Package org.djutils.decoderdumper

Class Base64Decoder

java.lang.Object

org.djutils.decoderdumper.Base64Decoder

All Implemented Interfaces:

Decoder

public class Base64Decoder
extends Object
implements Decoder

Decode base64 encoded data and show it as hex bytes. See https://en.wikipedia.org/wiki/Base64

Copyright (c) 2013-2021 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See DJUTILS License.

Version:

$Revision$, $LastChangedDate$, by $Author$, initial version Jan 7, 2019

Author:

Alexander Verbraeck, Peter Knoppers

Constructor Summary

Constructors

Constructor	Description
Base64Decoder(int decodedBytesPerLine, int extraSpaceAfterEvery)	Construct a new Base64Decoder.

Method Summary

Modifier and Type	Method	Description
boolean	append(int address, byte theByte)	Decode one (more) byte.
int	getMaximumWidth()	Retrieve the maximum width (in characters) of results that this Decoder can return (all shorter results will be padded to this width with spaces, unless this is the last active Decoder).
String	getResult()	Retrieve the current result of this Decoder.
boolean	ignoreForIdenticalOutputCheck()	If the result of this Decoder should not be used to compare output lines for suppressing identical lines, this method should return true; otherwise it should return false.

Methods inherited from class java.lang.Object

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

Constructor Detail

Base64Decoder

public Base64Decoder(int decodedBytesPerLine,
                     int extraSpaceAfterEvery)

Construct a new Base64Decoder.

Parameters:

decodedBytesPerLine - int; maximum number of decoded input characters resulting in one output line

extraSpaceAfterEvery - int; insert an extra space after every N output fields (a multiple of 3 makes sense for the base64 decoder because base64 encodes three bytes into 4 characters)

Method Detail

getResult

public String getResult()

Retrieve the current result of this Decoder. Decoders that handle multiple byte input may be somewhere within a token. Such Decoders should report a partial result. If no data has been added, the result must be the empty string.

Specified by:

getResult in interface Decoder

Returns:

String; the current result of this Decoder

getMaximumWidth

public int getMaximumWidth()

Retrieve the maximum width (in characters) of results that this Decoder can return (all shorter results will be padded to this width with spaces, unless this is the last active Decoder).

Specified by:

getMaximumWidth in interface Decoder

Returns:

int; the maximum width (in characters) of results that this Decoder can return

append

public boolean append(int address,
                      byte theByte)
               throws IOException

Decode one (more) byte. This method must return true when a line becomes full due to this call, otherwise this method must return false.

Specified by:

append in interface Decoder

Parameters:

address - int; the address that corresponds with the byte

theByte - byte; the byte

Returns:

boolean; true if an output line has been completed by this call; false if at least one more byte can be appended to the local accumulator before the current output line is full

Throws:

IOException - when the output device throws this exception

ignoreForIdenticalOutputCheck

public boolean ignoreForIdenticalOutputCheck()

If the result of this Decoder should not be used to compare output lines for suppressing identical lines, this method should return true; otherwise it should return false.

Specified by:

ignoreForIdenticalOutputCheck in interface Decoder

Returns:

boolean; true if the result of this Decoder should be ignored in testing for identical output lines; otherwise false