CodeGen Example 1 modified by Bruce Martin

Bruce Martin — Sun, 21 Jul 2019 01:37:25 -0000

--- v1
+++ v2
@@ -44,11 +44,15 @@

 ## Generating using the RecordEditor

-* Select the **Generate >>> Java JRecord code for Cobol** Option
+* Select the **Generate >>> Java JRecord code for Cobol** 
+![](https://sourceforge.net/p/jrecord/wiki/CodeGen%20Example%201/attachment/Mdt01.png)
 * Select the Cobol copybook and click the **Generte JRecord Button**
+![](https://sourceforge.net/p/jrecord/wiki/CodeGen%20Example%201/attachment/Mdt02.png)
 * Enter the directory holding the template directories. So if directory structure is
 **/MyTemplates/MdtTemplate** you would enter **MyTemplates** in this field and the **MdtTemplate** + any other Template directories
 in the *MyTemplates* will be listed in the Template Combo box below it.
+![](https://sourceforge.net/p/jrecord/wiki/CodeGen%20Example%201/attachment/Mdt03.png)
+

 ## Generating CodeGen

CodeGen Example 1 modified by Bruce Martin

Bruce Martin — Sun, 21 Jul 2019 01:30:45 -0000

CodeGen Templates

A codeGen Template is a directory with

Generate.properties control file
An Xml file listing the Velocity templates and there output names
One or more Velocity templates

Mdt Template

The MDT template is for Cobol copybooks where every logical field consists of
2 logical fields:

A Mdt field that indicates if the Field is present
The Data field

So in the AAA-MDT is the flag indicates if the AAA is present or not

         20  AAA-MDT     PIC X(01).
         20  AAA         PIC X(03).
         20  BBB-MDT     PIC X(01).
         20  BBB         PIC X(03).

The Mdt Template generates a "field* for each logical field.
The above will generate

    public IStringField getAAA() { ... }
    public IStringField getBBB() { ... }

Mdt Template principles

One of the principles is to keep the Velocity Templates as simple as possible and move as much
code as possible into support classes.
The Support code is in the SupportJavaSource directory

Support Code

Some important classes

Generating using the RecordEditor

Select the Generate >>> Java JRecord code for Cobol Option
Select the Cobol copybook and click the Generte JRecord Button
Enter the directory holding the template directories. So if directory structure is
/MyTemplates/MdtTemplate you would enter MyTemplates in this field and the MdtTemplate + any other Template directories
in the MyTemplates will be listed in the Template Combo box below it.

Generating CodeGen

if you download the standalone version of CodeGen
you can generate the skel using bat/shell script:

java -jar ../lib/JRecordCodeGen.jar  ^
              -TemplateDirectory  CodeGenExample ^
              -Template           MdtTemplate ^
              -Schema             LKSA310I_Opp101_RequestFormat.cbl  ^
              -Package            MdtTest.code  ^
              -outputDirectory    MdtOut

Recent changes to CodeGen Example 1

CodeGen Example 1 modified by Bruce Martin

CodeGen Example 1 modified by Bruce Martin

CodeGen Templates

Mdt Template

Mdt Template principles

Support Code

Generating using the RecordEditor

Generating CodeGen