org.apache.paimon.io

Class DataFileRecordReader

java.lang.Object

org.apache.paimon.io.DataFileRecordReader

All Implemented Interfaces:

Closeable, AutoCloseable, FileRecordReader<InternalRow>, RecordReader<InternalRow>

public class DataFileRecordReader
extends Object
implements FileRecordReader<InternalRow>

Reads InternalRow from data files.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.paimon.reader.RecordReader

RecordReader.RecordIterator<T>

Constructor Summary

Constructors

Constructor and Description
DataFileRecordReader(FormatReaderFactory readerFactory, FormatReaderFactory.Context context, int[] indexMapping, CastFieldGetter[] castMapping, PartitionInfo partitionInfo)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the reader and should release all resources.
FileRecordIterator<InternalRow>	readBatch() Reads one batch.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.paimon.reader.RecordReader

filter, forEachRemaining, forEachRemainingWithPosition, toCloseableIterator, transform

Constructor Detail

DataFileRecordReader

public DataFileRecordReader(FormatReaderFactory readerFactory,
                            FormatReaderFactory.Context context,
                            @Nullable
                            int[] indexMapping,
                            @Nullable
                            CastFieldGetter[] castMapping,
                            @Nullable
                            PartitionInfo partitionInfo)
                     throws IOException

Throws:

IOException

Method Detail

readBatch

@Nullable
public FileRecordIterator<InternalRow> readBatch()
                                                    throws IOException

Description copied from interface: RecordReader

Reads one batch. The method should return null when reaching the end of the input.

The returned iterator object and any contained objects may be held onto by the source for some time, so it should not be immediately reused by the reader.

Specified by:

readBatch in interface FileRecordReader<InternalRow>

Specified by:

readBatch in interface RecordReader<InternalRow>

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: RecordReader

Closes the reader and should release all resources.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface RecordReader<InternalRow>

Throws:

IOException