Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like VocabularyConfig often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use VocabularyConfig, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 6 | class VocabularyConfig extends BaseConfig  | 
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| 7 | { | 
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| 8 | private $plugins;  | 
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| 9 | private $pluginParameters;  | 
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| 10 | private $languageOrderCache = array();  | 
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| 11 | |||
| 12 | public function __construct($resource, $globalPlugins=array())  | 
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| 13 |     { | 
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| 14 | $this->resource = $resource;  | 
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| 15 |         $plugins = $this->resource->allLiterals('skosmos:usePlugin'); | 
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| 16 | $pluginArray = array();  | 
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| 17 |         if ($plugins) { | 
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| 18 |             foreach ($plugins as $pluginlit) { | 
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| 19 | $pluginArray[] = $pluginlit->getValue();  | 
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| 20 | }  | 
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| 21 | }  | 
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| 22 | $this->plugins = new PluginRegister(array_merge($globalPlugins, $pluginArray));  | 
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| 23 | // Get parameterized plugins defined as resources and their respective parameters  | 
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| 24 |         $pluginResources = $this->resource->allResources('skosmos:useParamPlugin'); | 
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| 25 | $this->pluginParameters = array();  | 
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| 26 |         if ($pluginResources) { | 
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| 27 |             foreach ($pluginResources as $pluginResource) { | 
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| 28 |                 $pluginName = $pluginResource->getLiteral('skosmos:usePlugin')->getValue(); | 
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| 29 | $this->pluginParameters[$pluginName] = array();  | 
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| 30 | |||
| 31 |                 $pluginParams = $pluginResource->allResources('skosmos:parameters'); | 
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| 32 |                 foreach ($pluginParams as $parameter) { | 
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| 33 | |||
| 34 |                     $paramLiterals = $parameter->allLiterals('schema:value'); | 
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| 35 |                     foreach ($paramLiterals as $paramLiteral) { | 
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| 36 |                         $paramName = $parameter->getLiteral('schema:propertyID')->getValue(); | 
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| 37 | $paramValue = $paramLiteral->getValue();  | 
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| 38 | $paramLang = $paramLiteral->getLang();  | 
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| 39 |                         if ($paramLang) { | 
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| 40 | $paramName .= '_' . $paramLang;  | 
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| 41 | }  | 
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| 42 | $this->pluginParameters[$pluginName][$paramName] = $paramValue;  | 
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| 43 | }  | 
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| 44 | }  | 
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| 45 | $pluginArray[] = $pluginName;  | 
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| 46 | }  | 
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| 47 | $this->plugins = new PluginRegister(array_merge($globalPlugins, $pluginArray));  | 
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| 48 | }  | 
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| 49 | |||
| 50 | }  | 
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| 51 | |||
| 52 | /**  | 
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| 53 | * Get the default language of this vocabulary  | 
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| 54 | * @return string default language, e.g. 'en'  | 
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| 55 | */  | 
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| 56 | |||
| 57 | public function getDefaultLanguage()  | 
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| 58 |     { | 
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| 59 |         $deflang = $this->resource->getLiteral('skosmos:defaultLanguage'); | 
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| 60 |         if ($deflang) { | 
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| 61 | return $deflang->getValue();  | 
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| 62 | }  | 
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| 63 | |||
| 64 | $langs = $this->getLanguages();  | 
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| 65 | $deflang = reset($langs); // picking the first one from the list with reset since the keys are not numeric  | 
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| 66 |         if (sizeof($langs) > 1) { | 
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| 67 |             trigger_error("Default language for vocabulary '" . $this->getShortName() . "' unknown, choosing '$deflang'.", E_USER_WARNING); | 
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| 68 | }  | 
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| 69 | |||
| 70 | return $deflang;  | 
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| 71 | }  | 
