package org.bouncycastle.asn1;
import java.io.IOException;
Parser for indefinite-length tagged objects.
/**
* Parser for indefinite-length tagged objects.
*/
public class BERTaggedObjectParser
implements ASN1TaggedObjectParser
{
private boolean _constructed;
private int _tagNumber;
private ASN1StreamParser _parser;
BERTaggedObjectParser(
boolean constructed,
int tagNumber,
ASN1StreamParser parser)
{
_constructed = constructed;
_tagNumber = tagNumber;
_parser = parser;
}
Return true if this tagged object is marked as constructed.
Returns: true if constructed, false otherwise.
/**
* Return true if this tagged object is marked as constructed.
*
* @return true if constructed, false otherwise.
*/
public boolean isConstructed()
{
return _constructed;
}
Return the tag number associated with this object.
Returns: the tag number.
/**
* Return the tag number associated with this object.
*
* @return the tag number.
*/
public int getTagNo()
{
return _tagNumber;
}
Return an object parser for the contents of this tagged object.
Params: - tag – the actual tag number of the object (needed if implicit).
- isExplicit – true if the contained object was explicitly tagged, false if implicit.
Throws: - IOException – if there is an issue building the object parser from the stream.
Returns: an ASN.1 encodable object parser.
/**
* Return an object parser for the contents of this tagged object.
*
* @param tag the actual tag number of the object (needed if implicit).
* @param isExplicit true if the contained object was explicitly tagged, false if implicit.
* @return an ASN.1 encodable object parser.
* @throws IOException if there is an issue building the object parser from the stream.
*/
public ASN1Encodable getObjectParser(
int tag,
boolean isExplicit)
throws IOException
{
if (isExplicit)
{
if (!_constructed)
{
throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
}
return _parser.readObject();
}
return _parser.readImplicit(_constructed, tag);
}
Return an in-memory, encodable, representation of the tagged object.
Throws: - IOException – if there is an issue loading the data.
Returns: an ASN1TaggedObject.
/**
* Return an in-memory, encodable, representation of the tagged object.
*
* @return an ASN1TaggedObject.
* @throws IOException if there is an issue loading the data.
*/
public ASN1Primitive getLoadedObject()
throws IOException
{
return _parser.readTaggedObject(_constructed, _tagNumber);
}
Return an ASN1TaggedObject representing this parser and its contents.
Returns: an ASN1TaggedObject
/**
* Return an ASN1TaggedObject representing this parser and its contents.
*
* @return an ASN1TaggedObject
*/
public ASN1Primitive toASN1Primitive()
{
try
{
return this.getLoadedObject();
}
catch (IOException e)
{
throw new ASN1ParsingException(e.getMessage());
}
}
}