com.google.cloud.tools.jib.hash

Class CountingDigestOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.security.DigestOutputStream

com.google.cloud.tools.jib.hash.CountingDigestOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class CountingDigestOutputStream
extends java.security.DigestOutputStream

A DigestOutputStream that also keeps track of the total number of bytes written.

Field Summary

Fields inherited from class java.security.DigestOutputStream

digest

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
CountingDigestOutputStream(java.io.OutputStream outputStream) Wraps the outputStream.

Method Summary

Modifier and Type	Method and Description
BlobDescriptor	computeDigest() Computes the hash and returns it along with the size of the bytes written to compute the hash.
void	write(byte[] data, int offset, int length)
void	write(int singleByte)

Methods inherited from class java.security.DigestOutputStream

getMessageDigest, on, setMessageDigest, toString

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

CountingDigestOutputStream

public CountingDigestOutputStream(java.io.OutputStream outputStream)

Wraps the outputStream.

Parameters:

outputStream - the OutputStream to wrap.

Method Detail

computeDigest

public BlobDescriptor computeDigest()

Computes the hash and returns it along with the size of the bytes written to compute the hash. The buffer resets after this method is called, so this method should only be called once per computation.

Returns:

the computed hash and the size of the bytes consumed

write

public void write(byte[] data,
                  int offset,
                  int length)
           throws java.io.IOException

Overrides:

write in class java.security.DigestOutputStream

Throws:

java.io.IOException

write

public void write(int singleByte)
           throws java.io.IOException

Overrides:

write in class java.security.DigestOutputStream

Throws:

java.io.IOException