Reference dynamic to groovy closure - grails

Question

I have to do a refactoring in an advanced search method with 500 lines. I split this method using closures in small parts, and now I have a lot of closures but I want to invoke them dynamically.
For example:
def listCriteria={ ... }
def textCriteria={ ... }
def booleanCriteria={ ... }
criteria.listDistinct {
criteries.eachWithIndex { crit, i->
def criteriaType="${crit.type}Criteria"
...
}
}
How can I do that?

Answer 1

Using methods you could dynamically call this methods from a string like this:
def listCriteria() {"list"}
def textCriteria() {"text"}
def string1 = "list"
def string2 = "text"
assert "${string1}Criteria"() == "list"
assert "${string2}Criteria"() == "text"
Edit:
I don't know an elegant way to get a dynamic reference to a closure.
You could use the properties property of your controller class to find all closures and invoke them.
def allClosures = this.properties.findAll{Closure.isAssignableFrom(it.value.getClass())}
def callCriteriaClosureByName(name) {
def criteriaClosure = allClosures.find{it.key == "${name}Criteria"}.value
if(criteriaClosure)
criteriaClosure()
}
Not that nice - but should work.

Answer 2

Closures are good for scoping. What about using a map?
class Criteria {
def listDistinct(closure) {
closure()
}
}
closures = [
listCriteria : { "list" },
textCriteria : { "text" },
booleanCriteria : { "boolean" }
]
def criteries = ["list", "text", "boolean"]
def criteria = new Criteria()
criteria.listDistinct {
criteries.eachWithIndex { crit, index ->
def criteriaType=closures["${crit}Criteria"]
assert criteriaType instanceof Closure
}
}