Question

is it possible to load a closure’s code from a string (that may come from a file) in Groovy ?

Answer 1

Did you mean something like this?

groovy:000> sh = new GroovyShell()
===> groovy.lang.GroovyShell@1d6dba0a
groovy:000> closure = sh.evaluate("{it -> println it}")
===> Script1$_run_closure1@59c958af
groovy:000> closure(1)
1
===> null
groovy:000> [1,2,3,4].each { closure(it) }
1
2
3
4
===> [1, 2, 3, 4]
groovy:000>