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| 72 | |||
| 73 | /**  | 
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| 74 | * Whether the alphabetical index is small enough to be shown all at once.  | 
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| 75 | * @return boolean true if all concepts can be shown at once.  | 
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| 76 | */  | 
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| 77 | public function getAlphabeticalFull()  | 
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| 78 |     { | 
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| 79 |         return $this->getBoolean('skosmos:fullAlphabeticalIndex'); | 
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| 80 | }  | 
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| 81 | |||
| 82 | /**  | 
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| 83 | * Returns a short name for a vocabulary if configured. If that has not been set  | 
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| 84 | * using vocabId as a fallback.  | 
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| 85 | * @return string  | 
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| 86 | */  | 
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| 87 | public function getShortName()  | 
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| 88 |     { | 
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| 89 |         $shortname = $this->getLiteral('skosmos:shortName'); | 
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| 90 | if ($shortname)  | 
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| 91 | return $shortname;  | 
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| 92 | |||
| 93 | // if no shortname exists fall back to the id  | 
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| 94 | return $this->getId();  | 
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| 95 | }  | 
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| 96 | |||
| 97 | /**  | 
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| 98 | * Get the vocabulary feedback e-mail address and return it.  | 
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| 99 | *  | 
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| 100 | * @return string e-mail address or null if not defined.  | 
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| 101 | */  | 
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| 102 | public function getFeedbackRecipient()  | 
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| 103 |     { | 
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| 104 |         $email = $this->resource->get('skosmos:feedbackRecipient'); | 
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| 105 | return isset($email) ? $email->getValue() : null;  | 
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| 106 | }  | 
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| 107 | |||
| 108 | /**  | 
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| 109 | * Returns the human readable vocabulary title.  | 
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| 110 | * @return string the title of the vocabulary  | 
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| 111 | */  | 
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| 112 | public function getTitle($lang = null)  | 
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| 113 |     { | 
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| 114 |         return $this->getLiteral('dc:title', false, $lang); | 
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| 
                                                                                                    
                        
                         | 
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| 115 | }  | 
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| 116 | |||
| 117 | /**  | 
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| 118 | * Returns a boolean value set in the config.ttl config.  | 
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| 119 | * @return boolean  | 
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| 120 | */  | 
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| 121 | public function sortByNotation()  | 
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| 122 |     { | 
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| 123 |         return $this->getBoolean('skosmos:sortByNotation'); | 
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| 124 | }  | 
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| 125 | |||
| 126 | /**  | 
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| 127 | * Returns a boolean value set in the config.ttl config.  | 
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| 128 | * @return boolean  | 
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| 129 | */  | 
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| 130 | public function showChangeList()  | 
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| 131 |     { | 
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| 132 |         return $this->getBoolean('skosmos:showChangeList'); | 
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| 133 | }  | 
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| 134 | |||
| 135 | /**  | 
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| 136 | * get the URLs from which the vocabulary data can be downloaded  | 
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| 137 | * @return array Array with MIME type as key, URL as value  | 
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| 138 | */  | 
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| 139 | public function getDataURLs()  | 
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| 140 |     { | 
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| 141 | $ret = array();  | 
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| 142 |         $urls = $this->resource->allResources("void:dataDump"); | 
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| 143 |         foreach ($urls as $url) { | 
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| 144 | // first try dc:format and dc11:format  | 
