Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / NetFx35 / System.ServiceModel.Web / System / Runtime / Serialization / Json / JsonFormatWriterGenerator.cs / 2 / JsonFormatWriterGenerator.cs
namespace System.Runtime.Serialization.Json
{
using System;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.Xml;
using System.Security;
using System.Security.Permissions;
using System.ServiceModel.Description;
internal delegate void JsonFormatClassWriterDelegate(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, ClassDataContract dataContract, XmlDictionaryString[] memberNames);
internal delegate void JsonFormatCollectionWriterDelegate(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, CollectionDataContract dataContract);
class JsonFormatWriterGenerator
{
//
// Critical - holds instance of CriticalHelper which keeps state that was produced within an assert
//
[SecurityCritical]
CriticalHelper helper;
//
// Critical - initializes SecurityCritical field 'helper'
//
[SecurityCritical]
public JsonFormatWriterGenerator()
{
helper = new CriticalHelper();
}
//
// Critical - accesses SecurityCritical helper class 'CriticalHelper'
//
[SecurityCritical]
internal JsonFormatClassWriterDelegate GenerateClassWriter(ClassDataContract classContract)
{
return helper.GenerateClassWriter(classContract);
}
//
// Critical - accesses SecurityCritical helper class 'CriticalHelper'
//
[SecurityCritical]
internal JsonFormatCollectionWriterDelegate GenerateCollectionWriter(CollectionDataContract collectionContract)
{
return helper.GenerateCollectionWriter(collectionContract);
}
///
/// Review - handles all aspects of IL generation including initializing the DynamicMethod.
/// changes to how IL generated could affect how data is deserialized and what gets access to data,
/// therefore we mark it for review so that changes to generation logic are reviewed.
///
[SecurityRequiresReview(SecurityCriticalScope.Everything)]
class CriticalHelper
{
CodeGenerator ilg;
ArgBuilder xmlWriterArg;
ArgBuilder contextArg;
ArgBuilder dataContractArg;
LocalBuilder objectLocal;
// Used for classes
ArgBuilder memberNamesArg;
int typeIndex = 1;
int childElementIndex = 0;
internal JsonFormatClassWriterDelegate GenerateClassWriter(ClassDataContract classContract)
{
ilg = new CodeGenerator();
bool memberAccessFlag = classContract.RequiresMemberAccessForWrite(null) && RequiresJsonMemberAccessForWrite(classContract.UnderlyingType);
try
{
BeginMethod(ilg, "Write" + classContract.StableName.Name + "ToJson", typeof(JsonFormatClassWriterDelegate), memberAccessFlag);
}
catch (SecurityException securityException)
{
if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
{
classContract.RequiresMemberAccessForWrite(securityException);
}
else
{
throw;
}
}
InitArgs(classContract.UnderlyingType);
memberNamesArg = ilg.GetArg(4);
DemandSerializationFormatterPermission(classContract);
DemandMemberAccessPermission(memberAccessFlag);
WriteClass(classContract);
return (JsonFormatClassWriterDelegate)ilg.EndMethod();
}
static bool RequiresJsonMemberAccessForWrite(Type underlyingType)
{
return !JsonDataContract.IsTypeVisibleInJsonSerializationModule(underlyingType);
}
internal JsonFormatCollectionWriterDelegate GenerateCollectionWriter(CollectionDataContract collectionContract)
{
ilg = new CodeGenerator();
bool memberAccessFlag = collectionContract.RequiresMemberAccessForWrite(null);
try
{
BeginMethod(ilg, "Write" + collectionContract.StableName.Name + "ToJson", typeof(JsonFormatCollectionWriterDelegate), memberAccessFlag);
}
catch (SecurityException securityException)
{
if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
{
collectionContract.RequiresMemberAccessForWrite(securityException);
}
else
{
throw;
}
}
InitArgs(collectionContract.UnderlyingType);
DemandMemberAccessPermission(memberAccessFlag);
WriteCollection(collectionContract);
return (JsonFormatCollectionWriterDelegate)ilg.EndMethod();
}
void BeginMethod(CodeGenerator ilg, string methodName, Type delegateType, bool allowPrivateMemberAccess)
{
#if USE_REFEMIT
ilg.BeginMethod(methodName, delegateType, allowPrivateMemberAccess);
#else
MethodInfo signature = delegateType.GetMethod("Invoke");
ParameterInfo[] parameters = signature.GetParameters();
Type[] paramTypes = new Type[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
paramTypes[i] = parameters[i].ParameterType;
DynamicMethod dynamicMethod = new DynamicMethod(methodName, signature.ReturnType, paramTypes, typeof(JsonFormatWriterGenerator).Module, allowPrivateMemberAccess);
ilg.BeginMethod(dynamicMethod, delegateType, methodName, paramTypes, allowPrivateMemberAccess);
#endif
}
void InitArgs(Type objType)
{
xmlWriterArg = ilg.GetArg(0);
contextArg = ilg.GetArg(2);
dataContractArg = ilg.GetArg(3);
objectLocal = ilg.DeclareLocal(objType, "objSerialized");
ArgBuilder objectArg = ilg.GetArg(1);
ilg.Load(objectArg);
// Copy the data from the DataTimeOffset object passed in to the DateTimeOffsetAdapter.
