com.aliyun.odps.storage.internal.io

Class CrcStrippedInputStream

java.lang.Object

java.io.InputStream

com.aliyun.odps.storage.internal.io.CrcStrippedInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class CrcStrippedInputStream
extends InputStream

Strips CRC32C checksums from a stream formatted as: [4096 bytes data][4 bytes CRC] ... [N bytes data (1<=N<=4096)][4 bytes CRC]

Assumes:

• All full blocks are exactly 4096 bytes of data + 4 bytes CRC (4100 total)
• The last block has 1~4096 bytes of data + 4 bytes CRC
• No padding is applied to the last block

Constructor Summary

Constructors

Constructor and Description
CrcStrippedInputStream(InputStream source)

Method Summary

Modifier and Type	Method and Description
void	close()
int	read()
int	read(byte[] b, int off, int len)

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

CrcStrippedInputStream

public CrcStrippedInputStream(InputStream source)

Method Detail

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException