protected override void GetMetadataCore <TValue>(string kind, int col, ref TValue value)
{
Ectx.Assert(0 <= col && col < ColumnCount);
if (kind == OpType)
{
_opTypeGetters[col].Marshal(col, ref value);
}
else if (kind == InputOps && _inputOpsGetters[col] != null)
{
_inputOpsGetters[col].Marshal(col, ref value);
}
else
{
throw Ectx.ExceptGetMetadata();
}
}
public SimpleSchema(IExceptionContext ectx, KeyValuePair <string, ColumnType>[] columns,
Dictionary <string, MetadataUtils.MetadataGetter <VBuffer <ReadOnlyMemory <char> > > > keyValues)
: this(ectx, columns)
{
foreach (var kvp in keyValues)
{
var name = kvp.Key;
var getter = kvp.Value;
if (!ColumnNameMap.TryGetValue(name, out int col))
{
throw Ectx.ExceptParam(nameof(keyValues), $"Output schema does not contain column '{name}'");
}
if (!Types[col].ItemType.IsKey)
{
throw Ectx.ExceptParam(nameof(keyValues), $"Column '{name}' is not a key column, so it cannot have key value metadata");
}
_keyValueGetters[col] = getter;
}
}
