132 lines
3.6 KiB
PHP
132 lines
3.6 KiB
PHP
<?php
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/**
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* ownCloud - App Framework
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*
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* @author Bernhard Posselt
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* @copyright 2014 Bernhard Posselt <dev@bernhard-posselt.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC\AppFramework\Utility;
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use \OCP\AppFramework\QueryException;
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/**
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* Class SimpleContainer
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*
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* SimpleContainer is a simple implementation of IContainer on basis of \Pimple
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*/
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class SimpleContainer extends \Pimple\Container implements \OCP\IContainer {
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/**
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* @param \ReflectionClass $class the class to instantiate
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* @return \stdClass the created class
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*/
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private function buildClass(\ReflectionClass $class) {
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$constructor = $class->getConstructor();
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if ($constructor === null) {
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return $class->newInstance();
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} else {
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$parameters = [];
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foreach ($constructor->getParameters() as $parameter) {
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$parameterClass = $parameter->getClass();
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// try to find out if it is a class or a simple parameter
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if ($parameterClass === null) {
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$resolveName = $parameter->getName();
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} else {
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$resolveName = $parameterClass->name;
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}
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$parameters[] = $this->query($resolveName);
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}
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return $class->newInstanceArgs($parameters);
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}
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}
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/**
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* If a parameter is not registered in the container try to instantiate it
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* by using reflection to find out how to build the class
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* @param string $name the class name to resolve
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* @return \stdClass
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* @throws QueryException if the class could not be found or instantiated
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*/
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private function resolve($name) {
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$baseMsg = 'Could not resolve ' . $name . '!';
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try {
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$class = new \ReflectionClass($name);
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if ($class->isInstantiable()) {
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return $this->buildClass($class);
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} else {
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throw new QueryException($baseMsg .
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' Class can not be instantiated');
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}
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} catch(\ReflectionException $e) {
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throw new QueryException($baseMsg . ' ' . $e->getMessage());
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}
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}
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/**
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* @param string $name name of the service to query for
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* @return mixed registered service for the given $name
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* @throws QueryException if the query could not be resolved
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*/
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public function query($name) {
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if ($this->offsetExists($name)) {
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return $this->offsetGet($name);
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} else {
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$object = $this->resolve($name);
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$this->registerService($name, function () use ($object) {
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return $object;
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});
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return $object;
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}
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}
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/**
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* @param string $name
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* @param mixed $value
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*/
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function registerParameter($name, $value) {
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$this[$name] = $value;
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}
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/**
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* The given closure is call the first time the given service is queried.
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* The closure has to return the instance for the given service.
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* Created instance will be cached in case $shared is true.
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*
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* @param string $name name of the service to register another backend for
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* @param \Closure $closure the closure to be called on service creation
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* @param bool $shared
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*/
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function registerService($name, \Closure $closure, $shared = true) {
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if (isset($this[$name])) {
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unset($this[$name]);
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}
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if ($shared) {
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$this[$name] = $closure;
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} else {
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$this[$name] = parent::factory($closure);
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}
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}
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}
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