- Validation.begin().isNotNull("Field Name", fieldName).check().isGreater("Field Name Length", fieldName.length(), 0).isNull("Field Name Unique", getFieldByName(fieldName)).check();
+ checkNotNull(fieldName, "fieldName must not be null");
+ checkArgument(fieldName.length() > 0, "fieldName must not be empty");
+ if (getFieldByName(fieldName) != null) {
+ throw new DuplicateField();
+ }