public virtual void Compile(ModuleBuilder builder)
{
if (_converter != null)
{
_converter.Compile(builder);
}
else
{
Type sourceType = SourceType;
Type targetType = TargetMember.MemberType;
_converter = _container.Converters.Get(sourceType, targetType);
if (_converter == null && (_options & MemberMapOptions.Hierarchy) == MemberMapOptions.Hierarchy &&
!(TargetMember.MemberType.IsValueType && targetType == sourceType))
{
var key = new TypeMapperKey(_container, sourceType, targetType);
_genericMapperTypes.GetOrAdd(key, k => CreateMapper(builder, k.SourceType, k.TargetType));
}
}
}
public virtual void Emit(CompilationContext context)
{
Type sourceType = SourceType;
Type targetType = TargetMember.MemberType;
if (_converter != null)
{
EmitSource(context);
_converter.Emit(sourceType, targetType, context);
EmitSetTarget(context);
return;
}
if ((_options & MemberMapOptions.Hierarchy) != MemberMapOptions.Hierarchy)
{
Action <CompilationContext> converter = GetConvertEmitter(sourceType, targetType);
if (converter != null)
{
EmitSource(context);
converter(context);
EmitSetTarget(context);
}
}
else
{
var key = new TypeMapperKey(_container, sourceType, targetType);
Type mapperType = _genericMapperTypes[key];
if (targetType.IsClass && !targetType.IsNullable())
{
LocalBuilder sourceValue = context.DeclareLocal(sourceType);
EmitSource(context);
context.Emit(OpCodes.Stloc, sourceValue);
LocalBuilder targetValue = context.DeclareLocal(targetType);
((IMemberBuilder)TargetMember).EmitGetter(context);
context.Emit(OpCodes.Stloc, targetValue);
Label label = context.DefineLabel();
context.Emit(OpCodes.Ldloc, targetValue);
context.Emit(OpCodes.Brtrue, label);
context.Emit(OpCodes.Ldloc, sourceValue);
context.CurrentType = sourceType;
context.EmitCall(mapperType.GetMethod("Convert"));
EmitSetTarget(context);
Label finalLabel = context.DefineLabel();
context.Emit(OpCodes.Br, finalLabel);
context.MakeLabel(label);
context.Emit(OpCodes.Ldloc, sourceValue);
context.Emit(OpCodes.Ldloc, targetValue);
context.EmitCall(mapperType.GetMethod("Map"));
context.MakeLabel(finalLabel);
}
else
{
EmitSource(context);
context.CurrentType = sourceType;
context.EmitCall(mapperType.GetMethod("Convert"));
EmitSetTarget(context);
}
}
}