cascading.tap.hadoop.io

Class FSDigestInputStream

java.lang.Object

FSInputStream

cascading.tap.hadoop.io.FSDigestInputStream

public class FSDigestInputStream
extends FSInputStream

Class FSDigestInputStream is an FSInputStream implementation that can verify a MessageDigest and will count the number of bytes read for use in progress status.

Constructor Summary

Constructors

Constructor and Description
FSDigestInputStream(java.io.InputStream inputStream, java.security.MessageDigest messageDigest, java.lang.String digestHex) Constructor FSDigestInputStream creates a new FSDigestInputStream instance.
FSDigestInputStream(java.io.InputStream inputStream, java.lang.String digestHex) Constructor FSDigestInputStream creates a new FSDigestInputStream instance.

Method Summary

Modifier and Type	Method and Description
void	close()
long	getPos()
int	read()
int	read(byte[] b, int off, int len)
void	seek(long pos)
boolean	seekToNewSource(long targetPos)

Methods inherited from class java.lang.Object

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

Constructor Detail

FSDigestInputStream

public FSDigestInputStream(java.io.InputStream inputStream,
                           java.lang.String digestHex)
                    throws java.io.IOException

Constructor FSDigestInputStream creates a new FSDigestInputStream instance.

Parameters:

inputStream - of type InputStream

digestHex - of type String

Throws:

java.io.IOException - if unable to get md5 digest

FSDigestInputStream

public FSDigestInputStream(java.io.InputStream inputStream,
                           java.security.MessageDigest messageDigest,
                           java.lang.String digestHex)

Constructor FSDigestInputStream creates a new FSDigestInputStream instance.

Parameters:

inputStream - of type InputStream

messageDigest - of type MessageDigest

digestHex - of type String

Method Detail

read

public int read()
         throws java.io.IOException

Throws:

java.io.IOException

read

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

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

seek

public void seek(long pos)
          throws java.io.IOException

Throws:

java.io.IOException

getPos

public long getPos()
            throws java.io.IOException

Throws:

java.io.IOException

seekToNewSource

public boolean seekToNewSource(long targetPos)
                        throws java.io.IOException

Throws:

java.io.IOException