--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Routing\Generator;
+
+use Symfony\Component\Routing\Exception\InvalidParameterException;
+use Symfony\Component\Routing\Exception\MissingMandatoryParametersException;
+use Symfony\Component\Routing\Exception\RouteNotFoundException;
+use Symfony\Component\Routing\RequestContextAwareInterface;
+
+/**
+ * UrlGeneratorInterface is the interface that all URL generator classes must implement.
+ *
+ * The constants in this interface define the different types of resource references that
+ * are declared in RFC 3986: http://tools.ietf.org/html/rfc3986
+ * We are using the term "URL" instead of "URI" as this is more common in web applications
+ * and we do not need to distinguish them as the difference is mostly semantical and
+ * less technical. Generating URIs, i.e. representation-independent resource identifiers,
+ * is also possible.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Tobias Schultze <http://tobion.de>
+ */
+interface UrlGeneratorInterface extends RequestContextAwareInterface
+{
+ /**
+ * Generates an absolute URL, e.g. "http://example.com/dir/file".
+ */
+ const ABSOLUTE_URL = 0;
+
+ /**
+ * Generates an absolute path, e.g. "/dir/file".
+ */
+ const ABSOLUTE_PATH = 1;
+
+ /**
+ * Generates a relative path based on the current request path, e.g. "../parent-file".
+ *
+ * @see UrlGenerator::getRelativePath()
+ */
+ const RELATIVE_PATH = 2;
+
+ /**
+ * Generates a network path, e.g. "//example.com/dir/file".
+ * Such reference reuses the current scheme but specifies the host.
+ */
+ const NETWORK_PATH = 3;
+
+ /**
+ * Generates a URL or path for a specific route based on the given parameters.
+ *
+ * Parameters that reference placeholders in the route pattern will substitute them in the
+ * path or host. Extra params are added as query string to the URL.
+ *
+ * When the passed reference type cannot be generated for the route because it requires a different
+ * host or scheme than the current one, the method will return a more comprehensive reference
+ * that includes the required params. For example, when you call this method with $referenceType = ABSOLUTE_PATH
+ * but the route requires the https scheme whereas the current scheme is http, it will instead return an
+ * ABSOLUTE_URL with the https scheme and the current host. This makes sure the generated URL matches
+ * the route in any case.
+ *
+ * If there is no route with the given name, the generator must throw the RouteNotFoundException.
+ *
+ * @param string $name The name of the route
+ * @param mixed $parameters An array of parameters
+ * @param int $referenceType The type of reference to be generated (one of the constants)
+ *
+ * @return string The generated URL
+ *
+ * @throws RouteNotFoundException If the named route doesn't exist
+ * @throws MissingMandatoryParametersException When some parameters are missing that are mandatory for the route
+ * @throws InvalidParameterException When a parameter value for a placeholder is not correct because
+ * it does not match the requirement
+ */
+ public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH);
+}