org.rdfhdt.hdt.util.crc

Class CRCInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.rdfhdt.hdt.util.crc.CRCInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class CRCInputStream
extends FilterInputStream

FilterInputStream that validates a checksum on the fly.

Author:

mario.arias

Field Summary

Fields

Modifier and Type	Field and Description
protected CRC	crc

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
CRCInputStream(InputStream in, CRC crc) Create a CRCInputStream using the specified CRC generator

Method Summary

Modifier and Type	Method and Description
CRC	getCRC()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
boolean	readCRCAndCheck() Read CRC from the stream itself, and check that it matches with the generated from the previous bytes.
void	setCRC(CRC crc) Set a new CRC generator from the current read byte onwards.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

crc

protected CRC crc

Constructor Detail

CRCInputStream

public CRCInputStream(InputStream in,
                      CRC crc)

Create a CRCInputStream using the specified CRC generator

Parameters:

in -

crc -

Method Detail

setCRC

public void setCRC(CRC crc)

Set a new CRC generator from the current read byte onwards.

Parameters:

crc -

getCRC

public CRC getCRC()

readCRCAndCheck

public boolean readCRCAndCheck()
                        throws IOException

Read CRC from the stream itself, and check that it matches with the generated from the previous bytes.

Returns:

True if the CRC's match, False on CRC Error.

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] b)
         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