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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization
{
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.Serialization.Diagnostics.Application;
using System.Security;
using System.Security.Permissions;
using System.Xml;
#if USE_REFEMIT
public delegate object XmlFormatClassReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString[] memberNames, XmlDictionaryString[] memberNamespaces);
public delegate object XmlFormatCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString itemName, XmlDictionaryString itemNamespace, CollectionDataContract collectionContract);
public delegate void XmlFormatGetOnlyCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString itemName, XmlDictionaryString itemNamespace, CollectionDataContract collectionContract);
public sealed class XmlFormatReaderGenerator
#else
internal delegate object XmlFormatClassReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString[] memberNames, XmlDictionaryString[] memberNamespaces);
internal delegate object XmlFormatCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString itemName, XmlDictionaryString itemNamespace, CollectionDataContract collectionContract);
internal delegate void XmlFormatGetOnlyCollectionReaderDelegate(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context, XmlDictionaryString itemName, XmlDictionaryString itemNamespace, CollectionDataContract collectionContract);
internal sealed class XmlFormatReaderGenerator
#endif
{
[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 XmlFormatReaderGenerator()
{
helper = new CriticalHelper();
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public XmlFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
{
try
{
if (TD.DCGenReaderStartIsEnabled())
{
TD.DCGenReaderStart("Class", classContract.UnderlyingType.FullName);
}
return helper.GenerateClassReader(classContract);
}
finally
{
if (TD.DCGenReaderStopIsEnabled())
{
TD.DCGenReaderStop();
}
}
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public XmlFormatCollectionReaderDelegate GenerateCollectionReader(CollectionDataContract collectionContract)
{
try
{
if (TD.DCGenReaderStartIsEnabled())
{
TD.DCGenReaderStart("Collection", collectionContract.UnderlyingType.FullName);
}
return helper.GenerateCollectionReader(collectionContract);
}
finally
{
if (TD.DCGenReaderStopIsEnabled())
{
TD.DCGenReaderStop();
}
}
}
[Fx.Tag.SecurityNote(Critical = "Accesses SecurityCritical helper class 'CriticalHelper'.")]
[SecurityCritical]
public XmlFormatGetOnlyCollectionReaderDelegate GenerateGetOnlyCollectionReader(CollectionDataContract collectionContract)
{
try
{
if (TD.DCGenReaderStartIsEnabled())
{
TD.DCGenReaderStart("GetOnlyCollection", collectionContract.UnderlyingType.FullName);
}
return helper.GenerateGetOnlyCollectionReader(collectionContract);
}
finally
{
if (TD.DCGenReaderStopIsEnabled())
{
TD.DCGenReaderStop();
}
}
}
[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 memberNamespacesArg;
ArgBuilder collectionContractArg;
public XmlFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
{
ilg = new CodeGenerator();
bool memberAccessFlag = classContract.RequiresMemberAccessForRead(null);
try
{
ilg.BeginMethod("Read" + classContract.StableName.Name + "FromXml", Globals.TypeOfXmlFormatClassReaderDelegate, 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);
LocalBuilder objectId = null;
if (HasFactoryMethod(classContract))
{
objectId = ilg.DeclareLocal(Globals.TypeOfString, "objectIdRead");
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetObjectIdMethod);
ilg.Stloc(objectId);
}
if (classContract.IsISerializable)
ReadISerializable(classContract);
else
ReadClass(classContract);
bool isFactoryType = InvokeFactoryMethod(classContract, objectId);
if (Globals.TypeOfIDeserializationCallback.IsAssignableFrom(classContract.UnderlyingType))
ilg.Call(objectLocal, XmlFormatGeneratorStatics.OnDeserializationMethod, null);
InvokeOnDeserialized(classContract);
if (objectId == null || !isFactoryType)
{
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 (XmlFormatClassReaderDelegate)ilg.EndMethod();
}
public XmlFormatCollectionReaderDelegate GenerateCollectionReader(CollectionDataContract collectionContract)
{
ilg = GenerateCollectionReaderHelper(collectionContract, false /*isGetOnlyCollection*/);
ReadCollection(collectionContract);
ilg.Load(objectLocal);
ilg.ConvertValue(objectLocal.LocalType, ilg.CurrentMethod.ReturnType);
return (XmlFormatCollectionReaderDelegate)ilg.EndMethod();
}
public XmlFormatGetOnlyCollectionReaderDelegate GenerateGetOnlyCollectionReader(CollectionDataContract collectionContract)
{
ilg = GenerateCollectionReaderHelper(collectionContract, true /*isGetOnlyCollection*/);
