SMACK-225 Fixed DNS SRV handling, as per RFC 2782. Added support for multiple DNS SRV resolvers namely javax and org.xbill.dns (aka dnsjava).

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13561 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smack/util/dns/HostAddress.java

@@ -0,0 +1,93 @@
+/**
+ * Copyright 2013 Florian Schmaus
+ *
+ * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jivesoftware.smack.util.dns;
+
+public class HostAddress {
+    private String fqdn;
+    private int port;
+    private Exception exception;
+
+    /**
+     * Creates a new HostAddress with the given FQDN. The port will be set to the default XMPP client port: 5222
+     * 
+     * @param fqdn
+     * @throws IllegalArgumentException
+     */
+    public HostAddress(String fqdn) throws IllegalArgumentException {
+        if (fqdn == null)
+            throw new IllegalArgumentException("FQDN is null");
+        if (fqdn.charAt(fqdn.length() - 1) == '.') {
+            this.fqdn = fqdn.substring(0, fqdn.length() - 1);
+        }
+        else {
+            this.fqdn = fqdn;
+        }
+        // Set port to the default port for XMPP client communication
+        this.port = 5222;
+    }
+
+    public HostAddress(String fqdn, int port) throws IllegalArgumentException {
+        this(fqdn);
+        if (port < 0 || port > 65535)
+            throw new IllegalArgumentException(
+                    "DNS SRV records weight must be a 16-bit unsiged integer (i.e. between 0-65535. Port was: " + port);
+
+        this.port = port;
+    }
+
+    public String getFQDN() {
+        return fqdn;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public void setException(Exception e) {
+        this.exception = e;
+    }
+
+    public String toString() {
+        return fqdn + ":" + port;
+    }
+
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof HostAddress)) {
+            return false;
+        }
+
+        final HostAddress address = (HostAddress) o;
+
+        if (!fqdn.equals(address.fqdn)) {
+            return false;
+        }
+        return port == address.port;
+    }
+
+    public String getErrorMessage() {
+        String error;
+        if (exception == null) {
+            error = "No error logged";
+        }
+        else {
+            error = exception.getMessage();
+        }
+        return toString() + " Exception: " + error;
+    }
+}