Hi!
On Friday, January 6, 2017 at 1:35:54 PM UTC-5, dandy.warho...@gmail.com
wrote:
>
> Hi Evert,
>
> I have been working with Sabre-XML for most of the day, but I'm stuck now.
>
> I have a nested XML file and I would like to map that into a PHP class,
> for which I am using the mapValueObject system. This works pretty well so
> far.
>
> At one point my XML file lists elements called "Category". Each category
> has an attribute "Number", which defines the category. Within each Category
> element, there are various sub-elements.
>
> <Category Number="03">
> .......
> </Category>
>
> <Category Number="04">
> ......
> </Category>
>
> <Category Number="05">
> ......
> </Category>
>
>
> However, the subelements in "Category 3" have absolutely nothing to do
> with those in "Category 4", and they both have nothing in common with the
> sub-elements in "Category 5". Therefore, I would like to create a custom
> class for each Category:
>
> Class Category3 {
> ....
> }
>
> Class Category4 {
> ....
> }
>
> Class Category5 {
> ....
> }
>
>
> However, here's the catch: I am not able to define the "Number" attribute
> for the Category in the mapValueObject call. In very simple terms, I am
> trying to accomplish something like this:
>
> $this->mapValueObject($atom . 'Category'*[Number='03'**]*, Element\
> Category3::class);
>
> Is there any way to do this? I'm sorry if I'm being a pest, but I'd
> appreciate if you could point me towards the right direction. I've been
> stuck at this point for hours.
>
mapValueObject can only map 1 element to 1 class. It's really designed for
the simplest use-cases. As soon as your needs are a bit more advanced, you
need to write your own deserializers.
This particular problem I would solve as follows:
use Sabre\Xml;
$service->elementMap[$atom . 'Category'] = function(Xml\Reader $reader) use
($atom) {
$number = $reader->getAttribute('Number');
switch($number) {
case '03' :
return Xml\Deserializer\valueObject($reader, 'Category3', $atom);
case '04' :
return Xml\Deserializer\valueObject($reader, 'Category4', $atom);
}
};
Remember that a custom deserializer like this really just a function that
gets a Reader as an argument and returns 'something'. In this case we are
calling the valueObject deserializer function (that's also used by
mapValueObject) to create a specific class based on this argument.
Evert
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