MetaProgramming Category Class in Groovy Scripting groovy training telugu 46

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//catDemo.groovy

package therealdanvega

//String.metaClass.shout={-> toUpperCase()}

//println "Hello World!".shout()

use(StringCategory){

println "Hello,World!".shout()

}

println "Hello,World!".shout()

//StringCategory.groovvy

package therealdanvega

class StringCategory{

static String shout(String str){

str.toUpperCase()

}

}

//time.groovy

package therealdanvega

import groovy.time.TimeCategory

use(TimeCategory){

println 1.minute.from.now

println 10.hour.ago

def someDate=new Date()

println someDate -3.months

}