Package io.deephaven.parquet.base

Class ParquetFileReader

java.lang.Object

io.deephaven.parquet.base.ParquetFileReader

public class ParquetFileReader
extends Object

Top level accessor for a parquet file

Constructor Summary

Constructors

Constructor	Description
ParquetFileReader(String filePath, SeekableChannelsProvider channelsProvider)

Method Summary

Modifier and Type	Method	Description
SeekableChannelsProvider	getChannelsProvider()
Set<String>	getColumnsWithDictionaryUsedOnEveryDataPage()	Get the name of all columns that we can know for certain (a) have a dictionary, and (b) use the dictionary on all data pages.
org.apache.parquet.format.FileMetaData	getFileMetaData()
org.apache.parquet.hadoop.metadata.ParquetMetadata	getParquetMetadata()
RowGroupReader	getRowGroupReader(int groupNumber)
org.apache.parquet.schema.MessageType	getSchema()

Methods inherited from class java.lang.Object

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

Constructor Details

ParquetFileReader

public ParquetFileReader(String filePath,
 SeekableChannelsProvider channelsProvider)
                  throws IOException

Throws:

IOException

Method Details

getChannelsProvider

public SeekableChannelsProvider getChannelsProvider()

Returns:

The SeekableChannelsProvider used for this reader, appropriate to use for related file access

getColumnsWithDictionaryUsedOnEveryDataPage

public Set<String> getColumnsWithDictionaryUsedOnEveryDataPage()

Get the name of all columns that we can know for certain (a) have a dictionary, and (b) use the dictionary on all data pages.

Returns:

A set of parquet column names that satisfies the required condition.

getRowGroupReader

public RowGroupReader getRowGroupReader(int groupNumber)

getSchema

public org.apache.parquet.schema.MessageType getSchema()

getParquetMetadata

public org.apache.parquet.hadoop.metadata.ParquetMetadata getParquetMetadata()

getFileMetaData

public org.apache.parquet.format.FileMetaData getFileMetaData()