Cobol copybook to json

There is no builtin policy today that parses a cobol copybook payload and extracts the information and transforms it into xml or json. Use of end json allows a conditional json generate statement that is, a json generate statement that specifies the on exception or not on exception phrase to be nested in another conditional statement. I dont know anything about parsers but i had to write something to read cobol for a work project. We are trying to implement json in cics from cobol but keep getting some weird things going on. The dfhls2js utility incorrectly generates a json schema that contains an array element with matching min and max items values for a cobol occurs depending on element when the minimum specified number of occurrences value is 0 or 1. But due to my copybook using redefine clause i am unable to get the required format. There is a common numeric data type used in cobol called signed also called ibm signed, or zoned. A cobol copybook is a selection of code that defines data structures.

Cobol copybook to xml converter cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sable. The json web services assistant with parameters mappingmodels2js and langcobol will map between cobol data structures and. A cobol copybook is a file that contains cobol source code and is used to synchronize that code among various cobol programs. If a particular data structure is used in many programs, then instead of writing the same data structure again, we can use copybooks. If data is returned as a json string, the keyvalue pairs encoded within the string are not recognized as separate entities, so you must use the json parser to convert the string into a json object to make the data accessible for subsequent use. This library converts a fixedwidth data stream into its json equivalent using a copybook to define both structures. Cobol data structures copybooks and c variables header files from json. Using the example chapter 11 in redbook implementing ibm cics json web services for mobile applications. Surprisingly, the tiobe index for october 2016 lists cobol as the 24th most popular language, between dart and scratch. Need help in using hwtjpars in cobol for parsing json data. Cobol has had xml parsing for a while, and has generation. Xml thunder generates all of the cobol code required to work with xml in your cobol and c programs.

The redvers cobol json interface operates at record level, intelligently building. Parse the copybook into a usable format to use in python. Using a modeldriven development approach and json thunders visual designer, the power is in the coders hands to create a mapping of cobol. Compilation at client sites enables installation on multiple platforms and ensures complete compatibility with all other cobol applications on the platform. Sign in sign up instantly share code, notes, and snippets. This is a cobol copybook parser in python featuring the following options.

We use the copy statement to include a copybook in a program. This isnt cobol feature complete yet, just the things i need for the project. To xmlenable your program, you need to either rename recordcbl2xml. With cobol lsps latest release, you can define the copybook library in settings. Calling a restful api from a cics application mainframe dev. The end json phrase is the scope terminator that delimits the scope of the statement. Data description items with level numbers of 66 and 77 are not supported. Once the table is generated i can upload a file into my program and it will read, convert from imb37 and insert the file into that sql table. This brief article takes a quick look at the fixed width data to json transformation using copybook. Jul 23, 2010 json to cobol it turns out it is fairly simple to transform json strings to cobol using legstar and jackson. Qtassistant provides the ability to convert a cobol copybook containing data description etnries into an xml schema.

Cobol data description elements that are not shown in the table are not supported by json web services assistant. It can parse cobol copybooks to change them into an xml file describing perfectly all picture with a lot of useful attributes, like length or type. Everywhere visual studio code works aka windows, linux and mac osx. Contribute to devstopfixcb2json development by creating an account on github.

Wiki knowledge base for thunder suite, xml thunder and json thunder by canam software labs. For parsing this json data which is in textpad now, and we can ftp to mf, we do have th. Json thunder is designed specifically to address the challenges of working with json in cobol applications. To do this you would start from a cobol fragment and use the usual legstar cobol to xsd translator and then generate transformers using legstar cobol binding generator. The zos connect ee build toolkit is used for the generating the artifacts. Cobol represents this type of field by an s in the picture clause of a display format field, e. So enterprise cobol has native parsinggeneration for xml and native parsing for json. I am using a read file activity and pass the text to the cobol parser, where some of the special characters are getting transformed to, what i believe is a junk value.

Dataweave readers and writers setting mime types avro cobol copybook csv dataweave weave excel fixed width flat file multipart formdata java json newline delimited json octet stream text plain text java properties xml url encoding yaml see also. Hi all, based on my project requirements, i need to parse the json string into a cobol copybook and do the functional processing on them. The redvers cobol json interface gives cobol applications fast, efficient access to json objects and java applications. Cics uses cobol copybooks as data elements to store data. Levels and groups cobol layouts have levels, from level 01 to level 49. The legstar transformers are pure java and can be used directly in your code. File system csv, pos, excel, xml, json, avro, parquet, orc. A json schema specifies that a variable is optional if it does not appear in the required keyword array that is associated with the enclosing json schema object type. If you dont have an existing application, thunder also provides a sample main or calling program that can serve as the.

