EntryLockingStringMap.php

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<?php

namespace ILIAS\FileUpload\Collection;

use ILIAS\FileUpload\Collection\Exception\ElementAlreadyExistsException;
use ILIAS\FileUpload\Collection\Exception\NoSuchElementException;
use ILIAS\FileUpload\ScalarTypeCheckAware;

final class EntryLockingStringMap implements StringMap
{
    use ScalarTypeCheckAware;
    private $map;


    public function __construct()
    {
        $this->map = new \ArrayObject();
    }


    public function get($key)
    {
        $this->stringTypeCheck($key, 'key');

        if ($this->map->offsetExists($key)) {
            return $this->map->offsetGet($key);
        }

        throw new NoSuchElementException("No meta data associated with key \"$key\".");
    }


    public function toArray()
    {
        return $this->map->getArrayCopy();
    }


    public function has($key)
    {
        $this->stringTypeCheck($key, 'key');

        return $this->map->offsetExists($key);
    }


    public function put($key, $value)
    {
        $this->stringTypeCheck($key, 'key');
        $this->stringTypeCheck($value, 'value');

        if ($this->map->offsetExists($key)) {
            throw new ElementAlreadyExistsException("Element $key can not be overwritten.");
        }

        $this->map->offsetSet($key, $value);
    }
}