Example cobol copy book parser

My input file has the records i need to parse in the field indbctext. Clean up the copybook by processing redefines statements and remove unused definitions. An example cobol copybook source file is shown in listing 21. Conference in the cloud a perl and raku conf 5,200 views. Cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sablecc parser generator. This app parses the copybook and provides the below information. Hi, i am trying to parse an input file using cobol. For example, two instances of year become year and year1. Cobol copybook to xml converter cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sable. Cobol names are converted to json names according to the following rules. Cobol translator creates the tree of all sections in the program so that the user can easily understand the flow. You could use the javabased proleap cobol parser to extract all kinds of data from cobol files such as level numbers, picture strings etc.

What are some things that i could improve with my python coding and parser design. This example is referenced in this documentation to explain how ibm record generator for java processes cobol data structures. This project already worked out some java code to parse a cobol copybook and convert it into an xml representation. While i am parsing in bw using the cobol copy book plugin, i am getting the. The xml document is shown in the program source to make it easier to follow the flow of the parsing. Next, we will use the parser in a cascading application to read sample data. This app is designed to parse the cobol copybook and present the data in a useful format. Parse the copybook into a usable format to use in python. Example cobol copybook here is an example of a cobol data structure.

In this tutorial, we will develop a parser for translating one specific set of copybooks. Generating a java application with the egen application generator. This pythonbased cobol copybook parser command accepts stdin or a filename, it reads in the copybook text file and returns csv to stdout in the following format. The proleap cobol parser is licensed under an open source license, so it can be used for free. Duplicate names are made unique by the addition of one or more numeric digits. The json parse statement converts json text to cobol data formats. Coverts cobol types to java types and back to cobol types with validation.

It matches the json namevalue pairs to cobol identifiers, and then populates them. Parse cobol copybook files into json using python more info. It does this by parsing an egen script file containing a dataview definition similar to the. Supports parsing and writing of application data based on parsed copybooks. Strings of contiguous hyphens are replaced by contiguous underscores. Field name concatenated names based on level hierarchy data type integer, float, double or bcd field length implied decimal position unitbased, i. Level this is the level number of fields in the copybook. For example, if an element in a copybook is defined as being a 6 digit integer, you will most likely end up using an int. Basically, i need to capture words which come after from. For example, the copy in the programm cobol could be. Scalable cobol copybook data processing using cascading. This example shows the parsing of an xml document, and a processing procedure that reports the various xml events and their associated text fragments. I dont know anything about parsers but i had to write something to read cobol for a work project.