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<?php |
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namespace Percy\Repository; |
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use Aura\Sql\ExtendedPdoInterface; |
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use InvalidArgumentException; |
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use Percy\Entity\Collection; |
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use Percy\Entity\CollectionBuilderTrait; |
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use Percy\Entity\EntityInterface; |
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use Percy\Http\QueryStringParserTrait; |
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use Psr\Http\Message\ServerRequestInterface; |
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use RuntimeException; |
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abstract class AbstractSqlRepository implements RepositoryInterface |
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{ |
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use CollectionBuilderTrait; |
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use QueryStringParserTrait; |
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/** |
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* @var \Aura\Sql\ExtendedPdoInterface |
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*/ |
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protected $dbal; |
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/** |
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* |
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* @var mixed |
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*/ |
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protected $relationships = []; |
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/** |
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* Construct. |
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* |
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* @param \Aura\Sql\ExtendedPdoInterface $dbal |
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*/ |
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public function __construct(ExtendedPdoInterface $dbal) |
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{ |
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$this->dbal = $dbal; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function countFromRequest(ServerRequestInterface $request) |
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{ |
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$rules = $this->parseQueryString($request->getUri()->getQuery()); |
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list($query, $params) = $this->buildQueryFromRules($rules, 'SELECT COUNT(*) as total FROM '); |
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return (int) $this->dbal->fetchOne($query, $params)['total']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getFromRequest(ServerRequestInterface $request) |
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{ |
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$rules = $this->parseQueryString($request->getUri()->getQuery()); |
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list($query, $params) = $this->buildQueryFromRules($rules); |
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if (array_key_exists('sort', $rules)) { |
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$query .= sprintf(' ORDER BY %s ', $rules['sort']); |
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$query .= (array_key_exists('sort_direction', $rules)) ? $rules['sort_direction'] : 'ASC'; |
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} |
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if (array_key_exists('limit', $rules)) { |
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$query .= ' LIMIT '; |
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$query .= (array_key_exists('offset', $rules)) ? sprintf('%d,', $rules['offset']) : ''; |
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$query .= $rules['limit']; |
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} |
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return $this->buildCollection($this->dbal->fetchAll($query, $params)) |
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->setTotal($this->countFromRequest($request)); |
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} |
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/** |
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* Build a base query without sorting and limits from filter rules. |
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* |
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* @param array $rules |
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* @param string $start |
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* |
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* @return array |
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*/ |
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protected function buildQueryFromRules(array $rules, $start = 'SELECT * FROM ') |
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{ |
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$query = $start . $this->getTable(); |
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$params = []; |
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if (array_key_exists('filter', $rules)) { |
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foreach ($rules['filter'] as $key => $where) { |
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$keyword = ($key === 0) ? ' WHERE' : ' AND'; |
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$query .= sprintf('%s %s %s :%s', $keyword, $where['field'], $where['delimiter'], $where['field']); |
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$params[$where['field']] = $where['value']; |
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} |
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} |
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return [$query, $params]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function countByField($field, $value) |
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{ |
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$query = sprintf('SELECT COUNT(*) as total FROM %s WHERE %s IN (:%s)', $this->getTable(), $field, $field); |
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$params = [ |
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$field => implode(',', (array) $value) |
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]; |
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return (int) $this->dbal->fetchOne($query, $params)['total']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getByField($field, $value) |
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{ |
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$query = sprintf('SELECT * FROM %s WHERE %s IN (:%s)', $this->getTable(), $field, $field); |
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$params = [ |
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$field => implode(',', (array) $value) |
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]; |
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return $this->buildCollection($this->dbal->fetchAll($query, $params)) |
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->setTotal($this->countByField($field, $value)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function attachRelationships(Collection $collection, array $relationships = []) |
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{ |
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foreach ($collection->getIterator() as $entity) { |
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$rels = $entity->getRelationships(); |
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// @todo sort filtering of requested relationships |
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array_walk($rels, [$this, 'attachEntityRelationships'], $entity); |
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} |
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return $collection; |
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} |
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/** |
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* Attach relationships to a specific entity. |
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* |
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* @param string $entityType |
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* @param string $relationship |
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* @param \Percy\Entity\EntityInterface $entity |
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* |
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* @throws \RuntimeException when relationship has not been properly defined |
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* |
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* @return void |
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*/ |
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protected function attachEntityRelationships($entityType, $relationship, EntityInterface $entity) |
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{ |
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$map = $this->getRelationshipMap($relationship); |
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$query = sprintf( |
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'SELECT * FROM %s LEFT JOIN %s ON %s.%s = %s.%s WHERE %s = :%s', |
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$map['defined_in']['table'], |
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$map['target']['table'], |
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$map['target']['table'], |
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$map['target']['primary'], |
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$map['defined_in']['table'], |
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$map['target']['relationship'], |
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$map['defined_in']['primary'], |
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$map['defined_in']['entity'] |
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); |
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$result = $this->dbal->fetchAll($query, [ |
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$map['defined_in']['entity'] => $entity[$map['defined_in']['entity']] |
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]); |
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$remove = [$map['defined_in']['primary'], $map['target']['relationship']]; |
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foreach ($result as &$resource) { |
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$resource = array_filter($resource, function ($key) use ($remove) { |
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return (! in_array($key, $remove)); |
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}, ARRAY_FILTER_USE_KEY); |
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} |
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$entity[$relationship] = $this->buildCollection($result, $entityType); |
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} |
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/** |
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* Get possible relationships and the properties attached to them. |
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* |
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* @param string $relationship |
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* |
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* @throws \InvalidArgumentException when requested relationship is not defined |
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* @throws \RuntimeException when map structure is defined incorrectly |
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* |
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* @return array |
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*/ |
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protected function getRelationshipMap($relationship) |
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{ |
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if (! array_key_exists($relationship, $this->relationships)) { |
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throw new InvalidArgumentException( |
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sprintf('(%s) is not defined in the relationship map on (%s)', $relationship, get_class($this)) |
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); |
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} |
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$map = $this->relationships[$relationship]; |
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foreach ([ |
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'defined_in' => ['table', 'primary', 'entity'], |
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'target' => ['table', 'primary', 'relationship'] |
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] as $key => $value) { |
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if (! array_key_exists($key, $map) || ! is_array($map[$key])) { |
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throw new RuntimeException( |
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sprintf( |
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'Relationship (%s) should contain the (%s) key and should be of type array on (%s)', |
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$relationship, $key, get_class($this) |
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) |
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); |
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} |
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if (! empty(array_diff($value, array_keys($map[$key])))) { |
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throw new RuntimeException( |
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sprintf( |
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'(%s) for relationship (%s) should contain keys (%s) on (%s)', |
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$key, $relationship, implode(', ', $value), get_class($this) |
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) |
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); |
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} |
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} |
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return $map; |
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} |
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/** |
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* Returns table that repository is reading from. |
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* |
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* @return string |
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*/ |
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abstract protected function getTable(); |
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} |
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acredula /
percy
