codec.asn1
Class DefinedByResolver

java.lang.Object
  |
  +--codec.asn1.DefinedByResolver

All Implemented Interfaces:

Resolver

public class DefinedByResolver

extends Object

implements Resolver

This interface is used by the ASN1OpenType in order to resolve the ASN.1 type to decode at runtime. Concrete implementations of this interface can be used to model references to type classes as well or to compensate for the superseded ASN.1 ANY DEFINED BY type.

Implementations shall determine and return the correct ASN.1 type to be decoded in the defined method.

Version:

"$Id: DefinedByResolver.java,v 1.2 2000/12/06 17:47:28 vroth Exp $"

Author:

Volker Roth

Constructor Summary

DefinedByResolver(ASN1ObjectIdentifier oid)
Creates an instance that resolves the given OID against the global OID registry.

DefinedByResolver(OIDRegistry registry, ASN1ObjectIdentifier oid)
Creates an instance that attempts to resolve the given OID against the given registry upon calling resolve.

Method Summary

ASN1Type

resolve(ASN1Type caller) Looks up the private OID in the private registry and returns the resolved ASN.1 type.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefinedByResolver

public DefinedByResolver(OIDRegistry registry,
                         ASN1ObjectIdentifier oid)

Creates an instance that attempts to resolve the given OID against the given registry upon calling resolve. The OID instance used or resolving is the one passed to this constructor. Hence, an OID can be added to a compound ASN.1 type and an ASN1OpenType can be initialized with this. If the OID is decoded before the open type then the open type is resolved against the given registry and the decoded OID. In other words the ASN.1 ANY DEFINED BY type can be modelled with an ASN1OpenType and an instance of this resolver class.

Parameters:

registry - The registry to resolve the given OID against.

oid - The oid instance to use when resolving.

DefinedByResolver

public DefinedByResolver(ASN1ObjectIdentifier oid)

Creates an instance that resolves the given OID against the global OID registry.

Parameters:

oid - The OID to resolve.

Method Detail

resolve

public ASN1Type resolve(ASN1Type caller)
                 throws ResolverException

Looks up the private OID in the private registry and returns the resolved ASN.1 type. If the OID cannot be resolved against the registry then an exception is thrown.

Specified by:

resolve in interface Resolver

Parameters:

caller - The calling ASN.1 type.

Throws:

ResolverException - if the private OID cannot be mapped onto an ASN.1 type by the private registry.