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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization
{
using System;
using System.Collections.Generic;
using System.Security;
sealed class GenericParameterDataContract : DataContract
{
[Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization."
+ " Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")]
[SecurityCritical]
GenericParameterDataContractCriticalHelper helper;
[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
Safe = "Doesn't leak anything.")]
[SecuritySafeCritical]
internal GenericParameterDataContract(Type type)
: base(new GenericParameterDataContractCriticalHelper(type))
{
helper = base.Helper as GenericParameterDataContractCriticalHelper;
}
internal int ParameterPosition
{
[Fx.Tag.SecurityNote(Critical = "Fetches the critical ParameterPosition property.",
Safe = "ParameterPosition only needs to be protected for write.")]
[SecuritySafeCritical]
get { return helper.ParameterPosition; }
}
internal override bool IsBuiltInDataContract
{
get
{
return true;
}
}
[Fx.Tag.SecurityNote(Critical = "Holds state used for deaing with generic parameters."
+ " Since the data is cached statically, we lock down access to it.")]
#if !NO_SECURITY_ATTRIBUTES
[SecurityCritical(SecurityCriticalScope.Everything)]
#endif
class GenericParameterDataContractCriticalHelper : DataContract.DataContractCriticalHelper
{
int parameterPosition;
internal GenericParameterDataContractCriticalHelper(Type type)
: base(type)
{
SetDataContractName(DataContract.GetStableName(type));
this.parameterPosition = type.GenericParameterPosition;
}
internal int ParameterPosition
{
get { return parameterPosition; }
}
}
internal override DataContract BindGenericParameters(DataContract[] paramContracts, Dictionary<DataContract, DataContract> boundContracts)
{
return paramContracts[ParameterPosition];
}
}
}
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