Hello,
> 1. Public.SCHEMANAME.getTables() returns a list of tables generated by jOOQ,
> which is very useful, but the function only returns Table<?> and not
> Table<TableRecord<?>> or even Table<Record<?>> - Why is that?
Good question. Let's have a look at Java generics. A schema contains
tables, so, meaningful return values for getTables() are:
1. List<Table>
2. List<? extends Table>
2. suggests that UpdatableTable and other types are possible, too. But
the List is always heterogeneous, so the added wildcard doesn't add
much value.
Then, Table itself is generic with type <R extends Record>. We know
that all tables in a schema are "physical" tables, hence their <R>
binds to a subtype of TableRecord, which you also mentioned. Some even
bind to UpdatableRecord, or to a generated record. With jOOQ 3.0,
Record1, Record2, Record3, ... come into play as well.
So, meaningful return values for getTables() are:
a) List<Table<?>>
b) List<Table<? extends Record>>
c) List<Table<Record>>
d) List<Table<? extends TableRecord<?>>
e) List<Table<TableRecord<?>>>
c) and e) are wrong, as generated tables (depending on your generator
configuration) look like this:
public class Book extends TableImpl<BookRecord> {}
TableImpl<BookRecord> is not compatible with either Table<Record> or
Table<TableRecord<?>>
a), b) and d) are correct, as the types are compatible, but a) and b)
are the same (because ? can only bind to a subtype of Record anyway),
which leaves us with a) and d).
I chose a) simply because I found it more "friendly" for API users...
> 2. How do I setup a default set of ExecuteListeners across creation of
> Executors?
You will have to wrap Executor creation in your own factory
Cheers
Lukas
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