ilAssLacOperationManufacturer.php

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<?php
 
class ilAssLacOperationManufacturer extends ilAssLacAbstractManufacturer
{
    protected static $instance = null;
 
    public static function _getInstance(): ?ilAssLacOperationManufacturer
    {
        if (self::$instance == null) {
            self::$instance = new ilAssLacOperationManufacturer();
        }
        return self::$instance;
    }
 
    public function manufacture(string $attribute): ilAssLacAbstractComposite
    {
        $operation = "";
        switch ($attribute) {
            case ilAssLacLesserOperation::$pattern:
                $operation = new ilAssLacLesserOperation();
                break;
            case ilAssLacLesserOrEqualsOperation::$pattern:
                $operation = new ilAssLacLesserOrEqualsOperation();
                break;
            case ilAssLacEqualsOperation::$pattern:
                $operation = new ilAssLacEqualsOperation();
                break;
            case ilAssLacGreaterOrEqualsOperation::$pattern:
                $operation = new ilAssLacGreaterOrEqualsOperation();
                break;
            case ilAssLacGreaterOperation::$pattern:
                $operation = new ilAssLacGreaterOperation();
                break;
            case ilAssLacNotEqualsOperation::$pattern:
                $operation = new ilAssLacNotEqualsOperation();
                break;
            case ilAssLacAndOperation::$pattern:
                $operation = new ilAssLacAndOperation();
                break;
            case ilAssLacOrOperation::$pattern:
                $operation = new ilAssLacOrOperation();
                break;
            default:
                throw new ilAssLacUnsupportedOperation($attribute);
                break;
        }
        return $operation;
    }
 
    public function getPattern(): string
    {
        //              return '/[&\|<>=]+/';
        return '/&|\||(?<!<|>)=|<(?!=|>)|>(?!=)|<=|>=|<>/';
    }
 
    private function __clone()
    {
    }
}