class.ilADTDefinition.php

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<?php

declare(strict_types=1);
abstract class ilADTDefinition
{
    protected bool $allow_null;

    public function __construct()
    {
        $this->reset();
    }

    public function getType(): string
    {
        return substr(substr(get_class($this), 5), 0, -10);
    }

    public function reset(): void
    {
        $this->setAllowNull(true);
    }


    //
    // null
    //

    public function setAllowNull(bool $a_value): void
    {
        $this->allow_null = $a_value;
    }

    public function isNullAllowed(): bool
    {
        return $this->allow_null;
    }


    //
    // comparison
    //

    abstract public function isComparableTo(ilADT $a_adt): bool;
}