FrameColumnReaderUtils (druid-processing 30.0.1 API)

java.lang.Object
- org.apache.druid.frame.read.columnar.FrameColumnReaderUtils

public class FrameColumnReaderUtils
extends Object

Constructor Summary

Constructors
Constructor Description

FrameColumnReaderUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`adjustCumulativeRowLength(int cumulativeRowLength)`	Adjusts a negative cumulative row length from `getCumulativeRowLength(Memory, long, int)` to be the actual positive length.
`static int`	`getAdjustedCumulativeRowLength(org.apache.datasketches.memory.Memory memory, long offset, int physicalRow)`
`static int`	`getCumulativeRowLength(org.apache.datasketches.memory.Memory memory, long offset, int physicalRow)`	Returns cumulative row length, if the row is not null itself, or -(cumulative row length) - 1 if the row is null itself.
`static boolean`	`isNullRow(int cumulativeRowLength)`	When given a return value from `getCumulativeRowLength(Memory, long, int)`, returns whether the row is null itself (i.e.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FrameColumnReaderUtils
```
public FrameColumnReaderUtils()
```
- Method Detail
  - adjustCumulativeRowLength
```
public static int adjustCumulativeRowLength(int cumulativeRowLength)
```
    Adjusts a negative cumulative row length from getCumulativeRowLength(Memory, long, int) to be the actual positive length.
  - getCumulativeRowLength
```
public static int getCumulativeRowLength(org.apache.datasketches.memory.Memory memory,
                                         long offset,
                                         int physicalRow)
```
    Returns cumulative row length, if the row is not null itself, or -(cumulative row length) - 1 if the row is null itself. To check if the return value from this function indicate a null row, use isNullRow(int) To get the actual cumulative row length, use adjustCumulativeRowLength(int).
  - getAdjustedCumulativeRowLength
```
public static int getAdjustedCumulativeRowLength(org.apache.datasketches.memory.Memory memory,
                                                 long offset,
                                                 int physicalRow)
```
  - isNullRow
```
public static boolean isNullRow(int cumulativeRowLength)
```
    When given a return value from getCumulativeRowLength(Memory, long, int), returns whether the row is null itself (i.e. a null array).