/// <summary>
/// Flattens a SetOpVar (used in SetOps). Simply produces a list of
/// properties corresponding to each desired property
/// </summary>
/// <param name="v"></param>
/// <returns></returns>
private VarInfo FlattenSetOpVar(SetOpVar v)
{
if (TypeUtils.IsCollectionType(v.Type))
{
md.TypeUsage newType = GetNewType(v.Type);
Var newVar = m_command.CreateSetOpVar(newType);
return m_varInfoMap.CreateCollectionVarInfo(v, newVar);
}
else if (md.TypeSemantics.IsEnumerationType(v.Type) || md.TypeSemantics.IsStrongSpatialType(v.Type))
{
md.TypeUsage newType = GetNewType(v.Type);
Var newVar = m_command.CreateSetOpVar(newType);
return m_varInfoMap.CreatePrimitiveTypeVarInfo(v, newVar);
}
// Get the "new" type for the Var
TypeInfo typeInfo = m_typeInfo.GetTypeInfo(v.Type);
// Get a list of properties that we think are necessary
PropertyRefList desiredProperties = m_varPropertyMap[v];
List<Var> newVars = new List<Var>();
List<md.EdmProperty> newProps = new List<md.EdmProperty>();
bool hasNullSentinelVar = false;
foreach (PropertyRef p in typeInfo.PropertyRefList)
{
if (!desiredProperties.Contains(p))
{
continue;
}
md.EdmProperty newProperty = typeInfo.GetNewProperty(p);
newProps.Add(newProperty);
SetOpVar newVar = m_command.CreateSetOpVar(md.Helper.GetModelTypeUsage(newProperty));
newVars.Add(newVar);
// Check if it is a null sentinel var
if (!hasNullSentinelVar && IsNullSentinelPropertyRef(p))
{
hasNullSentinelVar = true;
}
}
VarInfo varInfo = m_varInfoMap.CreateStructuredVarInfo(v, typeInfo.FlattenedType, newVars, newProps, hasNullSentinelVar);
return varInfo;
}
/// <summary>
/// Creates a SetOp Var of
/// </summary>
/// <param name="type">Datatype of the Var</param>
/// <returns>A new SetOp Var with the specified result type</returns>
internal SetOpVar CreateSetOpVar(TypeUsage type)
{
SetOpVar v = new SetOpVar(NewVarId(), type);
m_vars.Add(v);
return v;
}