// DateTimeOffsetAdapter is used here for serialization purposes to bypass the ISerializable implementation
// on DateTimeOffset; which does not work in partial trust.
if (objType == Globals.TypeOfDateTimeOffsetAdapter)
{
ilg.ConvertValue(objectArg.ArgType, Globals.TypeOfDateTimeOffset);
ilg.Call(XmlFormatGeneratorStatics.GetDateTimeOffsetAdapterMethod);
}
else
{
ilg.ConvertValue(objectArg.ArgType, objType);
}
ilg.Stloc(objectLocal);
}
void DemandMemberAccessPermission(bool memberAccessFlag)
{
if (memberAccessFlag)
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.DemandMemberAccessPermissionMethod);
}
}
void DemandSerializationFormatterPermission(ClassDataContract classContract)
{
if (!classContract.HasDataContract && !classContract.IsNonAttributedType)
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.DemandSerializationFormatterPermissionMethod);
}
}
void InvokeOnSerializing(ClassDataContract classContract)
{
if (classContract.BaseContract != null)
InvokeOnSerializing(classContract.BaseContract);
if (classContract.OnSerializing != null)
{
ilg.LoadAddress(objectLocal);
ilg.Load(contextArg);
ilg.Call(XmlFormatGeneratorStatics.GetStreamingContextMethod);
ilg.Call(classContract.OnSerializing);
}
}
void InvokeOnSerialized(ClassDataContract classContract)
{
if (classContract.BaseContract != null)
InvokeOnSerialized(classContract.BaseContract);
if (classContract.OnSerialized != null)
{
ilg.LoadAddress(objectLocal);
ilg.Load(contextArg);
ilg.Call(XmlFormatGeneratorStatics.GetStreamingContextMethod);
ilg.Call(classContract.OnSerialized);
}
}
void WriteClass(ClassDataContract classContract)
{
InvokeOnSerializing(classContract);
if (classContract.IsISerializable)
{
ilg.Call(contextArg, JsonFormatGeneratorStatics.WriteJsonISerializableMethod, xmlWriterArg, objectLocal);
}
else
{
if (classContract.HasExtensionData)
{
LocalBuilder extensionDataLocal = ilg.DeclareLocal(Globals.TypeOfExtensionDataObject, "extensionData");
ilg.Load(objectLocal);
ilg.ConvertValue(objectLocal.LocalType, Globals.TypeOfIExtensibleDataObject);
ilg.LoadMember(JsonFormatGeneratorStatics.ExtensionDataProperty);
ilg.Store(extensionDataLocal);
ilg.Call(contextArg, XmlFormatGeneratorStatics.WriteExtensionDataMethod, xmlWriterArg, extensionDataLocal, -1);
WriteMembers(classContract, extensionDataLocal, classContract);
}
else
WriteMembers(classContract, null, classContract);
}
InvokeOnSerialized(classContract);
}
int WriteMembers(ClassDataContract classContract, LocalBuilder extensionDataLocal, ClassDataContract derivedMostClassContract)
{
int memberCount = (classContract.BaseContract == null) ? 0 :
WriteMembers(classContract.BaseContract, extensionDataLocal, derivedMostClassContract);
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, classContract.Members.Count);
for (int i = 0; i < classContract.Members.Count; i++, memberCount++)
{
DataMember member = classContract.Members[i];
Type memberType = member.MemberType;
LocalBuilder memberValue = null;
if (member.IsGetOnlyCollection)
{
ilg.Load(contextArg);
ilg.Call(XmlFormatGeneratorStatics.StoreIsGetOnlyCollectionMethod);
}
if (!member.EmitDefaultValue)
{
memberValue = LoadMemberValue(member);
ilg.IfNotDefaultValue(memberValue);
}
bool requiresNameAttribute = DataContractJsonSerializer.CheckIfXmlNameRequiresMapping(classContract.MemberNames[i]);
if (requiresNameAttribute || !TryWritePrimitive(memberType, memberValue, member.MemberInfo, null /*arrayItemIndex*/, null /*nameLocal*/, i + childElementIndex))
{
// Note: DataContractSerializer has member-conflict logic here to deal with the schema export
// requirement that the same member can't be of two different types.
