Basically, what I do is create two command objects and pass them around through next and previous. One for each step. But in this case the domain objects are simple you can just pass them around in the flow object. e.g
def createCustomerFlow = {
basicInfo{
on('next'){Customer cust ->
flow.customer = cust
if(!cust.validate()){
flow.errorbean = cust
return error()
}else{
return success()
}
}.to 'bankInfo'
on("cancel").to 'cancel'
}
bankInfo{
on('finish'){BankDetails bank ->
flow.bank = bank
if(!bank.validate()){
flow.errorbean = bank
return error()
}else{
try{
//create customer. Implement this method yourself
def cust = createCustomer(flow.customer, flow.bank)
flow.customer = cust
}catch(ValidationException e){
log.error("Validation exception", e)
flow.errorbean = e
return error()
}
return success()
}
}.to 'summary'
on("previous"){BankDetails bank ->
flow.bank = bank
}.to 'basicInfo'
on("cancel").to 'cancel'
}
}