xp-framework/reflection

Instantiate without constructor

Closed this issue · 5 comments

thekid commented

Usecase is e.g. custom deserialization like what https://github.com/xp-forge/marshalling does. PHP has ReflectionClass::newInstanceWithoutConstructor() for this.

thekid commented

First idea would be to hook on to constructor because this only applies for the case that a constructor already exists, and pass NULL instead of an array for arguments, e.g.:

if ($constructor= $type->constructor()) {
  $instance= $constructor->newInstance(null);
} else {
  $instance= $type->newInstance();
}
thekid commented

However, from a readability point of view, this would still imply something is done with the constructor, which is not what's happening. Maybe then:

if ($constructor= $type->constructor()) {
  $instance= $constructor->bypass();
} else {
  $instance= $type->newInstance();
}
thekid commented

Another idea would be to follow the idea of a generated constructor returned by the constructor() accessor:

$instance= $type->constructor(true)->newInstance();

Instead of true, we could also use constants like Constructor::SYNTHETIC or Constructor::GENERATED.

thekid commented

Or we pass a construction function:

$instance= $type->constructor(function() { })->newInstance();

This way, we have complete control over object instantiation.

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