delegator for injecting TableGateway features into TableGateways created as part of the Apigility DB-Connected functionality.

module.config.php

<?php
return array(
    /* ... */
    'service_manager' => array(
        /* ... */
        'delegators' => array(
            'Some\V1\Rest\Foo\FooResource\Table' => array(
                'Some\TableGatewayFeaturesDelegatorFactory',
            ),
        ),
    ),
    /* ... */
    'zf-apigility' => array(
        'db-connected' => array(
           /* ... */
           'Some\V1\Rest\Foo\FooResource' => array(
               'features' => array(
                   /* assoc array of feature name => options */
               ),
            ),
        ),
    ),
);

TableGatewayFeaturesDelegatorFactory.php

<?php

use Zend\Db\TableGateway\Feature;
use Zend\ServiceManager\DelegatorFactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;

class TableGatewayFeaturesDelegatorFactory implements DelegatorFactoryInterface
{
    public function createDelegatorWithName(
        ServiceLocatorInterface $services,
        $name,
        $requestedName,
        $callback
    ) {
        $table  = $callback();
        $config = $services->get('Config');

        // TableGateway service for DB-Connected ends in "\\Table"; strip that
        $resourceName = substr($requestedName, 0, strlen($requestedName) - 6);
        $config = $config['zf-apigility']['db-connected'][$resourceName]; 

        if (! isset($config['features'])) {
            return $table;
        }

        $featureSet = $table->getFeatureSet();
        foreach ($config['features'] as $featureName => $options) {
            // logic to create feature...
            switch ($featureName) {
                case 'sequence':
                    $feature = new Feature\SequenceFeature(
                        $options['primaryKeyField'],
                        $options['sequenceName']
                    );
                    break;
                default:
                    // Unknown feature; do nothing
                    continue;
            }

            // and then add it to the feature-set
            $featureSet->addFeature($feature);
        }

        return $table;
    }
}