ZF2 Autoloading strategies proposal

[weierophinney]

-- Greg <[hidden email]> wrote
(on Sunday, 05 September 2010, 04:19 PM -0500):
> I was looking at the Zend_Loader loadClass method and noticed that it
> always throw an exception if it could not load the desired class. Can
> this be optional? Sometimes it might be OK that the class does not
> exist even when trying to load it via the autoloader, eg:

Please look at the implementations in the proposal; none of them utilize
Zend_Loader::loadClass(), and none of them throw exceptions.

Within ZF1's autoloader, we wrap the loadClass() method in a try/catch
block, which allows you to drop to another autoloader if it is unable to
locate the class.

At this point, I'm considering removing Zend_Loader from ZF2 -- with
autoloading as the default, loadClass() really isn't all that necessary,
and most of the other methods present in the class are superceded by
functionality native in PHP 5.3.

> if (class_exists('Custom_Override_Class')) {
>  $obj = new Custom_Override_Class();
> } else {
>  $obj = new Default_Class();
> }
>
> $obj->doSomething();

--
Matthew Weier O'Phinney
Project Lead            | [hidden email]
Zend Framework          | http://framework.zend.com/
PGP key: http://framework.zend.com/zf-matthew-pgp-key.asc

[Dolf Schimmel]

Which requires an exception to be instantiated, whereas when you use
that function merely to check if a class is loadable, an unloadable
file isn't an unexpected situation, so doesn't need an exception.
Therefore I can imagine it makes sense if there's a method like
isLoadable() which simply returns a boolean, which is used by the
method that actually loads the class.

Dolf
-- Freeaqingme

On Mon, Sep 6, 2010 at 12:26 AM, Tommy Smith <[hidden email]> wrote:

> Instead of making it optional, you probably just need to catch the exception
> and handle it in a way that doesn't make your code blow up :-)
>
>
> On Sun, Sep 5, 2010 at 3:19 PM, Greg <[hidden email]> wrote:
>>
>> I was looking at the Zend_Loader loadClass method and noticed that it
>> always throw an exception if it could not load the desired class. Can
>> this be optional? Sometimes it might be OK that the class does not
>> exist even when trying to load it via the autoloader, eg:
>>
>>
>> if (class_exists('Custom_Override_Class')) {
>>  $obj = new Custom_Override_Class();
>> } else {
>>  $obj = new Default_Class();
>> }
>>
>> $obj->doSomething();
>>
>> --
>> Greg
>
>