> -----Original Message----- > From: Lukasz Lenart [mailto:[email protected]] > Sent: Friday, July 08, 2011 6:16 > To: Struts Developers List > Subject: [struts-dev] Re: I am working on extending the > iterator tag and I am requesting opinions > > Any news on that ?
Object navigation works nicely, we are using it in production on 2 projects right now. I am still writing unit tests. What does not work (because it is ill defined) is navigation on arrays of arrays. Ex: [1,2,3,[4,5],6,[7,[8,9]]] How should that be navigated? My intended solution is to allow the use of a lambda expression in OGNL to "select" nodes to traverse. But I have not been able to write a working lambda expression for the above traversal to iterate as 1,2,3,4,5,6,7,8,9 When I get that done it will be bulletproof. -Jason > > > Regards > -- > Lukasz > + 48 606 323 122 http://www.lenart.org.pl/ > Warszawa JUG conference - Confitura http://confitura.pl/ > > > 2011/6/7 Jason Pyeron <[email protected]>: > > Currently the iterator component searched the stack for the > iteration > > target, then while iterating it pushes the value to the stack. > > > > In my extension I have support for pre and post traversal > of a tree structure. > > The pre and post selectors are OGNL expressions. As such it > is needed > > to have the current node in a value stack during resolution of > > left/pre and right/post children for a give node. > > > > The question is begged should it be pushed on for > evaluation and then > > popped off after or should it be pushed on before the current value > > (in between the current value and the "action")? > > > > My gut is telling me that push and pop will result in the least > > surprise for a developer using it, as there is no > possibility of the > > node masking an action, but this prevents access of the node from > > inside the iterator except through some "status" like option. > > > > -Jason > > > > -- > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > - - > > - Jason Pyeron PD Inc. http://www.pdinc.us - > > - Principal Consultant 10 West 24th Street #100 - > > - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - > > - - > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > This message is copyright PD Inc, subject to license 20080407P00. > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] For > > additional commands, e-mail: [email protected] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] For > additional commands, e-mail: [email protected] > > -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
