TermList­Builder.php

<?php

/**
* @file
* Contains \Drupal\example_module\Controller\TermListBuilder.
*/

namespace Drupal\example_module\Controller;

use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\EntityListBuilder;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Routing\UrlGeneratorInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
* Provides a list controller for dictionary_term entity.
*
* @ingroup dictionary
*/
class TermListBuilder extends EntityListBuilder {

    /**
    * The url generator.
    *
    * @var \Drupal\Core\Routing\UrlGeneratorInterface
    */
    protected $urlGenerator;

    /**
    * {@inheritdoc}
    */
    public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
        return new static(
        $entity_type,
        $container->get('entity.manager')->getStorage($entity_type->id()),
        $container->get('url_generator')
        );
    }

    /**
    * Constructs a new DictionaryTermListBuilder object.
    *
    * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
    * The entity type term.
    * @param \Drupal\Core\Entity\EntityStorageInterface $storage
    * The entity storage class.
    * @param \Drupal\Core\Routing\UrlGeneratorInterface $url_generator
    * The url generator.
    */
    public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage, UrlGeneratorInterface $url_generator) {
        parent::__construct($entity_type, $storage);
        $this->urlGenerator = $url_generator;
    }

    /**
    * {@inheritdoc}
    *
    * We override ::render() so that we can add our own content above the table.
    * parent::render() is where EntityListBuilder creates the table using our
    * buildHeader() and buildRow() implementations.
    */
    public function render() {
        $build['description'] = array(
                '#markup' => $this->t('Content Entity Example implements a DictionaryTerms model. These are fieldable entities. You can manage the fields on the <a href="@adminlink">Term admin page</a>.', array(
                '@adminlink' => $this->urlGenerator->generateFromRoute('entity.dictionary.term_settings'),
            )),
        );
        $build['table'] = parent::render();
        return $build;
    }

    /**
    * {@inheritdoc}
    *
    * Building the header and content lines for the dictionary_term list.
    *
    * Calling the parent::buildHeader() adds a column for the possible actions
    * and inserts the 'edit' and 'delete' links as defined for the entity type.
    */
        public function buildHeader() {
        $header['id'] = $this->t('TermID');
        $header['pl'] = $this->t('Polish');
        $header['en'] = $this->t('English');
        return $header + parent::buildHeader();;
       
    }

    /**
    * {@inheritdoc}
    */
    public function buildRow(EntityInterface $entity) {
        /* @var $entity \Drupal\example_module\Entity\Term */
        $row['id'] = $entity->id();
        $row['pl'] = $entity->pl->value;
        $row['en'] = $entity->en->value;
        return  $row+ parent::buildRow($entity);
        
        
    }

}