Updated string utils with simple jid parsing.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@258 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/util/StringUtils.java

@@ -871,4 +871,100 @@ public class StringUtils {
     public static final String dateToMillis(Date date) {
         return zeroPadString(Long.toString(date.getTime()), 15);
     }
+
+    /**
+         * Returns the name portion of a XMPP address. For example, for the
+         * address "matt@jivesoftware.com/Smack", "matt" would be returned. If no
+         * username is present in the address, the empty string will be returned.
+         *
+         * @param XMPPAddress the XMPP address.
+         * @return the name portion of the XMPP address.
+         */
+        public static String parseName(String XMPPAddress) {
+            if (XMPPAddress == null) {
+                return null;
+            }
+            int atIndex = XMPPAddress.indexOf("@");
+            if (atIndex <= 0) {
+                return "";
+            }
+            else {
+                return XMPPAddress.substring(0, atIndex);
+            }
+        }
+
+        /**
+         * Returns the server portion of a XMPP address. For example, for the
+         * address "matt@jivesoftware.com/Smack", "jivesoftware.com" would be returned.
+         * If no server is present in the address, the empty string will be returned.
+         *
+         * @param XMPPAddress the XMPP address.
+         * @return the server portion of the XMPP address.
+         */
+        public static String parseServer(String XMPPAddress) {
+            if (XMPPAddress == null) {
+                return null;
+            }
+            int atIndex = XMPPAddress.indexOf("@");
+            // If the String ends with '@', return the empty string.
+            if (atIndex + 1 > XMPPAddress.length()) {
+                return "";
+            }
+            if (atIndex < 0) {
+                atIndex = 0;
+            }
+            int slashIndex = XMPPAddress.indexOf("/");
+            if (slashIndex > 0) {
+                return XMPPAddress.substring(atIndex + 1, slashIndex);
+            }
+            else {
+                return XMPPAddress.substring(atIndex + 1);
+            }
+        }
+
+        /**
+         * Returns the resource portion of a XMPP address. For example, for the
+         * address "matt@jivesoftware.com/Smack", "Smack" would be returned. If no
+         * resource is present in the address, the empty string will be returned.
+         *
+         * @param XMPPAddress the XMPP address.
+         * @return the resource portion of the XMPP address.
+         */
+        public static String parseResource(String XMPPAddress) {
+            if (XMPPAddress == null) {
+                return null;
+            }
+            int slashIndex = XMPPAddress.indexOf("/");
+            if (slashIndex + 1 > XMPPAddress.length() || slashIndex < 0) {
+                return "";
+            }
+            else {
+                return XMPPAddress.substring(slashIndex + 1);
+            }
+        }
+
+        /**
+         * Returns the XMPP address with any resource information removed. For example,
+         * for the address "matt@jivesoftware.com/Smack", "matt@jivesoftware.com" would
+         * be returned.
+         *
+         * @param XMPPAddress the XMPP address.
+         * @return the bare XMPP address without resource information.
+         */
+        public static String parseBareAddress(String XMPPAddress) {
+            if (XMPPAddress == null) {
+                return null;
+            }
+            int slashIndex = XMPPAddress.indexOf("/");
+            if (slashIndex < 0) {
+                return XMPPAddress;
+            }
+            else if (slashIndex == 0) {
+                return "";
+            }
+            else {
+                return XMPPAddress.substring(0, slashIndex);
+            }
+        }
+
 }
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