Package org.apache.commons.io.input

Class MessageDigestInputStream.MessageDigestMaintainingObserver

java.lang.Object

org.apache.commons.io.input.ObservableInputStream.Observer

org.apache.commons.io.input.MessageDigestInputStream.MessageDigestMaintainingObserver

Enclosing class:

MessageDigestInputStream

public static class MessageDigestInputStream.MessageDigestMaintainingObserver
extends ObservableInputStream.Observer

Maintains the message digest.

Constructor Summary

Constructors

Constructor	Description
MessageDigestMaintainingObserver(java.security.MessageDigest messageDigest)	Constructs an MessageDigestMaintainingObserver for the given MessageDigest.

Method Summary

Modifier and Type	Method	Description
void	data(byte[] input, int offset, int length)	Called to indicate that InputStream.read(byte[]), or InputStream.read(byte[], int, int) have been called, and are about to invoke data.
void	data(int input)	Called to indicate, that InputStream.read() has been invoked on the ObservableInputStream, and will return a value.

Methods inherited from class org.apache.commons.io.input.ObservableInputStream.Observer

closed, error, finished

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigestMaintainingObserver

public MessageDigestMaintainingObserver(java.security.MessageDigest messageDigest)

Constructs an MessageDigestMaintainingObserver for the given MessageDigest.

Parameters:

messageDigest - the message digest to use

Throws:

java.lang.NullPointerException - if messageDigest is null.

Method Detail

data

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

Description copied from class: ObservableInputStream.Observer

Called to indicate that InputStream.read(byte[]), or InputStream.read(byte[], int, int) have been called, and are about to invoke data.

Overrides:

data in class ObservableInputStream.Observer

Parameters:

input - The byte array, which has been passed to the read call, and where data has been stored.

offset - The offset within the byte array, where data has been stored.

length - The number of bytes, which have been stored in the byte array.

Throws:

java.io.IOException - if an I/O error occurs.

data

public void data(int input)
          throws java.io.IOException

Description copied from class: ObservableInputStream.Observer

Called to indicate, that InputStream.read() has been invoked on the ObservableInputStream, and will return a value.

Overrides:

data in class ObservableInputStream.Observer

Parameters:

input - The value, which is being returned. This will never be -1 (EOF), because, in that case, ObservableInputStream.Observer.finished() will be invoked instead.

Throws:

java.io.IOException - if an I/O error occurs.