Package org.apache.commons.compress.utils

Class ChecksumVerifyingInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.commons.compress.utils.ChecksumVerifyingInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

CRC32VerifyingInputStream

public class ChecksumVerifyingInputStream
extends FilterInputStream

Verifies the checksum of the data read once the stream is exhausted.

Since:

1.7

This class is not thread-safe

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
ChecksumVerifyingInputStream(Checksum checksum, InputStream in, long size, long expectedChecksum)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
long	getBytesRemaining()
int	read()	Reads a single byte from the stream
int	read(byte[] b, int off, int len)	Reads from the stream into a byte array.
long	skip(long n)

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset

Methods inherited from class java.lang.Object

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

Constructor Details

ChecksumVerifyingInputStream

public ChecksumVerifyingInputStream(Checksum checksum,
 InputStream in,
 long size,
 long expectedChecksum)

Constructs a new instance.

Parameters:

checksum - Checksum implementation.

in - the stream to wrap

size - the of the stream's content

expectedChecksum - the expected checksum

Method Details

getBytesRemaining

public long getBytesRemaining()

Returns:

bytes remaining to read

Since:

1.21

read

public int read()
         throws IOException

Reads a single byte from the stream

Overrides:

read in class FilterInputStream

Throws:

IOException - if the underlying stream throws or the stream is exhausted and the Checksum doesn't match the expected value

read

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

Reads from the stream into a byte array.

Overrides:

read in class FilterInputStream

Throws:

IOException - if the underlying stream throws or the stream is exhausted and the Checksum doesn't match the expected value

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class FilterInputStream

Throws:

IOException