namespace Symfony\Component\DependencyInjection\Loader;
+use Symfony\Component\DependencyInjection\ChildDefinition;
use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\Config\Loader\FileLoader as BaseFileLoader;
use Symfony\Component\Config\FileLocatorInterface;
+use Symfony\Component\Config\Resource\GlobResource;
/**
* FileLoader is the abstract class used by all built-in loaders that are file based.
abstract class FileLoader extends BaseFileLoader
{
protected $container;
+ protected $isLoadingInstanceof = false;
+ protected $instanceof = array();
- /**
- * @param ContainerBuilder $container A ContainerBuilder instance
- * @param FileLocatorInterface $locator A FileLocator instance
- */
public function __construct(ContainerBuilder $container, FileLocatorInterface $locator)
{
$this->container = $container;
parent::__construct($locator);
}
+
+ /**
+ * Registers a set of classes as services using PSR-4 for discovery.
+ *
+ * @param Definition $prototype A definition to use as template
+ * @param string $namespace The namespace prefix of classes in the scanned directory
+ * @param string $resource The directory to look for classes, glob-patterns allowed
+ * @param string $exclude A globed path of files to exclude
+ */
+ public function registerClasses(Definition $prototype, $namespace, $resource, $exclude = null)
+ {
+ if ('\\' !== substr($namespace, -1)) {
+ throw new InvalidArgumentException(sprintf('Namespace prefix must end with a "\\": %s.', $namespace));
+ }
+ if (!preg_match('/^(?:[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+\\\\)++$/', $namespace)) {
+ throw new InvalidArgumentException(sprintf('Namespace is not a valid PSR-4 prefix: %s.', $namespace));
+ }
+
+ $classes = $this->findClasses($namespace, $resource, $exclude);
+ // prepare for deep cloning
+ $serializedPrototype = serialize($prototype);
+ $interfaces = array();
+ $singlyImplemented = array();
+
+ foreach ($classes as $class => $errorMessage) {
+ if (interface_exists($class, false)) {
+ $interfaces[] = $class;
+ } else {
+ $this->setDefinition($class, $definition = unserialize($serializedPrototype));
+ if (null !== $errorMessage) {
+ $definition->addError($errorMessage);
+
+ continue;
+ }
+ foreach (class_implements($class, false) as $interface) {
+ $singlyImplemented[$interface] = isset($singlyImplemented[$interface]) ? false : $class;
+ }
+ }
+ }
+ foreach ($interfaces as $interface) {
+ if (!empty($singlyImplemented[$interface])) {
+ $this->container->setAlias($interface, $singlyImplemented[$interface])
+ ->setPublic(false);
+ }
+ }
+ }
+
+ /**
+ * Registers a definition in the container with its instanceof-conditionals.
+ *
+ * @param string $id
+ * @param Definition $definition
+ */
+ protected function setDefinition($id, Definition $definition)
+ {
+ if ($this->isLoadingInstanceof) {
+ if (!$definition instanceof ChildDefinition) {
+ throw new InvalidArgumentException(sprintf('Invalid type definition "%s": ChildDefinition expected, "%s" given.', $id, get_class($definition)));
+ }
+ $this->instanceof[$id] = $definition;
+ } else {
+ $this->container->setDefinition($id, $definition instanceof ChildDefinition ? $definition : $definition->setInstanceofConditionals($this->instanceof));
+ }
+ }
+
+ private function findClasses($namespace, $pattern, $excludePattern)
+ {
+ $parameterBag = $this->container->getParameterBag();
+
+ $excludePaths = array();
+ $excludePrefix = null;
+ if ($excludePattern) {
+ $excludePattern = $parameterBag->unescapeValue($parameterBag->resolveValue($excludePattern));
+ foreach ($this->glob($excludePattern, true, $resource) as $path => $info) {
+ if (null === $excludePrefix) {
+ $excludePrefix = $resource->getPrefix();
+ }
+
+ // normalize Windows slashes
+ $excludePaths[str_replace('\\', '/', $path)] = true;
+ }
+ }
+
+ $pattern = $parameterBag->unescapeValue($parameterBag->resolveValue($pattern));
+ $classes = array();
+ $extRegexp = defined('HHVM_VERSION') ? '/\\.(?:php|hh)$/' : '/\\.php$/';
+ $prefixLen = null;
+ foreach ($this->glob($pattern, true, $resource) as $path => $info) {
+ if (null === $prefixLen) {
+ $prefixLen = strlen($resource->getPrefix());
+
+ if ($excludePrefix && 0 !== strpos($excludePrefix, $resource->getPrefix())) {
+ throw new InvalidArgumentException(sprintf('Invalid "exclude" pattern when importing classes for "%s": make sure your "exclude" pattern (%s) is a subset of the "resource" pattern (%s)', $namespace, $excludePattern, $pattern));
+ }
+ }
+
+ if (isset($excludePaths[str_replace('\\', '/', $path)])) {
+ continue;
+ }
+
+ if (!preg_match($extRegexp, $path, $m) || !$info->isReadable()) {
+ continue;
+ }
+ $class = $namespace.ltrim(str_replace('/', '\\', substr($path, $prefixLen, -strlen($m[0]))), '\\');
+
+ if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+$/', $class)) {
+ continue;
+ }
+
+ try {
+ $r = $this->container->getReflectionClass($class);
+ } catch (\ReflectionException $e) {
+ $classes[$class] = sprintf(
+ 'While discovering services from namespace "%s", an error was thrown when processing the class "%s": "%s".',
+ $namespace,
+ $class,
+ $e->getMessage()
+ );
+ continue;
+ }
+ // check to make sure the expected class exists
+ if (!$r) {
+ throw new InvalidArgumentException(sprintf('Expected to find class "%s" in file "%s" while importing services from resource "%s", but it was not found! Check the namespace prefix used with the resource.', $class, $path, $pattern));
+ }
+
+ if ($r->isInstantiable() || $r->isInterface()) {
+ $classes[$class] = null;
+ }
+ }
+
+ // track only for new & removed files
+ if ($resource instanceof GlobResource) {
+ $this->container->addResource($resource);
+ } else {
+ foreach ($resource as $path) {
+ $this->container->fileExists($path, false);
+ }
+ }
+
+ return $classes;
+ }
}
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