org.apache.parquet.column.impl

Class ColumnReaderImpl

java.lang.Object

org.apache.parquet.column.impl.ColumnReaderImpl

All Implemented Interfaces:

ColumnReader

public class ColumnReaderImpl
extends Object

ColumnReader implementation for the scenario when column indexes are not used (all values are read)

Field Summary

Fields

Modifier and Type	Field and Description
protected ValuesReader	dataColumn

Constructor Summary

Constructors

Constructor and Description
ColumnReaderImpl(ColumnDescriptor path, PageReader pageReader, PrimitiveConverter converter, VersionParser.ParsedVersion writerVersion) creates a reader for triplets

Method Summary

Modifier and Type	Method and Description
void	consume() Consume the current triplet, moving to the next value.
Binary	getBinary()
boolean	getBoolean()
int	getCurrentDefinitionLevel()
int	getCurrentRepetitionLevel() must return 0 when isFullyConsumed() == true
int	getCurrentValueDictionaryID() available when the underlying encoding is dictionary based
ColumnDescriptor	getDescriptor()
double	getDouble()
float	getFloat()
int	getInteger()
long	getLong()
long	getTotalValueCount() Deprecated.
void	readValue() Reads the value into the binding.
void	skip() Skip the current value
void	writeCurrentValueToConverter() writes the current value to the converter

Methods inherited from class java.lang.Object

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

Field Detail

dataColumn

protected ValuesReader dataColumn

Constructor Detail

ColumnReaderImpl

public ColumnReaderImpl(ColumnDescriptor path,
                        PageReader pageReader,
                        PrimitiveConverter converter,
                        VersionParser.ParsedVersion writerVersion)

creates a reader for triplets

Parameters:

path - the descriptor for the corresponding column

pageReader - the underlying store to read from

converter - a converter that materializes the values in this column in the current record

writerVersion - writer version string from the Parquet file being read

Method Detail

writeCurrentValueToConverter

public void writeCurrentValueToConverter()

writes the current value to the converter

Specified by:

writeCurrentValueToConverter in interface ColumnReader

See Also:

ColumnReader.writeCurrentValueToConverter()

getCurrentValueDictionaryID

public int getCurrentValueDictionaryID()

Description copied from interface: ColumnReader

available when the underlying encoding is dictionary based

Specified by:

getCurrentValueDictionaryID in interface ColumnReader

Returns:

the dictionary id for the current value

getInteger

public int getInteger()

Specified by:

getInteger in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getInteger()

getBoolean

public boolean getBoolean()

Specified by:

getBoolean in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getBoolean()

getLong

public long getLong()

Specified by:

getLong in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getLong()

getBinary

public Binary getBinary()

Specified by:

getBinary in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getBinary()

getFloat

public float getFloat()

Specified by:

getFloat in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getFloat()

getDouble

public double getDouble()

Specified by:

getDouble in interface ColumnReader

Returns:

the current value

See Also:

ColumnReader.getDouble()

getCurrentRepetitionLevel

public int getCurrentRepetitionLevel()

must return 0 when isFullyConsumed() == true

Specified by:

getCurrentRepetitionLevel in interface ColumnReader

Returns:

the repetition level for the current value

See Also:

ColumnReader.getCurrentRepetitionLevel()

getDescriptor

public ColumnDescriptor getDescriptor()

Specified by:

getDescriptor in interface ColumnReader

Returns:

Descriptor of the column.

See Also:

ColumnReader.getDescriptor()

readValue

public void readValue()

Reads the value into the binding.

skip

public void skip()

Skip the current value

Specified by:

skip in interface ColumnReader

See Also:

ColumnReader.skip()

getCurrentDefinitionLevel

public int getCurrentDefinitionLevel()

Specified by:

getCurrentDefinitionLevel in interface ColumnReader

Returns:

the definition level for the current value

See Also:

ColumnReader.getCurrentDefinitionLevel()

consume

public void consume()

Consume the current triplet, moving to the next value.

Specified by:

consume in interface ColumnReader

See Also:

ColumnReader.consume()

getTotalValueCount

@Deprecated
public long getTotalValueCount()

Deprecated.

Specified by:

getTotalValueCount in interface ColumnReader

Returns:

the totalCount of values to be consumed

See Also:

ColumnReader.getTotalValueCount()