internal override DbExpression AsCqt(DbExpression row, MemberPath outputMember)
{
Debug.Assert(outputMember.LeafEdmMember != null, "Constant can't correspond to an empty member path.");
TypeUsage modelTypeUsage = Helper.GetModelTypeUsage(outputMember.LeafEdmMember);
return(modelTypeUsage.Constant(m_scalar));
}
private DbExpression GenerateValueExpression(
EdmProperty property,
PropagatorResult value)
{
if (value.IsNull)
{
return((DbExpression)Helper.GetModelTypeUsage((EdmMember)property).Null());
}
object obj = this.m_translator.KeyManager.GetPrincipalValue(value);
if (Convert.IsDBNull(obj))
{
return((DbExpression)Helper.GetModelTypeUsage((EdmMember)property).Null());
}
TypeUsage modelTypeUsage = Helper.GetModelTypeUsage((EdmMember)property);
Type type = obj.GetType();
if (type.IsEnum())
{
obj = Convert.ChangeType(obj, type.GetEnumUnderlyingType(), (IFormatProvider)CultureInfo.InvariantCulture);
}
Type clrEquivalentType = ((PrimitiveType)modelTypeUsage.EdmType).ClrEquivalentType;
if (type != clrEquivalentType)
{
obj = Convert.ChangeType(obj, clrEquivalentType, (IFormatProvider)CultureInfo.InvariantCulture);
}
return((DbExpression)modelTypeUsage.Constant(obj));
}