if (requiresNameAttribute)
{
ilg.Call(null, JsonFormatGeneratorStatics.WriteJsonNameWithMappingMethod, xmlWriterArg, memberNamesArg, i + childElementIndex);
}
else
{
WriteStartElement(null /*nameLocal*/, i + childElementIndex);
}
if (memberValue == null)
memberValue = LoadMemberValue(member);
WriteValue(memberValue);
WriteEndElement();
}
if (classContract.HasExtensionData)
ilg.Call(contextArg, XmlFormatGeneratorStatics.WriteExtensionDataMethod, xmlWriterArg, extensionDataLocal, memberCount);
if (!member.EmitDefaultValue)
{
if (member.IsRequired)
{
ilg.Else();
ilg.Call(null, XmlFormatGeneratorStatics.ThrowRequiredMemberMustBeEmittedMethod, member.Name, classContract.UnderlyingType);
}
ilg.EndIf();
}
}
typeIndex++;
childElementIndex += classContract.Members.Count;
return memberCount;
}
private LocalBuilder LoadMemberValue(DataMember member)
{
ilg.LoadAddress(objectLocal);
ilg.LoadMember(member.MemberInfo);
LocalBuilder memberValue = ilg.DeclareLocal(member.MemberType, member.Name + "Value");
ilg.Stloc(memberValue);
return memberValue;
}
void WriteCollection(CollectionDataContract collectionContract)
{
LocalBuilder itemName = ilg.DeclareLocal(typeof(XmlDictionaryString), "itemName");
ilg.Load(contextArg);
ilg.LoadMember(JsonFormatGeneratorStatics.CollectionItemNameProperty);
ilg.Store(itemName);
if (collectionContract.Kind == CollectionKind.Array)
{
Type itemType = collectionContract.ItemType;
LocalBuilder i = ilg.DeclareLocal(Globals.TypeOfInt, "i");
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementArrayCountMethod, xmlWriterArg, objectLocal);
if (!TryWritePrimitiveArray(collectionContract.UnderlyingType, itemType, objectLocal, itemName))
{
WriteArrayAttribute();
ilg.For(i, 0, objectLocal);
if (!TryWritePrimitive(itemType, null /*value*/, null /*memberInfo*/, i /*arrayItemIndex*/, itemName, 0 /*nameIndex*/))
{
WriteStartElement(itemName, 0 /*nameIndex*/);
ilg.LoadArrayElement(objectLocal, i);
LocalBuilder memberValue = ilg.DeclareLocal(itemType, "memberValue");
ilg.Stloc(memberValue);
WriteValue(memberValue);
WriteEndElement();
}
ilg.EndFor();
}
}
else
{
MethodInfo incrementCollectionCountMethod = null;
switch (collectionContract.Kind)
{
case CollectionKind.Collection:
case CollectionKind.List:
case CollectionKind.Dictionary:
incrementCollectionCountMethod = XmlFormatGeneratorStatics.IncrementCollectionCountMethod;
break;
case CollectionKind.GenericCollection:
case CollectionKind.GenericList:
incrementCollectionCountMethod = XmlFormatGeneratorStatics.IncrementCollectionCountGenericMethod.MakeGenericMethod(collectionContract.ItemType);
break;
case CollectionKind.GenericDictionary:
incrementCollectionCountMethod = XmlFormatGeneratorStatics.IncrementCollectionCountGenericMethod.MakeGenericMethod(Globals.TypeOfKeyValuePair.MakeGenericType(collectionContract.ItemType.GetGenericArguments()));
break;
}
if (incrementCollectionCountMethod != null)
{
ilg.Call(contextArg, incrementCollectionCountMethod, xmlWriterArg, objectLocal);
}
bool isDictionary = false, isGenericDictionary = false;
Type enumeratorType = null;
Type[] keyValueTypes = null;
if (collectionContract.Kind == CollectionKind.GenericDictionary)
{
isGenericDictionary = true;
keyValueTypes = collectionContract.ItemType.GetGenericArguments();
enumeratorType = Globals.TypeOfGenericDictionaryEnumerator.MakeGenericType(keyValueTypes);
}
else if (collectionContract.Kind == CollectionKind.Dictionary)
{
isDictionary = true;
keyValueTypes = new Type[] { Globals.TypeOfObject, Globals.TypeOfObject };
