}
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