Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / Json / JsonFormatReaderGenerator.cs / 1305376 / JsonFormatReaderGenerator.cs
//------------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization.Json
{
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime;
using System.Security;
using System.Security.Permissions;
using System.Xml;
delegate object JsonFormatClassReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString[] memberNames);
delegate object JsonFormatCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString itemName, CollectionDataContract collectionContract);
delegate void JsonFormatGetOnlyCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContextComplexJson context, XmlDictionaryString emptyDictionaryString, XmlDictionaryString itemName, CollectionDataContract collectionContract);
sealed class JsonFormatReaderGenerator
{
[Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that was produced within an assert.")]
[SecurityCritical]
CriticalHelper helper;
[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.")]
[SecurityCritical]
public JsonFormatReaderGenerator()
{
helper = new CriticalHelper();
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public JsonFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
{
return helper.GenerateClassReader(classContract);
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public JsonFormatCollectionReaderDelegate GenerateCollectionReader(CollectionDataContract collectionContract)
{
return helper.GenerateCollectionReader(collectionContract);
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public JsonFormatGetOnlyCollectionReaderDelegate GenerateGetOnlyCollectionReader(CollectionDataContract collectionContract)
{
return helper.GenerateGetOnlyCollectionReader(collectionContract);
}
[Fx.Tag.SecurityNote(Miscellaneous = "RequiresReview - 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.")]
class CriticalHelper
{
CodeGenerator ilg;
LocalBuilder objectLocal;
Type objectType;
ArgBuilder xmlReaderArg;
ArgBuilder contextArg;
ArgBuilder memberNamesArg;
ArgBuilder collectionContractArg;
ArgBuilder emptyDictionaryStringArg;
public JsonFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
{
ilg = new CodeGenerator();
bool memberAccessFlag = classContract.RequiresMemberAccessForRead(null);
try
{
BeginMethod(ilg, "Read" + classContract.StableName.Name + "FromJson", typeof(JsonFormatClassReaderDelegate), memberAccessFlag);
}
catch (SecurityException securityException)
{
if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
{
classContract.RequiresMemberAccessForRead(securityException);
}
else
{
throw;
}
}
InitArgs();
DemandSerializationFormatterPermission(classContract);
DemandMemberAccessPermission(memberAccessFlag);
CreateObject(classContract);
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, objectLocal);
InvokeOnDeserializing(classContract);
if (classContract.IsISerializable)
ReadISerializable(classContract);
else
ReadClass(classContract);
if (Globals.TypeOfIDeserializationCallback.IsAssignableFrom(classContract.UnderlyingType))
ilg.Call(objectLocal, JsonFormatGeneratorStatics.OnDeserializationMethod, null);
InvokeOnDeserialized(classContract);
if (!InvokeFactoryMethod(classContract))
{
ilg.Load(objectLocal);
// Do a conversion back from DateTimeOffsetAdapter to DateTimeOffset after deserialization.
// DateTimeOffsetAdapter is used here for deserialization purposes to bypass the ISerializable implementation
// on DateTimeOffset; which does not work in partial trust.
