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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.Runtime.Serialization.Json
{
using System.Threading;
using System.Xml;
using System.Security;
class JsonCollectionDataContract : JsonDataContract
{
[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]
JsonCollectionDataContractCriticalHelper helper;
[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
Safe = "Doesn't leak anything.")]
[SecuritySafeCritical]
public JsonCollectionDataContract(CollectionDataContract traditionalDataContract)
: base(new JsonCollectionDataContractCriticalHelper(traditionalDataContract))
{
this.helper = base.Helper as JsonCollectionDataContractCriticalHelper;
}
internal JsonFormatCollectionReaderDelegate JsonFormatReaderDelegate
{
[Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatReaderDelegate property.",
Safe = "JsonFormatReaderDelegate only needs to be protected for write.")]
[SecuritySafeCritical]
get
{
if (helper.JsonFormatReaderDelegate == null)
{
lock (this)
{
if (helper.JsonFormatReaderDelegate == null)
{
if (TraditionalCollectionDataContract.IsReadOnlyContract)
{
DataContract.ThrowInvalidDataContractException(TraditionalCollectionDataContract.DeserializationExceptionMessage, null /*type*/);
}
JsonFormatCollectionReaderDelegate tempDelegate = new JsonFormatReaderGenerator().GenerateCollectionReader(TraditionalCollectionDataContract);
Thread.MemoryBarrier();
helper.JsonFormatReaderDelegate = tempDelegate;
}
}
}
return helper.JsonFormatReaderDelegate;
}
}
internal JsonFormatGetOnlyCollectionReaderDelegate JsonFormatGetOnlyReaderDelegate
{
[Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatGetOnlyReaderDelegate property.",
Safe = "JsonFormatGetOnlyReaderDelegate only needs to be protected for write; initialized in getter if null.")]
[SecuritySafeCritical]
get
{
if (helper.JsonFormatGetOnlyReaderDelegate == null)
{
lock (this)
{
if (helper.JsonFormatGetOnlyReaderDelegate == null)
{
CollectionKind kind = this.TraditionalCollectionDataContract.Kind;
if (this.TraditionalDataContract.UnderlyingType.IsInterface && (kind == CollectionKind.Enumerable || kind == CollectionKind.Collection || kind == CollectionKind.GenericEnumerable))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.GetOnlyCollectionMustHaveAddMethod, DataContract.GetClrTypeFullName(this.TraditionalDataContract.UnderlyingType))));
}
if (TraditionalCollectionDataContract.IsReadOnlyContract)
{
DataContract.ThrowInvalidDataContractException(TraditionalCollectionDataContract.DeserializationExceptionMessage, null /*type*/);
}
JsonFormatGetOnlyCollectionReaderDelegate tempDelegate = new JsonFormatReaderGenerator().GenerateGetOnlyCollectionReader(TraditionalCollectionDataContract);
Thread.MemoryBarrier();
helper.JsonFormatGetOnlyReaderDelegate = tempDelegate;
}
}
}
return helper.JsonFormatGetOnlyReaderDelegate;
}
}
internal JsonFormatCollectionWriterDelegate JsonFormatWriterDelegate
{
[Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatWriterDelegate property.",
Safe = "JsonFormatWriterDelegate only needs to be protected for write.")]
[SecuritySafeCritical]
get
{
if (helper.JsonFormatWriterDelegate == null)
{
lock (this)
{
if (helper.JsonFormatWriterDelegate == null)
{
JsonFormatCollectionWriterDelegate tempDelegate = new JsonFormatWriterGenerator().GenerateCollectionWriter(TraditionalCollectionDataContract);
Thread.MemoryBarrier();
helper.JsonFormatWriterDelegate = tempDelegate;
}
}
}
return helper.JsonFormatWriterDelegate;
}
}
CollectionDataContract TraditionalCollectionDataContract
{
[Fx.Tag.SecurityNote(Critical = "Fetches the critical TraditionalCollectionDataContract property.",
Safe = "TraditionalCollectionDataContract only needs to be protected for write.")]
[SecuritySafeCritical]
get { return this.helper.TraditionalCollectionDataContract; }
}
public override object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
{
jsonReader.Read();
object o = null;
if (context.IsGetOnlyCollection)
{
// IsGetOnlyCollection value has already been used to create current collectiondatacontract, value can now be reset.
context.IsGetOnlyCollection = false;
JsonFormatGetOnlyReaderDelegate(jsonReader, context, XmlDictionaryString.Empty, JsonGlobals.itemDictionaryString, TraditionalCollectionDataContract);
}
else
{
o = JsonFormatReaderDelegate(jsonReader, context, XmlDictionaryString.Empty, JsonGlobals.itemDictionaryString, TraditionalCollectionDataContract);
}
jsonReader.ReadEndElement();
return o;
}
public override void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
{
// IsGetOnlyCollection value has already been used to create current collectiondatacontract, value can now be reset.
context.IsGetOnlyCollection = false;
JsonFormatWriterDelegate(jsonWriter, obj, context, TraditionalCollectionDataContract);
}
[Fx.Tag.SecurityNote(Critical = "Holds all state used for (de)serializing types."
+ "Since the data is cached statically, we lock down access to it.")]
#if !NO_SECURITY_ATTRIBUTES
#pragma warning disable 618 // have not moved to the v4 security model yet
[SecurityCritical(SecurityCriticalScope.Everything)]
#pragma warning restore 618
#endif
class JsonCollectionDataContractCriticalHelper : JsonDataContractCriticalHelper
{
JsonFormatCollectionReaderDelegate jsonFormatReaderDelegate;
JsonFormatGetOnlyCollectionReaderDelegate jsonFormatGetOnlyReaderDelegate;
JsonFormatCollectionWriterDelegate jsonFormatWriterDelegate;
CollectionDataContract traditionalCollectionDataContract;
public JsonCollectionDataContractCriticalHelper(CollectionDataContract traditionalDataContract)
: base(traditionalDataContract)
{
this.traditionalCollectionDataContract = traditionalDataContract;
}
internal JsonFormatCollectionReaderDelegate JsonFormatReaderDelegate
{
get { return this.jsonFormatReaderDelegate; }
set { this.jsonFormatReaderDelegate = value; }
}
internal JsonFormatGetOnlyCollectionReaderDelegate JsonFormatGetOnlyReaderDelegate
{
get { return this.jsonFormatGetOnlyReaderDelegate; }
set { this.jsonFormatGetOnlyReaderDelegate = value; }
}
internal JsonFormatCollectionWriterDelegate JsonFormatWriterDelegate
{
get { return this.jsonFormatWriterDelegate; }
set { this.jsonFormatWriterDelegate = value; }
}
internal CollectionDataContract TraditionalCollectionDataContract
{
get { return this.traditionalCollectionDataContract; }
}
}
}
}
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