org.apache.druid.frame.field

Class StringArrayFieldWriter

java.lang.Object

org.apache.druid.frame.field.StringArrayFieldWriter

All Implemented Interfaces:

Closeable, AutoCloseable, FieldWriter

public class StringArrayFieldWriter
extends Object
implements FieldWriter

Like StringFieldWriter, but reads arrays from a ColumnValueSelector instead of reading from a DimensionSelector. See StringFieldReader for format details.

Constructor Summary

Constructors

Constructor and Description
StringArrayFieldWriter(ColumnValueSelector<List<String>> selector)

Method Summary

Modifier and Type	Method and Description
void	close() Releases resources held by this writer.
long	writeTo(org.apache.datasketches.memory.WritableMemory memory, long position, long maxSize) Writes the current selection at the given memory position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StringArrayFieldWriter

public StringArrayFieldWriter(ColumnValueSelector<List<String>> selector)

Method Detail

writeTo

public long writeTo(org.apache.datasketches.memory.WritableMemory memory,
                    long position,
                    long maxSize)

Description copied from interface: FieldWriter

Writes the current selection at the given memory position.

Specified by:

writeTo in interface FieldWriter

Parameters:

memory - memory region in little-endian order

position - position to write

maxSize - maximum number of bytes to write

Returns:

number of bytes written, or -1 if "maxSize" was not enough memory

close

public void close()

Description copied from interface: FieldWriter

Releases resources held by this writer.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface FieldWriter