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Preserve argument ordering in help sections?

Barbara Jones177129-Oct-2014

I have following arguments to add to CLI

-sbx

-CSWConfig

-stripInfo

-modelSources

-catchArchive

-swSupplierName

-modelsSWExchnage

but while displaying help it is showing these options in sorted order(as shown below) which I dont want, I want all the options to be in order as they are added.

-CatchArchive

-CSWConfig

-modelSources

-sbx

-stripInfo

-swSupplierName

privatevoid print_help() {
    String CONST_STR_CLI_INFO = "ercli.exe custzip";
    HelpFormatter formatter = new HelpFormatter();
    formatter.setOptionComparator(new Comparator() {
 
        @Override
        publicint compare(Object o1, Object o2) {
            Option op1=(Option) o1;
            Option op2=(Option) o2;
            return//what to do here?
        }
    });
    formatter.printHelp(CONST_STR_CLI_INFO, null, options, "", true);
}

javajava 
Updated on 29-Oct-2014
Barbara Jones

Barbara Jones

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1 Answers

Mark Devid

Mark Devid

29-Oct-2014

As the Options() class stores the options in Maps internally, it does not keep any ordering. That means you need to provide your own order as you already found out.

To get the ordering, you can put the keys in a List upfront to have an index of required order for each element:

final List<String> optionKeys = new ArrayList<>();
        optionKeys.add("sbx");
        optionKeys.add("CSWConfig");
        optionKeys.add("stripInfo");
        optionKeys.add("modelSources");
        optionKeys.add("catchArchive");
        optionKeys.add("swSupplierName");
        optionKeys.add("modelsSWExchnage");


Then in the Comparator you can compare by index in this list:

@Override
    public int compare(Object o1, Object o2) {
        Option op1=(Option) o1;
        Option op2=(Option) o2;
        return Integer.compare(optionKeys.indexOf(op1.getLongOpt()), optionKeys.indexOf(op1.getLongOpt()));
    }

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