How to use

isDirectory

method

in

com.yahoo.config.application.api.ApplicationFile

/**
 * List the files in this directory, optionally list files for subdirectories recursively as well.
 *
 * @param recurse Set to true if all files in the directory tree should be returned.
 * @return a list of files in this directory.
 */
public List<ApplicationFile> listFiles(boolean recurse) {
  List<ApplicationFile> ret = new ArrayList<>();
  List<ApplicationFile> files = listFiles();
  ret.addAll(files);
  if (recurse) {
    for (ApplicationFile file : files) {
      if (file.isDirectory()) {
        ret.addAll(file.listFiles(recurse));
      }
    }
  }
  return ret;
}

Map<String, ExpressionFunction> readExpressions() {
  Map<String, ExpressionFunction> expressions = new HashMap<>();
  ApplicationFile expressionPath = application.getFile(modelFiles.expressionsPath());
  if ( ! expressionPath.exists() || ! expressionPath.isDirectory()) return Collections.emptyMap();
  for (ApplicationFile expressionFile : expressionPath.listFiles()) {
    try (BufferedReader reader = new BufferedReader(expressionFile.createReader())){
      String name = expressionFile.getPath().getName();
      expressions.put(name, readExpression(name, reader));
    }
    catch (IOException e) {
      throw new UncheckedIOException("Failed reading " + expressionFile.getPath(), e);
    }
    catch (ParseException e) {
      throw new IllegalStateException("Invalid stored expression in " + expressionFile, e);
    }
  }
  return expressions;
}