class ProcessPluginBase

abstract class ProcessPluginBase extends PluginBase implements MigrateProcessInterface {
    
    /**
     * Determines if processing of the pipeline is stopped.
     *
     * @var bool
     */
    protected bool $stopPipeline = FALSE;
    
    /**
     * {@inheritdoc}
     */
    public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
        // Do not call this method from children.
        if (isset($this->configuration['method'])) {
            if (method_exists($this, $this->configuration['method'])) {
                return $this->{$this->configuration['method']}($value, $migrate_executable, $row, $destination_property);
            }
            throw new \BadMethodCallException(sprintf('The %s method does not exist in the %s plugin.', $this->configuration['method'], $this->pluginId));
        }
        else {
            throw new \BadMethodCallException(sprintf('The "method" key in the plugin configuration must to be set for the %s plugin.', $this->pluginId));
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function multiple() {
        return FALSE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isPipelineStopped() : bool {
        return $this->stopPipeline;
    }
    
    /**
     * {@inheritdoc}
     */
    public function reset() : void {
        $this->stopPipeline = FALSE;
    }
    
    /**
     * Stops pipeline processing after this plugin finishes.
     */
    protected function stopPipeline() : void {
        $this->stopPipeline = TRUE;
    }

}