protected DataViewBase(IHostEnvironment env, string name, InternalSchemaDefinition schemaDefn)
{
Contracts.AssertValue(env);
env.AssertNonWhiteSpace(name);
Host = env.Register(name);
Host.AssertValue(schemaDefn);
_schemaDefn = schemaDefn;
_schema = SchemaBuilder.MakeSchema(GetSchemaColumns(schemaDefn));
int n = schemaDefn.Columns.Length;
_peeks = new Delegate[n];
for (var i = 0; i < n; i++)
{
var currentColumn = schemaDefn.Columns[i];
_peeks[i] = currentColumn.IsComputed
? currentColumn.Generator
: ApiUtils.GeneratePeek <DataViewBase <TRow>, TRow>(currentColumn);
}
}