Class BinaryCodec

java.lang.Object

org.apache.commons.codec.binary.BinaryCodec

All Implemented Interfaces:

BinaryDecoder, BinaryEncoder, Decoder, Encoder

public class BinaryCodec
extends Object
implements BinaryDecoder, BinaryEncoder

Converts between byte arrays and strings of "0"s and "1"s.

This class is immutable and thread-safe.

Since:

1.3

Constructor Summary

Constructors

Constructor	Description
BinaryCodec()	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
byte[]	decode(byte[] ascii)	Decodes a byte array where each byte represents an ASCII '0' or '1'.
Object	decode(Object ascii)	Decodes a byte array where each byte represents an ASCII '0' or '1'.
byte[]	encode(byte[] raw)	Converts an array of raw binary data into an array of ASCII 0 and 1 characters.
Object	encode(Object raw)	Converts an array of raw binary data into an array of ASCII 0 and 1 chars.
static byte[]	fromAscii(byte[] ascii)	Decodes a byte array where each byte represents an ASCII '0' or '1'.
static byte[]	fromAscii(char[] ascii)	Decodes a char array where each char represents an ASCII '0' or '1'.
static byte[]	toAsciiBytes(byte[] raw)	Converts an array of raw binary data into an array of ASCII 0 and 1 character bytes - each byte is a truncated char.
static char[]	toAsciiChars(byte[] raw)	Converts an array of raw binary data into an array of ASCII 0 and 1 characters.
static String	toAsciiString(byte[] raw)	Converts an array of raw binary data into a String of ASCII 0 and 1 characters.
byte[]	toByteArray(String ascii)	Decodes a String where each char of the String represents an ASCII '0' or '1'.

Methods inherited from class Object

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

Constructor Details

BinaryCodec

public BinaryCodec()

Constructs a new instance.

Method Details

fromAscii

public static byte[] fromAscii(byte[] ascii)

Decodes a byte array where each byte represents an ASCII '0' or '1'.

All input must consist of ASCII '0' and '1' values. If the input length is not a multiple of 8, the leading length % 8 values are validated but omitted from the decoded result. Null or empty input produces an empty byte array.

Parameters:

ascii - each byte represents an ASCII '0' or '1'.

Returns:

The raw encoded binary where each bit corresponds to a byte in the byte array argument.

Throws:

IllegalArgumentException - Thrown if the input contains a value other than ASCII '0' or '1'.

fromAscii

public static byte[] fromAscii(char[] ascii)

Decodes a char array where each char represents an ASCII '0' or '1'.

All input must consist of ASCII '0' and '1' values. If the input length is not a multiple of 8, the leading length % 8 values are validated but omitted from the decoded result. Null or empty input produces an empty byte array.

Parameters:

ascii - each char represents an ASCII '0' or '1'.

Returns:

The raw encoded binary where each bit corresponds to a char in the char array argument.

Throws:

IllegalArgumentException - Thrown if the input contains a value other than ASCII '0' or '1'.

toAsciiBytes

public static byte[] toAsciiBytes(byte[] raw)

Converts an array of raw binary data into an array of ASCII 0 and 1 character bytes - each byte is a truncated char.

Parameters:

raw - The raw binary data to convert.

Returns:

An array of 0 and 1 character bytes for each bit of the argument.

See Also:

• BinaryEncoder.encode(byte[])

toAsciiChars

public static char[] toAsciiChars(byte[] raw)

Converts an array of raw binary data into an array of ASCII 0 and 1 characters.

Parameters:

raw - The raw binary data to convert.

Returns:

An array of 0 and 1 characters for each bit of the argument.

See Also:

• BinaryEncoder.encode(byte[])

toAsciiString

public static String toAsciiString(byte[] raw)

Converts an array of raw binary data into a String of ASCII 0 and 1 characters.

Parameters:

raw - The raw binary data to convert.

Returns:

A String of 0 and 1 characters representing the binary data.

See Also:

• BinaryEncoder.encode(byte[])

decode

public byte[] decode(byte[] ascii)

Decodes a byte array where each byte represents an ASCII '0' or '1'.

All input must consist of ASCII '0' and '1' values. If the input length is not a multiple of 8, the leading length % 8 values are validated but omitted from the decoded result. Null or empty input produces an empty byte array.

Specified by:

decode in interface BinaryDecoder

Parameters:

ascii - each byte represents an ASCII '0' or '1'.

Returns:

The raw encoded binary where each bit corresponds to a byte in the byte array argument.

Throws:

IllegalArgumentException - Thrown if the input contains a value other than ASCII '0' or '1'.

See Also:

• Decoder.decode(Object)

decode

public Object decode(Object ascii)
              throws DecoderException

Decodes a byte array where each byte represents an ASCII '0' or '1'.

All input must consist of ASCII '0' and '1' values. If the input length is not a multiple of 8, the leading length % 8 values are validated but omitted from the decoded result. Null or empty input produces an empty byte array.

Specified by:

decode in interface Decoder

Parameters:

ascii - each byte represents an ASCII '0' or '1'.

Returns:

The raw encoded binary where each bit corresponds to a byte in the byte array argument.

Throws:

IllegalArgumentException - Thrown if the input contains a value other than ASCII '0' or '1'.

DecoderException - Thrown if the argument is not a byte[], char[], or String.

See Also:

• Decoder.decode(Object)

encode

public byte[] encode(byte[] raw)

Converts an array of raw binary data into an array of ASCII 0 and 1 characters.

Specified by:

encode in interface BinaryEncoder

Parameters:

raw - The raw binary data to convert.

Returns:

0 and 1 ASCII character bytes one for each bit of the argument.

See Also:

• BinaryEncoder.encode(byte[])

encode

public Object encode(Object raw)
              throws EncoderException

Converts an array of raw binary data into an array of ASCII 0 and 1 chars.

Specified by:

encode in interface Encoder

Parameters:

raw - The raw binary data to convert.

Returns:

0 and 1 ASCII character chars one for each bit of the argument.

Throws:

EncoderException - Thrown if the argument is not a byte[].

See Also:

• Encoder.encode(Object)

toByteArray

public byte[] toByteArray(String ascii)

Decodes a String where each char of the String represents an ASCII '0' or '1'.

All input must consist of ASCII '0' and '1' values. If the input length is not a multiple of 8, the leading length % 8 values are validated but omitted from the decoded result. Null or empty input produces an empty byte array.

Parameters:

ascii - String of '0' and '1' characters.

Returns:

The raw encoded binary where each bit corresponds to a byte in the byte array argument.

Throws:

IllegalArgumentException - Thrown if the input contains a value other than ASCII '0' or '1'.

See Also:

• Decoder.decode(Object)