Package org.openpdf.renderer.decode

Class ASCIIHexDecode

java.lang.Object

org.openpdf.renderer.decode.ASCIIHexDecode

public class ASCIIHexDecode
extends Object

decode an array of hex nybbles into a byte array

Field Summary

Fields

Modifier and Type	Field	Description
private ByteBuffer	buf

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ASCIIHexDecode(ByteBuffer buf)	initialize the decoder with an array of bytes in ASCIIHex format

Method Summary

Modifier and Type	Method	Description
private ByteBuffer	decode()	decode the array
static ByteBuffer	decode(ByteBuffer buf, PDFObject params)	decode an array of bytes in ASCIIHex format.
private int	readHexDigit()	get the next character from the input

Methods inherited from class java.lang.Object

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

Field Details

buf

private ByteBuffer buf

Constructor Details

ASCIIHexDecode

private ASCIIHexDecode(ByteBuffer buf)

initialize the decoder with an array of bytes in ASCIIHex format

Method Details

readHexDigit

private int readHexDigit()
                  throws PDFParseException

get the next character from the input

Returns:

a number from 0-15, or -1 for the end character

Throws:

PDFParseException

decode

private ByteBuffer decode()
                   throws PDFParseException

decode the array

Returns:

the decoded bytes

Throws:

PDFParseException

decode

public static ByteBuffer decode(ByteBuffer buf,
 PDFObject params)
                         throws PDFParseException

decode an array of bytes in ASCIIHex format.

ASCIIHex format consists of a sequence of Hexidecimal digits, with possible whitespace, ending with the '>' character.

Parameters:

buf - the encoded ASCII85 characters in a byte buffer

params - parameters to the decoder (ignored)

Returns:

the decoded bytes

Throws:

PDFParseException