Multi criteria sorting of a list of objects with Guava Ordering

Question

I have a class WHICH CANNOT implement comparable, but needs to be sorted based on 2 fields. How can I achieve this with Guava?

Let\'s say the class is:

c         


        

Answer 1

A less functional, but arguably cleaner, solution:

new Ordering() {
  public int compare(X x1, X x2) {
    return ComparisonChain.start()
      .compare(x1.stringValue, x2.stringValue)
      .compare(x2.dateValue, x1.dateValue) // flipped for reverse order
      .result();
  }
}.immutableSortedCopy(listOfXs);