if (classContract.UnderlyingType == Globals.TypeOfDateTimeOffsetAdapter)
{
ilg.ConvertValue(objectLocal.LocalType, Globals.TypeOfDateTimeOffsetAdapter);
ilg.Call(XmlFormatGeneratorStatics.GetDateTimeOffsetMethod);
ilg.ConvertValue(Globals.TypeOfDateTimeOffset, ilg.CurrentMethod.ReturnType);
}
else
{
ilg.ConvertValue(objectLocal.LocalType, ilg.CurrentMethod.ReturnType);
}
}
return (JsonFormatClassReaderDelegate)ilg.EndMethod();
}
public JsonFormatCollectionReaderDelegate GenerateCollectionReader(CollectionDataContract collectionContract)
{
ilg = GenerateCollectionReaderHelper(collectionContract, false /*isGetOnlyCollection*/);
ReadCollection(collectionContract);
ilg.Load(objectLocal);
ilg.ConvertValue(objectLocal.LocalType, ilg.CurrentMethod.ReturnType);
return (JsonFormatCollectionReaderDelegate)ilg.EndMethod();
}
public JsonFormatGetOnlyCollectionReaderDelegate GenerateGetOnlyCollectionReader(CollectionDataContract collectionContract)
{
ilg = GenerateCollectionReaderHelper(collectionContract, true /*isGetOnlyCollection*/);
ReadGetOnlyCollection(collectionContract);
return (JsonFormatGetOnlyCollectionReaderDelegate)ilg.EndMethod();
}
CodeGenerator GenerateCollectionReaderHelper(CollectionDataContract collectionContract, bool isGetOnlyCollection)
{
ilg = new CodeGenerator();
bool memberAccessFlag = collectionContract.RequiresMemberAccessForRead(null);
try
{
if (isGetOnlyCollection)
{
BeginMethod(ilg, "Read" + collectionContract.StableName.Name + "FromJson" + "IsGetOnly", typeof(JsonFormatGetOnlyCollectionReaderDelegate), memberAccessFlag);
}
else
{
BeginMethod(ilg, "Read" + collectionContract.StableName.Name + "FromJson", typeof(JsonFormatCollectionReaderDelegate), memberAccessFlag);
}
}
catch (SecurityException securityException)
{
if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
{
collectionContract.RequiresMemberAccessForRead(securityException);
}
else
{
throw;
}
}
InitArgs();
DemandMemberAccessPermission(memberAccessFlag);
collectionContractArg = ilg.GetArg(4);
return ilg;
}
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(JsonFormatReaderGenerator).Module, allowPrivateMemberAccess);
ilg.BeginMethod(dynamicMethod, delegateType, methodName, paramTypes, allowPrivateMemberAccess);
#endif
}
void InitArgs()
{
xmlReaderArg = ilg.GetArg(0);
contextArg = ilg.GetArg(1);
emptyDictionaryStringArg = ilg.GetArg(2);
memberNamesArg = ilg.GetArg(3);
}
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 CreateObject(ClassDataContract classContract)
{
Type type = objectType = classContract.UnderlyingType;
if (type.IsValueType && !classContract.IsNonAttributedType)
type = Globals.TypeOfValueType;
objectLocal = ilg.DeclareLocal(type, "objectDeserialized");
if (classContract.UnderlyingType == Globals.TypeOfDBNull)
{
ilg.LoadMember(Globals.TypeOfDBNull.GetField("Value"));
ilg.Stloc(objectLocal);
}
else if (classContract.IsNonAttributedType)
{
if (type.IsValueType)
{
ilg.Ldloca(objectLocal);
ilg.InitObj(type);
}
else
{
ilg.New(classContract.GetNonAttributedTypeConstructor());
ilg.Stloc(objectLocal);
}
}
else
{
ilg.Call(null, JsonFormatGeneratorStatics.GetUninitializedObjectMethod, DataContract.GetIdForInitialization(classContract));
ilg.ConvertValue(Globals.TypeOfObject, type);
ilg.Stloc(objectLocal);
}
}
void InvokeOnDeserializing(ClassDataContract classContract)
{
if (classContract.BaseContract != null)
InvokeOnDeserializing(classContract.BaseContract);
if (classContract.OnDeserializing != null)
{
