groovy design pattern for forms - groovy

Question

I really like the groovy language but I believe my java experience is leading me to a path where I don't use groovys fully potential.
I have a scenario where a groovy object (Master.groovy) sends some json-data to some view that creates a form out of this data. Then the user can submit this form and Master.groovy receives it as json-data again.
Master.groovy can access a pool of different form descriptions (formDesc1, formDesc2, etc.) which it choses from when sending the json to the view. When the user returns the json data - Master.groovy will then pass it over to e.g. formDesc1 to validate it.
This is how it looks with code:
Master.groovy
class Master {
FormDesc[] formDescs = [new FormDesc1(), new FormDesc2(), new FormDesc2()]
def getJSONform(Integer formId){
return formDescs[formId].getForm()
}
def validateForm(Integer formId, def data) {
return formDescs[formId].validate(data)
}
}
FormDesc1.groovy
class FormDesc1 extends FormDesc {
static String name = "alias"
FormDesc1 (){
form.add(new InputElement(name:name, type:"text"))
form.add(new TextArea(name:"msg", rows:"12", cols:"12"))
}
#Override
def validate(data){
errors = []
if(data.get(name)["value"] != "form1")
errors.add("name not allowed")
return errors
}
}
FormDesc2.groovy
class FormDesc2 extends FormDesc {
static String name = "alias"
FormDesc1 (){
form.add(new InputElement(name:name, type:"text"))
form.add(new TextArea(name:"msg", rows:"12", cols:"12"))
}
#Override
def validate(data){
errors = []
if(data.get(name)["value"] != "form1")
errors.add("name not allowed")
return errors
}
}
There can be many forms in the package /forms and to load all of them in the memory seems very unnecessary. And it would be much nicer if the formDesc consisted of json-data that represented the form and then only has the method validate. E.g:
FormDescUltimate.groovy
class FormDescUltimate extends FormDesc {
form = loadJSONFile("formDescUltimate.json")
#Override
def validate(data){
errors = []
if(data.get("alias")["value"] != "form1")
errors.add("name not allowed")
return errors
}
}
formDescUltimate.json
{
'formId' : 'ultimate_form',
'elements': [
{'InputElement' : {'name': 'alias', 'type':'text'}},
{'TextArea' : {'name': 'msg', 'rows':'12', 'cols':'12'}}
]
}
Is it possible to achieve this nicely with groovy, or is there any better design to accomplish this?
Thanks in advance and sorry for the long post!