DSLのサンプル

gistfile1.groovy

class Main {
        static  main(args){
                run( new File("src/main/resources/dsl.groovy"))
        }
        static run(File file){
                Script script = new GroovyShell().parse(file.text)
                Message mes = new Message()
                script.metaClass = createEMC(script.class,{
                        ExpandoMetaClass emc ->
                        emc.hello = {
                                Closure cl ->
                                cl.delegate = new HelloDelegate(mes)
                                cl.resolveStrategy = Closure.DELEGATE_FIRST
                                cl()
                        }
                })
                script.run()
                printMessage(mes)
        }
        static ExpandoMetaClass createEMC(Class clazz, Closure cl){
                        ExpandoMetaClass emc = new ExpandoMetaClass(clazz,false)
                        cl(emc)
                        emc.initialize()
                        emc
        }
        static printMessage(Message message){
                println "${message.hello}${message.mes}"
        }
}