Programming Groovy 2

11.3 Dynamically Accessing Objects

We’ve looked at ways to query for methods and properties, and at ways to invoke them dynamically. There are other convenient ways to access properties and call methods in Groovy. We will look at them now using an instance of ​String​ as an example. Suppose we get the names of properties and methods as input at runtime and want to access these dynamically. Here are some ways to do that:

def printInfo(obj) {
  // Assume user entered these values from standard input
  usrRequestedProperty = 'bytes'
  usrRequestedMethod = 'toUpperCase'

  println obj[usrRequestedProperty]
  //or
  println obj."$usrRequestedProperty"

  println obj."$usrRequestedMethod"() ...