RowMemoryFieldPointer (druid-processing 30.0.1 API)

java.lang.Object
- org.apache.druid.frame.field.RowMemoryFieldPointer

All Implemented Interfaces:

ReadableFieldPointer
```
public class RowMemoryFieldPointer
extends Object
implements ReadableFieldPointer
```
A ReadableFieldPointer that is derived from a row-based frame. Returns the position and the length of a field at a particular position for the row that the rowPointer is pointing to at the time. It caches the values of the position and the length based on position of the rowPointer. This method is not thread-safe

Constructor Summary

Constructors
Constructor	Description
`RowMemoryFieldPointer(org.apache.datasketches.memory.Memory memory, ReadableFrameRowPointer rowPointer, int fieldNumber, int fieldCount)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

long length()
Length of the field.

long position()
Starting position of the field.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RowMemoryFieldPointer
```
public RowMemoryFieldPointer(org.apache.datasketches.memory.Memory memory,
                             ReadableFrameRowPointer rowPointer,
                             int fieldNumber,
                             int fieldCount)
```
- Method Detail
  - position
```
public long position()
```
    Description copied from interface: ReadableFieldPointer
    
    Starting position of the field.
    
    Specified by:
    
    position in interface ReadableFieldPointer
  - length
```
public long length()
```
    Description copied from interface: ReadableFieldPointer
    
    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.
    
    Specified by:
    
    length in interface ReadableFieldPointer