grails - URL Mapping - Replacing characters in a parameter pulled from a database -

i trying figure out, how modify parameter being integrated url mapping using.

static mappings =  {  "/$controller/$action?/$id?/(.$format)?" {         constraints {             // apply constraints here         }  }   name test1: "/.../$title/..."{         controller = "study"         action = "st_show"     }  name test2: "/.../$title/..."{         controller = "search"         action = "se_show"     } 

the parameter $title pretty dataset, pulled database , transmitted in following format [ title ]. there square brackets in front , behind string , words seperated through blanks.

if creating link through g:link params nested in, gets put url pulled database. attempting create seo-urls, present title of publication devided hyphens instead of url-encoded "%20".

until now, able generate dynamic urls looking this:

http://localhost:8080/projectname/show/%5ballgemeine%20bevölkerungs[...]/782/...params... 

furthermore implemented through jquery, though should static , users should able copy link open page - wouldn't possible when changing url client-side while loading page.

is there way define function replaceall.(' ', '-'), can invoked onto parameter in mapping replace blanks hyphens , f.e. square brackets empty character? that's pretty much, wasn't able come through documentation.

thank in advance help!

i managed solve problem creating service function containing regex , executing function onto parameter title in g:link, firstly converted string, gets passed function.

<g:link controller="study" action="st_show" params="[data: data, ... title: conversionservice.convert(fieldvalue(bean: path).tostring(), ... data: data)]"></g:link> 

and function in conversionservice

public static string convert(string title){         title = title.replaceall("\\s", "-").replaceall("[^0-9a-za-z\\-]", "");         return title; }