this.namespaceRegistry = namespaceRegistry != null ? namespaceRegistry : new ThreadSafeNamespaceRegistry(
new SimpleNamespaceRegistry());
this.valueFactories = valueFactories == null ? new StandardValueFactories(this.namespaceRegistry) : valueFactories;
this.propertyFactory = propertyFactory == null ? new BasicPropertyFactory(this.valueFactories) : propertyFactory;
this.classLoaderFactory = classLoaderFactory == null ? new StandardClassLoaderFactory() : classLoaderFactory;
this.mimeTypeDetector = mimeTypeDetector != null ? mimeTypeDetector : new ExtensionBasedMimeTypeDetector();
}