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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Activities
{
using System.Activities;
using System.Activities.Validation;
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<Message>(context => ((OutArgument<Message>)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<Message>(context => ((OutArgument<Message>)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);
}
}
internal override void ValidateContract(NativeActivityContext context, OperationDescription targetOperation, object owner, MessageDirection direction)
{
MessageDescription targetMessage;
string overridingAction;
bool isResponse;
SerializerOption serializerOption;
if (direction == MessageDirection.Input)
{
Fx.Assert(targetOperation.Messages.Count >= 1, "There must be at least one MessageDescription in an OperationDescription!");
targetMessage = targetOperation.Messages[0];
Receive receive = owner as Receive;
Fx.Assert(receive != null, "The parent of a ReceiveMessageContent with in-message can only be Receive!");
overridingAction = receive.Action;
serializerOption = receive.SerializerOption;
isResponse = false;
}
else
{
Fx.Assert(targetOperation.Messages.Count == 2, "There must be exactly two MessageDescription objects for a two-way operation!");
targetMessage = targetOperation.Messages[1];
ReceiveReply receiveReply = owner as ReceiveReply;
Fx.Assert(receiveReply != null, "The parent of a ReceiveMessageContent with out-message can only be ReceiveReply!");
Fx.Assert(receiveReply.Request != null, "ReceiveReply.Request should not be null by now!");
overridingAction = receiveReply.Action;
serializerOption = receiveReply.Request.SerializerOption;
isResponse = true;
}
ContractValidationHelper.ValidateAction(context, targetMessage, overridingAction, targetOperation, isResponse);
if (ContractValidationHelper.IsReceiveParameterContent(targetOperation))
{
Constraint.AddValidationError(context, new ValidationError(SR.MisuseOfMessageContent(targetOperation.Name, targetOperation.DeclaringContract.Name)));
}
else
{
ContractValidationHelper.ValidateMessageContent(context, targetMessage, this.InternalDeclaredMessageType,
serializerOption, targetOperation, isResponse);
}
}
}
}
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