public bool CanMap(Type from, Type to)
{
return
(
MapperUtils.IsNullable(to) && MapperUtils.IsNullable(from) &&
_mapper.CanMap(from.GetGenericArguments()[0], to.GetGenericArguments()[0])
);
}
public void Compile(CompilationContext context)
{
if (!(value is IAstRef) && !MapperUtils.IsNullable(value.itemType))
{
context.Emit(OpCodes.Ldc_I4_1);
}
else if (MapperUtils.IsNullable(value.itemType))
{
AstBuildHelper.ReadPropertyRV(
new AstValueToAddr((IAstValue)value),
value.itemType.GetProperty("HasValue")
).Compile(context);
context.Emit(OpCodes.Ldc_I4_0);
context.Emit(OpCodes.Ceq);
}
else
{
value.Compile(context);
new AstConstantNull().Compile(context);
context.Emit(OpCodes.Ceq);
}
}
public void Compile(CompilationContext context)
{
if (MapperUtils.IsNullable(objectType))
{
IAstRefOrValue underlyingValue;
var underlyingType = Nullable.GetUnderlyingType(objectType);
if (ConstructorParams == null || ConstructorParams.Length == 0)
{
LocalBuilder temp = context.ilGenerator.DeclareLocal(underlyingType);
new AstInitializeLocalVariable(temp).Compile(context);
underlyingValue = AstBuildHelper.ReadLocalRV(temp);
}
else
{
underlyingValue = (IAstValue)ConstructorParams[0];
}
ConstructorInfo constructor = objectType.GetConstructor(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance,
null,
new[] { underlyingType },
null);
underlyingValue.Compile(context);
context.EmitNewObject(constructor);
}
else
{
Type[] types;
if (ConstructorParams == null || ConstructorParams.Length == 0)
{
types = new Type[0];
}
else
{
types = ConstructorParams.Select(c => c.itemType).ToArray();
foreach (var p in ConstructorParams)
{
p.Compile(context);
}
}
ConstructorInfo ci = objectType.GetConstructor(types);
if (ci != null)
{
context.EmitNewObject(ci);
}
else if (objectType.IsValueType)
{
LocalBuilder temp = context.ilGenerator.DeclareLocal(objectType);
new AstInitializeLocalVariable(temp).Compile(context);
AstBuildHelper.ReadLocalRV(temp).Compile(context);
}
else
{
throw new Exception(
String.Format("Constructor not found in {0}", objectType.FullName)
);
}
}
}
