104 lines
2.5 KiB
PHP
104 lines
2.5 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Templating;
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/**
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* DelegatingEngine selects an engine for a given template.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class DelegatingEngine implements EngineInterface, StreamingEngineInterface
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{
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/**
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* @var EngineInterface[]
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*/
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protected $engines = [];
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/**
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* @param EngineInterface[] $engines An array of EngineInterface instances to add
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*/
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public function __construct(array $engines = [])
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{
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foreach ($engines as $engine) {
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$this->addEngine($engine);
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function render($name, array $parameters = [])
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{
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return $this->getEngine($name)->render($name, $parameters);
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}
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/**
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* {@inheritdoc}
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*/
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public function stream($name, array $parameters = [])
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{
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$engine = $this->getEngine($name);
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if (!$engine instanceof StreamingEngineInterface) {
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throw new \LogicException(sprintf('Template "%s" cannot be streamed as the engine supporting it does not implement StreamingEngineInterface.', $name));
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}
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$engine->stream($name, $parameters);
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}
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/**
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* {@inheritdoc}
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*/
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public function exists($name)
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{
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return $this->getEngine($name)->exists($name);
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}
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public function addEngine(EngineInterface $engine)
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{
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$this->engines[] = $engine;
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}
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/**
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* {@inheritdoc}
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*/
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public function supports($name)
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{
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try {
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$this->getEngine($name);
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} catch (\RuntimeException $e) {
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return false;
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}
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return true;
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}
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/**
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* Get an engine able to render the given template.
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*
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* @param string|TemplateReferenceInterface $name A template name or a TemplateReferenceInterface instance
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*
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* @return EngineInterface The engine
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*
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* @throws \RuntimeException if no engine able to work with the template is found
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*/
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public function getEngine($name)
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{
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foreach ($this->engines as $engine) {
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if ($engine->supports($name)) {
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return $engine;
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}
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}
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throw new \RuntimeException(sprintf('No engine is able to work with the template "%s".', $name));
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}
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}
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