Package org.apache.directory.api.asn1.ber

Class Asn1Decoder

java.lang.Object

org.apache.directory.api.asn1.ber.Asn1Decoder

All Implemented Interfaces:

TLVBerDecoderMBean

public final class Asn1Decoder
extends Object
implements TLVBerDecoderMBean

A BER TLV Tag component decoder. This decoder instantiate a Tag. The tag won't be implementations should not copy the handle to the Tag object delivered but should copy the data if they need it over the long term.

Author:

Apache Directory Project

Method Summary

Modifier and Type	Method	Description
static void	decode(ByteBuffer stream, Asn1Container container)	The decoder main function.
int	getMaxLengthLength()	Get the actual maximum number of bytes that can be used to encode the Length
int	getMaxTagLength()	Get the actual maximum number of bytes that can be used to encode the Tag
boolean	isIndefiniteLengthAllowed()	Tell if indefinite length form could be used for Length

Methods inherited from class java.lang.Object

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

Method Detail

decode

public static void decode(ByteBuffer stream,
                          Asn1Container container)
                   throws DecoderException

The decoder main function. This is where we read bytes from the stream and go through the automaton. It's an inifnite loop which stop when no more bytes are to be read. It can occurs if the ByteBuffer is exhausted or if the PDU has been fully decoded.

Parameters:

stream - The ByteBuffer containing the PDU to decode

container - The container that store the state, the result and other elements.

Throws:

DecoderException - Thrown if anything went wrong!

getMaxLengthLength

public int getMaxLengthLength()

Get the actual maximum number of bytes that can be used to encode the Length

Specified by:

getMaxLengthLength in interface TLVBerDecoderMBean

Returns:

The maximum bytes of the Length

getMaxTagLength

public int getMaxTagLength()

Get the actual maximum number of bytes that can be used to encode the Tag

Specified by:

getMaxTagLength in interface TLVBerDecoderMBean

Returns:

The maximum length of the Tag

isIndefiniteLengthAllowed

public boolean isIndefiniteLengthAllowed()

Tell if indefinite length form could be used for Length

Specified by:

isIndefiniteLengthAllowed in interface TLVBerDecoderMBean

Returns:

true if the Indefinite form is allowed