[FEATURE] Augment @FieldNameConstants with asArray property

[ribomation]

Providing an array of the field names of a domain class is very common in Spring projects, such as Spring Batch when configuring reading or writing of flat-files (CSV, FWV). Using the Lombok @FieldNameConstants(asEnum=true) annotation makes it easier. However, the last step is still somewhat clumsy:
@FieldNameConstants(asEnum=true) class MyDomainClass {...}
var names = Stream.of(MyDomainClass.Fields.values()).map(Enum::name).toArray(String[]::new);

So, my suggestion is to add the annotation property asArray, which would generate a static final String[] with the names.

With Lombok

@FieldNameConstants(asArray=true)
@OtherLombokAnnotations
class Account {
    private String accno;
    private long balance;
}

With Java

class Account {
    private String accno;
    private long balance;
    public static final String[] Fields = {"accno", "balance"};
    //. . .
}

As an example, with the suggested property it would be a breeze to configure an CSV ItemWriter in Spring Batch:

@Bean
public FlatFileItemWriter<Account> itemWriter(Resource file) throws Exception {
	return new FlatFileItemWriterBuilder<Account>()
				.name("Account")
				.resource(file)
				.delimited()
				.names(Account.Fields)    // <----here
				.build();
}

[ribomation]

Another example of usage from Spring, is generation of SQL for a NamedParameterJdbcTemplate object:

var sql = String.format("insert into %s (%s) values (%s)", 
    Account.class.getSimpleName() + "s",
    Stream.of(Account.Fields).collect(Collectors.joining(",")),
    Stream.of(Account.Fields).map(f -> ":"+f).collect(Collectors.joining(","))
)

Which would produce this SQL:

insert into accounts (accno,balance) values (:accno,:balance)

And could be used in the following snippet:

var jdbc = new NamedParameterJdbcTemplate(dataSource);
var data = new BeanPropertySqlParameterSource(anAccountObj);
jdbc.update(sql, data);