Start with cb2java

[juanouton]

Hello. I need help for running cb2java. I don´r know how to use this jar file.
I´m using eclipse (3.2) and i have imported the jar file like a plugin but it doesn't work.
Please i need to know how to use it.
Thanks

[dubwai]

The first thing to realize is that this is not a plugin or any kind of gui editor for application data.  This is a library that you would include a Java application that needs to work with COBOL copybook defined application data.

If you are looking for a GUI, look at the RecordEditor project here on sourceforge.

Otherwise, if you want to use this in an application, you just need to add it to your classpath.

Here's a short example to help get started.  I've gotten a few questions like this lately so I am going to get some documentation up shortly.

    import net.sf.cb2java.copybook.*;
    import net.sf.sb2java.copybook.data.*;

    public static void main(String[] args)
    {
        Copybook document = parse("simple", new
FileReader("simple.cpy"));
                       
        Record documentData = document.parseData(new
FileInputStream("simple.data"));
           
        recurse(documentData, "");
    }

    static void recurse(GroupData group, String indent)
    {
        for (Iterator i = group.getChildren().iterator();
i.hasNext();) {
            Data data = (Data) i.next();
    
            System.out.print(indent + data.getName() + ": ");

            if (data.isLeaf()) {
                System.out.println(data.getValue());
            } else {
                System.out.println();
                recurse((GroupData) data, indent + "  ");
            }
        }
    }

[dubwai]

I uploaded the Javadocs under the 0.3.1 version.  This should help with getting started.

[sonicaaaa]

hello. i'm not able to get cbl2java working.

with the sample code you posted, i receive this exception and i have no clue on what's the matter

Exception in thread "main" java.lang.ExceptionInInitializerError
    at net.sf.cb2java.copybook.Item.createDocument(Unknown Source)
    at net.sf.cb2java.copybook.Item.createElement(Unknown Source)
    at net.sf.cb2java.copybook.Item.getElement(Unknown Source)
    at net.sf.cb2java.copybook.CopybookAnalyzer.walkTree(Unknown Source)
    at net.sf.cb2java.copybook.CopybookAnalyzer.outARecordDescription(Unknown Source)
    at net.sf.cb2xml.sablecc.analysis.DepthFirstAdapter.caseARecordDescription(DepthFirstAdapter.java:57)
    at net.sf.cb2xml.sablecc.node.ARecordDescription.apply(ARecordDescription.java:33)
    at net.sf.cb2xml.sablecc.analysis.DepthFirstAdapter.caseStart(DepthFirstAdapter.java:31)
    at net.sf.cb2xml.sablecc.node.Start.apply(Start.java:30)
    at net.sf.cb2java.copybook.CopybookParser.parse(Unknown Source)
    at jsp.test.testCBL2Java.main(testCBL2Java.java:22)

do you have any clue? just wanna add that the copy is handled correctly by RecordEditor

thanks

sonica

[dubwai]

Can you provide the copy that you are attempting to parse?  Also, is there a cause in the stack trace?  I can't see where the error occurred exactly.  I can't really see what would go wrong in the code that it's pointing to.

thanks,

-James

[gopi]

By using a code I have parsed cobol copy file ie I am able to retrieve child elements from groups. Now I am unable to detect data types of cobol copy file how can I do this using cb2java.