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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Serializer\Mapping\Loader;
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13
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14 use Symfony\Component\Serializer\Exception\MappingException;
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15 use Symfony\Component\Serializer\Mapping\ClassMetadataInterface;
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16
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17 /**
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18 * Calls multiple {@link LoaderInterface} instances in a chain.
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19 *
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20 * This class accepts multiple instances of LoaderInterface to be passed to the
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21 * constructor. When {@link loadClassMetadata()} is called, the same method is called
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22 * in <em>all</em> of these loaders, regardless of whether any of them was
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23 * successful or not.
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24 *
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25 * @author Bernhard Schussek <bschussek@gmail.com>
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26 * @author Kévin Dunglas <dunglas@gmail.com>
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27 */
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28 class LoaderChain implements LoaderInterface
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29 {
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30 private $loaders;
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31
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32 /**
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33 * Accepts a list of LoaderInterface instances.
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34 *
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35 * @param LoaderInterface[] $loaders An array of LoaderInterface instances
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36 *
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37 * @throws MappingException If any of the loaders does not implement LoaderInterface
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38 */
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39 public function __construct(array $loaders)
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40 {
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41 foreach ($loaders as $loader) {
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42 if (!$loader instanceof LoaderInterface) {
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43 throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', \get_class($loader)));
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44 }
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45 }
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46
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47 $this->loaders = $loaders;
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48 }
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49
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50 /**
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51 * {@inheritdoc}
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52 */
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53 public function loadClassMetadata(ClassMetadataInterface $metadata)
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54 {
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55 $success = false;
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56
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57 foreach ($this->loaders as $loader) {
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58 $success = $loader->loadClassMetadata($metadata) || $success;
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59 }
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60
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61 return $success;
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62 }
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63
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64 /**
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65 * @return LoaderInterface[]
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66 */
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67 public function getLoaders()
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68 {
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69 return $this->loaders;
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70 }
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71 }
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