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, objectType);
ilg.Load(contextArg);
ilg.LoadMember(XmlFormatGeneratorStatics.GetStreamingContextMethod);
ilg.Call(classContract.OnDeserializing);
}
}
void InvokeOnDeserialized(ClassDataContract classContract)
{
if (classContract.BaseContract != null)
InvokeOnDeserialized(classContract.BaseContract);
if (classContract.OnDeserialized != null)
{
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, objectType);
ilg.Load(contextArg);
ilg.LoadMember(XmlFormatGeneratorStatics.GetStreamingContextMethod);
ilg.Call(classContract.OnDeserialized);
}
}
bool HasFactoryMethod(ClassDataContract classContract)
{
return Globals.TypeOfIObjectReference.IsAssignableFrom(classContract.UnderlyingType);
}
bool InvokeFactoryMethod(ClassDataContract classContract)
{
if (HasFactoryMethod(classContract))
{
ilg.Load(contextArg);
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, Globals.TypeOfIObjectReference);
ilg.Load(Globals.NewObjectId);
ilg.Call(XmlFormatGeneratorStatics.GetRealObjectMethod);
ilg.ConvertValue(Globals.TypeOfObject, ilg.CurrentMethod.ReturnType);
return true;
}
return false;
}
void ReadClass(ClassDataContract classContract)
{
if (classContract.HasExtensionData)
{
LocalBuilder extensionDataLocal = ilg.DeclareLocal(Globals.TypeOfExtensionDataObject, "extensionData");
ilg.New(JsonFormatGeneratorStatics.ExtensionDataObjectCtor);
ilg.Store(extensionDataLocal);
ReadMembers(classContract, extensionDataLocal);
ClassDataContract currentContract = classContract;
while (currentContract != null)
{
MethodInfo extensionDataSetMethod = currentContract.ExtensionDataSetMethod;
if (extensionDataSetMethod != null)
ilg.Call(objectLocal, extensionDataSetMethod, extensionDataLocal);
currentContract = currentContract.BaseContract;
}
}
else
ReadMembers(classContract, null /*extensionDataLocal*/);
}
void ReadMembers(ClassDataContract classContract, LocalBuilder extensionDataLocal)
{
int memberCount = classContract.MemberNames.Length;
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, memberCount);
BitFlagsGenerator expectedElements = new BitFlagsGenerator(memberCount, ilg, classContract.UnderlyingType.Name + "_ExpectedElements");
byte[] requiredElements = new byte[expectedElements.GetLocalCount()];
SetRequiredElements(classContract, requiredElements);
SetExpectedElements(expectedElements, 0 /*startIndex*/);
LocalBuilder memberIndexLocal = ilg.DeclareLocal(Globals.TypeOfInt, "memberIndex", -1);
Label throwDuplicateMemberLabel = ilg.DefineLabel();
Label throwMissingRequiredMembersLabel = ilg.DefineLabel();
object forReadElements = ilg.For(null, null, null);
ilg.Call(null, XmlFormatGeneratorStatics.MoveToNextElementMethod, xmlReaderArg);
ilg.IfFalseBreak(forReadElements);
ilg.Call(contextArg, JsonFormatGeneratorStatics.GetJsonMemberIndexMethod, xmlReaderArg, memberNamesArg, memberIndexLocal, extensionDataLocal);
if (memberCount > 0)
{
Label[] memberLabels = ilg.Switch(memberCount);
ReadMembers(classContract, expectedElements, memberLabels, throwDuplicateMemberLabel, memberIndexLocal);
ilg.EndSwitch();
}
else
{
ilg.Pop();
}
ilg.EndFor();
CheckRequiredElements(expectedElements, requiredElements, throwMissingRequiredMembersLabel);
Label endOfTypeLabel = ilg.DefineLabel();
ilg.Br(endOfTypeLabel);
ilg.MarkLabel(throwDuplicateMemberLabel);
ilg.Call(null, JsonFormatGeneratorStatics.ThrowDuplicateMemberExceptionMethod, objectLocal, memberNamesArg, memberIndexLocal);
ilg.MarkLabel(throwMissingRequiredMembersLabel);
ilg.Load(objectLocal);
