com.facebook.presto.hive.parquet.reader

Class ParquetColumnReader

java.lang.Object

com.facebook.presto.hive.parquet.reader.ParquetColumnReader

Direct Known Subclasses:

ParquetBinaryColumnReader, ParquetBooleanColumnReader, ParquetDoubleColumnReader, ParquetFloatColumnReader, ParquetIntColumnReader, ParquetLongColumnReader, ParquetLongDecimalColumnReader, ParquetShortDecimalColumnReader, ParquetTimestampColumnReader

public abstract class ParquetColumnReader
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected parquet.column.ColumnDescriptor	columnDescriptor
protected int	definitionLevel
protected int	nextBatchSize
protected parquet.column.values.ValuesReader	valuesReader

Constructor Summary

Constructors

Constructor and Description
ParquetColumnReader(parquet.column.ColumnDescriptor columnDescriptor)

Method Summary

Modifier and Type	Method and Description
static ParquetColumnReader	createReader(RichColumnDescriptor descriptor)
parquet.column.ColumnDescriptor	getDescriptor()
com.facebook.presto.hive.parquet.reader.ParquetPageReader	getPageReader()
void	prepareNextRead(int batchSize)
Block	readPrimitive(Type type, it.unimi.dsi.fastutil.ints.IntList positions)
protected abstract void	readValue(BlockBuilder blockBuilder, Type type)
void	setPageReader(com.facebook.presto.hive.parquet.reader.ParquetPageReader pageReader)
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 parquet.column.ColumnDescriptor columnDescriptor

definitionLevel

protected int definitionLevel

valuesReader

protected parquet.column.values.ValuesReader valuesReader

nextBatchSize

protected int nextBatchSize

Constructor Detail

ParquetColumnReader

public ParquetColumnReader(parquet.column.ColumnDescriptor columnDescriptor)

Method Detail

readValue

protected abstract void readValue(BlockBuilder blockBuilder,
                                  Type type)

skipValue

protected abstract void skipValue()

createReader

public static ParquetColumnReader createReader(RichColumnDescriptor descriptor)

getPageReader

public com.facebook.presto.hive.parquet.reader.ParquetPageReader getPageReader()

setPageReader

public void setPageReader(com.facebook.presto.hive.parquet.reader.ParquetPageReader pageReader)

prepareNextRead

public void prepareNextRead(int batchSize)

getDescriptor

public parquet.column.ColumnDescriptor getDescriptor()

readPrimitive

public Block readPrimitive(Type type,
                           it.unimi.dsi.fastutil.ints.IntList positions)
                    throws IOException

Throws:

IOException