org.apache.druid.frame.write.columnar

Class StringFrameColumnWriter<T extends ColumnValueSelector>

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 and Description
static long	DATA_OFFSET
protected boolean	multiValue

Method Summary

Modifier and Type	Method and 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 Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface FrameColumnWriter

getUtf8ByteBuffersFromSelector

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.