Package org.apache.drill.exec.physical.impl.scan.framework

Class BasicScanFactory

java.lang.Object

org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory

All Implemented Interfaces:

ManagedScanFramework.ReaderFactory

public class BasicScanFactory
extends Object
implements ManagedScanFramework.ReaderFactory

Basic reader builder for simple non-file readers. Includes only schema negotiation, but no implicit columns. Readers are assumed to be created ahead of time and passed into the framework in the constructor.

This form is designed to simplify conversion of existing readers. While it provides a simple first step, readers should perform further conversion to create readers on the fly rather than up front.

Constructor Summary

Constructors

Constructor	Description
BasicScanFactory(Iterator<ManagedReader<SchemaNegotiator>> iterator)

Method Summary

Modifier and Type	Method	Description
void	bind(ManagedScanFramework framework)
ManagedReader<? extends SchemaNegotiator>	next()

Methods inherited from class java.lang.Object

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

Constructor Details

BasicScanFactory

public BasicScanFactory(Iterator<ManagedReader<SchemaNegotiator>> iterator)

Method Details

bind

public void bind(ManagedScanFramework framework)

Specified by:

bind in interface ManagedScanFramework.ReaderFactory

next

public ManagedReader<? extends SchemaNegotiator> next()

Specified by:

next in interface ManagedScanFramework.ReaderFactory