Groovy閉包委托

def parameterClosure(closure) {	closure()}parameterClosure() {	PRintln "In Outer Closure"	println "this is " + this	println "owner is " + owner	println "delegate is " + delegate		parameterClosure() {		println "In Inner Closure"		println "this is " + this		println "owner is " + owner		println "delegate is " + delegate	}}返回In Outer Closurethis is ConsoleScript37@1372443owner is ConsoleScript37@1372443delegate is ConsoleScript37@1372443In Inner Closurethis is ConsoleScript37@1372443owner is ConsoleScript37$_run_closure1@3acd6fbedelegate is ConsoleScript37$_run_closure1@3acd6fbe2、類中調(diào)用閉包時，this、owner和delegate三個屬性的值都是上下文。
class ParameterClosure {	def handleClosure(closure) {		closure()	}}new ParameterClosure().handleClosure () {	println "this is " + this	println "owner is " + owner	println "delegate is " + delegate}返回this is ConsoleScript43@1d476b4bowner is ConsoleScript43@1d476b4bdelegate is ConsoleScript43@1d476b4b3、方法的執(zhí)行順序，首先是this，其次是owner，最后是delegate。可以設置delegate來修改路由。
class Handler {	def f1() {		println "f1 in Handler"	}	def f2() {		println "f2 in Handler"	}}class ParameterClosure {	def handleClosure(closure) {		closure.delegate = new Handler()		closure()	}}def f1() {	println "f1 in script"}new ParameterClosure().handleClosure () {	f1()	f2()}返回f1 in scriptf2 in Handler