com.objsys.asn1j.runtime
Class Asn1Tag

java.lang.Object
  com.objsys.asn1j.runtime.Asn1Tag

All Implemented Interfaces:

java.io.Serializable

public class Asn1Tag
extends java.lang.Object
implements java.io.Serializable

This is a container class for holding the components of an ASN.1 tag value.

See Also:

Serialized Form

Field Summary

static short	APPL Mask value for an APPLICATION tag
static short	Bit8Mask Bit 8 (MSB) octet mask value
static short	ClassMask Mask value to mask the class bits from a tag
static short	CONS Mask value for CONSTRUCTED form
static short	CTXT Mask value for a context-specific tag
static Asn1Tag	ENUM ASN.1 ENUMERATED type tag value
static Asn1Tag	EOC ASN.1 end-of-contents (EOC) type tag value
static boolean	EXPL This specifies that explicit tagging should be used.
static short	EXTIDCODE Mask value for extended tag identifier indicator
static short	FormMask Mask value to mask the form bit from a tag
static short	IDMask Mask value to mask the tag ID bits from a tag
static boolean	IMPL This specifies that implicit tagging should be used.
static short	L7BitsMask Lower 7 bits octet mask value
short	mClass Tag class value (UNIV, APPL, CTXT, or PRIV)
short	mForm Tag form value (PRIM or CONS)
int	mIDCode Tag ID code
static short	PRIM Mask value for PRIMITIVE form
static short	PRIV Mask value for a PRIVATE tag
static Asn1Tag	SEQUENCE ASN.1 SEQUENCE type tag value
static Asn1Tag	SET ASN.1 SET type tag value
static short	UNIV Mask value for a UNIVERSAL tag

Constructor Summary

Asn1Tag()
The default constructor initializes all fields to zero.

Asn1Tag(Asn1Tag _tag)
The copy constructor initializes all fields to those from the given tag parameter.

Asn1Tag(short class_, short form, int idCode)
This constructor initializes all fields to the given values

Method Summary

boolean	equals(java.lang.Object _tag) This method compares this tag with the given tag value for equality.
boolean	equals(short class_, short form, int idCode) This method compares this tag with the given tag value for equality.
boolean	isConstructed() This method tests if the tag is constructed.
boolean	isEOC() This method tests if the tag is an end-of-contents (EOC) tag.
java.lang.String	toString() This method will return a formatted string representing the tag value.

Methods inherited from class java.lang.Object

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

Field Detail

EXPL

public static final boolean EXPL

This specifies that explicit tagging should be used.

See Also:

Constant Field Values

IMPL

public static final boolean IMPL

This specifies that implicit tagging should be used.

See Also:

Constant Field Values

UNIV

public static final short UNIV

Mask value for a UNIVERSAL tag

See Also:

Constant Field Values

APPL

public static final short APPL

Mask value for an APPLICATION tag

See Also:

Constant Field Values

CTXT

public static final short CTXT

Mask value for a context-specific tag

See Also:

Constant Field Values

PRIV

public static final short PRIV

Mask value for a PRIVATE tag

See Also:

Constant Field Values

ClassMask

public static final short ClassMask

Mask value to mask the class bits from a tag

See Also:

Constant Field Values

PRIM

public static final short PRIM

Mask value for PRIMITIVE form

See Also:

Constant Field Values

CONS

public static final short CONS

Mask value for CONSTRUCTED form

See Also:

Constant Field Values

FormMask

public static final short FormMask

Mask value to mask the form bit from a tag

See Also:

Constant Field Values

EXTIDCODE

public static final short EXTIDCODE

Mask value for extended tag identifier indicator

See Also:

Constant Field Values

IDMask

public static final short IDMask

Mask value to mask the tag ID bits from a tag

See Also:

Constant Field Values

ENUM

public static final Asn1Tag ENUM

ASN.1 ENUMERATED type tag value

EOC

public static final Asn1Tag EOC

ASN.1 end-of-contents (EOC) type tag value

SEQUENCE

public static final Asn1Tag SEQUENCE

ASN.1 SEQUENCE type tag value

SET

public static final Asn1Tag SET

ASN.1 SET type tag value

Bit8Mask

public static final short Bit8Mask

Bit 8 (MSB) octet mask value

See Also:

Constant Field Values

L7BitsMask

public static final short L7BitsMask

Lower 7 bits octet mask value

See Also:

Constant Field Values

mClass

public transient short mClass

Tag class value (UNIV, APPL, CTXT, or PRIV)

mForm

public transient short mForm

Tag form value (PRIM or CONS)

mIDCode

public transient int mIDCode

Tag ID code

Constructor Detail

Asn1Tag

public Asn1Tag()

The default constructor initializes all fields to zero.

Asn1Tag

public Asn1Tag(Asn1Tag _tag)

The copy constructor initializes all fields to those from the given tag parameter.

Parameters:

tag - The input tag value to copy.

Asn1Tag

public Asn1Tag(short class_,
               short form,
               int idCode)

This constructor initializes all fields to the given values

Parameters:

class_ - Tag class value (UNIV, APPL, CTXT, or PRIV)

form - Tag form value (PRIM or CONS)

idCode - Tag identifier code

Method Detail

equals

public boolean equals(short class_,
                      short form,
                      int idCode)

This method compares this tag with the given tag value for equality.

Parameters:

class_ - Tag class value (UNIV, APPL, CTXT, or PRIV)

form - Tag form value (PRIM or CONS)

idCode - Tag identifier code

Returns:

True if tags are equal

equals

public boolean equals(java.lang.Object _tag)

This method compares this tag with the given tag value for equality.

Overrides:

equals in class java.lang.Object

Parameters:

tag - Asn1Tag object to which this tag is to be compared

Returns:

True if tags are equal

isConstructed

public boolean isConstructed()

This method tests if the tag is constructed.

Returns:

True if tag is constructed.

isEOC

public boolean isEOC()

This method tests if the tag is an end-of-contents (EOC) tag.

Returns:

True if tag is an EOC.

toString

public java.lang.String toString()

This method will return a formatted string representing the tag value. The form is "[ ]" (i.e. the ASN.1 standard syntax for a tag value).

Overrides:

toString in class java.lang.Object

Returns:

Formatted tag string