Some more immutable classes

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@755784 13f79535-47bb-0310-9956-ffa450edef68

httpclient/src/main/java/org/apache/http/auth/params/AuthParams.java

@@ -31,6 +31,8 @@
 
 package org.apache.http.auth.params;
 
+import net.jcip.annotations.Immutable;
+
 import org.apache.http.params.HttpParams;
 import org.apache.http.protocol.HTTP;
 
@@ -45,6 +47,7 @@ import org.apache.http.protocol.HTTP;
  *
  * @see AuthPNames
  */
+@Immutable
 public final class AuthParams {
 
     private AuthParams() {

httpclient/src/main/java/org/apache/http/conn/params/ConnManagerParams.java

@@ -30,6 +30,8 @@
 
 package org.apache.http.conn.params;
 
+import net.jcip.annotations.Immutable;
+
 import org.apache.http.conn.routing.HttpRoute;
 import org.apache.http.params.HttpParams;
 
@@ -45,6 +47,7 @@ import org.apache.http.params.HttpParams;
  *
  * @see ConnManagerPNames
  */
+@Immutable
 public final class ConnManagerParams implements ConnManagerPNames {
 
     /** The default maximum number of connections allowed overall */

httpclient/src/main/java/org/apache/http/conn/params/ConnRouteParams.java

@@ -33,6 +33,8 @@ package org.apache.http.conn.params;
 
 import java.net.InetAddress;
 
+import net.jcip.annotations.Immutable;
+
 import org.apache.http.HttpHost;
 import org.apache.http.params.HttpParams;
 import org.apache.http.conn.routing.HttpRoute;
@@ -48,6 +50,7 @@ import org.apache.http.conn.routing.HttpRoute;
  * 
  * @since 4.0
  */
+@Immutable
 public class ConnRouteParams implements ConnRoutePNames {
 
     /**
@@ -56,13 +59,13 @@ public class ConnRouteParams implements ConnRoutePNames {
      * with actual hosts. Note that this is a <i>valid</i> host.
      */
     public static final HttpHost NO_HOST =
-        new HttpHost("127.0.0.255", 0, "no-host");
+        new HttpHost("127.0.0.255", 0, "no-host"); // Immutable
 
     /**
      * A special value indicating "no route".
      * This is a route with {@link #NO_HOST} as the target.
      */
-    public static final HttpRoute NO_ROUTE = new HttpRoute(NO_HOST);
+    public static final HttpRoute NO_ROUTE = new HttpRoute(NO_HOST); // Immutable
 
 
     /** Disabled default constructor. */

httpclient/src/main/java/org/apache/http/conn/routing/BasicRouteDirector.java

@@ -31,6 +31,7 @@
 
 package org.apache.http.conn.routing;
 
+import net.jcip.annotations.Immutable;
 
 
 /**
@@ -44,6 +45,7 @@ package org.apache.http.conn.routing;
  *
  * @since 4.0
  */
+@Immutable
 public class BasicRouteDirector implements HttpRouteDirector {
 
     // public default constructor