/// <summary>
/// Resolve the given <paramref name="criteria"/> into a
/// <see cref="IDataReaderMapper{T}"/> object.
/// </summary>
public static IDataReaderMapper <T> Resolve <T>(this ICriteria criteria,
string prefix)
{
object obj;
string hash = prefix + ":" + criteria.Fields.Join(":");
if (mappers_.TryGetValue(hash, out obj))
{
return((IDataReaderMapper <T>)obj);
}
var builder = new DataReaderMapperBuilder <T>();
foreach (var field in criteria.Fields)
{
string map = criteria.GetFieldMap(field);
builder.Map(field, map);
}
IDataReaderMapper <T> mapper = builder.Build();
mappers_.Add(hash, mapper);
return(mapper);
}