Merged DEV/IMAP3 to HEAD

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@14654 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/util/Utf7.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2005-2009 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+ */
+package org.alfresco.util;
+
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+
+import com.beetstra.jutf7.CharsetProvider;
+
+/**
+ * 
+ * @author Mike Shavnev
+ *
+ */
+public class Utf7 
+{
+    public static final String UTF7   = "UTF-7";
+    public static final String UTF7_OPTIONAL = "X-UTF-7-OPTIONAL";
+    public static final String UTF7_MODIFIED = "X-MODIFIED-UTF-7";
+    
+	
+	
+    /**
+     * Convert string from UTF-7 characters
+     * 
+     * @param string Input string for decoding
+     * @return Decoded string
+     */
+    public static String decode(String string, String charsetName)
+    {
+        if (string.length() <= 1)
+        {
+            return string;
+        }
+        CharsetProvider provider = new CharsetProvider();
+        Charset charset = provider.charsetForName(charsetName);
+        CharBuffer charBuffer = charset.decode(ByteBuffer.wrap(string.getBytes()));
+        return charBuffer.toString();
+    }
+
+    /**
+     * Convert string to UTF-7 characters
+     * 
+     * @param string Input string for decoding
+     * @return Encoded string
+     */
+    public static String encode(String string, String charsetName)
+    {
+        if (string.length() <= 1)
+        {
+            return string;
+        }
+        CharsetProvider provider = new CharsetProvider();
+        Charset charset = provider.charsetForName(charsetName);
+        ByteBuffer byteBuffer = charset.encode(string);
+        return new String(byteBuffer.array()).substring(0, byteBuffer.limit());
+    }
+}