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| 145 |             $mimetypelit = $url->getLiteral('dc:format'); | 
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| 146 |             if ($mimetypelit === null) { | 
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| 147 |                 $mimetypelit = $url->getLiteral('dc11:format'); | 
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| 148 | }  | 
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| 149 | |||
| 150 |             if ($mimetypelit !== null) { | 
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| 151 | $mimetype = $mimetypelit->getValue();  | 
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| 152 |             } else { | 
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| 153 | $format = EasyRdf\Format::guessFormat(null, $url->getURI());  | 
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| 154 |                 if ($format === null) { | 
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| 155 |                     trigger_error("Could not guess format for <$url>.", E_USER_WARNING); | 
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| 156 | continue;  | 
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| 157 | }  | 
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| 158 | $mimetypes = array_keys($format->getMimeTypes());  | 
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| 159 | $mimetype = $mimetypes[0];  | 
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| 160 | }  | 
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| 161 | |||
| 162 |             $langLit = $url->getLiteral('dc:language'); | 
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| 163 | |||
| 164 |             if ($langLit != null) { | 
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| 165 | //when the mimetype has language variants  | 
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| 166 | $dataUrlLang = $langLit->getValue();  | 
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| 167 | |||
| 168 |                 if (!isset($ret[$mimetype])) { | 
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| 169 | $arr = array();  | 
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| 170 |                 } else { | 
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| 171 | $arr = $ret[$mimetype];  | 
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| 172 | }  | 
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| 173 | $arr[$dataUrlLang] = $url->getURI();  | 
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| 174 | $ret[$mimetype] = $arr;  | 
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| 175 |             } else { | 
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| 176 | $ret[$mimetype] = $url->getURI();  | 
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| 177 | }  | 
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| 178 | }  | 
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| 179 | return $ret;  | 
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| 180 | }  | 
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| 181 | |||
| 182 | /**  | 
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| 183 | * Returns the main Concept Scheme URI of that Vocabulary,  | 
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| 184 | * or null if not set.  | 
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| 185 | * @return string concept scheme URI or null  | 
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| 186 | */  | 
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| 187 | |||
| 188 | public function getMainConceptSchemeURI()  | 
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| 189 |     { | 
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| 190 |         $val = $this->resource->getResource("skosmos:mainConceptScheme"); | 
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| 191 |         if ($val) { | 
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| 192 | return $val->getURI();  | 
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| 193 | }  | 
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| 194 | |||
| 195 | return null;  | 
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| 196 | }  | 
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| 197 | |||
| 198 | /**  | 
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| 199 | * Returns the class URI used for concept groups in this vocabulary,  | 
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| 200 | * or null if not set.  | 
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| 201 | * @return string group class URI or null  | 
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| 202 | */  | 
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| 203 | |||
| 204 | public function getGroupClassURI()  | 
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| 205 |     { | 
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| 206 |         $val = $this->resource->getResource("skosmos:groupClass"); | 
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| 207 |         if ($val) { | 
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| 208 | return $val->getURI();  | 
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| 209 | }  | 
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| 210 | |||
| 211 | return null;  | 
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| 212 | }  | 
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| 213 | |||
| 214 | /**  | 
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| 215 | * Returns the class URI used for thesaurus arrays in this vocabulary,  | 
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| 216 | * or null if not set.  | 
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| 217 | * @return string array class URI or null  | 
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| 218 | */  | 
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| 219 | |||
| 220 | public function getArrayClassURI()  | 
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| 221 |     { | 
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| 222 |         $val = $this->resource->getResource("skosmos:arrayClass"); | 
