Rearrange one input according to other input field value in mapping groovy script in SAP CPI

Rearrange one input value according to other input field value inside message mapping. 


Groovy Script:

import com.sap.it.api.mapping.*;

def void customFunc(String[] Prod1, String[] Prod, String[] Cat, Output result,MappingContext context){

for(int i=0; i<Prod1.length; i++){

for(int j=0; j<Prod.length; j++){

if(Prod[j]==Prod1[i])

{
result.addValue(Cat[j])
}
}
result.addContextChange()
}
}