Is there an algorithm that computes the strength of a digest alg?

[Weijun Wang]

Hi Andrew

I need a method
  boolean isWeakerThan(String a1, String a2)

so that isWeakerThan("MD5", "SHA1") returns true and 
isWeakerThan("SHA-256", "SHA1") returns false. I know you have done a 
lot of constraints works in JDK 7. Do you have an existing one? 
Otherwise, I plan to manually assign a value to each known algorithm and 
compare it.

Thanks
Max