• ASN.1 Tools
  • ASN1C ASN.1 Compiler
  • ASN.1 Viewer/Editor
  • ASN.1 to Text Translator
• XML
  • XBinder^™ Schema Compiler
• Prebuilt API's
  • 5G/LTE ASN.1 API's
  • 5G/LTE NAS API's
  • V2X API
  • CSTA .NET DLL and API's
  • TAP3 DLL
  • Objective Open Source
• Web Tools
  • 5G/LTE NAS Decoder
  • ASN.1 Syntax Check
  • ASN.1 Data to XML/JSON
  • ASN.1 Syntax to XSD
• Services
  • Custom API's
  • Custom Software
  • CDR Solutions
  • Training

ASN.1 to Java

The ASN1C ASN.1 compiler can generate Java source code for encoding and decoding ASN.1 messages. The following ASN.1 encoding rules are supported:

• BER/DER/CER
• PER - aligned (APER) and unaligned (UPER)
• OER (including canonical COER)
• XER and OSys XML
• JSON-ER

Generated Java encoders/decoders and run-time are a 100% pure Java solution for encoding an decoding ASN.1-based messages.

The generated Java code consists of a series of Java source files - one for each production (type) defined within an ASN.1 specification. Each of these Java files contains (at a minimum) the following items:

• A public member data variable (or variables) to hold data of the generated type.
• A constructor (or constructors) to initialize the variable.
• An encode method.
• A decode method.
• A print method to print the contents of the object to a given output stream.

There is also a run-time library for Java. This consists of a series of classes for encoding and decoding the primitive ASN.1 types. For example, the Asn1Integer class will encode or decode a variable of the ASN.1 INTEGER type. The compiler will extend these base classes to form higher level types derived directly from the base types, or assemble a series of these lower level objects to form constructed types (SEQUENCE, for example).

Features

• Intuitive mapping between ASN.1 type and Java classes.
• In-memory and stream-based encoding and decoding.
• Support for Java Micro Edition Connected Limited Device Configuration (CLDC)
• Supports generation of utility functions to print, compare, and copy data in generated structures.
• Supports generation of random test data and reader and writer programs
• Supports generation of ant build.xml files to build generated code as well as support for Maven and Gradle build frameworks.
• Comprehensive ASN.1 feature coverage including support for table constraints, content constraints, extension element groups, all ASN.1 types, and ASN.1 value notation.
• SAX-like event handler interface allows for user-defined callbacks
• NAS extensions make it possible to generate Java code to support 3GPP layer 3 messages using a specially constructed ASN.1 specification.