enumeratorType = Globals.TypeOfDictionaryEnumerator;
}
else
{
enumeratorType = collectionContract.GetEnumeratorMethod.ReturnType;
}
MethodInfo moveNextMethod = enumeratorType.GetMethod(Globals.MoveNextMethodName, BindingFlags.Instance | BindingFlags.Public, null, Globals.EmptyTypeArray, null);
MethodInfo getCurrentMethod = enumeratorType.GetMethod(Globals.GetCurrentMethodName, BindingFlags.Instance | BindingFlags.Public, null, Globals.EmptyTypeArray, null);
if (moveNextMethod == null || getCurrentMethod == null)
{
if (enumeratorType.IsInterface)
{
if (moveNextMethod == null)
moveNextMethod = JsonFormatGeneratorStatics.MoveNextMethod;
if (getCurrentMethod == null)
getCurrentMethod = JsonFormatGeneratorStatics.GetCurrentMethod;
}
else
{
Type ienumeratorInterface = Globals.TypeOfIEnumerator;
CollectionKind kind = collectionContract.Kind;
if (kind == CollectionKind.GenericDictionary || kind == CollectionKind.GenericCollection || kind == CollectionKind.GenericEnumerable)
{
Type[] interfaceTypes = enumeratorType.GetInterfaces();
foreach (Type interfaceType in interfaceTypes)
{
if (interfaceType.IsGenericType
&& interfaceType.GetGenericTypeDefinition() == Globals.TypeOfIEnumeratorGeneric
&& interfaceType.GetGenericArguments()[0] == collectionContract.ItemType)
{
ienumeratorInterface = interfaceType;
break;
}
}
}
if (moveNextMethod == null)
moveNextMethod = CollectionDataContract.GetTargetMethodWithName(Globals.MoveNextMethodName, enumeratorType, ienumeratorInterface);
if (getCurrentMethod == null)
getCurrentMethod = CollectionDataContract.GetTargetMethodWithName(Globals.GetCurrentMethodName, enumeratorType, ienumeratorInterface);
}
}
Type elementType = getCurrentMethod.ReturnType;
LocalBuilder currentValue = ilg.DeclareLocal(elementType, "currentValue");
LocalBuilder enumerator = ilg.DeclareLocal(enumeratorType, "enumerator");
ilg.Call(objectLocal, collectionContract.GetEnumeratorMethod);
if (isDictionary)
{
ConstructorInfo dictEnumCtor = enumeratorType.GetConstructor(Globals.ScanAllMembers, null, new Type[] { Globals.TypeOfIDictionaryEnumerator }, null);
ilg.ConvertValue(collectionContract.GetEnumeratorMethod.ReturnType, Globals.TypeOfIDictionaryEnumerator);
ilg.New(dictEnumCtor);
}
else if (isGenericDictionary)
{
Type ctorParam = Globals.TypeOfIEnumeratorGeneric.MakeGenericType(Globals.TypeOfKeyValuePair.MakeGenericType(keyValueTypes));
ConstructorInfo dictEnumCtor = enumeratorType.GetConstructor(Globals.ScanAllMembers, null, new Type[] { ctorParam }, null);
ilg.ConvertValue(collectionContract.GetEnumeratorMethod.ReturnType, ctorParam);
ilg.New(dictEnumCtor);
}
ilg.Stloc(enumerator);
WriteArrayAttribute();
ilg.ForEach(currentValue, elementType, enumeratorType, enumerator, getCurrentMethod);
if (incrementCollectionCountMethod == null)
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, 1);
}
if (!TryWritePrimitive(elementType, currentValue, null /*memberInfo*/, null /*arrayItemIndex*/, itemName, 0 /*nameIndex*/))
{
WriteStartElement(itemName, 0 /*nameIndex*/);
if (isGenericDictionary || isDictionary)
{
ilg.Call(dataContractArg, JsonFormatGeneratorStatics.GetItemContractMethod);
ilg.Call(JsonFormatGeneratorStatics.GetRevisedItemContractMethod);
ilg.Call(JsonFormatGeneratorStatics.GetJsonDataContractMethod);
ilg.Load(xmlWriterArg);
ilg.Load(currentValue);
ilg.ConvertValue(currentValue.LocalType, Globals.TypeOfObject);
ilg.Load(contextArg);
ilg.Load(currentValue.LocalType);
ilg.LoadMember(JsonFormatGeneratorStatics.TypeHandleProperty);