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| 223 |         if ($val) { | 
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| 224 | return $val->getURI();  | 
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| 225 | }  | 
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| 226 | |||
| 227 | return null;  | 
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| 228 | }  | 
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| 229 | |||
| 230 | /**  | 
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| 231 | * Returns custom properties displayed on the search page if configured.  | 
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| 232 | * @return string array class URI or null  | 
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| 233 | */  | 
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| 234 | |||
| 235 | View Code Duplication | public function getAdditionalSearchProperties()  | 
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| 236 |     { | 
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| 237 |         $resources = $this->resource->allResources("skosmos:showPropertyInSearch"); | 
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| 238 | $ret = array();  | 
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| 239 |         foreach ($resources as $res) { | 
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| 240 | $prop = $res->getURI();  | 
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| 241 | if (EasyRdf\RdfNamespace::shorten($prop) !== null) // shortening property labels if possible  | 
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| 242 |             { | 
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| 243 | $prop = EasyRdf\RdfNamespace::shorten($prop);  | 
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| 244 | }  | 
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| 245 | |||
| 246 | $ret[] = $prop;  | 
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| 247 | }  | 
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| 248 | return $ret;  | 
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| 249 | }  | 
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| 250 | |||
| 251 | /**  | 
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| 252 | * Queries whether the property should be shown with all the label language variations.  | 
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| 253 | * @param string $property  | 
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| 254 | * @return boolean  | 
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| 255 | */  | 
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| 256 | public function hasMultiLingualProperty($property)  | 
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| 257 |     { | 
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| 258 |         $resources = $this->resource->allResources("skosmos:hasMultiLingualProperty"); | 
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| 259 |         foreach ($resources as $res) { | 
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| 260 | $prop = $res->getURI();  | 
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| 261 | if (EasyRdf\RdfNamespace::shorten($prop) !== null) // shortening property labels if possible  | 
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| 262 |             { | 
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| 263 | $prop = EasyRdf\RdfNamespace::shorten($prop);  | 
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| 264 | }  | 
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| 265 | |||
| 266 |             if ($prop === $property) { | 
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| 267 | return true;  | 
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| 268 | }  | 
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| 269 | |||
| 270 | }  | 
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| 271 | return false;  | 
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| 272 | }  | 
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| 273 | |||
| 274 | /**  | 
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| 275 | * Returns a boolean value set in the config.ttl config.  | 
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| 276 | * @return boolean  | 
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| 277 | */  | 
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| 278 | public function getShowHierarchy()  | 
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| 279 |     { | 
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| 280 |         return $this->getBoolean('skosmos:showTopConcepts'); | 
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| 281 | }  | 
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| 282 | |||
| 283 | /**  | 
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| 284 | * Returns a boolean value set in the config.ttl config.  | 
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| 285 | * @return boolean  | 
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| 286 | */  | 
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| 287 | public function showConceptSchemesInHierarchy()  | 
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| 288 |     { | 
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| 289 |         return $this->getBoolean('skosmos:conceptSchemesInHierarchy'); | 
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| 290 | }  | 
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| 291 | |||
| 292 | /**  | 
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| 293 | * Returns a boolean value set in the config.ttl config.  | 
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| 294 | * @return boolean defaults to true if fetching hasn't been explicitly denied.  | 
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| 295 | */  | 
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| 296 | public function getExternalResourcesLoading()  | 
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| 297 |     { | 
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| 298 |         return $this->getBoolean('skosmos:loadExternalResources', true); | 
