getOriginal function

Implementation

String getOriginal(String input) {
  // Return the original variable name (before the transformation) given the
  // supplied variable name after the transformation.

  // Find the index of the first underscore.

  int firstUnderscoreIndex = input.indexOf('_');

  // If no underscore is found, return the original string.

  if (firstUnderscoreIndex == -1) {
    return input;
  }

  // Extract the prefix from the input string.

  String prefix = input.substring(0, firstUnderscoreIndex);

  // Remove everything before and including the first underscore.

  String result = input.substring(firstUnderscoreIndex + 1);

  // If the prefix is in the list of special prefixes, handle the suffix.

  if (specialPrefixes.contains(prefix)) {
    int lastUnderscoreIndex = result.lastIndexOf('_');
    if (lastUnderscoreIndex != -1) {
      // Remove the last underscore and everything after it.

      result = result.substring(0, lastUnderscoreIndex);
    }
  }

  return result;
}