ilg.Call(JsonFormatGeneratorStatics.WriteJsonValueMethod);
}
else
{
WriteValue(currentValue);
}
WriteEndElement();
}
ilg.EndForEach(moveNextMethod);
}
}
bool TryWritePrimitive(Type type, LocalBuilder value, MemberInfo memberInfo, LocalBuilder arrayItemIndex, LocalBuilder name, int nameIndex)
{
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(type);
if (primitiveContract == null || primitiveContract.UnderlyingType == Globals.TypeOfObject)
return false;
// load writer
if (type.IsValueType)
{
ilg.Load(xmlWriterArg);
}
else
{
ilg.Load(contextArg);
ilg.Load(xmlWriterArg);
}
// load primitive value
if (value != null)
{
ilg.Load(value);
}
else if (memberInfo != null)
{
ilg.LoadAddress(objectLocal);
ilg.LoadMember(memberInfo);
}
else
{
ilg.LoadArrayElement(objectLocal, arrayItemIndex);
}
// load name
if (name != null)
{
ilg.Load(name);
}
else
{
ilg.LoadArrayElement(memberNamesArg, nameIndex);
}
// load namespace
ilg.Load(null);
// call method to write primitive
ilg.Call(primitiveContract.XmlFormatWriterMethod);
return true;
}
bool TryWritePrimitiveArray(Type type, Type itemType, LocalBuilder value, LocalBuilder itemName)
{
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(itemType);
if (primitiveContract == null)
return false;
string writeArrayMethod = null;
switch (Type.GetTypeCode(itemType))
{
case TypeCode.Boolean:
writeArrayMethod = "WriteJsonBooleanArray";
break;
case TypeCode.DateTime:
writeArrayMethod = "WriteJsonDateTimeArray";
break;
case TypeCode.Decimal:
writeArrayMethod = "WriteJsonDecimalArray";
break;
case TypeCode.Int32:
writeArrayMethod = "WriteJsonInt32Array";
break;
case TypeCode.Int64:
writeArrayMethod = "WriteJsonInt64Array";
break;
case TypeCode.Single:
writeArrayMethod = "WriteJsonSingleArray";
break;
case TypeCode.Double:
writeArrayMethod = "WriteJsonDoubleArray";
break;
default:
break;
}
if (writeArrayMethod != null)
{
WriteArrayAttribute();
ilg.Call(xmlWriterArg, typeof(JsonWriterDelegator).GetMethod(writeArrayMethod, Globals.ScanAllMembers, null, new Type[] { type, typeof(XmlDictionaryString), typeof(XmlDictionaryString) }, null), value, itemName, null);
return true;
}
return false;
}
void WriteArrayAttribute()
{
ilg.Call(xmlWriterArg, JsonFormatGeneratorStatics.WriteAttributeStringMethod,
null /* prefix */,
JsonGlobals.typeString /* local name */,
string.Empty /* namespace */,
JsonGlobals.arrayString /* value */);
}
void WriteValue(LocalBuilder memberValue)
{
Type memberType = memberValue.LocalType;
if (memberType.IsPointer)
{
ilg.Load(memberValue);
ilg.Load(memberType);
ilg.Call(JsonFormatGeneratorStatics.BoxPointer);
memberType = Globals.TypeOfReflectionPointer;
memberValue = ilg.DeclareLocal(memberType, "memberValueRefPointer");
ilg.Store(memberValue);
}
bool isNullableOfT = (memberType.IsGenericType &&
memberType.GetGenericTypeDefinition() == Globals.TypeOfNullable);
if (memberType.IsValueType && !isNullableOfT)
{
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(memberType);
if (primitiveContract != null)
ilg.Call(xmlWriterArg, primitiveContract.XmlFormatContentWriterMethod, memberValue);
else
InternalSerialize(XmlFormatGeneratorStatics.InternalSerializeMethod, memberValue, memberType, false /* writeXsiType */);
}
else
{
if (isNullableOfT)
{
memberValue = UnwrapNullableObject(memberValue);//Leaves !HasValue on stack
memberType = memberValue.LocalType;
}
else
{
ilg.Load(memberValue);
ilg.Load(null);
ilg.Ceq();
}
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.WriteNullMethod, xmlWriterArg, memberType, DataContract.IsTypeSerializable(memberType));
