RM-2776 Move SortDirection to rm-community.

This is a general-use enum, and so it should be somewhere fairly accessible.

rm-community/rm-community-repo/source/java/org/alfresco/util/SortDirection.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2005-2016 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util;
+
+import org.alfresco.error.AlfrescoRuntimeException;
+
+/**
+ * Enumeration for sort direction.
+ *
+ * @author Tuna Aksoy
+ * @since 2.5
+ */
+public enum SortDirection
+{
+    ASC ("asc"),
+    DESC ("desc");
+
+    /** A string representation of the sort direction. */
+    private final String sortDirection;
+
+    private SortDirection(String sortDirection)
+    {
+        this.sortDirection = sortDirection;
+    }
+
+    /**
+     * Get the appropriate {@code SortDirection} from a string representation.
+     *
+     * @param sortDirectionString A string representation (case will be ignored).
+     * @return The {@code SortDirection} value.
+     */
+    public static SortDirection getSortDirection(String sortDirectionString)
+    {
+        SortDirection sortDirection = null;
+
+        for (SortDirection value : values())
+        {
+            if (value.sortDirection.equalsIgnoreCase(sortDirectionString))
+            {
+                sortDirection = value;
+                break;
+            }
+        }
+
+        if (sortDirection == null)
+        {
+            throw new AlfrescoRuntimeException("Sort direction '" + sortDirection +"' unknown.");
+        }
+
+        return sortDirection;
+    }
+}