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+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCP\Migration;
+
+/**
+ * Interface IOutput
+ *
+ * @package OCP\Migration
+ * @since 9.1.0
+ */
+interface IOutput {
+
+ /**
+ * @param string $message
+ * @since 9.1.0
+ */
+ public function info($message);
+
+ /**
+ * @param string $message
+ * @since 9.1.0
+ */
+ public function warning($message);
+
+ /**
+ * @param int $max
+ * @since 9.1.0
+ */
+ public function startProgress($max = 0);
+
+ /**
+ * @param int $step
+ * @param string $description
+ * @since 9.1.0
+ */
+ public function advance($step = 1, $description = '');
+
+ /**
+ * @param int $max
+ * @since 9.1.0
+ */
+ public function finishProgress();
+
+}