This project will convert cobol data files to jsonfiles using a cobol copybook. What are some things that i could improve with my python coding and parser design. But nowadays most software systems use formats such as xml, json. I have tried to convert a copybook into json format in cobol but was unable to do as the zos version 4. Fixed width data to json transformation using copybook. Conference in the cloud a perl and raku conf 5,200 views. Json support in ibm enterprise cobol for zos youtube. The detection of such cobol copybook file is not based on file extensions such as. This worked fine and i was able to get the json format.

A copybook may be included in more than one cobol program, and a program may include more than one copybook. Data services uses the source information to identify and process the cobol copybook. Writing docker microservices in cobol microservices. Select a program, copybook, include, or jcl file in the explorer to open it in the editor. Json thunder generates the cobol code required to work with json in your cobol programs. Json thunder parse, create, validate json for cobol. For detailed information on xml syntax extensions, see the topic xml syntax extensions.

Syntax highlighting for cobol, jcl, pli and mf directive files. Generate cobol, c and java code in a fraction of the time it takes to handwrite it with thunder, a modeldriven approach to code creation that gets your missioncritical programs validating, parsing and creating xml and json messages efficiently and effectively. It will also generate cobol or c code to create valid xml messages from cobol or c fields. Parsing a cobol data file against a cobol copybook tibco. A cobol field definition does not need to be entirely on one line. It will generate cobol code to validate and parse json messages into cobol.

Python code to parse and denormalize cobol copybooks. The dfhjs2ls utility program supports mappings between json schema and cobol data structures. Cobol copybook files this bridge can only import the cobol copybook files which contain the data definitions, therefore does not detect reverse engineer metadata from actual cobol data files. When converting an xml schema to cobol with xml syntax, this is the filename of an xml schema file being read by cbl2xml. Bridge specifications vendor iso tool name cobol copybook file tool version 1985 tool web s.

With the latest ibm enterprise cobol v6 compiler, you can generate and parse json documents directly from cobol. The name of that swagger document used in our example scenario is orderdispatch. The process of xmlenabling an entire cobol program is the same as that of xmlenabling a copybook. The tool is a command line tool which takes the swagger document provided by the api provider as input. Oct 14, 2016 hi all, based on my project requirements, i need to parse the json string into a cobol copybook and do the functional processing on them. Parse cobol copybook files into json using python more info. Hello everyone, i have tried to convert a copybook into json format in cobol but was unable to do as the zos version. It will generate cobol or c code to validate and parse xml messages into cobol or c fields. At runtime, mainframe data containing ebcdic, comp, etc. Dataweave output formats and writer properties mulesoft. When converting traditional cobol data structures to cobol with xml syntax, this is the filename of a cobol file being read by cbl2xml. Cobol copybook to xml converter cb2xml copybook to xml is a cobol copybook to xml converter. Developed in 1959 before most of todays developers were born including me, seen by many as uncool.

The redvers cobol json interface programs are sold in cobol source code form and are installed by copying to your site source code library and running your standard cobol compiler. With the syntax highlighting capability, you can quickly distinguish between cobol and pli reserved words, comments, constants, and variables. The json web services assistant maps cobol data description elements to schema elements according to the following table. For parsing this json data which is in textpad now, and we can ftp to mf, we do have the required modules hwtjparshwtjinit in our library. Copy statement is used in the workingstorage section. Copybooks often contain the name and data types of variables that associated cobol programs, such as cics.

File system csv, pos, excel, xml, json, avro, parquet. One of the project goals is to create utilities that convert between an xml instance file and its cobol copybook equivalent string buffer. This saved me weeks of hard work on copybook parsing and interpreting. The dfhls2js utility program supports mappings between cobol data structures and json schema definitions. A signed field is composed of regular numeric characters, one character per byte, for all digits except the one that holds the sign. This offtheshelf software is written in pure cobol and simply requires the coding of a cobol record layout and call statement to generate or parse any json object. Nov 16, 2017 with the latest ibm enterprise cobol v6 compiler, you can generate and parse json documents directly from cobol. Cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sablecc parser generator.

Cobol tab stops can be changed by editing the coboleditor. I am trying to parse a cobol data file against a cobol copybook using cobol copybook plugin. Complete the source options when you use the cobol copybook as a source in a data flow. For json parsing parsing only so far it also uses the existing zos system service.