Groovy examples

Closure_inClass.groovy

class A {
  def call (c) {
    c.call()
  }
  def foobar (c) {
    call(c)
  }
}

def a = new A()
a {
    println "hello..."
}
a.foobar {
    println "world..."
}

ifstash.groovy

def ifstash(opt, name, includes) {
    println "ifstash ${opt} ${name} ${includes}"
    dir(name) {
        sh 'rm -rf ./*'
    }
    if (opt) {
        stash name: name, includes: includes
    } else {
        dir(name) {
           try {
               unstash name
           } catch (error) {
               println "${error}"
           }
        }
    }
}

return_closure.groovy

println "GroovySystem.version: ${GroovySystem.version}"


def getClosure (context, Closure c) {
	return {
        println "Before closure"
        c(context);
        println "After closure"
	}();
}

getClosure ("Hello World") {context ->
    println "Doing the work; Context: ${context}";
}

withContext.groovy

println "GroovySystem.version: ${GroovySystem.version}"

def withContext = {Object context, Closure c ->
  println "Start; Context: ${context}"
  c();
    try {
        println "Before closure"
        c(context);
        println "After closure"
    } catch (e) {
      println "In catch: ${e}"
    } finally {
        println "In finally"
    }
    println "End; Context: ${context}"
}


withContext ("Hello World") { Object context ->
    println "Doing the work; Context: ${context}";
}