ezsystems / ezpublish-kernel

        $toHandlers,

        OutputInterface $output

    ) {

        if ($fromHandlers) {

            if (count($fromHandlers) !== 2) {

                $output->writeln("Enter two comma separated values for the --from option: <from_metadata_handler>,<from_binarydata_handler>");

                return false;

            }

            if (!in_array($fromHandlers[0], array_keys($this->configuredMetadataHandlers))) {

                $output->writeln("From meta data handler '$fromHandlers[0]' is not configured.");

                $this->outputConfiguredHandlers($output);

                return false;

            }

            if (!in_array($fromHandlers[1], array_keys($this->configuredBinarydataHandlers))) {

                $output->writeln("From binary data handler '$fromHandlers[1]' is not configured.");

                $this->outputConfiguredHandlers($output);

                return false;

            }

        }

        if ($toHandlers) {

            if (count($toHandlers) !== 2) {

            }

        }

        if ($toHandlers) {

            if (count($toHandlers) !== 2) {

                $output->writeln("Enter two comma separated values for the --to option: <to_metadata_handler>,<to_binarydata_handler>");

                return false;

            }

            if (!in_array($toHandlers[0], array_keys($this->configuredMetadataHandlers))) {

                $output->writeln("To meta data handler '$toHandlers[0]' is not configured.");

                $this->outputConfiguredHandlers($output);

                return false;

            }

            if (!in_array($toHandlers[1], array_keys($this->configuredBinarydataHandlers))) {

                $output->writeln("To binary data handler '$toHandlers[1]' is not configured.");

                $this->outputConfiguredHandlers($output);

                return false;

            }

        }

        if ($fromHandlers && $toHandlers && $fromHandlers === $toHandlers) {

            $output->writeln("From and to handlers are the same. Nothing to do.");