By: Elias Volanakis

Elias Volanakis — Mon, 26 Oct 2009 23:58:14 +0000

Thanks everybody for the comments and snippet.

By: Matthew Hall

Matthew Hall — Fri, 23 Oct 2009 18:35:57 +0000

You should also check out ListDiff.accept(ListDiffVisitor) which interprets composite changes (i.e. related adds and removes) as moves or replacements.

ListDiff diff = Diffs.computeListDiff(before, after);
diff.accept(new ListDiffVisitor() {
    public void handleAdd(int index, Object element) {
      System.out.println(String.format("\tadded '%s' at %d", element, index));
    }
    public void handleRemove(int index, Object element) {
      System.out.println(String.format("\tremoved '%s' at %d", element, index));
    }
    public void handleMove(int oldIndex, int newIndex, Object element) {
      System.out.println(String.format("\tmoved '%s' from %d to %d", element, oldIndex, newIndex));
    }
    public void handleReplace(int index, Object oldElement, Object newElement) {
      System.out.println(String.format("\treplaced '%s' with '%s' at %d", oldElement, newElement, index));
    }
  });

By: ekke

ekke — Fri, 23 Oct 2009 06:22:25 +0000

so: thanks EMF

ekke

By: Boris Bokowski

Boris Bokowski — Fri, 23 Oct 2009 01:34:55 +0000

And, thank you EMF, where the code for computing the difference originally came from!

Boris

Comments on: Tip: Computing the difference of two collections

By: Elias Volanakis

By: Matthew Hall

By: ekke

By: Boris Bokowski