ilg.ConvertValue(objectLocal.LocalType, Globals.TypeOfObject);
ilg.Load(memberNamesArg);
expectedElements.LoadArray();
LoadArray(requiredElements, "requiredElements");
ilg.Call(JsonFormatGeneratorStatics.ThrowMissingRequiredMembersMethod);
ilg.MarkLabel(endOfTypeLabel);
}
int ReadMembers(ClassDataContract classContract, BitFlagsGenerator expectedElements,
Label[] memberLabels, Label throwDuplicateMemberLabel, LocalBuilder memberIndexLocal)
{
int memberCount = (classContract.BaseContract == null) ? 0 :
ReadMembers(classContract.BaseContract, expectedElements, memberLabels, throwDuplicateMemberLabel, memberIndexLocal);
for (int i = 0; i < classContract.Members.Count; i++, memberCount++)
{
DataMember dataMember = classContract.Members[i];
Type memberType = dataMember.MemberType;
ilg.Case(memberLabels[memberCount], dataMember.Name);
ilg.Set(memberIndexLocal, memberCount);
expectedElements.Load(memberCount);
ilg.Brfalse(throwDuplicateMemberLabel);
LocalBuilder value = null;
if (dataMember.IsGetOnlyCollection)
{
ilg.LoadAddress(objectLocal);
ilg.LoadMember(dataMember.MemberInfo);
value = ilg.DeclareLocal(memberType, dataMember.Name + "Value");
ilg.Stloc(value);
ilg.Call(contextArg, XmlFormatGeneratorStatics.StoreCollectionMemberInfoMethod, value);
ReadValue(memberType, dataMember.Name);
}
else
{
value = ReadValue(memberType, dataMember.Name);
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, objectType);
ilg.Ldloc(value);
ilg.StoreMember(dataMember.MemberInfo);
}
ResetExpectedElements(expectedElements, memberCount);
ilg.EndCase();
}
return memberCount;
}
void CheckRequiredElements(BitFlagsGenerator expectedElements, byte[] requiredElements, Label throwMissingRequiredMembersLabel)
{
for (int i = 0; i < requiredElements.Length; i++)
{
ilg.Load(expectedElements.GetLocal(i));
ilg.Load(requiredElements[i]);
ilg.And();
ilg.Load(0);
ilg.Ceq();
ilg.Brfalse(throwMissingRequiredMembersLabel);
}
}
void LoadArray(byte[] array, string name)
{
LocalBuilder localArray = ilg.DeclareLocal(Globals.TypeOfByteArray, name);
ilg.NewArray(typeof(byte), array.Length);
ilg.Store(localArray);
for (int i = 0; i < array.Length; i++)
{
ilg.StoreArrayElement(localArray, i, array[i]);
}
ilg.Load(localArray);
}
int SetRequiredElements(ClassDataContract contract, byte[] requiredElements)
{
int memberCount = (contract.BaseContract == null) ? 0 :
SetRequiredElements(contract.BaseContract, requiredElements);
List members = contract.Members;
for (int i = 0; i < members.Count; i++, memberCount++)
{
if (members[i].IsRequired)
{
BitFlagsGenerator.SetBit(requiredElements, memberCount);
}
}
return memberCount;
}
void SetExpectedElements(BitFlagsGenerator expectedElements, int startIndex)
{
int memberCount = expectedElements.GetBitCount();
for (int i = startIndex; i < memberCount; i++)
{
expectedElements.Store(i, true);
}
}
void ResetExpectedElements(BitFlagsGenerator expectedElements, int index)
{
expectedElements.Store(index, false);
}
void ReadISerializable(ClassDataContract classContract)
{
ConstructorInfo ctor = classContract.UnderlyingType.GetConstructor(Globals.ScanAllMembers, null, JsonFormatGeneratorStatics.SerInfoCtorArgs, null);
if (ctor == null)
throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.SerializationInfo_ConstructorNotFound, DataContract.GetClrTypeFullName(classContract.UnderlyingType))));
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, objectType);
ilg.Call(contextArg, XmlFormatGeneratorStatics.ReadSerializationInfoMethod, xmlReaderArg, classContract.UnderlyingType);
