ReceiveMessageContent.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.ServiceModel.Activities / System / ServiceModel / Activities / ReceiveMessageContent.cs / 1305376 / ReceiveMessageContent.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Activities 
{
    using System.Activities; 
    using System.ComponentModel; 
    using System.Runtime;
    using System.ServiceModel.Channels; 
    using System.ServiceModel.Description;
    using System.Windows.Markup;

    [ContentProperty("Message")] 
    public sealed class ReceiveMessageContent : ReceiveContent
    { 
        public ReceiveMessageContent() 
            : base()
        { 
        }

        public ReceiveMessageContent(OutArgument message)
            : this() 
        {
            this.Message = message; 
        } 

        public ReceiveMessageContent(OutArgument message, Type declaredMessageType) 
            : this(message)
        {
            this.DeclaredMessageType = declaredMessageType;
        } 

        // The value that is received as the body of the message. 
        // The type is derived from Message.Expression.ResultType. If the optional 
        // DeclaredMessageType property is also specified, it is validated against
        // Message.Expression.ResultType. 
        [DefaultValue(null)]
        public OutArgument Message
        {
            get; 
            set;
        } 
 
        // Allows the type of the variable specified for Message to be a derived type from the type
        // on the message contract. This type specifies what the type is one the message contract. 
        // If DeclaredMessageType is not specified, the type from the Message OutArgument is used.
        // The DeclaredMessageType must either be the same as the type of the OutArgument Message,
        // or it must be a base type of Message.
        [DefaultValue(null)] 
        public Type DeclaredMessageType
        { 
            get; 
            set;
        } 

        internal Type InternalDeclaredMessageType
        {
            get 
            {
                if (this.DeclaredMessageType == null && this.Message != null) 
                { 
                    return this.Message.ArgumentType;
                } 
                else
                {
                    return this.DeclaredMessageType;
                } 
            }
        } 
 
        [EditorBrowsable(EditorBrowsableState.Never)]
        public bool ShouldSerializeDeclaredMessageType() 
        {
            // don't serialize null
            if (this.DeclaredMessageType == null)
            { 
                return false;
            } 
 
            // if the expression type of Message matches the declared message type, no need to serialize duplicative information
            if (this.Message != null && this.DeclaredMessageType == this.Message.ArgumentType) 
            {
                return false;
            }
 
            return true;
        } 
 
        internal override void CacheMetadata(ActivityMetadata metadata, Activity owner, string operationName)
        { 
            MessagingActivityHelper.FixMessageArgument(this.Message, ArgumentDirection.Out, metadata);

            if (this.DeclaredMessageType != null)
            { 
                if (this.Message == null && this.DeclaredMessageType != TypeHelper.VoidType)
                { 
                    string errorOperationName = ContractValidationHelper.GetErrorMessageOperationName(operationName); 
                    metadata.AddValidationError(SR.ValueCannotBeNull(owner.DisplayName, errorOperationName));
                } 
                else if (this.Message != null && !this.DeclaredMessageType.IsAssignableFrom(this.Message.ArgumentType))
                {
                    string errorOperationName = ContractValidationHelper.GetErrorMessageOperationName(operationName);
                    metadata.AddValidationError(SR.ValueArgumentTypeNotDerivedFromValueType(owner.DisplayName, errorOperationName)); 
                }
            } 
        } 

        internal override void ConfigureInternalReceive(InternalReceiveMessage internalReceiveMessage, out FromRequest requestFormatter) 
        {
            if (this.InternalDeclaredMessageType == MessageDescription.TypeOfUntypedMessage)
            {
                internalReceiveMessage.Message = new OutArgument(context => ((OutArgument)this.Message).Get(context)); 
                requestFormatter = null;
            } 
            else 
            {
                requestFormatter = new FromRequest(); 
                if (this.Message != null)
                {
                    requestFormatter.Parameters.Add(OutArgument.CreateReference(this.Message, "Message"));
                } 
            }
        } 
 
        internal override void ConfigureInternalReceiveReply(InternalReceiveMessage internalReceiveMessage, out FromReply responseFormatter)
        { 
            if (this.InternalDeclaredMessageType == MessageDescription.TypeOfUntypedMessage)
            {
                // do not use the formatter in this case
                internalReceiveMessage.Message = new OutArgument(context => ((OutArgument)this.Message).Get(context)); 
                responseFormatter = null;
            } 
            else 
            {
                responseFormatter = new FromReply(); 

                // WCF rule dictates that MessageContract must be bound to ReturnValue, not Parameters
                if (MessageBuilder.IsMessageContract(this.InternalDeclaredMessageType))
                { 
                    responseFormatter.Result = OutArgument.CreateReference(this.Message, "Message");
                } 
                else if (this.Message != null) 
                {
                    responseFormatter.Parameters.Add(OutArgument.CreateReference(this.Message, "Message")); 
                }
            }
        }
 
        internal override void InferMessageDescription(OperationDescription operation, object owner, MessageDirection direction)
        { 
            ContractInferenceHelper.CheckForDisposableParameters(operation, this.InternalDeclaredMessageType); 

            string overridingAction = null; 
            SerializerOption serializerOption = SerializerOption.DataContractSerializer;
            Receive receive = owner as Receive;
            if (receive != null)
            { 
                overridingAction = receive.Action;
                serializerOption = receive.SerializerOption; 
            } 
            else
            { 
                ReceiveReply receiveReply = owner as ReceiveReply;
                Fx.Assert(receiveReply != null, "The owner of ReceiveMessageContent can only be Receive or ReceiveReply!");
                overridingAction = receiveReply.Action;
                serializerOption = receiveReply.Request.SerializerOption; 
            }
 
            if (direction == MessageDirection.Input) 
            {
                ContractInferenceHelper.AddInputMessage(operation, overridingAction, this.InternalDeclaredMessageType, serializerOption); 
            }
            else
            {
                ContractInferenceHelper.AddOutputMessage(operation, overridingAction, this.InternalDeclaredMessageType, serializerOption); 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ReceiveMessageContent.cs source code in C# .NET

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