How to use

getCompositions

method

in

org.batfish.datamodel.questions.DisplayHints

public Map<String, Map<String, JsonNode>> computeDisplayValues(DisplayHints displayHints) {
 _displayValues = new HashMap<>(); // reset anything we may have done in the past
 for (Entry<String, Extraction> entry : displayHints.getExtractions().entrySet()) {
  JsonPathExtractionHint jpeHint = null;
  try {
   jpeHint = JsonPathExtractionHint.fromExtractionHint(entry.getValue());
  } catch (IOException e) {
   throw new BatfishException(
     "Could not extract JsonPathExtractionHint from ExtractionHint", e);
  }
  switch (jpeHint.getUse()) {
   case PREFIX:
    extractValuesFromPrefix(entry.getKey(), entry.getValue(), jpeHint);
    break;
   case FUNCOFSUFFIX:
   case PREFIXOFSUFFIX:
   case SUFFIXOFSUFFIX:
    extractValuesFromSuffix(entry.getKey(), entry.getValue(), jpeHint);
    break;
   default:
    throw new BatfishException("Unknown use type " + jpeHint.getUse());
  }
 }
 if (displayHints.getCompositions() != null) {
  doCompositions(displayHints.getCompositions(), displayHints.getExtractions());
 }
 return _displayValues;
}

private DisplayHints getComposition(String displayVariable) {
 DisplayHints displayHints = new DisplayHints();
 Map<String, Composition> compositions = new HashMap<>();
 Composition composition = _displayHints.getCompositions().get(displayVariable);
 compositions.put(displayVariable, composition);
 displayHints.setCompositions(compositions);
 Map<String, Extraction> extractions = new HashMap<>();
 for (String varName : composition.getDictionary().values()) {
  extractions.put(varName, _displayHints.getExtractions().get(varName));
 }
 displayHints.setExtractions(extractions);
 return displayHints;
}