ilg.Else();
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(memberType);
if (primitiveContract != null && primitiveContract.UnderlyingType != Globals.TypeOfObject)
{
if (isNullableOfT)
{
ilg.Call(xmlWriterArg, primitiveContract.XmlFormatContentWriterMethod, memberValue);
}
else
{
ilg.Call(contextArg, primitiveContract.XmlFormatContentWriterMethod, xmlWriterArg, memberValue);
}
}
else
{
if (memberType == Globals.TypeOfObject ||//boxed Nullable
memberType == Globals.TypeOfValueType ||
((IList)Globals.TypeOfNullable.GetInterfaces()).Contains(memberType))
{
ilg.Load(memberValue);
ilg.ConvertValue(memberValue.LocalType, Globals.TypeOfObject);
memberValue = ilg.DeclareLocal(Globals.TypeOfObject, "unwrappedMemberValue");
memberType = memberValue.LocalType;
ilg.Stloc(memberValue);
ilg.If(memberValue, Cmp.EqualTo, null);
ilg.Call(contextArg, XmlFormatGeneratorStatics.WriteNullMethod, xmlWriterArg, memberType, DataContract.IsTypeSerializable(memberType));
ilg.Else();
}
InternalSerialize((isNullableOfT ? XmlFormatGeneratorStatics.InternalSerializeMethod : XmlFormatGeneratorStatics.InternalSerializeReferenceMethod),
memberValue, memberType, false /* writeXsiType */);
if (memberType == Globals.TypeOfObject) //boxed Nullable
ilg.EndIf();
}
ilg.EndIf();
}
}
void InternalSerialize(MethodInfo methodInfo, LocalBuilder memberValue, Type memberType, bool writeXsiType)
{
ilg.Load(contextArg);
ilg.Load(xmlWriterArg);
ilg.Load(memberValue);
ilg.ConvertValue(memberValue.LocalType, Globals.TypeOfObject);
LocalBuilder typeHandleValue = ilg.DeclareLocal(typeof(RuntimeTypeHandle), "typeHandleValue");
ilg.Call(null, typeof(Type).GetMethod("GetTypeHandle"), memberValue);
ilg.Stloc(typeHandleValue);
ilg.LoadAddress(typeHandleValue);
ilg.Ldtoken(memberType);
ilg.Call(typeof(RuntimeTypeHandle).GetMethod("Equals", new Type[] { typeof(RuntimeTypeHandle) }));
ilg.Load(writeXsiType);
ilg.Load(DataContract.GetId(memberType.TypeHandle));
ilg.Ldtoken(memberType);
ilg.Call(methodInfo);
}
LocalBuilder UnwrapNullableObject(LocalBuilder memberValue)// Leaves !HasValue on stack
{
Type memberType = memberValue.LocalType;
Label onNull = ilg.DefineLabel();
Label end = ilg.DefineLabel();
ilg.Load(memberValue);
while (memberType.IsGenericType && memberType.GetGenericTypeDefinition() == Globals.TypeOfNullable)
{
Type innerType = memberType.GetGenericArguments()[0];
ilg.Dup();
ilg.Call(XmlFormatGeneratorStatics.GetHasValueMethod.MakeGenericMethod(innerType));
ilg.Brfalse(onNull);
ilg.Call(XmlFormatGeneratorStatics.GetNullableValueMethod.MakeGenericMethod(innerType));
memberType = innerType;
}
memberValue = ilg.DeclareLocal(memberType, "nullableUnwrappedMemberValue");
ilg.Stloc(memberValue);
ilg.Load(false); //isNull
ilg.Br(end);
ilg.MarkLabel(onNull);
ilg.Pop();
ilg.Call(XmlFormatGeneratorStatics.GetDefaultValueMethod.MakeGenericMethod(memberType));
ilg.Stloc(memberValue);
ilg.Load(true);//isNull
ilg.MarkLabel(end);
return memberValue;
}
void WriteStartElement(LocalBuilder nameLocal, int nameIndex)
{
ilg.Load(xmlWriterArg);
// localName
if (nameLocal == null)
ilg.LoadArrayElement(memberNamesArg, nameIndex);
else
ilg.Load(nameLocal);
// namespace
ilg.Load(null);
ilg.Call(JsonFormatGeneratorStatics.WriteStartElementMethod);
}
void WriteEndElement()
{
ilg.Call(xmlWriterArg, JsonFormatGeneratorStatics.WriteEndElementMethod);
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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