org.apache.commons.compress.utils

Class ChecksumCalculatingInputStream

java.lang.Object

java.io.InputStream

org.apache.commons.compress.utils.ChecksumCalculatingInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ChecksumCalculatingInputStream
extends java.io.InputStream

A stream that calculates the checksum of the data read.

Since:

1.14

Constructor Summary

Constructors

Constructor and Description
ChecksumCalculatingInputStream(java.util.zip.Checksum checksum, java.io.InputStream inputStream)

Method Summary

Modifier and Type	Method and Description
long	getValue() Returns the calculated checksum.
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, close, mark, markSupported, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

ChecksumCalculatingInputStream

public ChecksumCalculatingInputStream(java.util.zip.Checksum checksum,
                                      java.io.InputStream inputStream)

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

getValue

public long getValue()

Returns the calculated checksum.

Returns:

the calculated checksum.