com.facebook.presto.parquet.reader

Class PageReader

java.lang.Object

com.facebook.presto.parquet.reader.PageReader

public class PageReader
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.parquet.hadoop.metadata.CompressionCodecName	codec

Constructor Summary

Constructors

Constructor and Description
PageReader(org.apache.parquet.hadoop.metadata.CompressionCodecName codec, LinkedList<DataPage> compressedPages, DictionaryPage compressedDictionaryPage)
PageReader(org.apache.parquet.hadoop.metadata.CompressionCodecName codec, LinkedList<DataPage> compressedPages, DictionaryPage compressedDictionaryPage, org.apache.parquet.internal.column.columnindex.OffsetIndex offsetIndex, Optional<org.apache.parquet.format.BlockCipher.Decryptor> blockDecryptor, byte[] fileAdditionalAuthenticationData, int rowGroupOrdinal, int columnOrdinal)

Method Summary

Modifier and Type	Method and Description
static long	getFirstRowIndex(int pageIndex, org.apache.parquet.internal.column.columnindex.OffsetIndex offsetIndex)
long	getTotalValueCount()
DictionaryPage	readDictionaryPage()
DataPage	readPage()

Methods inherited from class java.lang.Object

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

Field Detail

codec

protected final org.apache.parquet.hadoop.metadata.CompressionCodecName codec

Constructor Detail

PageReader

public PageReader(org.apache.parquet.hadoop.metadata.CompressionCodecName codec,
                  LinkedList<DataPage> compressedPages,
                  DictionaryPage compressedDictionaryPage)
           throws IOException

Parameters:

compressedPages - This parameter will be mutated destructively as DataPage entries are removed as part of readPage(). The caller should not retain a reference to this list after passing it in as a constructor argument.

Throws:

IOException

PageReader

public PageReader(org.apache.parquet.hadoop.metadata.CompressionCodecName codec,
                  LinkedList<DataPage> compressedPages,
                  DictionaryPage compressedDictionaryPage,
                  org.apache.parquet.internal.column.columnindex.OffsetIndex offsetIndex,
                  Optional<org.apache.parquet.format.BlockCipher.Decryptor> blockDecryptor,
                  byte[] fileAdditionalAuthenticationData,
                  int rowGroupOrdinal,
                  int columnOrdinal)

Method Detail

getTotalValueCount

public long getTotalValueCount()

readPage

public DataPage readPage()

readDictionaryPage

public DictionaryPage readDictionaryPage()

getFirstRowIndex

public static long getFirstRowIndex(int pageIndex,
                                    org.apache.parquet.internal.column.columnindex.OffsetIndex offsetIndex)