ilg.Load(contextArg);
ilg.LoadMember(XmlFormatGeneratorStatics.GetStreamingContextMethod);
ilg.Call(ctor);
}
LocalBuilder ReadValue(Type type, string name)
{
LocalBuilder value = ilg.DeclareLocal(type, "valueRead");
LocalBuilder nullableValue = null;
int nullables = 0;
while (type.IsGenericType && type.GetGenericTypeDefinition() == Globals.TypeOfNullable)
{
nullables++;
type = type.GetGenericArguments()[0];
}
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(type);
if ((primitiveContract != null && primitiveContract.UnderlyingType != Globals.TypeOfObject) || nullables != 0 || type.IsValueType)
{
LocalBuilder objectId = ilg.DeclareLocal(Globals.TypeOfString, "objectIdRead");
ilg.Call(contextArg, XmlFormatGeneratorStatics.ReadAttributesMethod, xmlReaderArg);
ilg.Call(contextArg, XmlFormatGeneratorStatics.ReadIfNullOrRefMethod, xmlReaderArg, type, DataContract.IsTypeSerializable(type));
ilg.Stloc(objectId);
// Deserialize null
ilg.If(objectId, Cmp.EqualTo, Globals.NullObjectId);
if (nullables != 0)
{
ilg.LoadAddress(value);
ilg.InitObj(value.LocalType);
}
else if (type.IsValueType)
ThrowValidationException(SR.GetString(SR.ValueTypeCannotBeNull, DataContract.GetClrTypeFullName(type)));
else
{
ilg.Load(null);
ilg.Stloc(value);
}
// Deserialize value
// Compare against Globals.NewObjectId, which is set to string.Empty
ilg.ElseIfIsEmptyString(objectId);
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetObjectIdMethod);
ilg.Stloc(objectId);
if (type.IsValueType)
{
ilg.IfNotIsEmptyString(objectId);
ThrowValidationException(SR.GetString(SR.ValueTypeCannotHaveId, DataContract.GetClrTypeFullName(type)));
ilg.EndIf();
}
if (nullables != 0)
{
nullableValue = value;
value = ilg.DeclareLocal(type, "innerValueRead");
}
if (primitiveContract != null && primitiveContract.UnderlyingType != Globals.TypeOfObject)
{
ilg.Call(xmlReaderArg, primitiveContract.XmlFormatReaderMethod);
ilg.Stloc(value);
if (!type.IsValueType)
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, value);
}
else
{
InternalDeserialize(value, type, name);
}
// Deserialize ref
ilg.Else();
if (type.IsValueType)
ThrowValidationException(SR.GetString(SR.ValueTypeCannotHaveRef, DataContract.GetClrTypeFullName(type)));
else
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetExistingObjectMethod, objectId, type, name, string.Empty);
ilg.ConvertValue(Globals.TypeOfObject, type);
ilg.Stloc(value);
}
ilg.EndIf();
if (nullableValue != null)
{
ilg.If(objectId, Cmp.NotEqualTo, Globals.NullObjectId);
WrapNullableObject(value, nullableValue, nullables);
ilg.EndIf();
value = nullableValue;
}
}
else
{
InternalDeserialize(value, type, name);
}
return value;
}
void InternalDeserialize(LocalBuilder value, Type type, string name)
{
ilg.Load(contextArg);
ilg.Load(xmlReaderArg);
Type declaredType = type.IsPointer ? Globals.TypeOfReflectionPointer : type;
ilg.Load(DataContract.GetId(declaredType.TypeHandle));
ilg.Ldtoken(declaredType);
ilg.Load(name);
// Empty namespace
ilg.Load(string.Empty);
ilg.Call(XmlFormatGeneratorStatics.InternalDeserializeMethod);
if (type.IsPointer)
ilg.Call(JsonFormatGeneratorStatics.UnboxPointer);
else
ilg.ConvertValue(Globals.TypeOfObject, type);
ilg.Stloc(value);
}
void WrapNullableObject(LocalBuilder innerValue, LocalBuilder outerValue, int nullables)
{
Type innerType = innerValue.LocalType, outerType = outerValue.LocalType;
ilg.LoadAddress(outerValue);
ilg.Load(innerValue);
for (int i = 1; i < nullables; i++)
{
