How to use

getNumPart

method

in

com.hortonworks.streamline.common.util.Utils

/**
 * Returns the latest name from a given list of names that matches the given prefix and suffix part.
 * <p>
 *     E.g.
 *     {@code getLatestName(["test-foo2", "test-foo10", "other", "test-foo1"], "test", "-foo") returns "test-foo10"}
 * </p>
 * @param names
 * @param prefix
 * @param suffix
 * @return
 */
public static Optional<String> getLatestName(Collection<String> names, String prefix, String suffix) {
  return names.stream()
      .filter(n -> n.startsWith(prefix))
      .max((n1, n2) -> Utils.getNumPart(n1, suffix) - Utils.getNumPart(n2, suffix));
}
/**

/**
 * Generates the next name for the given name and suffix.
 * <p>
 * E.g. {@code getNextName("test-foo", "-foo") returns "test-foo2",
 *      getNextName("test-foo2", "-foo") returns "test-foo3"}
 * </p>
 * @param name the current name
 * @param suffix the suffix without the number part
 * @return the next name
 */
public static String getNextName(String name, String suffix) {
  Utils.requireNonEmpty(name, "Empty name");
  String prefix;
  String suffixWithNum;
  int num = getNumPart(name, suffix);
  if (num == -1) {
    prefix = name;
    suffixWithNum = suffix;
  } else {
    prefix = getPrefix(name, suffix);
    suffixWithNum = suffix + (num + 1);
  }
  return prefix + suffixWithNum;
}