| /* |
| * 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 Amqp.Framing; |
| using Amqp.Types; |
| using Apache.NMS.AMQP.Message.Facade; |
| using Apache.NMS.AMQP.Util; |
| |
| namespace Apache.NMS.AMQP.Provider.Amqp.Message |
| { |
| public class AmqpCodec |
| { |
| public static INmsMessageFacade DecodeMessage(IAmqpConsumer consumer, global::Amqp.Message amqpMessage) |
| { |
| // First we try the easy way, if the annotation is there we don't have to work hard. |
| AmqpNmsMessageFacade result = CreateFromMsgAnnotation(amqpMessage); |
| if (result == null) |
| { |
| // Next, match specific section structures and content types |
| result = CreateWithoutAnnotation(amqpMessage.BodySection, amqpMessage.Properties); |
| } |
| |
| if (result != null) |
| { |
| result.Initialize(consumer, amqpMessage); |
| return result; |
| } |
| |
| throw new NMSException("Could not create a NMS message from incoming message"); |
| } |
| |
| private static AmqpNmsMessageFacade CreateFromMsgAnnotation(global::Amqp.Message message) |
| { |
| object annotation = message.MessageAnnotations?[SymbolUtil.JMSX_OPT_MSG_TYPE]; |
| |
| if (annotation != null) |
| { |
| sbyte type = Convert.ToSByte(annotation); |
| switch (type) |
| { |
| case MessageSupport.JMS_TYPE_MSG: |
| return new AmqpNmsMessageFacade(); |
| case MessageSupport.JMS_TYPE_TXT: |
| return new AmqpNmsTextMessageFacade(); |
| case MessageSupport.JMS_TYPE_STRM: |
| return new AmqpNmsStreamMessageFacade(); |
| case MessageSupport.JMS_TYPE_MAP: |
| return new AmqpNmsMapMessageFacade(); |
| case MessageSupport.JMS_TYPE_BYTE: |
| // Java serialized objects should be treated as bytes messages |
| // as we cannot deserialize them in .NET world |
| case MessageSupport.JMS_TYPE_OBJ when IsContentType(SymbolUtil.SERIALIZED_JAVA_OBJECT_CONTENT_TYPE, GetContentType(message.Properties)): |
| return new AmqpNmsBytesMessageFacade(); |
| case MessageSupport.JMS_TYPE_OBJ: |
| return new AmqpNmsObjectMessageFacade(); |
| default: |
| throw new NMSException("Invalid Message Type annotation value found in message: " + annotation); |
| } |
| } |
| |
| return null; |
| } |
| |
| private static AmqpNmsMessageFacade CreateWithoutAnnotation(RestrictedDescribed body, Properties properties) |
| { |
| Symbol contentType = GetContentType(properties); |
| |
| if (body is Data || body is null) |
| { |
| if (IsContentType(SymbolUtil.OCTET_STREAM_CONTENT_TYPE, contentType) || IsContentType(null, contentType)) |
| return new AmqpNmsBytesMessageFacade(); |
| else if (IsContentType(SymbolUtil.SERIALIZED_DOTNET_OBJECT_CONTENT_TYPE, contentType)) |
| return new AmqpNmsObjectMessageFacade(); |
| else |
| { |
| if (IsTextualContent(contentType)) |
| return new AmqpNmsTextMessageFacade(); |
| else |
| return new AmqpNmsBytesMessageFacade(); |
| } |
| } |
| else if (body is AmqpValue amqpValue) |
| { |
| object value = amqpValue.Value; |
| if (value == null || value is string) |
| return new AmqpNmsTextMessageFacade(); |
| else if (value is byte[]) |
| return new AmqpNmsBytesMessageFacade(); |
| else |
| return new AmqpNmsObjectMessageFacade(); |
| } |
| else if (body is AmqpSequence) |
| return new AmqpNmsObjectMessageFacade(); |
| |
| return null; |
| } |
| |
| private static bool IsTextualContent(Symbol contentType) |
| { |
| return contentType != null && contentType.ToString().Equals("text/plain", StringComparison.InvariantCultureIgnoreCase); |
| } |
| |
| private static bool IsContentType(Symbol contentType, Symbol messageContentType) |
| { |
| if (contentType == null) |
| return messageContentType == null; |
| if (messageContentType == null) |
| return false; |
| return contentType.Equals(messageContentType); |
| } |
| |
| private static Symbol GetContentType(Properties properties) |
| { |
| return properties?.ContentType; |
| } |
| |
| public static void EncodeMessage(AmqpNmsMessageFacade messageFacade) |
| { |
| if (messageFacade.Message.MessageAnnotations == null) |
| messageFacade.Message.MessageAnnotations = new MessageAnnotations(); |
| |
| if (messageFacade.JmsMsgType.HasValue) |
| messageFacade.Message.MessageAnnotations[SymbolUtil.JMSX_OPT_MSG_TYPE] = messageFacade.JmsMsgType.Value; |
| |
| AmqpDestinationHelper.SetToAnnotationFromDestination(messageFacade.NMSDestination, messageFacade.Message.MessageAnnotations); |
| AmqpDestinationHelper.SetReplyToAnnotationFromDestination(messageFacade.NMSReplyTo, messageFacade.Message.MessageAnnotations); |
| } |
| } |
| } |