StringFrameColumnWriter (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.frame.write.columnar.StringFrameColumnWriter<T>

All Implemented Interfaces:: Closeable, AutoCloseable, FrameColumnWriter

public abstract class StringFrameColumnWriter<T extends ColumnValueSelector>
extends Object
implements FrameColumnWriter

Field Summary

Fields
Modifier and Type Field Description

static long DATA_OFFSET

protected boolean multiValue

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`addSelection()`
`void`	`close()`
`abstract List<ByteBuffer>`	`getUtf8ByteBuffersFromSelector(T selector)`	Extracts a list of ByteBuffers from the selector.
`long`	`size()`
`void`	`undo()`
`long`	`writeTo(org.apache.datasketches.memory.WritableMemory memory, long startPosition)`

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

- Field Detail
  - DATA_OFFSET
```
public static final long DATA_OFFSET
```
    See Also:
    
    Constant Field Values
  - multiValue
```
protected final boolean multiValue
```
- Method Detail
  - addSelection
```
public boolean addSelection()
```
    Specified by:
    
    addSelection in interface FrameColumnWriter
  - undo
```
public void undo()
```
    Specified by:
    
    undo in interface FrameColumnWriter
  - size
```
public long size()
```
    Specified by:
    
    size in interface FrameColumnWriter
  - writeTo
```
public long writeTo(org.apache.datasketches.memory.WritableMemory memory,
                    long startPosition)
```
    Specified by:
    
    writeTo in interface FrameColumnWriter
  - close
```
public void close()
```
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface FrameColumnWriter
  - getUtf8ByteBuffersFromSelector
```
@Nullable
public abstract List<ByteBuffer> getUtf8ByteBuffersFromSelector(T selector)
```
    Extracts a list of ByteBuffers from the selector. Null values are returned as FrameWriterUtils.NULL_STRING_MARKER_ARRAY.