Package com.oracle.bmc.objectstorage.transfer.internal

Class ChecksumInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

com.oracle.bmc.objectstorage.transfer.internal.ChecksumInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ChecksumInputStream
extends FilterInputStream

A ChecksumInputStream that computes and verifies a checksum for the data read from the stream.

Supports CRC32C, SHA-256, SHA-384, and MD5 algorithms.

Checksum verification is performed before the last byte is read. If the computed checksum does not match the expected checksum, an IOException is thrown.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
ChecksumInputStream(InputStream in, ChecksumAlgorithm algorithm, String expectedChecksum, long contentLength)

Method Summary

Modifier and Type	Method	Description
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
long	skip(long n)	This method throws an IOException because the underlying stream classes RetryingStream and MultithreadStream do not support the skip operation.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, reset

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Detail

ChecksumInputStream

public ChecksumInputStream(InputStream in,
                           ChecksumAlgorithm algorithm,
                           String expectedChecksum,
                           long contentLength)
                    throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

Method Detail

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

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

This method throws an IOException because the underlying stream classes RetryingStream and MultithreadStream do not support the skip operation.

Overrides:

skip in class FilterInputStream

Throws:

IOException