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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\Validator\Mapping\Loader;
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13
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14 use Symfony\Component\Validator\Exception\MappingException;
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15 use Symfony\Component\Validator\Mapping\ClassMetadata;
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16
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17 /**
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18 * Loads validation metadata from multiple {@link LoaderInterface} instances.
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19 *
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20 * Pass the loaders when constructing the chain. Once
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21 * {@link loadClassMetadata()} is called, that method will be called on all
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22 * loaders in the chain.
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23 *
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24 * @author Bernhard Schussek <bschussek@gmail.com>
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25 */
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26 class LoaderChain implements LoaderInterface
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27 {
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28 protected $loaders;
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29
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30 /**
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31 * @param LoaderInterface[] $loaders The metadata loaders to use
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32 *
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33 * @throws MappingException If any of the loaders has an invalid type
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34 */
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35 public function __construct(array $loaders)
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36 {
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37 foreach ($loaders as $loader) {
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38 if (!$loader instanceof LoaderInterface) {
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39 throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', \get_class($loader)));
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40 }
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41 }
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42
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43 $this->loaders = $loaders;
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44 }
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45
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46 /**
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47 * {@inheritdoc}
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48 */
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49 public function loadClassMetadata(ClassMetadata $metadata)
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50 {
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51 $success = false;
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52
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53 foreach ($this->loaders as $loader) {
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54 $success = $loader->loadClassMetadata($metadata) || $success;
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55 }
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56
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57 return $success;
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58 }
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59
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60 /**
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61 * @return LoaderInterface[]
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62 */
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63 public function getLoaders()
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64 {
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65 return $this->loaders;
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66 }
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67 }
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