private void OverrideGetObjectData(MutableType proxyType, Tuple <string, FieldInfo>[] serializedFieldMapping)
{
try
{
proxyType
.GetOrAddImplementation(s_getObjectDataMethod)
.SetBody(
ctx => Expression.Block(
typeof(void),
new[] { ctx.PreviousBody }.Concat(BuildFieldSerializationExpressions(ctx.This, ctx.Parameters[0], serializedFieldMapping))));
}
catch (NotSupportedException)
{
// Overriding and re-implementation failed because the base implementation is not accessible from the proxy.
// Do nothing here; error reporting code will be generated in the ProxySerializationEnabler.
// Add an explicit re-implementation that throws exception (instead of simply throwing an exception here).
// Reasoning: Users often cannot influence the requested type and do not care about any serialization problem.
proxyType.AddInterface(typeof(ISerializable), throwIfAlreadyImplemented: false);
var message = "The requested type implements ISerializable but GetObjectData is not accessible from the proxy. "
+ "Make sure that GetObjectData is implemented implicitly (not explicitly).";
proxyType.AddExplicitOverride(
s_getObjectDataMethod,
ctx => Expression.Throw(Expression.New(s_serializationExceptionConstructor, Expression.Constant(message))));
}
}
private void OverrideOnDeserialization(MutableType proxyType, MethodInfo initializationMethod)
{
try
{
proxyType.GetOrAddImplementation(s_onDeserializationMethod)
.SetBody(
ctx => Expression.Block(
typeof(void),
ctx.PreviousBody,
CallInitializationMethod(ctx.This, initializationMethod)));
}
catch (NotSupportedException)
{
// Overriding and re-implementation failed because the base implementation is not accessible from the proxy.
// Add an explicit re-implementation that throws exception (instead of simply throwing an exception here).
// Reasoning: Users often cannot influence the requested type and do not care about any serialization problem.
proxyType.AddInterface(typeof(IDeserializationCallback), throwIfAlreadyImplemented: false);
var message = "The requested type implements IDeserializationCallback but OnDeserialization is not accessible from the proxy. "
+ "Make sure that OnDeserialization is implemented implicitly (not explicitly).";
proxyType.AddExplicitOverride(
s_onDeserializationMethod,
ctx => Expression.Throw(Expression.New(s_serializationExceptionConstructor, Expression.Constant(message))));
}
}
public void MakeSerializable(
MutableType proxyType,
string participantConfigurationID,
IAssembledTypeIdentifierProvider assembledTypeIdentifierProvider,
AssembledTypeID typeID)
{
ArgumentUtility.CheckNotNull("proxyType", proxyType);
ArgumentUtility.CheckNotNullOrEmpty("participantConfigurationID", participantConfigurationID);
ArgumentUtility.CheckNotNull("assembledTypeIdentifierProvider", assembledTypeIdentifierProvider);
if (!proxyType.IsTypePipeSerializable())
{
return;
}
var assembledTypeIDData = assembledTypeIdentifierProvider.GetAssembledTypeIDDataExpression(typeID);
if (typeof(ISerializable).IsTypePipeAssignableFrom(proxyType))
{
// If the mutable type already implements ISerializable, we only need to extend the implementation to include the metadata required for
// deserialization. Existing fields will be serialized by the base ISerialization implementation. Added fields will be serialized by
// the TypePipe (ProxySerializationEnabler).
try
{
proxyType
.GetOrAddImplementation(s_getObjectDataMethod)
.SetBody(
ctx => Expression.Block(
ctx.PreviousBody,
CreateMetaDataSerializationExpression(
ctx.Parameters[0], typeof(ObjectWithDeserializationConstructorProxy), participantConfigurationID, assembledTypeIDData)));
}
catch (NotSupportedException)
{
// Overriding and re-implementation failed because the base implementation of GetObjectData is not accessible from the proxy.
// Do nothing here; error reporting code will be generated in the ProxySerializationEnabler.
// Reasoning: Users often cannot influence the requested type and do not care about any serialization problem.
}
}
else
{
// If the mutable type does not implement ISerializable, we need to add the interface and then also serialize all the fields on the object.
// We cannot add a deserialization constructor because there is no base constructor that we could call. Therefore, ProxySerializationEnabler
// cannot take care of serializing the added fields, and we thus have to serialize both existing and added fields ourselves via
// ReflectionSerializationHelper.AddFieldValues.
proxyType.AddInterface(typeof(ISerializable));
proxyType.AddExplicitOverride(
s_getObjectDataMethod,
ctx => Expression.Block(
CreateMetaDataSerializationExpression(
ctx.Parameters[0], typeof(ObjectWithoutDeserializationConstructorProxy), participantConfigurationID, assembledTypeIDData),
Expression.Call(s_addFieldValuesMethod, ctx.Parameters[0], ctx.This)));
}
}
private MutableMethodInfo ImplementIntroducedMethod(
Expression implementer, MethodInfo interfaceMethod, MethodDefinition implementingMethod, MemberVisibility visibility)
{
var method = visibility == MemberVisibility.Public
? _concreteTarget.GetOrAddImplementation(interfaceMethod)
: _concreteTarget.AddExplicitOverride(interfaceMethod, ctx => Expression.Default(ctx.ReturnType));
method.SetBody(ctx => _expressionBuilder.CreateInitializingDelegation(ctx, _initializationMethod, implementer, interfaceMethod));
_attributeGenerator.AddIntroducedMemberAttribute(method, interfaceMethod, implementingMethod);
_attributeGenerator.ReplicateAttributes(implementingMethod, method);
return(method);
}