ReadGetOnlyCollection(collectionContract);
return (XmlFormatGetOnlyCollectionReaderDelegate)ilg.EndMethod();
}
CodeGenerator GenerateCollectionReaderHelper(CollectionDataContract collectionContract, bool isGetOnlyCollection)
{
ilg = new CodeGenerator();
bool memberAccessFlag = collectionContract.RequiresMemberAccessForRead(null);
try
{
if (isGetOnlyCollection)
{
ilg.BeginMethod("Read" + collectionContract.StableName.Name + "FromXml" + "IsGetOnly", Globals.TypeOfXmlFormatGetOnlyCollectionReaderDelegate, memberAccessFlag);
}
else
{
ilg.BeginMethod("Read" + collectionContract.StableName.Name + "FromXml" + string.Empty, Globals.TypeOfXmlFormatCollectionReaderDelegate, 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 InitArgs()
{
xmlReaderArg = ilg.GetArg(0);
contextArg = ilg.GetArg(1);
memberNamesArg = ilg.GetArg(2);
memberNamespacesArg = 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, XmlFormatGeneratorStatics.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, LocalBuilder objectId)
{
if (HasFactoryMethod(classContract))
{
ilg.Load(contextArg);
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, Globals.TypeOfIObjectReference);
ilg.Load(objectId);
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(XmlFormatGeneratorStatics.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);
LocalBuilder memberIndexLocal = ilg.DeclareLocal(Globals.TypeOfInt, "memberIndex", -1);
int firstRequiredMember;
bool[] requiredMembers = GetRequiredMembers(classContract, out firstRequiredMember);
bool hasRequiredMembers = (firstRequiredMember < memberCount);
LocalBuilder requiredIndexLocal = hasRequiredMembers ? ilg.DeclareLocal(Globals.TypeOfInt, "requiredIndex", firstRequiredMember) : null;
object forReadElements = ilg.For(null, null, null);
ilg.Call(null, XmlFormatGeneratorStatics.MoveToNextElementMethod, xmlReaderArg);
ilg.IfFalseBreak(forReadElements);
if (hasRequiredMembers)
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetMemberIndexWithRequiredMembersMethod, xmlReaderArg, memberNamesArg, memberNamespacesArg, memberIndexLocal, requiredIndexLocal, extensionDataLocal);
else
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetMemberIndexMethod, xmlReaderArg, memberNamesArg, memberNamespacesArg, memberIndexLocal, extensionDataLocal);
if (memberCount > 0)
{
Label[] memberLabels = ilg.Switch(memberCount);
ReadMembers(classContract, requiredMembers, memberLabels, memberIndexLocal, requiredIndexLocal);
ilg.EndSwitch();
}
else
{
ilg.Pop();
}
ilg.EndFor();
if (hasRequiredMembers)
{
ilg.If(requiredIndexLocal, Cmp.LessThan, memberCount);
ilg.Call(null, XmlFormatGeneratorStatics.ThrowRequiredMemberMissingExceptionMethod, xmlReaderArg, memberIndexLocal, requiredIndexLocal, memberNamesArg);
ilg.EndIf();
}
}
int ReadMembers(ClassDataContract classContract, bool[] requiredMembers, Label[] memberLabels, LocalBuilder memberIndexLocal, LocalBuilder requiredIndexLocal)
{
int memberCount = (classContract.BaseContract == null) ? 0 : ReadMembers(classContract.BaseContract, requiredMembers,
memberLabels, memberIndexLocal, requiredIndexLocal);
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);
if (dataMember.IsRequired)
{
int nextRequiredIndex = memberCount + 1;
for (; nextRequiredIndex < requiredMembers.Length; nextRequiredIndex++)
if (requiredMembers[nextRequiredIndex])
break;
ilg.Set(requiredIndexLocal, nextRequiredIndex);
}
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, classContract.StableName.Namespace);
}
else
{
value = ReadValue(memberType, dataMember.Name, classContract.StableName.Namespace);
ilg.LoadAddress(objectLocal);
ilg.ConvertAddress(objectLocal.LocalType, objectType);
ilg.Ldloc(value);
ilg.StoreMember(dataMember.MemberInfo);
}
ilg.Set(memberIndexLocal, memberCount);
ilg.EndCase();
}
return memberCount;
}
bool[] GetRequiredMembers(ClassDataContract contract, out int firstRequiredMember)
{
int memberCount = contract.MemberNames.Length;
bool[] requiredMembers = new bool[memberCount];
GetRequiredMembers(contract, requiredMembers);
for (firstRequiredMember = 0; firstRequiredMember < memberCount; firstRequiredMember++)
if (requiredMembers[firstRequiredMember])
break;
return requiredMembers;
}
int GetRequiredMembers(ClassDataContract contract, bool[] requiredMembers)
{
int memberCount = (contract.BaseContract == null) ? 0 : GetRequiredMembers(contract.BaseContract, requiredMembers);
List<DataMember> members = contract.Members;
for (int i = 0; i < members.Count; i++, memberCount++)
{
requiredMembers[memberCount] = members[i].IsRequired;
}
return memberCount;
}
void ReadISerializable(ClassDataContract classContract)
{
ConstructorInfo ctor = classContract.GetISerializableConstructor();
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, string ns)
{
