com.unboundid.asn1
Class ASN1Null

java.lang.Object
  com.unboundid.asn1.ASN1Element
      com.unboundid.asn1.ASN1Null

All Implemented Interfaces:

java.io.Serializable

@NotMutable
@ThreadSafety(level=COMPLETELY_THREADSAFE)
public final class ASN1Null
extends ASN1Element

This class provides an ASN.1 null element, which does not hold a value. Null elements are generally used as placeholders that can be substituted for other types of elements.

See Also:

Serialized Form

Field Summary

static ASN1Null

UNIVERSAL_NULL_ELEMENT A pre-allocated ASN.1 null element with the universal null BER type.

Constructor Summary

ASN1Null()
Creates a new ASN.1 null element with the default BER type.

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

Method Summary

static ASN1Null	decodeAsNull(ASN1Element element) Decodes the provided ASN.1 element as a null element.
static ASN1Null	decodeAsNull(byte[] elementBytes) Decodes the contents of the provided byte array as a null element.
void	toString(java.lang.StringBuilder buffer) Appends a string representation of this ASN.1 element to the provided buffer.

Methods inherited from class com.unboundid.asn1.ASN1Element

decode, decodeAsBoolean, decodeAsEnumerated, decodeAsInteger, decodeAsLong, decodeAsNull, decodeAsOctetString, decodeAsSequence, decodeAsSet, encode, encodeLength, encodeTo, equals, equalsIgnoreType, getType, getValue, getValueLength, hashCode, readFrom, readFrom, toString, writeTo

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNIVERSAL_NULL_ELEMENT

public static final ASN1Null UNIVERSAL_NULL_ELEMENT

A pre-allocated ASN.1 null element with the universal null BER type.

Constructor Detail

ASN1Null

public ASN1Null()

Creates a new ASN.1 null element with the default BER type.

ASN1Null

public ASN1Null(byte type)

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

Parameters:

type - The BER type to use for this ASN.1 null element.

Method Detail

decodeAsNull

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

Decodes the contents of the provided byte array as a null element.

Parameters:

elementBytes - The byte array to decode as an ASN.1 null element.

Returns:

The decoded ASN.1 null element.

Throws:

ASN1Exception - If the provided array cannot be decoded as a null element.

decodeAsNull

public static ASN1Null decodeAsNull(ASN1Element element)
                             throws ASN1Exception

Decodes the provided ASN.1 element as a null element.

Parameters:

element - The ASN.1 element to be decoded.

Returns:

The decoded ASN.1 null element.

Throws:

ASN1Exception - If the provided element cannot be decoded as a null element.

toString

public void toString(java.lang.StringBuilder buffer)

Appends a string representation of this ASN.1 element to the provided buffer.

Overrides:

toString in class ASN1Element

Parameters:

buffer - The buffer to which to append the information.