com.facebook.presto.parquet.reader

Class AbstractColumnReader

java.lang.Object

com.facebook.presto.parquet.reader.AbstractColumnReader

All Implemented Interfaces:

ColumnReader

Direct Known Subclasses:

BinaryColumnReader, BooleanColumnReader, DoubleColumnReader, FloatColumnReader, IntColumnReader, LongColumnReader, LongDecimalColumnReader, LongTimestampMicrosColumnReader, ShortDecimalColumnReader, TimestampColumnReader

public abstract class AbstractColumnReader
extends Object
implements ColumnReader

Field Summary

Fields

Modifier and Type	Field and Description
protected RichColumnDescriptor	columnDescriptor
protected int	definitionLevel
protected int	repetitionLevel
protected org.apache.parquet.column.values.ValuesReader	valuesReader

Constructor Summary

Constructors

Constructor and Description
AbstractColumnReader(RichColumnDescriptor columnDescriptor)

Method Summary

Modifier and Type	Method and Description
void	init(PageReader pageReader, Field field, org.apache.parquet.internal.filter2.columnindex.RowRanges rowRanges)
boolean	isInitialized()
protected boolean	isValueNull()
void	prepareNextRead(int batchSize)
ColumnChunk	readNext()
protected abstract void	readValue(com.facebook.presto.common.block.BlockBuilder blockBuilder, com.facebook.presto.common.type.Type type)
protected abstract void	skipValue()

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

definitionLevel

protected int definitionLevel

repetitionLevel

protected int repetitionLevel

valuesReader

protected org.apache.parquet.column.values.ValuesReader valuesReader

Constructor Detail

AbstractColumnReader

public AbstractColumnReader(RichColumnDescriptor columnDescriptor)

Method Detail

readValue

protected abstract void readValue(com.facebook.presto.common.block.BlockBuilder blockBuilder,
                                  com.facebook.presto.common.type.Type type)

skipValue

protected abstract void skipValue()

isValueNull

protected boolean isValueNull()

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