Add ConnectionConfiguration.setHostAddressByNameOrIp(CharSequence fqdnOrIp)

smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java

@@ -18,6 +18,7 @@
 package org.jivesoftware.smack;
 
 import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.security.KeyStore;
 import java.util.Arrays;
 import java.util.Collection;
@@ -45,6 +46,7 @@ import org.jxmpp.jid.impl.JidCreate;
 import org.jxmpp.jid.parts.Resourcepart;
 import org.jxmpp.stringprep.XmppStringprepException;
 import org.minidns.dnsname.DnsName;
+import org.minidns.util.InetAddressUtil;
 
 /**
  * Configuration to use while establishing the connection to the server.
@@ -171,6 +173,14 @@ public abstract class ConnectionConfiguration {
 
     }
 
+    DnsName getHost() {
+        return host;
+    }
+
+    InetAddress getHostAddress() {
+        return hostAddress;
+    }
+
     /**
      * Returns the server name of the target server.
      *
@@ -642,6 +652,33 @@ public abstract class ConnectionConfiguration {
             return getThis();
         }
 
+        /**
+         * Set the host to connect to by either its fully qualified domain name (FQDN) or its IP.
+         *
+         * @param fqdnOrIp a CharSequence either representing the FQDN or the IP of the host.
+         * @return a reference to this builder.
+         * @see #setHost(DnsName)
+         * @see #setHostAddress(InetAddress)
+         * @since 4.3.2
+         */
+        public B setHostAddressByNameOrIp(CharSequence fqdnOrIp) {
+            String fqdnOrIpString = fqdnOrIp.toString();
+            if (InetAddressUtil.isIpAddress(fqdnOrIp)) {
+                InetAddress hostInetAddress;
+                try {
+                    hostInetAddress = InetAddress.getByName(fqdnOrIpString);
+                }
+                catch (UnknownHostException e) {
+                    // Should never happen.
+                    throw new AssertionError(e);
+                }
+                setHostAddress(hostInetAddress);
+            } else {
+                setHost(fqdnOrIpString);
+            }
+            return getThis();
+        }
+
         public B setPort(int port) {
             if (port < 0 || port > 65535) {
                 throw new IllegalArgumentException(

smack-core/src/test/java/org/jivesoftware/smack/ConnectionConfigurationTest.java

@@ -0,0 +1,79 @@
+/**
+ *
+ * Copyright 2018 Florian Schmaus.
+ *
+ * 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;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.jxmpp.jid.JidTestUtil;
+
+public class ConnectionConfigurationTest {
+
+    @Test
+    public void setIp() {
+        DummyConnectionConfiguration.Builder builder = newUnitTestBuilder();
+
+        final String ip = "192.168.0.1";
+        builder.setHostAddressByNameOrIp(ip);
+
+        DummyConnectionConfiguration connectionConfiguration = builder.build();
+        assertEquals('/' + ip, connectionConfiguration.getHostAddress().toString());
+    }
+
+    @Test
+    public void setFqdn() {
+        DummyConnectionConfiguration.Builder builder = newUnitTestBuilder();
+
+        final String fqdn = "foo.example.org";
+        builder.setHostAddressByNameOrIp(fqdn);
+
+        DummyConnectionConfiguration connectionConfiguration = builder.build();
+        assertEquals(fqdn, connectionConfiguration.getHost().toString());
+    }
+
+    private static DummyConnectionConfiguration.Builder newUnitTestBuilder() {
+        DummyConnectionConfiguration.Builder builder = DummyConnectionConfiguration.builder();
+        builder.setXmppDomain(JidTestUtil.DOMAIN_BARE_JID_1);
+        return builder;
+    }
+
+    private static final class DummyConnectionConfiguration extends ConnectionConfiguration {
+
+        protected DummyConnectionConfiguration(Builder builder) {
+            super(builder);
+        }
+
+        public static Builder builder() {
+            return new Builder();
+        }
+
+        private static final class Builder
+                        extends ConnectionConfiguration.Builder<Builder, DummyConnectionConfiguration> {
+
+            @Override
+            public DummyConnectionConfiguration build() {
+                return new DummyConnectionConfiguration(this);
+            }
+
+            @Override
+            protected Builder getThis() {
+                return this;
+            }
+
+        }
+    }
+}