org.verapdf.cos.filters

Class COSFilterASCIIHexDecode

java.lang.Object

java.io.InputStream

org.verapdf.as.io.ASInputStream

org.verapdf.as.filters.ASInFilter

org.verapdf.as.filters.io.ASBufferedInFilter

org.verapdf.cos.filters.COSFilterASCIIHexDecode

All Implemented Interfaces:

Closeable, AutoCloseable

public class COSFilterASCIIHexDecode
extends ASBufferedInFilter

Filter for ASCIIHex data decoding.

Author:

Timur Kamalov

Field Summary

Fields

Modifier and Type	Field and Description
static byte	ER

Fields inherited from class org.verapdf.as.filters.io.ASBufferedInFilter

BF_BUFFER_SIZE, buffer, START_BUFFER_SIZE

Fields inherited from class org.verapdf.as.io.ASInputStream

isClosed, isSourceClosed, resourceUsers

Constructor Summary

Constructors

Constructor and Description
COSFilterASCIIHexDecode(ASInputStream stream) Constructor from encoded stream.

Method Summary

Modifier and Type	Method and Description
static byte	decodeLoHex(byte val) Converts char byte to it's hex value, e.g.
int	read(byte[] buffer, int size) Reads up to size bytes of ASCII Hex decoded data into buffer.

Methods inherited from class org.verapdf.as.filters.io.ASBufferedInFilter

addToBuffer, bufferPop, bufferPopArray, bufferSize, closeResource, concatenate, feedBuffer, getBufferBegin, getBufferCapacity, getBufferEnd, getReadCounter, getStream, getStreamUntilToken, initialize, isEOF, peek, peek, processBuffer, read, readByte, reset, resetReadCounter, skip, unread, unread

Methods inherited from class org.verapdf.as.filters.ASInFilter

close, decrementResourceUsers, getInputStream, incrementResourceUsers, read, setInputStream

Methods inherited from class org.verapdf.as.io.ASInputStream

createStreamFromStream

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, skip

Methods inherited from class java.lang.Object

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

Field Detail

ER

public static final byte ER

See Also:

Constant Field Values

Constructor Detail

COSFilterASCIIHexDecode

public COSFilterASCIIHexDecode(ASInputStream stream)
                        throws IOException

Constructor from encoded stream.

Parameters:

stream - is ASCII Hex encoded stream.

Throws:

IOException

Method Detail

read

public int read(byte[] buffer,
                int size)
         throws IOException

Reads up to size bytes of ASCII Hex decoded data into buffer.

Overrides:

read in class ASBufferedInFilter

Parameters:

buffer - is byte array where decoded data will be read.

size - is maximal amount of decoded bytes.

Returns:

amount of actually read bytes.

Throws:

IOException

decodeLoHex

public static byte decodeLoHex(byte val)

Converts char byte to it's hex value, e.g. '1' -> 1 and 'A' -> 10.

Parameters:

val - is character that should be hexadecimal digit.

Returns:

actual value for this character or 127 if character is not a valid hex digit.