internal static TypeUsage ValidateCreateRef(
EntitySet entitySet,
EntityType entityType,
IEnumerable <DbExpression> keyValues,
out DbExpression keyConstructor)
{
ArgumentValidation.CheckEntitySet((EntitySetBase)entitySet, nameof(entitySet));
ArgumentValidation.CheckType((EdmType)entityType, nameof(entityType));
if (!TypeSemantics.IsValidPolymorphicCast((EdmType)entitySet.ElementType, (EdmType)entityType))
{
throw new ArgumentException(Strings.Cqt_Ref_PolymorphicArgRequired);
}
IList <EdmMember> keyMembers = (IList <EdmMember>)entityType.KeyMembers;
EnumerableValidator <DbExpression, KeyValuePair <string, DbExpression>, List <KeyValuePair <string, DbExpression> > > validator = ArgumentValidation.CreateValidator <DbExpression, KeyValuePair <string, DbExpression>, List <KeyValuePair <string, DbExpression> > >(keyValues, nameof(keyValues), (Func <DbExpression, int, KeyValuePair <string, DbExpression> >)((valueExp, idx) =>
{
ArgumentValidation.RequireCompatibleType(valueExp, keyMembers[idx].TypeUsage, nameof(keyValues), idx);
return(new KeyValuePair <string, DbExpression>(keyMembers[idx].Name, valueExp));
}), (Func <List <KeyValuePair <string, DbExpression> >, List <KeyValuePair <string, DbExpression> > >)(columnList => columnList));
validator.ExpectedElementCount = keyMembers.Count;
List <KeyValuePair <string, DbExpression> > keyValuePairList = validator.Validate();
keyConstructor = (DbExpression)DbExpressionBuilder.NewRow((IEnumerable <KeyValuePair <string, DbExpression> >)keyValuePairList);
return(ArgumentValidation.CreateReferenceResultType((EntityTypeBase)entityType));
}
internal static TypeUsage ValidateRefFromKey(
EntitySet entitySet,
DbExpression keyValues,
EntityType entityType)
{
ArgumentValidation.CheckEntitySet((EntitySetBase)entitySet, nameof(entitySet));
ArgumentValidation.CheckType((EdmType)entityType);
if (!TypeSemantics.IsValidPolymorphicCast((EdmType)entitySet.ElementType, (EdmType)entityType))
{
throw new ArgumentException(Strings.Cqt_Ref_PolymorphicArgRequired);
}
TypeUsage resultType = ArgumentValidation.CreateResultType((EdmType)TypeHelpers.CreateKeyRowType((EntityTypeBase)entitySet.ElementType));
ArgumentValidation.RequireCompatibleType(keyValues, resultType, nameof(keyValues));
return(ArgumentValidation.CreateReferenceResultType((EntityTypeBase)entityType));
}
internal DbTreatExpression(TypeUsage asType, DbExpression argument)
: base(DbExpressionKind.Treat, asType, argument)
{
Debug.Assert(TypeSemantics.IsValidPolymorphicCast(argument.ResultType, asType), "DbTreatExpression represents an invalid treat");
}