Part 5: credit card subtype

src/main/java/com/ankurm/jackson3/part5polymorphic/CreditCardPayment.java

@@ -0,0 +1,11 @@
+package com.ankurm.jackson3.part5polymorphic;
+
+public class CreditCardPayment extends PaymentMethod {
+    private String cardNumberLastFour;
+    private String cardNetwork;                 // "VISA", "MASTERCARD", etc.
+
+    public String getCardNumberLastFour() { return cardNumberLastFour; }
+    public String getCardNetwork()        { return cardNetwork; }
+    public void setCardNumberLastFour(String v) { this.cardNumberLastFour = v; }
+    public void setCardNetwork(String v)        { this.cardNetwork = v; }
+}