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package infer_test;

public class Test {
  public static final String[] PREFIXES = {"A", "B"};

  private String currentValue;
  private String newerValue;

  private static class Strings {
    public static boolean isNullOrBlank(String string) {
        return string == null || string.trim().length() == 0;
    }

    public static boolean hasAnyPrefix(String newerValue, String... prefixes) {
      if (newerValue == null) {
          return false;
      }
      for (String prefix : prefixes) {
          if (newerValue.startsWith(prefix)) {
              return true;
          }
      }
      return false;
    }
  }

  public String getValue() {
      if (Strings.isNullOrBlank(currentValue) && !Strings.isNullOrBlank(newerValue)) {
          if (Strings.hasAnyPrefix(newerValue, PREFIXES)) {
              return "a";
          }
      }
      return newerValue;
  }
}