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, ns);
}
// Deserialize ref
ilg.Else();
if (type.IsValueType)
ThrowValidationException(SR.GetString(SR.ValueTypeCannotHaveRef, DataContract.GetClrTypeFullName(type)));
else
{
ilg.Call(contextArg, XmlFormatGeneratorStatics.GetExistingObjectMethod, objectId, type, name, ns);
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, ns);
}
return value;
}
void InternalDeserialize(LocalBuilder value, Type type, string name, string ns)
{
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);
ilg.Load(ns);
ilg.Call(XmlFormatGeneratorStatics.InternalDeserializeMethod);
if (type.IsPointer)
ilg.Call(XmlFormatGeneratorStatics.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, null, Globals.EmptyTypeArray, null);
break;
case CollectionKind.Dictionary:
type = Globals.TypeOfHashtable;
constructor = XmlFormatGeneratorStatics.HashtableCtor;
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;
}
}
string itemName = collectionContract.ItemName;
string itemNs = collectionContract.StableName.Namespace;
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(type, 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);
IsStartElement(memberNamesArg, memberNamespacesArg);
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, 1);
LocalBuilder value = ReadCollectionItem(collectionContract, itemType, itemName, itemNs);
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);
IsStartElement(memberNamesArg, memberNamespacesArg);
ilg.If();
LocalBuilder itemValue = ReadCollectionItem(collectionContract, itemType, itemName, itemNs);
if (isArray)
ilg.StoreArrayElement(objectLocal, j, itemValue);
else
StoreCollectionValue(objectLocal, itemValue, collectionContract);
ilg.Else();
HandleUnexpectedItemInCollection(j);
ilg.EndIf();
ilg.EndFor();
ilg.Call(contextArg, XmlFormatGeneratorStatics.CheckEndOfArrayMethod, xmlReaderArg, size, memberNamesArg, memberNamespacesArg);
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);
string itemName = collectionContract.ItemName;
string itemNs = collectionContract.StableName.Namespace;
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, memberNamespacesArg);
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);
}
ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, objectLocal);
LocalBuilder i = ilg.DeclareLocal(Globals.TypeOfInt, "i");
object forLoop = ilg.For(i, 0, Int32.MaxValue);
IsStartElement(memberNamesArg, memberNamespacesArg);
ilg.If();
ilg.Call(contextArg, XmlFormatGeneratorStatics.IncrementItemCountMethod, 1);
LocalBuilder value = ReadCollectionItem(collectionContract, itemType, itemName, itemNs);
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, memberNamespacesArg);
ilg.EndIf();
ilg.EndIf();
}
bool TryReadPrimitiveArray(Type type, 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.DateTime:
readArrayMethod = "TryReadDateTimeArray";
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;
default:
break;
}
if (readArrayMethod != null)
{
ilg.Load(xmlReaderArg);
ilg.Load(contextArg);
ilg.Load(memberNamesArg);
ilg.Load(memberNamespacesArg);
ilg.Load(size);
ilg.Ldloca(objectLocal);
ilg.Call(typeof(XmlReaderDelegator).GetMethod(readArrayMethod, Globals.ScanAllMembers));
return true;
}
return false;
}
LocalBuilder ReadCollectionItem(CollectionDataContract collectionContract, Type itemType, string itemName, string itemNs)
{
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(XmlFormatGeneratorStatics.GetItemContractMethod);
ilg.Load(xmlReaderArg);
ilg.Load(contextArg);
ilg.Call(XmlFormatGeneratorStatics.ReadXmlValueMethod);
ilg.ConvertValue(Globals.TypeOfObject, itemType);
ilg.Stloc(value);
return value;
}
else
{
return ReadValue(itemType, itemName, itemNs);
}
}
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, XmlFormatGeneratorStatics.IsStartElementMethod2, nameArg, nsArg);
}
void IsStartElement()
{
ilg.Call(xmlReaderArg, XmlFormatGeneratorStatics.IsStartElementMethod0);
}
void IsEndElement()
{
ilg.Load(xmlReaderArg);
ilg.LoadMember(XmlFormatGeneratorStatics.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(XmlFormatGeneratorStatics.SerializationExceptionCtor);
ilg.Throw();
}
}
[Fx.Tag.SecurityNote(Critical = "Elevates by calling GetUninitializedObject which has a LinkDemand.",
Safe = "Marked as such so that it's callable from transparent generated IL. Takes id as parameter which "
+ " is guaranteed to be in internal serialization cache.")]
[SecuritySafeCritical]
#if USE_REFEMIT
public static object UnsafeGetUninitializedObject(int id)
#else
static internal object UnsafeGetUninitializedObject(int id)
#endif
{
return FormatterServices.GetUninitializedObject(DataContract.GetDataContractForInitialization(id).TypeForInitialization);
}
}
}
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