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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.CodeDom;
using System.Xml;
static class SecurityAttributeGenerationHelper
{
public static CodeAttributeDeclaration FindOrCreateAttributeDeclaration<T>(CodeAttributeDeclarationCollection attributes)
where T : Attribute
{
if (attributes == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attributes");
CodeTypeReference refT = new CodeTypeReference(typeof(T));
foreach (CodeAttributeDeclaration attribute in attributes)
if (attribute.AttributeType.BaseType == refT.BaseType)
return attribute;
CodeAttributeDeclaration result = new CodeAttributeDeclaration(refT);
attributes.Add(result);
return result;
}
public static void CreateOrOverridePropertyDeclaration<V>(CodeAttributeDeclaration attribute, string propertyName, V value)
{
if (attribute == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attribute");
if (propertyName == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("propertyName");
CodeExpression newValue;
if (value is TimeSpan)
newValue = new CodeObjectCreateExpression(
typeof(TimeSpan),
new CodePrimitiveExpression(((TimeSpan)(object)value).Ticks));
else if (value is Enum)
newValue = new CodeFieldReferenceExpression(
new CodeTypeReferenceExpression(typeof(V)),
((object)value).ToString());
else
newValue = new CodePrimitiveExpression((object)value);
CodeAttributeArgument attributeProperty = TryGetAttributeProperty(attribute, propertyName);
if (attributeProperty == null)
{
attributeProperty = new CodeAttributeArgument(propertyName, newValue);
attribute.Arguments.Add(attributeProperty);
}
else
attributeProperty.Value = newValue;
}
public static CodeAttributeArgument TryGetAttributeProperty(CodeAttributeDeclaration attribute, string propertyName)
{
if (attribute == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("attribute");
if (propertyName == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("propertyName");
foreach (CodeAttributeArgument argument in attribute.Arguments)
if (argument.Name == propertyName)
return argument;
return null;
}
}
}
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