FrameColumnReader (druid-processing 30.0.1 API)

All Known Implementing Classes:

ComplexFrameColumnReader, DoubleArrayFrameColumnReader, DoubleFrameColumnReader, FloatArrayFrameColumnReader, FloatFrameColumnReader, LongArrayFrameColumnReader, LongFrameColumnReader, NumericArrayFrameColumnReader, StringFrameColumnReader, UnsupportedColumnTypeFrameColumnReader
```
public interface FrameColumnReader
```
Embeds the logic to read a specific column from frames with a specific RowSignature. Stateless and immutable, so it can be shared between multiple frame readers as long as all frames have the same signature.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ColumnPlus`	`readColumn(Frame frame)`	Returns a column reference for the provided frame.
`Column`	`readRACColumn(Frame frame)`	Returns a `Column` from the frame.

- Method Detail
  - readRACColumn
```
Column readRACColumn(Frame frame)
```
    Returns a Column from the frame.
  - readColumn
```
ColumnPlus readColumn(Frame frame)
```
    Returns a column reference for the provided frame.