DataPage (Apache Parquet Column 1.13.1 API)

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 Description

static interface DataPage.Visitor<T>

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	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)
```