How to canonicalize WSDL files in Java?

Question

I need to find differences in two WSDL files. I started by pretty-printing them like here , but I see there are same things (eg complexType s) in the two files defined (for whatever stupid reason) in a different order. I want to canonicalize the files further, so I can later use things like standard diff to find the differences.

No idea if there's a defined canonical form for WSDL, I know there's Canonical XML , but I need to go a bit further and sort all the things whose order doesn't matter.

Answer 1

You can download a Java program from http://www.jclark.com/xml/ which converts XML to Canonical XML. This should be applicable to WSDL files too.

Answer 2

I ran through the tree recursively and sorted all children of nodes matching schema|wsdl:binding|wsdl:portType|wsdl:types|wsdl:definitions . I used this answer for pretty-printing the output. For whatever reason format.setLineWidth(65); doesn't work, so I had to join the lines using replaceAll("\\\\s*\\n\\\\s*(?=[^\\\\s<])", " ") . It seems to work fine.