com.facebook.presto.parquet.batchreader

Class AbstractNestedBatchReader

java.lang.Object

com.facebook.presto.parquet.batchreader.AbstractNestedBatchReader

All Implemented Interfaces:

ColumnReader

Direct Known Subclasses:

BinaryNestedBatchReader, BooleanNestedBatchReader, Int32NestedBatchReader, Int64NestedBatchReader, Int64TimestampMicrosNestedBatchReader, TimestampNestedBatchReader

public abstract class AbstractNestedBatchReader
extends Object
implements ColumnReader

Field Summary

Fields

Modifier and Type	Field and Description
protected RichColumnDescriptor	columnDescriptor
protected Field	field
protected int	nextBatchSize
protected int	readOffset

Constructor Summary

Constructors

Constructor and Description
AbstractNestedBatchReader(RichColumnDescriptor columnDescriptor)

Method Summary

Modifier and Type	Method and Description
long	getRetainedSizeInBytes()
void	init(PageReader pageReader, Field field, org.apache.parquet.internal.filter2.columnindex.RowRanges rowRanges)
boolean	isInitialized()
void	prepareNextRead(int batchSize)
protected DefinitionLevelDecodingContext	readDefinitionLevels(List<DefinitionLevelValuesDecoderContext> decoderInfos, int batchSize)
protected abstract ColumnChunk	readNestedNoNull()
protected abstract ColumnChunk	readNestedWithNull()
ColumnChunk	readNext()
protected void	readNextPage()
protected RepetitionLevelDecodingContext	readRepetitionLevels(int batchSize)
protected abstract void	seek()

Methods inherited from class java.lang.Object

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

Field Detail

columnDescriptor

protected final RichColumnDescriptor columnDescriptor

field

protected Field field

nextBatchSize

protected int nextBatchSize

readOffset

protected int readOffset

Constructor Detail

AbstractNestedBatchReader

public AbstractNestedBatchReader(RichColumnDescriptor columnDescriptor)

Method Detail

readNestedNoNull

protected abstract ColumnChunk readNestedNoNull()
                                         throws IOException

Throws:

IOException

readNestedWithNull

protected abstract ColumnChunk readNestedWithNull()
                                           throws IOException

Throws:

IOException

seek

protected abstract void seek()
                      throws IOException

Throws:

IOException

isInitialized

public boolean isInitialized()

Specified by:

isInitialized in interface ColumnReader

init

public void init(PageReader pageReader,
                 Field field,
                 org.apache.parquet.internal.filter2.columnindex.RowRanges rowRanges)

Specified by:

init in interface ColumnReader

prepareNextRead

public void prepareNextRead(int batchSize)

Specified by:

prepareNextRead in interface ColumnReader

readNext

public ColumnChunk readNext()

Specified by:

readNext in interface ColumnReader

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Specified by:

getRetainedSizeInBytes in interface ColumnReader

readNextPage

protected void readNextPage()

readRepetitionLevels

protected final RepetitionLevelDecodingContext readRepetitionLevels(int batchSize)
                                                             throws IOException

Throws:

IOException

readDefinitionLevels

protected final DefinitionLevelDecodingContext readDefinitionLevels(List<DefinitionLevelValuesDecoderContext> decoderInfos,
                                                                    int batchSize)
                                                             throws IOException

Throws:

IOException