public static bool IsStampNeeded(TypeDescriptor type, bool treatCollectionAsUserObject)
{
return(!Helpers.IsWriteableByPrimitiveWriter(type.UnderlyingType) && (!CollectionMetaToken.IsCollection(type) || treatCollectionAsUserObject));
}
private void GenerateWriteCollection(CollectionMetaToken token)
{
Type enumerableType;
Type enumeratorType;
if(token.IsDictionary)
{
enumerableType = typeof(IDictionary);
enumeratorType = typeof(IDictionaryEnumerator);
}
else
{
var genericTypes = new [] { token.FormalElementType };
enumerableType = token.IsGenericallyIterable ? typeof(IEnumerable<>).MakeGenericType(genericTypes) : typeof(IEnumerable);
enumeratorType = token.IsGenericallyIterable ? typeof(IEnumerator<>).MakeGenericType(genericTypes) : typeof(IEnumerator);
}
generator.DeclareLocal(enumeratorType); // iterator
if(token.IsDictionary)
{
generator.DeclareLocal(token.FormalKeyType);
generator.DeclareLocal(token.FormalValueType);
}
else
{
generator.DeclareLocal(token.FormalElementType);
}
// length of the collection
generator.Emit(OpCodes.Ldarg_1); // primitiveWriter
generator.Emit(OpCodes.Ldarg_2); // collection to serialize
if(token.CountMethod.IsStatic)
{
generator.Emit(OpCodes.Call, token.CountMethod);
}
else
{
generator.Emit(OpCodes.Callvirt, token.CountMethod);
}
generator.Emit(OpCodes.Call, primitiveWriterWriteInteger);
// elements
var getEnumeratorMethod = enumerableType.GetMethod("GetEnumerator");
generator.Emit(OpCodes.Ldarg_2); // collection to serialize
generator.Emit(OpCodes.Call, getEnumeratorMethod);
generator.Emit(OpCodes.Stloc_0);
var loopBegin = generator.DefineLabel();
generator.MarkLabel(loopBegin);
generator.Emit(OpCodes.Ldloc_0);
var finish = generator.DefineLabel();
generator.Emit(OpCodes.Call, Helpers.GetMethodInfo<IEnumerator>(x => x.MoveNext()));
generator.Emit(OpCodes.Brfalse, finish);
generator.Emit(OpCodes.Ldloc_0);
if(token.IsDictionary)
{
// key
generator.Emit(OpCodes.Nop);
generator.Emit(OpCodes.Call, enumeratorType.GetProperty("Key").GetGetMethod());
generator.Emit(OpCodes.Unbox_Any, token.FormalKeyType);
generator.Emit(OpCodes.Stloc_1);
GenerateWriteType(gen => gen.Emit(OpCodes.Ldloc_1), token.FormalKeyType);
// value
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Call, enumeratorType.GetProperty("Value").GetGetMethod());
generator.Emit(OpCodes.Unbox_Any, token.FormalValueType);
generator.Emit(OpCodes.Stloc_2);
GenerateWriteType(gen => gen.Emit(OpCodes.Ldloc_2), token.FormalValueType);
}
else
{
generator.Emit(OpCodes.Call, enumeratorType.GetProperty("Current").GetGetMethod());
generator.Emit(OpCodes.Stloc_1);
// operation on current element
GenerateWriteTypeLocal1(token.FormalElementType);
}
generator.Emit(OpCodes.Br, loopBegin);
generator.MarkLabel(finish);
}
private static void GenerateWriteEnumerable(WriterGenerationContext context, Variable valueLocal, CollectionMetaToken token)
{
var genericTypes = new[] { token.FormalElementType };
var enumerableType = token.IsGeneric ? typeof(IEnumerable <>).MakeGenericType(genericTypes) : typeof(IEnumerable);
var enumeratorType = token.IsGeneric ? typeof(IEnumerator <>).MakeGenericType(genericTypes) : typeof(IEnumerator);
var iteratorLocal = context.Generator.DeclareLocal(enumeratorType);
var currentElementLocal = context.Generator.DeclareLocal(token.FormalElementType);
var elementVariable = new Variable(currentElementLocal);
var loopBegin = context.Generator.DefineLabel();
var finish = context.Generator.DefineLabel();
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(token.CountMethod.IsStatic ? OpCodes.Call : OpCodes.Callvirt, token.CountMethod);
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
var getEnumeratorMethod = enumerableType.GetMethod("GetEnumerator");
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Call, getEnumeratorMethod);
context.Generator.StoreLocalValueFromStack(iteratorLocal);
context.Generator.MarkLabel(loopBegin);
context.Generator.PushLocalValueOntoStack(iteratorLocal);
context.Generator.Call <IEnumerator>(x => x.MoveNext());
context.Generator.Emit(OpCodes.Brfalse, finish);
context.Generator.PushLocalValueOntoStack(iteratorLocal);
context.Generator.Emit(OpCodes.Call, enumeratorType.GetProperty("Current").GetGetMethod());
context.Generator.StoreLocalValueFromStack(currentElementLocal);
GenerateWriteField(context, elementVariable, token.FormalElementType);
context.Generator.Emit(OpCodes.Br, loopBegin);
context.Generator.MarkLabel(finish);
}