parquet.hadoop.metadata

Class ColumnChunkMetaData

java.lang.Object

parquet.hadoop.metadata.ColumnChunkMetaData

public abstract class ColumnChunkMetaData
extends Object

Column meta data for a block stored in the file footer and passed in the InputSplit

Author:

Julien Le Dem

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ColumnChunkMetaData(ColumnChunkProperties columnChunkProperties)

Method Summary

Methods

Modifier and Type	Method and Description
static ColumnChunkMetaData	get(ColumnPath path, PrimitiveType.PrimitiveTypeName type, CompressionCodecName codec, Set<Encoding> encodings, long firstDataPage, long dictionaryPageOffset, long valueCount, long totalSize, long totalUncompressedSize)
CompressionCodecName	getCodec()
abstract long	getDictionaryPageOffset()
Set<Encoding>	getEncodings()
abstract long	getFirstDataPageOffset()
ColumnPath	getPath()
abstract long	getTotalSize()
abstract long	getTotalUncompressedSize()
PrimitiveType.PrimitiveTypeName	getType()
abstract long	getValueCount()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnChunkMetaData

protected ColumnChunkMetaData(ColumnChunkProperties columnChunkProperties)

Method Detail

get

public static ColumnChunkMetaData get(ColumnPath path,
                      PrimitiveType.PrimitiveTypeName type,
                      CompressionCodecName codec,
                      Set<Encoding> encodings,
                      long firstDataPage,
                      long dictionaryPageOffset,
                      long valueCount,
                      long totalSize,
                      long totalUncompressedSize)

getCodec

public CompressionCodecName getCodec()

getPath

public ColumnPath getPath()

Returns:

column identifier

getType

public PrimitiveType.PrimitiveTypeName getType()

Returns:

type of the column

getFirstDataPageOffset

public abstract long getFirstDataPageOffset()

Returns:

start of the column data offset

getDictionaryPageOffset

public abstract long getDictionaryPageOffset()

Returns:

the location of the dictionary page if any

getValueCount

public abstract long getValueCount()

Returns:

count of values in this block of the column

getTotalUncompressedSize

public abstract long getTotalUncompressedSize()

Returns:

the totalUncompressedSize

getTotalSize

public abstract long getTotalSize()

Returns:

the totalSize

getEncodings

public Set<Encoding> getEncodings()

Returns:

all the encodings used in this column

toString

public String toString()

Overrides:

toString in class Object