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+<?php
+
+/**
+ * Licensed to Jasig under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for
+ * additional information regarding copyright ownership.
+ *
+ * Jasig licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * PHP Version 5
+ *
+ * @file     CAS/Request/MultiRequestInterface.php
+ * @category Authentication
+ * @package  PhpCAS
+ * @author   Adam Franco <afranco@middlebury.edu>
+ * @license  http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0
+ * @link     https://wiki.jasig.org/display/CASC/phpCAS
+ */
+
+/**
+ * This interface defines a class library for performing multiple web requests
+ * in batches. Implementations of this interface may perform requests serially
+ * or in parallel.
+ *
+ * @class    CAS_Request_MultiRequestInterface
+ * @category Authentication
+ * @package  PhpCAS
+ * @author   Adam Franco <afranco@middlebury.edu>
+ * @license  http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0
+ * @link     https://wiki.jasig.org/display/CASC/phpCAS
+ */
+interface CAS_Request_MultiRequestInterface
+{
+
+    /*********************************************************
+     * Add Requests
+    *********************************************************/
+
+    /**
+     * Add a new Request to this batch.
+     * Note, implementations will likely restrict requests to their own concrete
+     * class hierarchy.
+     *
+     * @param CAS_Request_RequestInterface $request request interface
+     *
+     * @return void
+     * @throws CAS_OutOfSequenceException If called after the Request has been
+     * sent.
+     * @throws CAS_InvalidArgumentException If passed a Request of the wrong
+     * implmentation.
+     */
+    public function addRequest (CAS_Request_RequestInterface $request);
+
+    /**
+     * Retrieve the number of requests added to this batch.
+     *
+     * @return number of request elements
+     */
+    public function getNumRequests ();
+
+    /*********************************************************
+     * 2. Send the Request
+    *********************************************************/
+
+    /**
+     * Perform the request. After sending, all requests will have their
+     * responses poulated.
+     *
+     * @return bool TRUE on success, FALSE on failure.
+     * @throws CAS_OutOfSequenceException If called multiple times.
+     */
+    public function send ();
+}