Package io.trino.parquet.reader

Class AbstractColumnReader<BufferType>

java.lang.Object

io.trino.parquet.reader.AbstractColumnReader<BufferType>

All Implemented Interfaces:

ColumnReader

Direct Known Subclasses:

FlatColumnReader, NestedColumnReader

public abstract class AbstractColumnReader<BufferType>
extends Object
implements ColumnReader

Field Summary

Fields

Modifier and Type	Field	Description
protected final ColumnAdapter<BufferType>	columnAdapter
protected final ValueDecoder.ValueDecodersProvider<BufferType>	decodersProvider
protected DictionaryDecoder<BufferType>	dictionaryDecoder
protected final PrimitiveField	field
protected PageReader	pageReader
protected RowRangesIterator	rowRanges

Constructor Summary

Constructors

Constructor	Description
AbstractColumnReader(PrimitiveField field, ValueDecoder.ValueDecodersProvider<BufferType> decodersProvider, DictionaryDecoder.DictionaryDecoderProvider<BufferType> dictionaryDecoderProvider, ColumnAdapter<BufferType> columnAdapter)

Method Summary

Modifier and Type	Method	Description
protected static ColumnChunk	createDictionaryBlock(int[] dictionaryIds, Block dictionary, int[] definitions, int[] repetitions)
protected ValueDecoder<BufferType>	createValueDecoder(ValueDecoder.ValueDecodersProvider<BufferType> decodersProvider, ParquetEncoding encoding, io.airlift.slice.Slice data)
protected abstract boolean	isNonNull()
protected boolean	produceDictionaryBlock()
void	setPageReader(PageReader pageReader, Optional<FilteredRowRanges> rowRanges)
protected static void	throwEndOfBatchException(int remainingInBatch)
protected static void	unpackDictionaryNullId(int[] source, int[] destination, boolean[] isNull, int destOffset, int chunkSize, int nullId)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.parquet.reader.ColumnReader

hasPageReader, prepareNextRead, readPrimitive

Field Details

field

protected final PrimitiveField field

decodersProvider

protected final ValueDecoder.ValueDecodersProvider<BufferType> decodersProvider

columnAdapter

protected final ColumnAdapter<BufferType> columnAdapter

pageReader

protected PageReader pageReader

rowRanges

protected RowRangesIterator rowRanges

dictionaryDecoder

@Nullable
protected DictionaryDecoder<BufferType> dictionaryDecoder

Constructor Details

AbstractColumnReader

public AbstractColumnReader(PrimitiveField field,
 ValueDecoder.ValueDecodersProvider<BufferType> decodersProvider,
 DictionaryDecoder.DictionaryDecoderProvider<BufferType> dictionaryDecoderProvider,
 ColumnAdapter<BufferType> columnAdapter)

Method Details

setPageReader

public void setPageReader(PageReader pageReader,
 Optional<FilteredRowRanges> rowRanges)

Specified by:

setPageReader in interface ColumnReader

isNonNull

protected abstract boolean isNonNull()

produceDictionaryBlock

protected boolean produceDictionaryBlock()

createValueDecoder

protected ValueDecoder<BufferType> createValueDecoder(ValueDecoder.ValueDecodersProvider<BufferType> decodersProvider,
 ParquetEncoding encoding,
 io.airlift.slice.Slice data)

throwEndOfBatchException

protected static void throwEndOfBatchException(int remainingInBatch)

unpackDictionaryNullId

protected static void unpackDictionaryNullId(int[] source,
 int[] destination,
 boolean[] isNull,
 int destOffset,
 int chunkSize,
 int nullId)

createDictionaryBlock

protected static ColumnChunk createDictionaryBlock(int[] dictionaryIds,
 Block dictionary,
 int[] definitions,
 int[] repetitions)