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| 299 | }  | 
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| 300 | |||
| 301 | /**  | 
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| 302 | * Returns a boolean value set in the config.ttl config.  | 
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| 303 | * @return boolean  | 
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| 304 | */  | 
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| 305 | public function getShowLangCodes()  | 
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| 306 |     { | 
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| 307 |         return $this->getBoolean('skosmos:explicitLanguageTags'); | 
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| 308 | }  | 
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| 309 | |||
| 310 | /**  | 
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| 311 | * Returns a boolean value set in the config.ttl config.  | 
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| 312 | * @return boolean  | 
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| 313 | */  | 
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| 314 | public function searchByNotation()  | 
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| 315 |     { | 
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| 316 |         return $this->getBoolean('skosmos:searchByNotation'); | 
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| 317 | }  | 
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| 318 | |||
| 319 | /**  | 
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| 320 | * Returns skosmos:marcSourcecode value set in config.ttl.  | 
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| 321 | * @return string marcsource name  | 
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| 322 | */  | 
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| 323 | public function getMarcSourceCode($lang = null)  | 
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| 324 |     { | 
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| 325 |         return $this->getLiteral('skosmos:marcSourceCode', false, $lang); | 
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| 326 | }  | 
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| 327 | |||
| 328 | /**  | 
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| 329 | * Returns a boolean value set in the config.ttl config.  | 
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| 330 | * @return array array of concept class URIs (can be empty)  | 
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| 331 | */  | 
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| 332 | public function getIndexClasses()  | 
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| 333 |     { | 
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| 334 |         return $this->getResources("skosmos:indexShowClass"); | 
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| 335 | }  | 
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| 336 | |||
| 337 | /**  | 
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| 338 | * Returns skosmos:externalProperty values set in the config.ttl config.  | 
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| 339 | * @return array array of external property URIs (can be empty)  | 
            ||
| 340 | */  | 
            ||
| 341 | public function getExtProperties()  | 
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| 342 |     { | 
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| 343 |         return $this->getResources("skosmos:externalProperty"); | 
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| 344 | }  | 
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| 345 | |||
| 346 | /**  | 
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| 347 | * Get the languages supported by this vocabulary  | 
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| 348 | * @return array languages supported by this vocabulary (as language tag strings)  | 
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| 349 | */  | 
            ||
| 350 | public function getLanguages()  | 
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| 351 |     { | 
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| 352 |         $langs = $this->resource->allLiterals('skosmos:language'); | 
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| 353 | $ret = array();  | 
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| 354 |         foreach ($langs as $lang) { | 
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| 355 | $langlit = Punic\Language::getName($lang->getValue(), $this->getEnvLang());  | 
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| 356 | $ret[$langlit] = $lang->getValue();  | 
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| 357 | }  | 
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| 358 | ksort($ret);  | 
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| 359 | |||
| 360 | return $ret;  | 
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| 361 | }  | 
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| 362 | |||
| 363 | /**  | 
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| 364 | * Returns the plugin parameters  | 
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| 365 | * @return string plugin parameters or null  | 
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| 366 | */  | 
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| 367 |     public function getPluginParameters() { | 
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| 368 | return json_encode($this->pluginParameters, true);  | 
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| 369 | }  | 
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| 370 | |||
| 371 | /**  | 
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| 372 | * Returns the vocabulary default sidebar view.  | 
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| 373 | * @return string name of the view  | 
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| 374 | */  | 
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| 375 | public function getDefaultSidebarView()  | 
