public static Func <IQueryable, IQueryable> BuildSelectFunc(Type elementType, List <String> selectClauses)
{
var propSigs = selectClauses.Select(sc => new PropertySignature(elementType, sc)).ToList();
var dti = DynamicTypeInfo.FindOrCreate(propSigs.Select(ps => ps.Name), propSigs.Select(ps => ps.ReturnType));
var lambdaExpr = CreateNewLambda(dti, propSigs);
var method = TypeFns.GetMethodByExample((IQueryable <String> q) => q.Select(s => s.Length), elementType, dti.DynamicType);
var func = BuildIQueryableFunc(elementType, method, lambdaExpr);
return(func);
}
public static IQueryable ApplySelect(IQueryable source, Type elementType, SelectClause selectClause)
{
var propSigs = selectClause.Properties;
var dti = DynamicTypeInfo.FindOrCreate(propSigs.Select(ps => ps.Name), propSigs.Select(ps => ps.ReturnType));
var lambdaExpr = CreateNewLambda(dti, propSigs);
var method = TypeFns.GetMethodByExample((IQueryable <String> q) => q.Select(s => s.Length), elementType, dti.DynamicType);
var func = BuildIQueryableFunc(elementType, method, lambdaExpr);
return(func(source));
}
