org.apache.parquet.column.values.dictionary

Class PlainValuesDictionary.PlainBinaryDictionary

java.lang.Object

org.apache.parquet.column.Dictionary

org.apache.parquet.column.values.dictionary.PlainValuesDictionary

org.apache.parquet.column.values.dictionary.PlainValuesDictionary.PlainBinaryDictionary

Enclosing class:

PlainValuesDictionary

public static class PlainValuesDictionary.PlainBinaryDictionary
extends PlainValuesDictionary

a simple implementation of dictionary for plain encoded binary

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.parquet.column.values.dictionary.PlainValuesDictionary

PlainValuesDictionary.PlainBinaryDictionary, PlainValuesDictionary.PlainDoubleDictionary, PlainValuesDictionary.PlainFloatDictionary, PlainValuesDictionary.PlainIntegerDictionary, PlainValuesDictionary.PlainLongDictionary

Constructor Summary

Constructors

Constructor and Description
PlainBinaryDictionary(DictionaryPage dictionaryPage) Decodes Binary values from a DictionaryPage.
PlainBinaryDictionary(DictionaryPage dictionaryPage, Integer length) Decodes Binary values from a DictionaryPage.

Method Summary

Modifier and Type	Method and Description
Binary	decodeToBinary(int id)
int	getMaxId()
String	toString()

Methods inherited from class org.apache.parquet.column.Dictionary

decodeToBoolean, decodeToDouble, decodeToFloat, decodeToInt, decodeToLong, getEncoding

Methods inherited from class java.lang.Object

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

Constructor Detail

PlainBinaryDictionary

public PlainBinaryDictionary(DictionaryPage dictionaryPage)
                      throws IOException

Decodes Binary values from a DictionaryPage. Values are read as length-prefixed values with a 4-byte little-endian length.

Parameters:

dictionaryPage - a DictionaryPage of encoded binary values

Throws:

IOException - if there is an exception while decoding the dictionary page

PlainBinaryDictionary

public PlainBinaryDictionary(DictionaryPage dictionaryPage,
                             Integer length)
                      throws IOException

Decodes Binary values from a DictionaryPage. If the given length is null, the values will be read as length- prefixed values with a 4-byte little-endian length. If length is not null, it will be used as the length for all fixed-length Binary values read from the page.

Parameters:

dictionaryPage - a DictionaryPage of encoded binary values

length - a fixed length of binary arrays, or null if not fixed

Throws:

IOException - if there is an exception while decoding the dictionary page

Method Detail

decodeToBinary

public Binary decodeToBinary(int id)

Overrides:

decodeToBinary in class Dictionary

toString

public String toString()

Overrides:

toString in class Object

getMaxId

public int getMaxId()

Specified by:

getMaxId in class Dictionary