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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.ServiceModel.Activities
{
using System.Activities;
using System.Collections.ObjectModel;
using System.Runtime;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
class ToRequest : CodeActivity
{
MessageVersion messageVersion;
Collection<InArgument> parameters;
public ToRequest()
{
}
public Send Send
{
get;
set;
}
public IClientMessageFormatter Formatter
{
get;
set;
}
public Collection<InArgument> Parameters
{
get
{
if (this.parameters == null)
{
this.parameters = new Collection<InArgument>();
}
return this.parameters;
}
}
public OutArgument<Message> Message
{
get;
set;
}
internal MessageVersion MessageVersion
{
get
{
if (this.messageVersion == null)
{
this.messageVersion = this.Send.GetMessageVersion();
}
return this.messageVersion;
}
}
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
if (this.parameters != null)
{
int count = 0;
foreach (InArgument parameter in this.parameters)
{
RuntimeArgument parameterArgument = new RuntimeArgument(Constants.Parameter + count++, parameter.ArgumentType, ArgumentDirection.In);
metadata.Bind(parameter, parameterArgument);
metadata.AddArgument(parameterArgument);
}
}
RuntimeArgument messageArgument = new RuntimeArgument(Constants.Message, Constants.MessageType, ArgumentDirection.Out, true);
metadata.Bind(this.Message, messageArgument);
metadata.AddArgument(messageArgument);
Fx.Assert(this.Send != null, "Send cannot be null");
}
protected override void Execute(CodeActivityContext context)
{
object[] inObjects;
if (this.parameters == null || this.parameters.Count == 0)
{
inObjects = Constants.EmptyArray;
}
else
{
inObjects = new object[this.parameters.Count];
for (int i = 0; i < this.parameters.Count; i++)
{
Fx.Assert(this.parameters[i] != null, "Parameter should not be null");
inObjects[i] = this.parameters[i].Get(context);
}
}
// Formatter is cached since it is fixed for each definition of Send
if (this.Formatter == null)
{
OperationDescription operation = ContractInferenceHelper.CreateOneWayOperationDescription(this.Send);
this.Formatter = ClientOperationFormatterProvider.GetFormatterFromRuntime(operation);
this.Send.OperationDescription = operation;
}
// Send.ChannelCacheEnabled must be set before we call this.MessageVersion
// because this.MessageVersion will cache description and description resolution depends on the value of ChannelCacheEnabled
this.Send.InitializeChannelCacheEnabledSetting(context);
// MessageVersion is cached for perf reasons since it is fixed for each definition of Send
Message outMessage = this.Formatter.SerializeRequest(this.MessageVersion, inObjects);
this.Message.Set(context, outMessage);
}
}
}
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