ASN.1/Java Compiler

You can have it all - speed, flexibility, and a rich feature set. The OSS ASN.1/Java Compiler accepts one or more input files, each containing one or more ASN.1 modules. The OSS ASN.1/Java compiler is a compiled (not interpreted) executable, therefore capable of extremely fast ASN.1 compilation. The compiler verifies the ASN.1 specification and generates: informative diagnostic messages, Java classes for inclusion in your application, optional XSL stylesheets and/or DTD for XML encodings, and an optional ASN.1 output listing. The OSS ASN.1/Java compiler and runtime fully support ASN.1:1990, including all macros, as well as ASN.1:2002 and ASN.1:2008, including full support for contents constraints.

No matter what your application needs, a little or a lot, OSS provides it. The OSS compiler's features include generation of:

• a simple directory structure.
• Java instantiations of all ASN.1 values.
• informative diagnostic messages for any invalid ASN.1. The OSS compiler makes every attempt to recover from errors. Giving you messages for each error encountered means fewer recompilations to correct an invalid spec.
• only the Java classes (based on the ASN.1 types) that you select - modules, PDUs, metadata (i.e. tags, names, constraints). Your application is leaner, thus your development time is reduced.
• all of what you do need. Our ASN.1/Java compiler is comprehensive - not a tag or constraint is left behind.

Does your application need to do automatic decoding? Handle multiple ASN.1 versions? Work in a multi-threading environment? Does your spec contain values, extensible types and information object sets? Then you need the the full featured OSS compiler. It generates valid Java code no matter what spec you use (H323, PKCS, RANAP, NBAP are just a few of the specs that our customers use that our compiler handles with no problem).

Special features enable the OSS compiler to:

• handle even the most unusual ASN.1 specifications that strain the JVM compiler limits.
• work with third party IDEs such as emacs and Microsoft Visual Studio.
• automate the sample application process enabling you to try out our tools quickly with a minimum of effort.
• generate a batch or script file to facilitate Java compilation.

Encoder/Decoder

The encoder/decoder consists of a class called Coder, of which the essential methods are encode() and decode().

Encode() takes data placed by your application program in the compiler-generated Java classes, and converts it to a string of bytes encoded according to BER, PER (aligned or unaligned), DER, CER, XER, CXER, or E-XER. The method decode() takes a string of bytes that have been encoded according to BER, PER, DER, CER, XER, CXER, or E-XER and performs the inverse operation of the encoder, resulting in a Java object that you can easily manipulate.