How to inject class with passing into it some argument

Question

When we are injecting some class into another using constructor we are making this:

protected $someClass

public function __construct(SomeClass $someClass)
{
    $this->someClass = $someClass;
}

But what if we need to pass some argument into this SomeClass?

Magento has following implementation:

Magento\Catalog\Model\Layer\FilterList

$this->filters = [
    $this->objectManager->create($this->filterTypes[self::CATEGORY_FILTER], ['layer' => $layer]),
];

I wan't to inject my own filter into plugin and pass into it ['layer' => $layer]

Please advice.

Answer 1

<type name="Vendor\Module\Model\Layer\Filter\Example">
    <arguments>
        <argument name="layer" xsi:type="object">Vendor\Module\Model\Layer\Example</argument>
    </arguments>
</type>

This class Vendor\Module\Model\Layer\Filter\Example should extends Magento\Catalog\Model\Layer\Filter\AbstractFilter
You can see more here https://github.com/magento/magento2/blob/develop/app/code/Magento/Catalog/Model/Layer/FilterList.php#L39
Class Vendor\Module\Model\Layer\Example should extends \Magento\Catalog\Model\Layer
So you can pass argument layer class to class Filter\Example