Reflection in Groovy

I wanted to dynamically load a class at runtime and run a function specified in the argument in groovy.

Example 

./run.sh Utilities.uptime

To get that to work,

1. Read in the argument from the command prompt

String classFunctionName = args[0]
logger.trace("classFunctionName - " + classFunctionName)

2. Split the name of class and function

//Split the name of class and function
String[] split=classFunctionName.split("\.")
String className = split[0]
logger.trace("className - " + className)

//Name of function
String action = split[1]
logger.trace("action - " + action)

3. Dynamically looked up the function

//Dynamically load class
Utilities.environment = Class.forName(environmentName)
logger.trace(Utilities.environment.toString())

def classAction = Class.forName(className)
logger.trace(classAction.toString())

4. Finally invoked it

logger.trace("About to run " + classAction + "." + action + "()")

classAction."${action}"()

logger.trace("Completed " + classAction + "." + action + "()")

5. If an argument had to provided Example

    ./run.sh test "ABC D"

   the code was modified very slightly

//If arguments are passed - Example  ./run.sh test "ABC D"
if (args.size() > 1) {
	String arguments = args[1]

	logger.trace("About to run " + classAction + "." + action + "(" + arguments + ")")

	//Dynamically call function
	classAction."${action}"(arguments)

	logger.trace("Completed " + classAction + "." + action + "(" + arguments + ")")
}