Package org.apache.drill.exec.physical.resultSet.model

Class ReaderIndex

java.lang.Object

org.apache.drill.exec.physical.resultSet.model.ReaderIndex

All Implemented Interfaces:

ColumnReaderIndex

Direct Known Subclasses:

DirectRowIndex, HyperRowIndex, IndirectRowIndex

public abstract class ReaderIndex
extends Object
implements ColumnReaderIndex

Row set index base class used when indexing rows within a row set for a row set reader. Keeps track of the current position, which starts before the first row, meaning that the client must call next() to advance to the first row.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	position
protected final Supplier<Integer>	rowCount

Constructor Summary

Constructors

Constructor	Description
ReaderIndex(Supplier<Integer> rowCount)

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()
int	logicalIndex()
boolean	next()
void	set(int index)
int	size()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.vector.accessor.ColumnReaderIndex

hyperVectorIndex, offset

Field Details

position

protected int position

rowCount

protected final Supplier<Integer> rowCount

Constructor Details

ReaderIndex

public ReaderIndex(Supplier<Integer> rowCount)

Method Details

set

public void set(int index)

logicalIndex

public int logicalIndex()

Specified by:

logicalIndex in interface ColumnReaderIndex

size

public int size()

Specified by:

size in interface ColumnReaderIndex

next

public boolean next()

Specified by:

next in interface ColumnReaderIndex

hasNext

public boolean hasNext()

Specified by:

hasNext in interface ColumnReaderIndex