89 lines
3.3 KiB
C#
89 lines
3.3 KiB
C#
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//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Runtime.Serialization.Json
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{
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using System.Xml;
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using System.Security;
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class JsonEnumDataContract : JsonDataContract
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{
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[Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization."
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+ "Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")]
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[SecurityCritical]
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JsonEnumDataContractCriticalHelper helper;
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[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
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Safe = "Doesn't leak anything.")]
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[SecuritySafeCritical]
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public JsonEnumDataContract(EnumDataContract traditionalDataContract)
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: base(new JsonEnumDataContractCriticalHelper(traditionalDataContract))
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{
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this.helper = base.Helper as JsonEnumDataContractCriticalHelper;
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}
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public bool IsULong
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{
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[Fx.Tag.SecurityNote(Critical = "Fetches the critical IsULong property.",
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Safe = "IsULong only needs to be protected for write.")]
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[SecuritySafeCritical]
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get { return this.helper.IsULong; }
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}
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public override object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
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{
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object enumValue;
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if (IsULong)
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{
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enumValue = Enum.ToObject(TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsUnsignedLong());
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}
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else
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{
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enumValue = Enum.ToObject(TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsLong());
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}
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if (context != null)
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{
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context.AddNewObject(enumValue);
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}
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return enumValue;
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}
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public override void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
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{
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if (IsULong)
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{
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jsonWriter.WriteUnsignedLong(((IConvertible)obj).ToUInt64(null));
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}
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else
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{
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jsonWriter.WriteLong(((IConvertible)obj).ToInt64(null));
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}
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}
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[Fx.Tag.SecurityNote(Critical = "Holds all state used for (de)serializing types."
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+ "Since the data is cached statically, we lock down access to it.")]
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#if !NO_SECURITY_ATTRIBUTES
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#pragma warning disable 618 // have not moved to the v4 security model yet
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[SecurityCritical(SecurityCriticalScope.Everything)]
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#pragma warning restore 618
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#endif
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class JsonEnumDataContractCriticalHelper : JsonDataContractCriticalHelper
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{
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bool isULong;
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public JsonEnumDataContractCriticalHelper(EnumDataContract traditionalEnumDataContract)
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: base(traditionalEnumDataContract)
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{
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isULong = traditionalEnumDataContract.IsULong;
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}
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public bool IsULong
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{
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get { return this.isULong; }
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}
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}
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}
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}
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