org.apache.commons.io.input

Class MessageDigestInputStream.Builder

java.lang.Object

org.apache.commons.io.build.AbstractSupplier<T,B>

org.apache.commons.io.build.AbstractOriginSupplier<T,B>

org.apache.commons.io.build.AbstractStreamBuilder<T,B>

org.apache.commons.io.input.ObservableInputStream.AbstractBuilder<MessageDigestInputStream.Builder>

org.apache.commons.io.input.MessageDigestInputStream.Builder

All Implemented Interfaces:

IOSupplier<ObservableInputStream>

Enclosing class:

MessageDigestInputStream

public static class MessageDigestInputStream.Builder
extends ObservableInputStream.AbstractBuilder<MessageDigestInputStream.Builder>

Builds new MessageDigestInputStream.

For example:

 MessageDigestInputStream s = MessageDigestInputStream.builder()
   .setPath(path)
   .setMessageDigest("SHA-512")
   .get();
 

You must specify a message digest algorithm name or instance.

The MD5 cryptographic algorithm is weak and should not be used.

See Also:

get()

Constructor Summary

Constructors

Constructor and Description
Builder() Constructs a new builder of MessageDigestInputStream.

Method Summary

Modifier and Type	Method and Description
MessageDigestInputStream	get() Builds new MessageDigestInputStream.
MessageDigestInputStream.Builder	setMessageDigest(java.security.MessageDigest messageDigest) Sets the message digest.
MessageDigestInputStream.Builder	setMessageDigest(java.lang.String algorithm) Sets the name of the name of the message digest algorithm.

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

setObservers

Methods inherited from class org.apache.commons.io.build.AbstractStreamBuilder

getBufferSize, getBufferSizeDefault, getCharSequence, getCharset, getCharsetDefault, getFile, getInputStream, getOpenOptions, getOutputStream, getPath, getRandomAccessFile, getReader, getWriter, setBufferSize, setBufferSize, setBufferSizeChecker, setBufferSizeMax, setCharset, setCharset, setOpenOptions

Methods inherited from class org.apache.commons.io.build.AbstractOriginSupplier

setByteArray, setCharSequence, setFile, setFile, setInputStream, setOutputStream, setPath, setPath, setRandomAccessFile, setRandomAccessFile, setReader, setURI, setWriter

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.io.function.IOSupplier

asSupplier, getUnchecked

Constructor Detail

Builder

public Builder()

Constructs a new builder of MessageDigestInputStream.

Method Detail

get

public MessageDigestInputStream get()
                             throws java.io.IOException

Builds new MessageDigestInputStream.

You must set an aspect that supports AbstractStreamBuilder.getInputStream(), otherwise, this method throws an exception.

This builder uses the following aspects:

• AbstractStreamBuilder.getInputStream() gets the target aspect.
• MessageDigest

Returns:

a new instance.

Throws:

java.lang.NullPointerException - if messageDigest is null.

java.lang.IllegalStateException - if the origin is null.

java.lang.UnsupportedOperationException - if the origin cannot be converted to an InputStream.

java.io.IOException - if an I/O error occurs converting to an InputStream using AbstractStreamBuilder.getInputStream().

See Also:

AbstractStreamBuilder.getInputStream(), IOSupplier.getUnchecked()

setMessageDigest

public MessageDigestInputStream.Builder setMessageDigest(java.security.MessageDigest messageDigest)

Sets the message digest.

The MD5 cryptographic algorithm is weak and should not be used.

Parameters:

messageDigest - the message digest.

Returns:

this instance.

setMessageDigest

public MessageDigestInputStream.Builder setMessageDigest(java.lang.String algorithm)
                                                  throws java.security.NoSuchAlgorithmException

Sets the name of the name of the message digest algorithm.

The MD5 cryptographic algorithm is weak and should not be used.

Parameters:

algorithm - the name of the algorithm. See the MessageDigest section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.

Returns:

this instance.

Throws:

java.security.NoSuchAlgorithmException - if no Provider supports a MessageDigestSpi implementation for the specified algorithm.