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<?php |
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/** |
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* TechDivision\Import\Observers\GenericCompositeObserver |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2016 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/techdivision/import |
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* @link http://www.techdivision.com |
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*/ |
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namespace TechDivision\Import\Observers; |
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use TechDivision\Import\Subjects\SubjectInterface; |
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/** |
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* A generic observer implementation that implements the composit pattern to bundle |
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* the necessary observers of a special use case to simplify configuration. |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2016 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/techdivision/import |
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* @link http://www.techdivision.com |
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*/ |
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class GenericCompositeObserver implements ObserverInterface |
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{ |
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/** |
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* The composite's subject instance. |
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* |
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* @var \TechDivision\Import\Subjects\SubjectInterface |
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*/ |
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protected $subject; |
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/** |
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* The actual row that will be processed by the composite's observers. |
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* |
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* @var array |
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*/ |
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protected $row = array(); |
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/** |
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* The array with the composite's observers. |
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* |
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* @var \TechDivision\Import\Observers\ObserverInterface[] |
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*/ |
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protected $observers = array(); |
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/** |
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* Will be invoked by the action on the events the listener has been registered for. |
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* |
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* @param \TechDivision\Import\Subjects\SubjectInterface $subject The subject instance |
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* |
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* @return array The modified row |
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*/ |
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public function handle(SubjectInterface $subject) |
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{ |
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// initialize the subject |
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$this->setSubject($subject); |
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// process the observers |
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foreach ($this->getObservers() as $observer) { |
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// query whether or not we have to skip the row |
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if ($subject->rowHasToBeSkipped()) { |
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// log a debug message with the actual line nr/file information |
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$subject->getSystemLogger()->warning( |
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$subject->appendExceptionSuffix( |
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sprintf( |
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'Skip processing operation "%s" after observer "%s"', |
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$subject->getOperationName(), |
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$subject->getConfiguration()->getId() |
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) |
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) |
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); |
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// skip the row |
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break; |
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} |
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// if not, set the subject and process the observer |
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$subject->setRow($observer->handle($subject)); |
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} |
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// returns the subject's row |
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return $subject->getRow(); |
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} |
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/** |
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* Return's the observer's subject instance. |
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* |
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* @return \TechDivision\Import\Subjects\SubjectInterface The observer's subject instance |
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*/ |
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public function getSubject() |
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{ |
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return $this->subject; |
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} |
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/** |
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* Adds the passed observer to the composites array with observers. |
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* |
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* @param \TechDivision\Import\Observers\ObserverInterface $observer The observer to add |
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* |
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* @return void |
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*/ |
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public function addObserver(ObserverInterface $observer) |
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{ |
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$this->observers[] = $observer; |
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} |
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/** |
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* Set's the obeserver's subject instance to initialize the observer with. |
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* |
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* @param \TechDivision\Import\Subjects\SubjectInterface $subject The observer's subject |
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* |
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* @return void |
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*/ |
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protected function setSubject(SubjectInterface $subject) |
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{ |
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$this->subject = $subject; |
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} |
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/** |
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* Returns the array with the composite's observers. |
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* |
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* @return \TechDivision\Import\Observers\ObserverInterface[] |
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*/ |
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protected function getObservers() |
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{ |
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return $this->observers; |
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} |
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} |
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techdivision /
import