Type type = Globals.TypeOfNullable.MakeGenericType(innerType);
ilg.New(type.GetConstructor(new Type[] { innerType }));
innerType = type;
}
ilg.Call(outerType.GetConstructor(new Type[] { innerType }));
}
void ReadCollection(CollectionDataContract collectionContract)
{
Type type = collectionContract.UnderlyingType;
Type itemType = collectionContract.ItemType;
bool isArray = (collectionContract.Kind == CollectionKind.Array);
ConstructorInfo constructor = collectionContract.Constructor;
if (type.IsInterface)
{
switch (collectionContract.Kind)
{
case CollectionKind.GenericDictionary:
type = Globals.TypeOfDictionaryGeneric.MakeGenericType(itemType.GetGenericArguments());
constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Globals.EmptyTypeArray, null);
break;
case CollectionKind.Dictionary:
type = Globals.TypeOfHashtable;
constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Globals.EmptyTypeArray, null);
break;
case CollectionKind.Collection:
case CollectionKind.GenericCollection:
case CollectionKind.Enumerable:
case CollectionKind.GenericEnumerable:
case CollectionKind.List:
case CollectionKind.GenericList:
type = itemType.MakeArrayType();
isArray = true;
break;
}
}
objectLocal = ilg.DeclareLocal(type, "objectDeserialized");
if (!isArray)
{
if (type.IsValueType)
{
ilg.Ldloca(objectLocal);
ilg.InitObj(type);
}
else
{
ilg.New(constructor);
ilg.Stloc(objectLocal);
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, objectLocal);
}
}
LocalBuilder size = ilg.DeclareLocal(Globals.TypeOfInt, "arraySize");
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetArraySizeMethod);
ilg.Stloc(size);
LocalBuilder objectId = ilg.DeclareLocal(Globals.TypeOfString, "objectIdRead");
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetObjectIdMethod);
ilg.Stloc(objectId);
bool canReadPrimitiveArray = false;
if (isArray && TryReadPrimitiveArray(itemType, size))
{
canReadPrimitiveArray = true;
ilg.IfNot();
}
ilg.If(size, Cmp.EqualTo, -1);
LocalBuilder growingCollection = null;
if (isArray)
{
growingCollection = ilg.DeclareLocal(type, "growingCollection");
ilg.NewArray(itemType, 32);
ilg.Stloc(growingCollection);
}
LocalBuilder i = ilg.DeclareLocal(Globals.TypeOfInt, "i");
object forLoop = ilg.For(i, 0, Int32.MaxValue);
// Empty namespace
IsStartElement(memberNamesArg, emptyDictionaryStringArg);
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, 1);
LocalBuilder value = ReadCollectionItem(collectionContract, itemType);
if (isArray)
{
MethodInfo ensureArraySizeMethod = XmlFormatGeneratorStatics.EnsureArraySizeMethod.MakeGenericMethod(itemType);
ilg.Call(null, ensureArraySizeMethod, growingCollection, i);
ilg.Stloc(growingCollection);
ilg.StoreArrayElement(growingCollection, i, value);
}
else
StoreCollectionValue(objectLocal, value, collectionContract);
ilg.Else();
IsEndElement();
ilg.If();
ilg.Break(forLoop);
ilg.Else();
HandleUnexpectedItemInCollection(i);
ilg.EndIf();
ilg.EndIf();
ilg.EndFor();
if (isArray)
{
MethodInfo trimArraySizeMethod = XmlFormatGeneratorStatics.TrimArraySizeMethod.MakeGenericMethod(itemType);
ilg.Call(null, trimArraySizeMethod, growingCollection, i);
ilg.Stloc(objectLocal);
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectWithIdMethod, objectId, objectLocal);
}
ilg.Else();
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, size);
if (isArray)
{
ilg.NewArray(itemType, size);
ilg.Stloc(objectLocal);
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, objectLocal);
}
LocalBuilder j = ilg.DeclareLocal(Globals.TypeOfInt, "j");
