ReadableFieldPointer (druid-processing 30.0.1 API)

All Known Implementing Classes:

RowMemoryFieldPointer, SettableFieldPointer
```
public interface ReadableFieldPointer
```
Pointer to a field position in some memory. 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. Never necessary to read a field, since all fields can be read without knowing their entire length. Provided because it may be useful for reading in a more optimal manner.