diff --git a/libreplan-webapp/src/main/java/org/libreplan/importers/IJiraOrderElementSynchronizer.java b/libreplan-webapp/src/main/java/org/libreplan/importers/IJiraOrderElementSynchronizer.java
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+/*
+ * This file is part of LibrePlan
+ *
+ * Copyright (C) 2012 Igalia, S.L.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.libreplan.importers;
+
+import java.util.List;
+
+import org.libreplan.business.advance.entities.AdvanceMeasurement;
+import org.libreplan.business.advance.entities.DirectAdvanceAssignment;
+import org.libreplan.business.orders.entities.Order;
+import org.libreplan.business.orders.entities.OrderElement;
+import org.libreplan.importers.jira.Issue;
+
+/**
+ * Synchronize order elements inclusive progress assignments and measurements of
+ * an existing order with Jira issues.
+ *
+ * Jira issues will be retrieved from Jira RESTful web service using
+ * {@link JiraRESTClient}
+ *
+ * @author Miciele Ghiorghis <m.ghiorghis@antoniusziekenhuis.nl>
+ */
+public interface IJiraOrderElementSynchronizer {
+
+    /**
+     * Gets all distinct jira lables from an external 'php' script.
+     *
+     * This is because at this moment Jira doesn't support Labels request. As
+     * workaround we build a simple php script to do the query in Jira database
+     * and returns a comma separated string(labels). Once Jira supports the
+     * labels request this method will be modified.
+     *
+     * @return A list of labels
+     */
+    List<String> getAllJiraLabels();
+
+    /**
+     * Get all jira issues based on the specified <code>label</code> parameter
+     * from jira RESTFul web service
+     *
+     * @param label
+     *            search criteria for jira issues
+     *
+     * @return list of jira issues
+     */
+    List<Issue> getJiraIssues(String label);
+
+    /**
+     * Synchronizes the list of {@link OrderElement}s,
+     * {@link DirectAdvanceAssignment}s and {@link AdvanceMeasurement}s of the
+     * given {@link Order} with jira issues.
+     *
+     * Loops through all jira <code>issues</code> and check if an
+     * {@link OrderElement} of the given <code>order</code> exists. If it
+     * exists, update the {@link OrderElement} with the issue item. If not
+     * create new {@link OrderElement}, update it with the issue item and add to
+     * the <code>order</code> and start synchronization of
+     * {@link DirectAdvanceAssignment} and {@link AdvanceMeasurement}
+     *
+     * @param order
+     *            an existing order where its orderElements will be synchronized
+     *            with jira issues
+     * @param issues
+     *            jira issues
+     */
+    void syncOrderElementsWithJiraIssues(Order order, List<Issue> issues);
+
+    /**
+     * returns synchronization info, success or fail info
+     */
+    JiraSyncInfo getJiraSyncInfo();
+
+}