ilg.For(j, 0, size);
// Empty namespace
IsStartElement(memberNamesArg, emptyDictionaryStringArg);
ilg.If();
LocalBuilder itemValue = ReadCollectionItem(collectionContract, itemType);
if (isArray)
ilg.StoreArrayElement(objectLocal, j, itemValue);
else
StoreCollectionValue(objectLocal, itemValue, collectionContract);
ilg.Else();
HandleUnexpectedItemInCollection(j);
ilg.EndIf();
ilg.EndFor();
// Empty namespace
ilg.Call(contextArg, XmlFormatGeneratorStatics.CheckEndOfArrayMethod, xmlReaderArg, size, memberNamesArg, emptyDictionaryStringArg);
ilg.EndIf();
if (canReadPrimitiveArray)
{
ilg.Else();
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectWithIdMethod, objectId, objectLocal);
ilg.EndIf();
}
}
void ReadGetOnlyCollection(CollectionDataContract collectionContract)
{
Type type = collectionContract.UnderlyingType;
Type itemType = collectionContract.ItemType;
bool isArray = (collectionContract.Kind == CollectionKind.Array);
objectLocal = ilg.DeclareLocal(type, "objectDeserialized");
ilg.Load(contextArg);
ilg.LoadMember(XmlFormatGeneratorStatics.GetCollectionMemberMethod);
ilg.ConvertValue(Globals.TypeOfObject, type);
ilg.Stloc(objectLocal);
//check that items are actually going to be deserialized into the collection
IsStartElement(memberNamesArg, emptyDictionaryStringArg);
ilg.If();
ilg.If(objectLocal, Cmp.EqualTo, null);
ilg.Call(null, XmlFormatGeneratorStatics.ThrowNullValueReturnedForGetOnlyCollectionExceptionMethod, type);
ilg.Else();
LocalBuilder size = ilg.DeclareLocal(Globals.TypeOfInt, "arraySize");
if (isArray)
{
ilg.Load(objectLocal);
ilg.Call(XmlFormatGeneratorStatics.GetArrayLengthMethod);
ilg.Stloc(size);
}
LocalBuilder i = ilg.DeclareLocal(Globals.TypeOfInt, "i");
object forLoop = ilg.For(i, 0, Int32.MaxValue);
IsStartElement(memberNamesArg, emptyDictionaryStringArg);
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, 1);
LocalBuilder value = ReadCollectionItem(collectionContract, itemType);
if (isArray)
{
ilg.If(size, Cmp.EqualTo, i);
ilg.Call(null, XmlFormatGeneratorStatics.ThrowArrayExceededSizeExceptionMethod, size, type);
ilg.Else();
ilg.StoreArrayElement(objectLocal, i, value);
ilg.EndIf();
}
else
StoreCollectionValue(objectLocal, value, collectionContract);
ilg.Else();
IsEndElement();
ilg.If();
ilg.Break(forLoop);
ilg.Else();
HandleUnexpectedItemInCollection(i);
ilg.EndIf();
ilg.EndIf();
ilg.EndFor();
ilg.Call(contextArg, XmlFormatGeneratorStatics.CheckEndOfArrayMethod, xmlReaderArg, size, memberNamesArg, emptyDictionaryStringArg);
ilg.EndIf();
ilg.EndIf();
}
bool TryReadPrimitiveArray(Type itemType, LocalBuilder size)
{
PrimitiveDataContract primitiveContract = PrimitiveDataContract.GetPrimitiveDataContract(itemType);
if (primitiveContract == null)
return false;
string readArrayMethod = null;
switch (Type.GetTypeCode(itemType))
{
case TypeCode.Boolean:
readArrayMethod = "TryReadBooleanArray";
break;
case TypeCode.Decimal:
readArrayMethod = "TryReadDecimalArray";
break;
case TypeCode.Int32:
readArrayMethod = "TryReadInt32Array";
break;
case TypeCode.Int64:
readArrayMethod = "TryReadInt64Array";
break;
case TypeCode.Single:
readArrayMethod = "TryReadSingleArray";
break;
case TypeCode.Double:
readArrayMethod = "TryReadDoubleArray";
break;
case TypeCode.DateTime:
readArrayMethod = "TryReadJsonDateTimeArray";
break;
default:
break;
}
if (readArrayMethod != null)
{
ilg.Load(xmlReaderArg);
ilg.ConvertValue(typeof(XmlReaderDelegator), typeof(JsonReaderDelegator));
ilg.Load(contextArg);
