Package org.elasticsearch.xpack.esql.datasources.cache

Class CountingInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.elasticsearch.xpack.esql.datasources.cache.CountingInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class CountingInputStream
extends FilterInputStream

Wraps an InputStream and counts the bytes successfully read. Used by the line-oriented text-format readers to publish a sizeInBytes statistic for stream-only sources (bzip2, zstd-streamed) whose StorageObject.length() throws UnsupportedOperationException.

The count reflects bytes consumed from the underlying stream, including bytes pulled into a downstream buffer (e.g. BufferedReader's 8 KiB block) regardless of whether the reader subsequently propagates them. For a clean whole-file drain this equals the decompressed file size; for partial drains (the cache gate refuses the write in that case) it is an over-estimate.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
CountingInputStream(InputStream in)

Method Summary

Modifier and Type	Method	Description
long	getBytesRead()
void	mark(int readlimit)
int	read()
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class java.io.FilterInputStream

available, close, markSupported, read

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

CountingInputStream

public CountingInputStream(InputStream in)

Method Details

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class FilterInputStream

Throws:

IOException

mark

public void mark(int readlimit)

Overrides:

mark in class FilterInputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class FilterInputStream

Throws:

IOException

getBytesRead

public long getBytesRead()