[java] provide a public method to convert a cucumber expression into parsed segments

[laeubi]

For regularExpressions it is already possible to parse them into groups with a public method, a similar approach should be possible for the CucumberExpressionsParser as well (maybe the Groups Aproach could be reused here...)

[aslakhellesoy]

Have you tried converting the Cucumber Expression to a Pattern then call the static Group.parse method?

[mpkorstanje]

I believe he is interested in the AST for the purpose of syntax highlighting in Eclipse.

[aslakhellesoy]

Aha I see. We'd have to add a getter to get the AST to achieve that. The AST API is currently internal, and I think we should keep it internal until we have implemented the proposed changes in #41 because that will change the AST quite a bit.