Skip serialisation of attributes with default values (#1517)

* Avoid initialising attribute with default

* Re-generate Checkout models

* Add tests

* Refactor test to use JSON comparison

* Address Code Analysis remarks

* Address Code Analysis remarks

Author: gcatanese

src/main/java/com/adyen/model/checkout/AchDetails.java

@@ -206,7 +206,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.ACH;
+  private TypeEnum type;
 
   public AchDetails() {}
 

src/main/java/com/adyen/model/checkout/AffirmDetails.java

@@ -70,7 +70,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.AFFIRM;
+  private TypeEnum type;
 
   public AffirmDetails() {}
 

src/main/java/com/adyen/model/checkout/AfterpayDetails.java

@@ -97,7 +97,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.AFTERPAY_DEFAULT;
+  private TypeEnum type;
 
   public AfterpayDetails() {}
 

src/main/java/com/adyen/model/checkout/AmazonPayDetails.java

@@ -78,7 +78,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.AMAZONPAY;
+  private TypeEnum type;
 
   public AmazonPayDetails() {}
 

src/main/java/com/adyen/model/checkout/AndroidPayDetails.java

@@ -70,7 +70,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.ANDROIDPAY;
+  private TypeEnum type;
 
   public AndroidPayDetails() {}
 

src/main/java/com/adyen/model/checkout/ApplePayDetails.java

@@ -131,7 +131,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.APPLEPAY;
+  private TypeEnum type;
 
   public ApplePayDetails() {}
 

src/main/java/com/adyen/model/checkout/ApplePayDonations.java

@@ -131,7 +131,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.APPLEPAY;
+  private TypeEnum type;
 
   public ApplePayDonations() {}
 

src/main/java/com/adyen/model/checkout/AuthenticationData.java

@@ -80,7 +80,7 @@ public static AttemptAuthenticationEnum fromValue(String value) {
   private AttemptAuthenticationEnum attemptAuthentication;
 
   public static final String JSON_PROPERTY_AUTHENTICATION_ONLY = "authenticationOnly";
-  private Boolean authenticationOnly = false;
+  private Boolean authenticationOnly;
 
   public static final String JSON_PROPERTY_THREE_D_S_REQUEST_DATA = "threeDSRequestData";
   private ThreeDSRequestData threeDSRequestData;

src/main/java/com/adyen/model/checkout/BacsDirectDebitDetails.java

@@ -95,7 +95,7 @@ public static TypeEnum fromValue(String value) {
   }
 
   public static final String JSON_PROPERTY_TYPE = "type";
-  private TypeEnum type = TypeEnum.DIRECTDEBIT_GB;
+  private TypeEnum type;
 
   public BacsDirectDebitDetails() {}
 

src/main/java/com/adyen/model/checkout/BalanceCheckRequest.java

@@ -315,7 +315,7 @@ public static ShopperInteractionEnum fromValue(String value) {
       "threeDSAuthenticationOnly";
   @Deprecated // deprecated since Adyen Checkout API v69: Use
   // `authenticationData.authenticationOnly` instead.
-  private Boolean threeDSAuthenticationOnly = false;
+  private Boolean threeDSAuthenticationOnly;
 
   public static final String JSON_PROPERTY_TOTALS_GROUP = "totalsGroup";
   private String totalsGroup;