Skip field (set to null) but not skip record when exception occurrs

[Manfred73]

Hi,

I have a file which I parse into a record using beanio. Some of the fields in the file represent date strings in the form of yyyyMMdd (20230720), however some dates can be optional and are marked as 00000000 in the file. When using a format on the field, this will result in an InvalidRecordException (with an underlying DateTimeParseException).

I am looking for a way to check the DateTimeParseException and if the exception text contains 00000000, I want to leave the field null and in all other cases rethrow the original InvalidRecordException.

Let's say I have a MyRecord cIass containing a LocalDate field of which the value is 00000000:

public class MyRecord() {
	private static final String DATE_PATTERN = "yyyyMMdd";

	// some fields

	@Field(at = 52, length = 8, format = DATE_PATTERN, required = false, nillable = true)
	private LocalDate myDate;

	// some more fields
}

I am able to set an exception handler on the beanReader as such:

beanReader.setErrorHandler(new BeanReaderErrorHandlerSupport() {
	@Override
	public void invalidRecord(final InvalidRecordException ire) {
		optionalDateExceptionHandler.checkIfOptionalDatesHaveValidValue(ire);
	}
});

The optionalDateExceptionHandler contains the logic of checking the InvalidRecordException and if it contains a DateTimeParseException with a value of 00000000. This works fine.
However, I cannot figure out how to set the date field to null (and ignore the exception) so the rest of the record can be parsed.
Is this possible at all? What I notice now is that when the exception occurrs, I can do something with the exception, but the entire record is skipped.

[Manfred73]

I think adding a custom type handler class for this makes better sense?

[bjansen]

Yep, a custom type handler that checks for 00000000 before values are parsed would be a better approach.