org.apache.parquet.column.page

Class DataPage

java.lang.Object

org.apache.parquet.column.page.Page

org.apache.parquet.column.page.DataPage

Direct Known Subclasses:

DataPageV1, DataPageV2

public abstract class DataPage
extends Page

one data page in a chunk

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DataPage.Visitor<T>

Method Summary

Modifier and Type	Method and Description
abstract <T> T	accept(DataPage.Visitor<T> visitor)
Optional<Long>	getFirstRowIndex()
abstract Optional<Integer>	getIndexRowCount()
int	getValueCount()

Methods inherited from class org.apache.parquet.column.page.Page

getCompressedSize, getCrc, getUncompressedSize, setCrc

Methods inherited from class java.lang.Object

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

Method Detail

getValueCount

public int getValueCount()

Returns:

the number of values in that page

getFirstRowIndex

public Optional<Long> getFirstRowIndex()

Returns:

the index of the first row in this page if the related data is available (the optional column-index contains this value)

getIndexRowCount

public abstract Optional<Integer> getIndexRowCount()

Returns:

the number of rows in this page if the related data is available (in case of pageV1 the optional column-index contains this value)

accept

public abstract <T> T accept(DataPage.Visitor<T> visitor)