Henrik Gemal wrote:
In a image gallery I have to class'es:
class GPicFilePicture extends GPicFileType
class GPicFileMovie extends GPicFileType
both of them are based on:
abstract class GPicFileType
In my code I need to create a new GPicFilePicture. To avoid duplicated
code I've create a wrapper class:
class GPicFile
that does something like this:
if (fileextension == "jpg")
return new GPicFilePicture();
else
return new GPicFileMovie();
I assume the above is in your constructor, and running php5.
if so then what your returning is not being returned... php is returning
the GPicFile object you just asked for instead.
try something like:
GPicFile
{
function __construct($f)
{
if (fileextension == "jpg")
$this->decoration = new GPicFilePicture();
else
$this->decoration = new GPicFileMovie();
}
function getFileDate()
{
$this->decoration->getFileDate()
}
}
which I believe is called a decorator pattern (don't quote me.)
so my PHP code looks like:
$file = new GPicFile($filename);
getFileDate() is implemented in both GPicFilePicture and GPicFileMovie.
Now I try to do:
$file->getFileDate();
I get an error saying:
Call to undefined method GPicFile::getFileDate()
Where am I going wrong?
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