org.apache.commons.compress.utils

Class ChecksumVerifyingInputStream

java.lang.Object

java.io.InputStream

org.apache.commons.compress.utils.ChecksumVerifyingInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

CRC32VerifyingInputStream

public class ChecksumVerifyingInputStream
extends java.io.InputStream

A stream that verifies the checksum of the data read once the stream is exhausted.

Since:

1.7

Field Summary

Fields

Modifier and Type	Field and Description
private long	bytesRemaining
private java.util.zip.Checksum	checksum
private long	expectedChecksum
private java.io.InputStream	in

Constructor Summary

Constructors

Constructor and Description
ChecksumVerifyingInputStream(java.util.zip.Checksum checksum, java.io.InputStream in, long size, long expectedChecksum)

Method Summary

Modifier and Type	Method and Description
void	close()
int	read() Reads a single byte from the stream
int	read(byte[] b) Reads a byte array 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.InputStream

available, mark, markSupported, reset

Methods inherited from class java.lang.Object

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

Field Detail

in

private final java.io.InputStream in

bytesRemaining

private long bytesRemaining

expectedChecksum

private final long expectedChecksum

checksum

private final java.util.zip.Checksum checksum

Constructor Detail

ChecksumVerifyingInputStream

public ChecksumVerifyingInputStream(java.util.zip.Checksum checksum,
                                    java.io.InputStream in,
                                    long size,
                                    long expectedChecksum)

Method Detail

read

public int read()
         throws java.io.IOException

Reads a single byte from the stream

Specified by:

read in class java.io.InputStream

Throws:

java.io.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)
         throws java.io.IOException

Reads a byte array from the stream

Overrides:

read in class java.io.InputStream

Throws:

java.io.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 java.io.IOException

Reads from the stream into a byte array.

Overrides:

read in class java.io.InputStream

Throws:

java.io.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 java.io.IOException

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException