org.apache.arrow.dataset.jni

Class NativeScanner

java.lang.Object

org.apache.arrow.dataset.jni.NativeScanner

All Implemented Interfaces:

AutoCloseable, Scanner

public class NativeScanner
extends Object
implements Scanner

Native implementation of Scanner. Note that it currently emits only a single scan task of type NativeScanTask, which is internally a combination of all scan task instances returned by the native scanner.

Constructor Summary

Constructors

Constructor and Description
NativeScanner(NativeContext context, long scannerId)

Method Summary

Modifier and Type	Method and Description
void	close()
Iterable<? extends NativeScanTask>	scan() Perform the scan operation.
Schema	schema() Get the schema of this Scanner.

Methods inherited from class java.lang.Object

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

Constructor Detail

NativeScanner

public NativeScanner(NativeContext context,
                     long scannerId)

Method Detail

scan

public Iterable<? extends NativeScanTask> scan()

Description copied from interface: Scanner

Perform the scan operation.

Specified by:

scan in interface Scanner

Returns:

a iterable set of ScanTasks. Each task is considered independent and it is allowed to execute the tasks concurrently to gain better performance.

schema

public Schema schema()

Description copied from interface: Scanner

Get the schema of this Scanner.

Specified by:

schema in interface Scanner

Returns:

the schema instance

close

public void close()

Specified by:

close in interface AutoCloseable