ReadableFieldPointer (druid-processing 28.0.0 API)

All Known Implementing Classes:

RowMemoryFieldPointer, SettableFieldPointer
```
public interface ReadableFieldPointer
```
Pointer to a field position in some memory. Only points to the beginning of the field, since all fields can be read without knowing their entire length. See RowBasedFrameWriter for details about the format.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  long length()
  Length of the field.
  
  long position()
  Starting position of the field.

- Method Detail
  - position
```
long position()
```
    Starting position of the field.
  - length
```
long length()
```
    Length of the field.