[Insight-users] Problem with MetaCommand function: GetValueAsList

[Subrahmanyam Gorthi]

Dear All,

I am trying to read command-line argument using ITK's <metaCommand.h>.
I have problems in setting default values for a LIST.
Even though I am setting default values using AddOptionField(), it's not
taking those values.

Here is the code for a toy-example that reproduces my problem:

When the command-line input to the following program is:
example.exe -l 3 10 20 30
I got the output as expected, and is:
Input Image Name:input.mhd
Number of labels: 3
Label Value: 10
Label Value: 20
Label Value: 30


When I call the same executable with no arguments, the output is:
Input Image Name:input.mhd
Number of labels: 0

However, the output that I was expecting is:
Input Image Name:input.mhd
Number of labels: 4
Label Value: 10
Label Value: 20
Label Value: 30
Label Value: 40

Is this a bug? or, am I doing some mistake here in setting default values
for a list?

Thank you in advance for your help.

Warm Regards,
Subrahmanyam Gorthi.


//-----------------------------------------------------------------------------

#include<iostream>
#include<string>
#include<list>
#include "metaCommand.h"

int main( int argc, char* argv[] )
{
  MetaCommand command;

  // Input file name...
  // By default, set input file name to: input.mhd
  command.SetOption("inputFile", "i", false, "Input file");
  command.AddOptionField("inputFile", "fileName1",
                         MetaCommand::STRING, true, "input.mhd");

  // Label Values...
  // By default, take 4 labels, and set their values to: 10, 20, 30, 40
  command.SetOption("labelValues", "l", false, "List of label values");
  command.AddOptionField("labelValues", "labelList1",
                         MetaCommand::LIST, true, "4 10 20 30 40");

  // Now, Parse the command line
  if (!command.Parse(argc,argv))
    {
    std::cerr << "Error in parsing the input arguments!" << std::endl;
    exit( EXIT_FAILURE );
    }

  // Printing the argument values...
  std::string inputImageFile=command.GetValueAsString("inputFile",
"fileName1");
  std::cout << "Input Image Name:" << inputImageFile << std::endl;

  std::list<std::string> listOfLables;
  listOfLables.clear();

  listOfLables = command.GetValueAsList("labelValues");
  int numLabels = listOfLables.size();

  std::cout << "Number of labels: " << numLabels << std::endl;

  typedef std::list<std::string>::const_iterator LabelValuesIterator;
  LabelValuesIterator labelValuesItr;

  for(labelValuesItr = listOfLables.begin();
     labelValuesItr != listOfLables.end(); ++labelValuesItr)
    {
    std::cout << "Label Value: " << *labelValuesItr << std::endl;
    }

  return EXIT_SUCCESS;
}
//-----------------------------------------------------------------------------
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