BinaryMessageFormatter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Messaging / System / Messaging / BinaryMessageFormatter.cs / 1305376 / BinaryMessageFormatter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Messaging { 
    using System; 
    using System.Runtime.Serialization;
    using System.Runtime.Serialization.Formatters; 
    using System.Runtime.Serialization.Formatters.Binary;
    using System.Diagnostics;
    using System.IO;
    using System.ComponentModel; 

    ///  
    ///  
    ///    Formatter class that serializes and deserializes objects into
    ///    and from  MessageQueue messages using binary format. 
    /// 
    public class BinaryMessageFormatter : IMessageFormatter {
        private BinaryFormatter formatter;
        internal const short VT_BINARY_OBJECT = 0x300; 

        ///  
        ///  
        ///    Creates a new Binary message formatter object.
        ///  
        public BinaryMessageFormatter() {
            this.formatter = new BinaryFormatter();
        }
 
        /// 
        ///  
        ///    Creates a new Binary message formatter object 
        ///    with the given properties.
        ///  
        public BinaryMessageFormatter(FormatterAssemblyStyle topObjectFormat, FormatterTypeStyle typeFormat) {
            this.formatter = new BinaryFormatter();
            this.formatter.AssemblyFormat = topObjectFormat;
            this.formatter.TypeFormat = typeFormat; 
        }
 
        ///  
        /// 
        ///    Determines how the top (root) object of a graph 
        ///    is laid out in the serialized stream.
        /// 
        [MessagingDescription(Res.MsgTopObjectFormat), DefaultValueAttribute(FormatterAssemblyStyle.Simple)]
        public FormatterAssemblyStyle TopObjectFormat { 
            get {
                return this.formatter.AssemblyFormat; 
            } 

            set { 
                this.formatter.AssemblyFormat = value;
            }
        }
 
        /// 
        ///  
        ///    Determines how type descriptions are laid out in the 
        ///    serialized stream.
        ///  
        [MessagingDescription(Res.MsgTypeFormat), DefaultValueAttribute(FormatterTypeStyle.TypesWhenNeeded)]
        public FormatterTypeStyle TypeFormat {
            get {
                return this.formatter.TypeFormat; 
            }
 
            set { 
                this.formatter.TypeFormat = value;
            } 
        }

        /// 
        ///  
        ///    When this method is called, the formatter will attempt to determine
        ///       if the contents of the message are something the formatter can deal with. 
        ///  
        public bool CanRead(Message message) {
            if (message == null) 
                throw new ArgumentNullException("message");

            int variantType = message.BodyType;
            if (variantType != VT_BINARY_OBJECT) 
                return false;
 
            return true; 
        }
 
        /// 
        /// 
        ///    This method is needed to improve scalability on Receive and ReceiveAsync scenarios.  Not requiring
        ///     thread safety on read and write. 
        /// 
        public object Clone() { 
            return new BinaryMessageFormatter(TopObjectFormat, TypeFormat); 
        }
 
        /// 
        /// 
        ///    This method is used to read the contents from the given message
        ///     and create an object. 
        /// 
        public object Read(Message message) { 
            if (message == null) 
                throw new ArgumentNullException("message");
 
            int variantType = message.BodyType;
            if (variantType == VT_BINARY_OBJECT) {
                Stream stream = message.BodyStream;
                return formatter.Deserialize(stream); 
            }
 
            throw new InvalidOperationException(Res.GetString(Res.InvalidTypeDeserialization)); 
        }
 
        /// 
        /// 
        ///    This method is used to write the given object into the given message.
        ///     If the formatter cannot understand the given object, an exception is thrown. 
        /// 
        public void Write(Message message, object obj) { 
            if (message == null) 
                throw new ArgumentNullException("message");
 
            Stream stream = new MemoryStream();
            formatter.Serialize(stream, obj);
            message.BodyType = VT_BINARY_OBJECT;
            message.BodyStream = stream; 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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