| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * File containing the LanguageHandler class. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * @copyright Copyright (C) eZ Systems AS. All rights reserved. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * @license For full copyright and license information view LICENSE file distributed with this source code. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | namespace eZ\Publish\Core\Persistence\Cache; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | use eZ\Publish\SPI\Persistence\Content\Language\Handler as ContentLanguageHandlerInterface; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | use eZ\Publish\SPI\Persistence\Content\Language; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | use eZ\Publish\SPI\Persistence\Content\Language\CreateStruct; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  * @see \eZ\Publish\SPI\Persistence\Content\Language\Handler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  | class ContentLanguageHandler extends AbstractHandler implements ContentLanguageHandlerInterface | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     public function create(CreateStruct $struct) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |         $this->logger->logCall(__METHOD__, array('struct' => $struct)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |         return $this->persistenceHandler->contentLanguageHandler()->create($struct); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |     public function update(Language $struct) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |         $this->logger->logCall(__METHOD__, array('struct' => $struct)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |         $return = $this->persistenceHandler->contentLanguageHandler()->update($struct); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |         $this->cache->invalidateTags(['language-' . $struct->id]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |         return $return; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 46 |  | View Code Duplication |     public function load($id) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |         $cacheItem = $this->cache->getItem('ez-language-' . $id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |         if ($cacheItem->isHit()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |             return $cacheItem->get(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |         $this->logger->logCall(__METHOD__, array('language' => $id)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |         $language = $this->persistenceHandler->contentLanguageHandler()->load($id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |         $cacheItem->set($language); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |         $cacheItem->tag('language-' . $language->id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |         $this->cache->save($cacheItem); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |         return $language; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |     public function loadList(array $ids): iterable | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |         return $this->getMultipleCacheItems( | 
                            
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                | 69 |  |  |             $ids, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |             'ez-language-', | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 71 |  | View Code Duplication |             function (array $cacheMissIds) { | 
                            
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                | 72 |  |  |                 $this->logger->logCall(__CLASS__ . '::loadList', ['languages' => $cacheMissIds]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |                 return $this->persistenceHandler->contentLanguageHandler()->loadList($cacheMissIds); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |             }, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |             function (Language $language) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |                 return ['language-' . $language->id]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 85 |  | View Code Duplication |     public function loadByLanguageCode($languageCode) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |         $cacheItem = $this->cache->getItem('ez-language-code-' . $languageCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |         if ($cacheItem->isHit()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |             return $cacheItem->get(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |         $this->logger->logCall(__METHOD__, array('language' => $languageCode)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |         $language = $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode($languageCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |         $cacheItem->set($language); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |         $cacheItem->tag('language-' . $language->id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |         $this->cache->save($cacheItem); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |         return $language; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |     public function loadListByLanguageCodes(array $languageCodes): iterable | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |         return $this->getMultipleCacheItems( | 
                            
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                | 108 |  |  |             $languageCodes, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |             'ez-language-code-', | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 110 |  | View Code Duplication |             function (array $cacheMissIds) { | 
                            
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                | 111 |  |  |                 $this->logger->logCall(__CLASS__ . '::loadListByLanguageCodes', ['languages' => $cacheMissIds]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |                 return $this->persistenceHandler->contentLanguageHandler()->loadListByLanguageCodes($cacheMissIds); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |             }, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |             function (Language $language) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |                 return ['language-' . $language->id]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |     public function loadAll() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |         $this->logger->logCall(__METHOD__); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |         return $this->persistenceHandler->contentLanguageHandler()->loadAll(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 133 |  |  |      */ | 
            
                                                        
            
                                    
            
            
                | 134 |  |  |     public function delete($id) | 
            
                                                        
            
                                    
            
            
                | 135 |  |  |     { | 
            
                                                        
            
                                    
            
            
                | 136 |  |  |         $this->logger->logCall(__METHOD__, array('language' => $id)); | 
            
                                                        
            
                                    
            
            
                | 137 |  |  |         $return = $this->persistenceHandler->contentLanguageHandler()->delete($id); | 
            
                                                        
            
                                    
            
            
                | 138 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 139 |  |  |         $this->cache->invalidateTags(['language-' . $id]); | 
            
                                                        
            
                                    
            
            
                | 140 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 141 |  |  |         return $return; | 
            
                                                        
            
                                    
            
            
                | 142 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 143 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 144 |  |  |  | 
            
                        
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.