Update validation logic to trigger certain rules on completion only

src/main/java/org/eclipsefoundation/react/dto/MembershipForm.java

@@ -31,6 +31,7 @@ import org.eclipsefoundation.persistence.model.DtoTable;
 import org.eclipsefoundation.persistence.model.ParameterizedSQLStatement;
 import org.eclipsefoundation.persistence.model.ParameterizedSQLStatementBuilder;
 import org.eclipsefoundation.persistence.model.SortableField;
+import org.eclipsefoundation.react.dto.ValidationGroups.Completion;
 import org.eclipsefoundation.react.namespace.FormState;
 import org.eclipsefoundation.react.namespace.MembershipFormAPIParameterNames;
 import org.hibernate.annotations.GenericGenerator;
@@ -47,7 +48,7 @@ public class MembershipForm extends BareNode implements TargetedClone<Membership
     private String userID;
     private String membershipLevel;
     private boolean signingAuthority;
-    @NotBlank(message = "Purchase order state cannot be blank")
+    @NotBlank(message = "Purchase order state cannot be blank", groups = Completion.class)
     private String purchaseOrderRequired;
     private String vatNumber;
     private String registrationCountry;

src/main/java/org/eclipsefoundation/react/dto/ValidationGroups.java

+package org.eclipsefoundation.react.dto;
+
+import javax.validation.groups.Default;
+
+/**
+ * Used to differentiate some validation annotations from default to allow partial states.
+ * 
+ * @author Martin Lowe
+ *
+ */
+public interface ValidationGroups {
+    interface Completion extends Default {
+    }
+}

src/main/java/org/eclipsefoundation/react/resources/MembershipFormResource.java

@@ -42,6 +42,7 @@ import org.eclipsefoundation.react.dto.Contact;
 import org.eclipsefoundation.react.dto.FormOrganization;
 import org.eclipsefoundation.react.dto.FormWorkingGroup;
 import org.eclipsefoundation.react.dto.MembershipForm;
+import org.eclipsefoundation.react.dto.ValidationGroups.Completion;
 import org.eclipsefoundation.react.model.ConstraintViolationWrapFactory;
 import org.eclipsefoundation.react.model.ConstraintViolationWrapFactory.ConstraintViolationWrap;
 import org.eclipsefoundation.react.namespace.FormState;
@@ -215,7 +216,7 @@ public class MembershipFormResource extends AbstractRESTResource {
 
     private <T extends BareNode> Set<ConstraintViolationWrap> recordViolations(List<T> items) {
         ConstraintViolationWrapFactory factory = new ConstraintViolationWrapFactory();
-        return items.stream().flatMap(item -> factory.build(validator.validate(item)).stream())
+        return items.stream().flatMap(item -> factory.build(validator.validate(item, Completion.class)).stream())
                 .collect(Collectors.toSet());
     }
 }