ilg.Load(memberNamesArg);
// Empty namespace
ilg.Load(emptyDictionaryStringArg);
ilg.Load(size);
ilg.Ldloca(objectLocal);
ilg.Call(typeof(JsonReaderDelegator).GetMethod(readArrayMethod, Globals.ScanAllMembers));
return true;
}
return false;
}
LocalBuilder ReadCollectionItem(CollectionDataContract collectionContract, Type itemType)
{
if (collectionContract.Kind == CollectionKind.Dictionary || collectionContract.Kind == CollectionKind.GenericDictionary)
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.ResetAttributesMethod);
LocalBuilder value = ilg.DeclareLocal(itemType, "valueRead");
ilg.Load(collectionContractArg);
ilg.Call(JsonFormatGeneratorStatics.GetItemContractMethod);
ilg.Call(JsonFormatGeneratorStatics.GetRevisedItemContractMethod);
ilg.Load(xmlReaderArg);
ilg.Load(contextArg);
ilg.Call(JsonFormatGeneratorStatics.ReadJsonValueMethod);
ilg.ConvertValue(Globals.TypeOfObject, itemType);
ilg.Stloc(value);
return value;
}
else
{
return ReadValue(itemType, JsonGlobals.itemString);
}
}
void StoreCollectionValue(LocalBuilder collection, LocalBuilder value, CollectionDataContract collectionContract)
{
if (collectionContract.Kind == CollectionKind.GenericDictionary || collectionContract.Kind == CollectionKind.Dictionary)
{
ClassDataContract keyValuePairContract = DataContract.GetDataContract(value.LocalType) as ClassDataContract;
if (keyValuePairContract == null)
{
Fx.Assert("Failed to create contract for KeyValuePair type");
}
DataMember keyMember = keyValuePairContract.Members[0];
DataMember valueMember = keyValuePairContract.Members[1];
LocalBuilder pairKey = ilg.DeclareLocal(keyMember.MemberType, keyMember.Name);
LocalBuilder pairValue = ilg.DeclareLocal(valueMember.MemberType, valueMember.Name);
ilg.LoadAddress(value);
ilg.LoadMember(keyMember.MemberInfo);
ilg.Stloc(pairKey);
ilg.LoadAddress(value);
ilg.LoadMember(valueMember.MemberInfo);
ilg.Stloc(pairValue);
ilg.Call(collection, collectionContract.AddMethod, pairKey, pairValue);
if (collectionContract.AddMethod.ReturnType != Globals.TypeOfVoid)
ilg.Pop();
}
else
{
ilg.Call(collection, collectionContract.AddMethod, value);
if (collectionContract.AddMethod.ReturnType != Globals.TypeOfVoid)
ilg.Pop();
}
}
void HandleUnexpectedItemInCollection(LocalBuilder iterator)
{
IsStartElement();
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.SkipUnknownElementMethod, xmlReaderArg);
ilg.Dec(iterator);
ilg.Else();
ThrowUnexpectedStateException(XmlNodeType.Element);
ilg.EndIf();
}
void IsStartElement(ArgBuilder nameArg, ArgBuilder nsArg)
{
ilg.Call(xmlReaderArg, JsonFormatGeneratorStatics.IsStartElementMethod2, nameArg, nsArg);
}
void IsStartElement()
{
ilg.Call(xmlReaderArg, JsonFormatGeneratorStatics.IsStartElementMethod0);
}
void IsEndElement()
{
ilg.Load(xmlReaderArg);
ilg.LoadMember(JsonFormatGeneratorStatics.NodeTypeProperty);
ilg.Load(XmlNodeType.EndElement);
ilg.Ceq();
}
void ThrowUnexpectedStateException(XmlNodeType expectedState)
{
ilg.Call(null, XmlFormatGeneratorStatics.CreateUnexpectedStateExceptionMethod, expectedState, xmlReaderArg);
ilg.Throw();
}
void ThrowValidationException(string msg, params object[] values)
{
if (values != null && values.Length > 0)
ilg.CallStringFormat(msg, values);
else
ilg.Load(msg);
ThrowValidationException();
}
void ThrowValidationException()
{
ilg.New(JsonFormatGeneratorStatics.SerializationExceptionCtor);
ilg.Throw();
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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