com.lowagie.bc.asn1
Class ASN1TaggedObject

java.lang.Object
  extended by com.lowagie.bc.asn1.DERObject
      extended by com.lowagie.bc.asn1.ASN1TaggedObject
All Implemented Interfaces:
DEREncodable, DERTags
Direct Known Subclasses:
DERTaggedObject

public abstract class ASN1TaggedObject
extends DERObject

ASN.1 TaggedObject - in ASN.1 nottation this is any object proceeded by a [n] where n is some number - these are assume to follow the construction rules (as with sequences).


Field Summary
 
Fields inherited from interface com.lowagie.bc.asn1.DERTags
APPLICATION, BIT_STRING, BMP_STRING, BOOLEAN, CONSTRUCTED, ENUMERATED, EXTERNAL, GENERAL_STRING, GENERALIZED_TIME, GRAPHIC_STRING, IA5_STRING, INTEGER, NULL, NUMERIC_STRING, OBJECT_IDENTIFIER, OCTET_STRING, PRINTABLE_STRING, SEQUENCE, SEQUENCE_OF, SET, SET_OF, T61_STRING, TAGGED, UNIVERSAL_STRING, UTC_TIME, UTF8_STRING, VIDEOTEX_STRING, VISIBLE_STRING
 
Constructor Summary
ASN1TaggedObject(boolean explicit, int tagNo, DEREncodable obj)
           
ASN1TaggedObject(int tagNo, DEREncodable obj)
           
 
Method Summary
 boolean equals(Object o)
           
static ASN1TaggedObject getInstance(ASN1TaggedObject obj, boolean explicit)
           
 DERObject getObject()
          return whatever was following the tag.
 int getTagNo()
           
 int hashCode()
           
 boolean isEmpty()
           
 boolean isExplicit()
          return whether or not the object may be explicitly tagged.
 
Methods inherited from class com.lowagie.bc.asn1.DERObject
getDERObject
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ASN1TaggedObject

public ASN1TaggedObject(int tagNo,
                        DEREncodable obj)
Parameters:
tagNo - the tag number for this object.
obj - the tagged object.

ASN1TaggedObject

public ASN1TaggedObject(boolean explicit,
                        int tagNo,
                        DEREncodable obj)
Parameters:
explicit - true if the object is explicitly tagged.
tagNo - the tag number for this object.
obj - the tagged object.
Method Detail

getInstance

public static ASN1TaggedObject getInstance(ASN1TaggedObject obj,
                                           boolean explicit)

equals

public boolean equals(Object o)
Overrides:
equals in class Object

hashCode

public int hashCode()
Overrides:
hashCode in class Object

getTagNo

public int getTagNo()

isExplicit

public boolean isExplicit()
return whether or not the object may be explicitly tagged.

Note: if the object has been read from an input stream, the only time you can be sure if isExplicit is returning the true state of affairs is if it returns false. An implicitly tagged object may appear to be explicitly tagged, so you need to understand the context under which the reading was done as well, see getObject below.


isEmpty

public boolean isEmpty()

getObject

public DERObject getObject()
return whatever was following the tag.

Note: tagged objects are generally context dependent if you're trying to extract a tagged object you should be going via the appropriate getInstance method.



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