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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.Collections.Generic;
using System.Runtime;
public class CorrelationDataMessageProperty : IMessageProperty
{
const string PropertyName = "CorrelationDataMessageProperty";
Dictionary<string, DataProviderEntry> dataProviders;
public CorrelationDataMessageProperty()
{
}
CorrelationDataMessageProperty(IDictionary<string, DataProviderEntry> dataProviders)
{
if (dataProviders != null && dataProviders.Count > 0)
{
this.dataProviders = new Dictionary<string, DataProviderEntry>(dataProviders);
}
}
public static string Name
{
get { return PropertyName; }
}
public void Add(string name, Func<string> dataProvider)
{
if (string.IsNullOrEmpty(name))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("name");
}
if (dataProvider == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("dataProvider");
}
if (this.dataProviders == null)
{
this.dataProviders = new Dictionary<string, DataProviderEntry>();
}
this.dataProviders.Add(name, new DataProviderEntry(dataProvider));
}
public bool Remove(string name)
{
if (this.dataProviders != null)
{
return this.dataProviders.Remove(name);
}
else
{
return false;
}
}
public bool TryGetValue(string name, out string value)
{
DataProviderEntry entry;
if (this.dataProviders != null && this.dataProviders.TryGetValue(name, out entry))
{
value = entry.Data;
return true;
}
else
{
value = null;
return false;
}
}
public static bool TryGet(Message message, out CorrelationDataMessageProperty property)
{
if (message == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("message");
}
return TryGet(message.Properties, out property);
}
public static bool TryGet(MessageProperties properties, out CorrelationDataMessageProperty property)
{
object value = null;
if (properties.TryGetValue(PropertyName, out value))
{
property = value as CorrelationDataMessageProperty;
}
else
{
property = null;
}
return property != null;
}
public static void AddData(Message message, string name, Func<string> dataProvider)
{
if (string.IsNullOrEmpty(name))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("name");
}
if (dataProvider == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("dataProvider");
}
CorrelationDataMessageProperty data = null;
object value = null;
if (message.Properties.TryGetValue(PropertyName, out value))
{
data = value as CorrelationDataMessageProperty;
}
bool addNewProperty = false;
if (data == null)
{
data = new CorrelationDataMessageProperty();
addNewProperty = true;
}
data.Add(name, dataProvider);
if (addNewProperty)
{
message.Properties[PropertyName] = data;
}
}
public IMessageProperty CreateCopy()
{
return new CorrelationDataMessageProperty(this.dataProviders);
}
class DataProviderEntry
{
string resolvedData;
Func<string> dataProvider;
public DataProviderEntry(Func<string> dataProvider)
{
Fx.Assert(dataProvider != null, "dataProvider required");
this.dataProvider = dataProvider;
this.resolvedData = null;
}
public string Data
{
get
{
if (this.dataProvider != null)
{
this.resolvedData = this.dataProvider();
this.dataProvider = null;
}
return this.resolvedData;
}
}
}
}
}
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