sk185050 / cb2json

Copybook to JSON conversion

cb2json

Copybook to JSON conversion.

This library converts a fixed-width data stream into its JSON equivalent using a Copybook to define both structures.

Install

git clone https://github.com/devstopfix/cb2java.git
cd cb2java
mvn install
cd ..
git clone https://github.com/devstopfix/cb2json.git
cd cb2json
mvn install

Include the JAR file in your Java project pom.xml:

<dependency>
    <groupId>net.devstopfix.cb2json</groupId>
    <artifactId>cb2json</artifactId>
    <version>1.1</version>
</dependency>

or your Leiningen project.clj:

[net.devstopfix.cb2json/cb2json "1.1"]

Workflow

• Create an instance of the Copybook class using the CopybookParser object or the Copybooks helper
• Use the functions of CB2JSON, one parameter will be your Copybook, the others will be your input and output streams

Roadmap

This library is currently in the first of three versions. The functionality remains the same but the implementation details and performance vary:

Version 1

A simple prototype that makes many internal data conversions:

• Uses a fork of the cb2java library to parse a Copybook into a tree of cb2java Data objects
• Convert the Data tree into a POJO tree of Maps and Lists using toMap
• Convert the POJO tree to JSON using Jacksons ObjectMapper

Version 2

Possible improvements:

• skip the conversion from Data to POJOs
• write the data directly to the Jackson streaming API

Version 3

• Make one pass over the Copybook stream, do not generate the intermediate cb2java Data objects but write JSON directly to the output stream using Jackson streaming API