meta programming in groovy

ToMetaOrNotToMeta.groovy

    def isDetailCancellableWithDelegate = {
        delegate.status != "INVOICED" || billingService.isCancellable(delegate.invoice)
    }

    def theMetaProgrammingWay = {
        def listOfObjects = detailService.findAll()
        listOfObjects.each {
            it.metaClass.isCancellable = isDetailCancellableWithDelegate
        }

        listOfObjects
    }

    /*****************************************************/

    def isDetailCancellableNormal(def it) {
        it.status != "INVOICED" || billingService.isCancellable(it.invoice)
    }

    def the_Normal_Way = {
        def listOfObjects = detailService.findAll()
        def listOfMaps = []
        listOfObjects.each {
            def props = it.properties
            props.isCancellable = isDetailCancellableNormal(props)
            listOfMaps.add props
        }

        listOfMaps
    }