public DataView(IHostEnvironment env, ArrayDataViewBuilder builder, int rowCount)
{
Contracts.AssertValue(env, "env");
_host = env.Register("ArrayDataView");
_host.AssertValue(builder);
_host.Assert(rowCount >= 0);
_host.Assert(builder._names.Count == builder._columns.Count);
_columns = builder._columns.ToArray();
var schemaCols = new Schema.Column[_columns.Length];
for (int i = 0; i < schemaCols.Length; i++)
{
var meta = new Schema.Metadata.Builder();
if (builder._getSlotNames.TryGetValue(builder._names[i], out var slotNamesGetter))
{
meta.AddSlotNames(_columns[i].Type.VectorSize, slotNamesGetter);
}
if (builder._getKeyValues.TryGetValue(builder._names[i], out var keyValueGetter))
{
meta.AddKeyValues(_columns[i].Type.KeyCount, TextType.Instance, keyValueGetter);
}
schemaCols[i] = new Schema.Column(builder._names[i], _columns[i].Type, meta.GetMetadata());
}
_schema = new Schema(schemaCols);
_rowCount = rowCount;
}
private void AddMetadata(int iinfo, Schema.Metadata.Builder builder)
{
builder.Add(InputSchema[_parent.ColumnPairs[iinfo].input].Metadata, name => name == MetadataUtils.Kinds.SlotNames);
ValueGetter <VBuffer <ReadOnlyMemory <char> > > getter =
(ref VBuffer <ReadOnlyMemory <char> > dst) =>
{
GetKeyValues(iinfo, ref dst);
};
builder.AddKeyValues(CharsCount, TextType.Instance, getter);
}
