net.sf.scuba.tlv

Class TLVUtil

java.lang.Object

net.sf.scuba.tlv.TLVUtil

All Implemented Interfaces:

ASN1Constants

public class TLVUtil
extends java.lang.Object
implements ASN1Constants

Static helper utilities for the TLV streams and states.

Field Summary

Fields inherited from interface net.sf.scuba.tlv.ASN1Constants

APPLICATION_CLASS, BIT_STRING_TYPE_TAG, BMP_STRING_TYPE_TAG, BOOLEAN_TYPE_TAG, CONTEXT_SPECIFIC_CLASS, EMBEDDED_PDV_TYPE_TAG, ENUMERATED_TYPE_TAG, EXTERNAL_TYPE_TAG, GENERAL_STRING_TYPE_TAG, GENERALIZED_TIME_TYPE_TAG, GRAPHIC_STRING_TYPE_TAG, IA5_STRING_TYPE_TAG, INTEGER_TYPE_TAG, NULL_TYPE_TAG, NUMERIC_STRING_TYPE_TAG, OBJECT_DESCRIPTOR_TYPE_TAG, OBJECT_IDENTIFIER_TYPE_TAG, OCTET_STRING_TYPE_TAG, PRINTABLE_STRING_TYPE_TAG, PRIVATE_CLASS, REAL_TYPE_TAG, SEQUENCE_TYPE_TAG, SET_TYPE_TAG, T61_STRING_TYPE_TAG, UNIVERSAL_CLASS, UNIVERSAL_STRING_TYPE_TAG, UTC_TIME_TYPE_TAG, UTF8_STRING_TYPE_TAG, VISIBLE_STRING_TYPE_TAG

Method Summary

Modifier and Type	Method and Description
static byte[]	getLengthAsBytes(int length) The length bytes of this object.
static int	getLengthLength(int length)
static byte[]	getTagAsBytes(int tag) The tag bytes of this object.
static int	getTagLength(int tag)
static boolean	isPrimitive(int tag)
static byte[]	unwrapDO(int expectedTag, byte[] wrappedData) TLV decodes tagged TLV data object.
static byte[]	wrapDO(int tag, byte[] data) TLV encodes an encoded data object with a tag.

Methods inherited from class java.lang.Object

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

Method Detail

isPrimitive

public static boolean isPrimitive(int tag)

getTagLength

public static int getTagLength(int tag)

getLengthLength

public static int getLengthLength(int length)

getTagAsBytes

public static byte[] getTagAsBytes(int tag)

The tag bytes of this object.

Parameters:

tag - the tag

Returns:

the tag bytes of this object.

getLengthAsBytes

public static byte[] getLengthAsBytes(int length)

The length bytes of this object.

Parameters:

length - the length

Returns:

length of encoded value as bytes

wrapDO

public static byte[] wrapDO(int tag,
                            byte[] data)

TLV encodes an encoded data object with a tag.

Parameters:

tag - the tag

data - the data to encode

Returns:

the TLV encoded data

unwrapDO

public static byte[] unwrapDO(int expectedTag,
                              byte[] wrappedData)

TLV decodes tagged TLV data object.

Parameters:

expectedTag - the tag to expect, an IllegalArgumentException will be throws if a different tag is read

wrappedData - the encoded data

Returns:

the decoded data