org.apache.paimon.reader

Class PackChangelogReader

java.lang.Object

org.apache.paimon.reader.PackChangelogReader

All Implemented Interfaces:

Closeable, AutoCloseable, RecordReader<InternalRow>

public class PackChangelogReader
extends Object
implements RecordReader<InternalRow>

The reader which will pack the update before and update after message together.

Nested Class Summary

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

RecordReader.RecordIterator<T>

Constructor Summary

Constructors

Constructor and Description
PackChangelogReader(RecordReader<InternalRow> reader, java.util.function.BiFunction<InternalRow,InternalRow,InternalRow> function, RowType rowType)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the reader and should release all resources.
RecordReader.RecordIterator<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

PackChangelogReader

public PackChangelogReader(RecordReader<InternalRow> reader,
                           java.util.function.BiFunction<InternalRow,InternalRow,InternalRow> function,
                           RowType rowType)

Method Detail

readBatch

@Nullable
public RecordReader.RecordIterator<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 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