com.sun.slamd.asn1
Class ASN1Null

java.lang.Object
  com.sun.slamd.asn1.ASN1Element
      com.sun.slamd.asn1.ASN1Null

public class ASN1Null
extends ASN1Element

This class defines an ASN.1 element that does not hold any value. It is generally used as a placeholder in cases where there needs to be an element to complete the encoding but there is no appropriate value to use in that case.

Author:

Neil A. Wilson

Field Summary

static ASN1Null

NULL_ELEMENT A static version of a NULL element that can be used to prevent the need to create new instances whenever a null is needed with the default type.

Fields inherited from class com.sun.slamd.asn1.ASN1Element

ASN1_BOOLEAN_TYPE, ASN1_ENUMERATED_TYPE, ASN1_INTEGER_TYPE, ASN1_NULL_TYPE, ASN1_OCTET_STRING_TYPE, ASN1_SEQUENCE_TYPE, ASN1_SET_TYPE, EMPTY_BYTES

Constructor Summary

ASN1Null()
Creates a new ASN.1 null element.

ASN1Null(byte type)
Creates a new ASN.1 null element with the specified type.

Method Summary

static ASN1Null	decodeAsNull(byte[] encodedValue) Decodes the provided byte array as an ASN.1 null element.
byte[]	encode() Encodes this ASN.1 element into a byte array.

Methods inherited from class com.sun.slamd.asn1.ASN1Element

byteArrayToInt, byteArrayToString, byteArrayToString, byteArrayToStringWithASCII, byteArrayToStringWithASCII, decode, decodeAsBoolean, decodeAsBoolean, decodeAsEnumerated, decodeAsEnumerated, decodeAsInteger, decodeAsInteger, decodeAsNull, decodeAsOctetString, decodeAsOctetString, decodeAsSequence, decodeAsSequence, decodeAsSet, decodeAsSet, decodeLength, encode, encodeLength, getBytes, getType, getTypeWithoutFlags, getValue, setType, setValue, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

NULL_ELEMENT

public static final ASN1Null NULL_ELEMENT

A static version of a NULL element that can be used to prevent the need to create new instances whenever a null is needed with the default type.

Constructor Detail

ASN1Null

public ASN1Null()

Creates a new ASN.1 null element.

ASN1Null

public ASN1Null(byte type)

Creates a new ASN.1 null element with the specified type.

Parameters:

type - The BER type to assign to this ASN.1 element.

Method Detail

encode

public byte[] encode()

Encodes this ASN.1 element into a byte array.

Overrides:

encode in class ASN1Element

Returns:

This ASN.1 element encoded as a byte array.

decodeAsNull

public static ASN1Null decodeAsNull(byte[] encodedValue)
                             throws ASN1Exception

Decodes the provided byte array as an ASN.1 null element.

Parameters:

encodedValue - The encoded ASN.1 element.

Returns:

The decoded ASN.1 null element.

Throws:

ASN1Exception - If the provided byte array cannot be decoded as an ASN.1 null element.