title: Java unique file id fileKey : Path -> fileKey OK | fileKey -> Path possible?
body: <p>Ok, </p>
  
  <p>So i can get a beautiful unique file key for a given file:</p>
  
  <p><a href="http://openjdk.java.net/projects/nio/javadoc/java/nio/file/attribute/BasicFileAttributes.html" rel="nofollow">http://openjdk.java.net/projects/nio/javadoc/java/nio/file/attribute/BasicFileAttributes.html</a></p>
  
  <p>But can one get the whereabouts (Path) of a file, given a fileKey?</p>