Module dev.hloth.zgztransport

Package dev.hloth.zgztransport

Class TransactionBuilder

java.lang.Object

dev.hloth.zgztransport.TransactionBuilder

public final class TransactionBuilder
extends Object

Collects the fields of a Transaction one at a time, which reads better than a constructor of ten arguments and cannot mix up the counters that sit next to each other.

The amount, the counters and the network flag start at zero, the values a top up carries. The product, the stop, the route, the kind and the timestamp have no default and have to be set. Nothing is checked until build() runs.

 Transaction ride = Transaction.builder().cardType(CardType.AVANZA_TOP_UP).amount(550).consecutivePayments(1)
 		.stop(new Stop.Urban(500)).route(new Route(31)).kind(new TransactionKind.Journey(Direction.TWO))
 		.runCounter(7).createdAt(CardDateTime.of(2026, 8, 26, 9, 41, 27)).sequence(1).build();
 

Method Summary

Modifier and Type	Method	Description
TransactionBuilder	amount(int amount)
Transaction	build()	Builds the transaction.
TransactionBuilder	cardType(CardType cardType)
TransactionBuilder	consecutivePayments(int consecutivePayments)
TransactionBuilder	createdAt(CardDateTime createdAt)
TransactionBuilder	kind(TransactionKind kind)
TransactionBuilder	networkFlag(int networkFlag)
TransactionBuilder	route(Route route)
TransactionBuilder	runCounter(int runCounter)
TransactionBuilder	sequence(int sequence)
TransactionBuilder	stop(Stop stop)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

cardType

public TransactionBuilder cardType(CardType cardType)

networkFlag

public TransactionBuilder networkFlag(int networkFlag)

amount

public TransactionBuilder amount(int amount)

consecutivePayments

public TransactionBuilder consecutivePayments(int consecutivePayments)

stop

public TransactionBuilder stop(Stop stop)

route

public TransactionBuilder route(Route route)

kind

public TransactionBuilder kind(TransactionKind kind)

runCounter

public TransactionBuilder runCounter(int runCounter)

createdAt

public TransactionBuilder createdAt(CardDateTime createdAt)

sequence

public TransactionBuilder sequence(int sequence)

build

public Transaction build()

Builds the transaction.

Returns:

the transaction

Throws:

IllegalArgumentException - if a field is outside the range its byte allows

NullPointerException - if a field that has no default was not set