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| 376 |     { | 
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| 377 |         $defview = $this->resource->getLiteral('skosmos:defaultSidebarView'); | 
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| 378 |         if ($defview) { | 
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| 379 | $value = $defview->getValue();  | 
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| 380 |             if ($value === 'groups' || $value === 'hierarchy') { | 
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| 381 | return $value;  | 
            ||
| 382 | }  | 
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| 383 | |||
| 384 | }  | 
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| 385 |         if ($this->showAlphabeticalIndex() === false) { | 
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| 386 |             if ($this->getShowHierarchy()) { | 
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| 387 | return 'hierarchy';  | 
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| 388 |             } else if ($this->getGroupClassURI()) { | 
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| 389 | return 'groups';  | 
            ||
| 390 | }  | 
            ||
| 391 | }  | 
            ||
| 392 | return 'alphabetical'; // if not defined displaying the alphabetical index  | 
            ||
| 393 | }  | 
            ||
| 394 | |||
| 395 | /**  | 
            ||
| 396 | * Extracts the vocabulary id string from the baseuri of the vocabulary.  | 
            ||
| 397 | * @return string identifier eg. 'mesh'.  | 
            ||
| 398 | */  | 
            ||
| 399 | public function getId()  | 
            ||
| 400 |     { | 
            ||
| 401 |         $uriparts = explode("#", $this->resource->getURI()); | 
            ||
| 402 | if (count($uriparts) != 1)  | 
            ||
| 403 | // hash namespace  | 
            ||
| 404 |         { | 
            ||
| 405 | return $uriparts[1];  | 
            ||
| 406 | }  | 
            ||
| 407 | |||
| 408 | // slash namespace  | 
            ||
| 409 |         $uriparts = explode("/", $this->resource->getURI()); | 
            ||
| 410 | |||
| 411 | return $uriparts[count($uriparts) - 1];  | 
            ||
| 412 | }  | 
            ||
| 413 | |||
| 414 |     public function getShowStatistics() { | 
            ||
| 415 |         return $this->getBoolean('skosmos:showStatistics', true); | 
            ||
| 416 | }  | 
            ||
| 417 | |||
| 418 | public function getPlugins()  | 
            ||
| 419 |     { | 
            ||
| 420 | return $this->plugins;  | 
            ||
| 421 | }  | 
            ||
| 422 | |||
| 423 | /**  | 
            ||
| 424 | * Returns the property/properties used for visualizing concept hierarchies.  | 
            ||
| 425 | * @return string array class URI or null  | 
            ||
| 426 | */  | 
            ||
| 427 | |||
| 428 | View Code Duplication | public function getHierarchyProperty()  | 
            |
| 443 | |||
| 444 | /**  | 
            ||
| 445 | * Returns a boolean value set in the config.ttl config.  | 
            ||
| 446 | * @return boolean  | 
            ||
| 447 | */  | 
            ||
| 448 | public function showNotation()  | 
            ||
| 452 | |||
| 453 | /**  | 
            ||
| 454 | * Returns a boolean value set in the config.ttl config.  | 
            ||
| 455 | * @return boolean  | 
            ||
| 456 | */  | 
            ||
| 457 | public function showAlphabeticalIndex()  | 
            ||
| 461 | |||
| 462 | /**  | 
            ||
| 463 | * Returns the alphabetical list qualifier in this vocabulary,  | 
            ||
| 464 | * or null if not set.  | 
            ||
| 465 | * @return EasyRdf\Resource|null alphabetical list qualifier resource or null  | 
            ||
| 466 | */  | 
            ||
| 467 | public function getAlphabeticalListQualifier()  | 
            ||
| 468 |     { | 
            ||
| 469 |         return $this->resource->getResource('skosmos:alphabeticalListQualifier'); | 
            ||
| 470 | }  | 
            ||
| 471 | |||
| 472 | /**  | 
            ||
| 473 | * Returns a boolean value set in the config.ttl config.  | 
            ||
| 474 | * @return boolean  | 
            ||
| 475 | */  | 
            ||
| 476 | public function getShowDeprecated()  | 
            ||
| 477 |     { | 
            ||
| 478 |         return $this->getBoolean('skosmos:showDeprecated', false); | 
            ||
| 479 | }  | 
            ||
| 480 | |||
| 481 | /**  | 
            ||
| 482 | * Returns the vocabulary dc:type value(s) with their labels and uris, if set in the vocabulary configuration.  | 
            ||
| 483 | * @return array of objects or an empty array  | 
            ||
| 484 | */  | 
            ||
| 485 | public function getTypes($lang = null)  | 
            ||
| 486 |     { | 
            ||
| 487 |         $resources = $this->resource->allResources("dc:type"); | 
            ||
| 488 | $ret = array();  | 
            ||
| 489 |         foreach ($resources as $res) { | 
            ||
| 490 | $prop = $res->getURI();  | 
            ||
| 491 | $label = $res->label($lang) ? $res->label($lang) : $res->label($this->getDefaultLanguage());  | 
            ||
| 496 | |||
| 497 | /**  | 
            ||
| 498 | * Returns an array of fallback languages that is ordered by priority and  | 
            ||
| 499 | * defined in the vocabulary configuration as a collection.  | 
            ||
| 500 | * Additionally, the chosen content language is inserted with the highest priority  | 
            ||
| 501 | * and the vocab default language is inserted with the lowest priority.  | 
            ||
| 502 | * @param string $clang  | 
            ||
| 503 | * @return array of language code strings  | 
            ||
| 504 | */  | 
            ||
| 505 | public function getLanguageOrder($clang)  | 
            ||
| 529 | |||
| 530 | /**  | 
            ||
| 531 | * @return boolean  | 
            ||
| 532 | */  | 
            ||
| 533 | public function isUseModifiedDate()  | 
            ||
| 537 | }  | 
            ||
| 538 | 
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: