grails - Groovy - How to reflect code from another groovy app to find Classes/Properties/Types within -

first, came .net background please excuse lack of groovy lingo. when in .net shop, using typescript c# build web apps. in our controllers, receive/respond dtos (data xfer objects). got quite headache every time create/modify dto had update typescript interface (the d.ts file) corresponded it.

so created little app (a simple exe) loaded dll webapp it, reflected on find dtos (filtering specific namespaces), , parse through them find each class name within, properties, , properties' data types, generate information string, , saved d.ts file.

this app configured run on every build of website. way, when go run/debug/build website, update d.ts files automatically - made working typescript easier.

long story short, how achieve grails website if write simple groovy app generate d.ts want?

-- or --

how ide (ex intellij) run groovy file (that part of app) generation post-build?

i did find still need way run on compile:

groovy property iteration

class foo {     def feck = "fe"     def arse = "ar"     def drink = "dr"     }  class foo2 {      def feck = "fe2"     def arse = "ar2"     def drink = "dr2" }   def f = new foo() def f2 = new foo2()   f2.properties.each { prop, val ->     if(prop in ["metaclass","class"]) return     if(f.hasproperty(prop)) f[prop] = val }  assert f.feck == "fe2" assert f.arse == "ar2" assert f.drink == "dr2" 

i've been able extract domain objects , persistent fields via following gant script:

in scripts/props.groovy:

import static groovy.json.jsonoutput.*  includetargets << grailsscript("_grailsbootstrap")  target(props: "lists persistent properties each domain class") {     depends(loadapp)      def propmap = [:].withdefault { [] }     grailsapp.domainclasses.each {         it?.persistentproperties?.each { prop ->             if (prop.hasproperty('name') && prop.name) {                 propmap[it.clazz.name] << ["${prop.name}": "${prop.gettype()?.name}"]             }         }     }     // necessary file i/o here (just printing example)     println prettyprint(tojson(propmap)) }  setdefaulttarget(props) 

this can run via command line so:

grails props 

which produces output following:

{     "com.mycompany.user": [         { "type": "java.lang.string" },         { "username": "java.lang.string" },         { "password": "java.lang.string" }     ],     "com.mycompany.person": [         { "name": "java.lang.string" },         { "alive": "java.lang.boolean" }     ] } 

a couple of drawbacks approach don't transient properties , i'm not sure how hook _events.groovy eventcompileend event.