/// <summary>
/// Returns a CacheableResultTransformer that is used to transform
/// tuples to a value(s) that can be cached.
/// </summary>
/// <param name="transformer">a tuple subset result transformer;
/// must be non-null;</param>
/// <param name="aliases">the aliases that correspond to the tuple;
/// if it is non-null, its length must equal the number
/// of true elements in includeInTuple[]</param>
/// <param name="includeInTuple">array with the i-th element indicating
/// whether the i-th expression returned by a query is
/// included in the tuple; the number of true values equals
/// the length of the tuple that will be transformed;
/// must be non-null</param>
/// <returns>a CacheableResultTransformer that is used to transform
/// tuples to a value(s) that can be cached.</returns>
private static CacheableResultTransformer Create(ITupleSubsetResultTransformer transformer,
string[] aliases,
bool[] includeInTuple)
{
if (transformer == null)
{
throw new ArgumentNullException("transformer");
}
int tupleLength = ArrayHelper.CountTrue(includeInTuple);
if (aliases != null && aliases.Length != tupleLength)
{
throw new ArgumentException(
"If aliases is not null, then the length of aliases[] must equal the number of true elements in includeInTuple; " +
"aliases.length=" + aliases.Length + "tupleLength=" + tupleLength
);
}
return(new CacheableResultTransformer(
includeInTuple,
transformer.IncludeInTransform(aliases, tupleLength)
));
}
public CacheableAliasToBeenResultTransformer(ITupleSubsetResultTransformer baseTransformer, string[] aliases)
{
this.baseTransformer = baseTransformer;
this.aliases = aliases;
}
