Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 129 insertions, 0 deletions

diff --git a/qpid/dotnet/Qpid.Client/Client/Message/MessageFactoryRegistry.cs b/qpid/dotnet/Qpid.Client/Client/Message/MessageFactoryRegistry.cs
new file mode 100644
index 0000000000..fdb5e14aa6
--- /dev/null
+++ b/qpid/dotnet/Qpid.Client/Client/Message/MessageFactoryRegistry.cs
@@ -0,0 +1,129 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ *
+ */
+using System;
+using System.Collections;
+using Apache.Qpid.Framing;
+using Apache.Qpid.Messaging;
+
+namespace Apache.Qpid.Client.Message
+{
+   public class MessageFactoryRegistry
+   {
+      private readonly Hashtable _mimeToFactoryMap = new Hashtable();
+      private IMessageFactory _defaultFactory;
+
+      /// <summary>
+      /// Default factory to use for unknown message types
+      /// </summary>
+      public IMessageFactory DefaultFactory
+      {
+         get { return _defaultFactory; }
+         set { _defaultFactory = value; }
+      }
+
+      /// <summary>
+      /// Register a new message factory for a MIME type
+      /// </summary>
+      /// <param name="mimeType">Mime type to register</param>
+      /// <param name="mf"></param>
+      public void RegisterFactory(string mimeType, IMessageFactory mf)
+      {
+         if ( mf == null )
+            throw new ArgumentNullException("mf");
+         if ( mimeType == null || mimeType.Length == 0 )
+            throw new ArgumentNullException("mimeType");
+
+         _mimeToFactoryMap[mimeType] = mf;
+      }
+
+      /// <summary>
+      /// Remove a message factory
+      /// </summary>
+      /// <param name="mimeType">MIME type to unregister</param>
+      public void DeregisterFactory(string mimeType)
+      {
+         _mimeToFactoryMap.Remove(mimeType);
+      }
+
+      /// <summary>
+      /// Create a message. This looks up the MIME type from the content header and instantiates the appropriate
+      /// concrete message type.
+      /// </summary>
+      /// <param name="messageNbr">the AMQ message id</param>
+      /// <param name="redelivered">true if redelivered</param>
+      /// <param name="contentHeader">the content header that was received</param>
+      /// <param name="bodies">a list of ContentBody instances</param>
+      /// <returns>the message.</returns>
+      /// <exception cref="AMQException"/>
+      /// <exception cref="QpidException"/>
+      public AbstractQmsMessage CreateMessage(long messageNbr, bool redelivered,
+                                              ContentHeaderBody contentHeader,
+                                              IList bodies)
+      {
+         BasicContentHeaderProperties properties = (BasicContentHeaderProperties)contentHeader.Properties;
+
+         if ( properties.ContentType == null )
+         {
+            properties.ContentType = "";
+         }
+
+         IMessageFactory mf = GetFactory(properties.ContentType);
+         return mf.CreateMessage(messageNbr, redelivered, contentHeader, bodies);
+      }
+
+      /// <summary>
+      /// Create a new message of the specified type
+      /// </summary>
+      /// <param name="mimeType">The Mime type</param>
+      /// <returns>The new message</returns>
+      public AbstractQmsMessage CreateMessage(string mimeType)
+      {
+         if ( mimeType == null || mimeType.Length == 0 )
+            throw new ArgumentNullException("mimeType");
+
+         IMessageFactory mf = GetFactory(mimeType);
+         return mf.CreateMessage(mimeType);
+      }
+
+      /// <summary>
+      /// Construct a new registry with the default message factories registered
+      /// </summary>
+      /// <returns>a message factory registry</returns>
+      public static MessageFactoryRegistry NewDefaultRegistry()
+      {
+         MessageFactoryRegistry mf = new MessageFactoryRegistry();
+         mf.RegisterFactory("text/plain", new QpidTextMessageFactory());
+         mf.RegisterFactory("text/xml", new QpidTextMessageFactory());
+         mf.RegisterFactory("application/octet-stream", new QpidBytesMessageFactory());
+
+         mf.DefaultFactory = new QpidBytesMessageFactory();
+         return mf;
+      }
+
+      private IMessageFactory GetFactory(string mimeType)
+      {
+         IMessageFactory mf = (IMessageFactory)_mimeToFactoryMap[mimeType];
+         return mf != null ? mf : _defaultFactory;
+      }
+   }
+}
+
+