| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | /* | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * This file is part of the Ivory Serializer package. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * (c) Eric GELOEN <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * For the full copyright and license information, please read the LICENSE | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * file that was distributed with this source code. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | namespace Ivory\Serializer\Mapping\Loader; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  * @author GeLo <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | abstract class AbstractReflectionClassMetadataLoader extends AbstractClassMetadataLoader | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |      * @param \ReflectionProperty $property | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |      * @return mixed[]|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |     abstract protected function loadProperty(\ReflectionProperty $property); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 28 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 29 | 1288 |  |     protected function loadData($class) | 
            
                                                                        
                            
            
                                    
            
            
                | 30 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 31 | 1288 |  |         $reflection = new \ReflectionClass($class); | 
            
                                                                        
                            
            
                                    
            
            
                | 32 | 1288 |  |         $result = $this->loadClass($reflection); | 
            
                                                                        
                            
            
                                    
            
            
                | 33 | 1288 |  |         $properties = []; | 
            
                                                                        
                            
            
                                    
            
            
                | 34 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 35 | 1288 |  |         foreach ($reflection->getMethods() as $method) { | 
            
                                                                        
                            
            
                                    
            
            
                | 36 | 1276 |  |             if ($method->class !== $class) { | 
            
                                                                        
                            
            
                                    
            
            
                | 37 |  |  |                 continue; | 
            
                                                                        
                            
            
                                    
            
            
                | 38 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 39 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 40 | 1276 |  |             if (($methodName = $this->validateMethod($method->name)) === null) { | 
            
                                                                        
                            
            
                                    
            
            
                | 41 | 1276 |  |                 continue; | 
            
                                                                        
                            
            
                                    
            
            
                | 42 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 43 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 44 | 504 |  |             $data = $this->loadMethod($method); | 
            
                                                                        
                            
            
                                    
            
            
                | 45 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 46 | 504 |  |             if (is_array($data)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 47 | 286 |  |                 $properties[$methodName] = $data; | 
            
                                                                        
                            
            
                                    
            
            
                | 48 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 49 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 50 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 51 | 1288 |  |         foreach ($reflection->getProperties() as $property) { | 
            
                                                                        
                            
            
                                    
            
            
                | 52 | 1276 |  |             if ($property->class !== $class) { | 
            
                                                                        
                            
            
                                    
            
            
                | 53 |  |  |                 continue; | 
            
                                                                        
                            
            
                                    
            
            
                | 54 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 55 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 56 | 1276 |  |             $data = $this->loadProperty($property); | 
            
                                                                        
                            
            
                                    
            
            
                | 57 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 58 | 1276 |  |             if (is_array($data)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 59 | 1276 |  |                 $name = $property->getName(); | 
            
                                                                        
                            
            
                                    
            
            
                | 60 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 61 | 1276 |  |                 $properties[$name] = isset($properties[$name]) | 
            
                                                                        
                            
            
                                    
            
            
                | 62 | 68 |  |                     ? array_merge_recursive($properties[$name], $data) | 
            
                                                                        
                            
            
                                    
            
            
                | 63 | 1274 |  |                     : $data; | 
            
                                                                        
                            
            
                                    
            
            
                | 64 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 65 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 66 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 67 | 1288 |  |         if (!empty($properties)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 68 | 1276 |  |             $result['properties'] = $properties; | 
            
                                                                        
                            
            
                                    
            
            
                | 69 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 70 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 71 | 1288 |  |         if (!empty($result)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 72 | 1276 |  |             return $result; | 
                            
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                | 73 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 74 | 12 |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |      * @param \ReflectionClass $class | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |      * @return mixed[] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 | 1288 |  |     protected function loadClass(\ReflectionClass $class) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 | 1288 |  |         return []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |      * @param \ReflectionMethod $method | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |      * @return mixed[]|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 | 480 |  |     protected function loadMethod(\ReflectionMethod $method) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 | 480 |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |      * @param string $method | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |      * @return string|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 | 1276 |  |     private function validateMethod($method) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 | 1276 |  |         $prefix = substr($method, 0, 3); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 | 1276 |  |         if ($prefix === 'get' || $prefix === 'set' || $prefix === 'has') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 | 504 |  |             return lcfirst(substr($method, 3)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 | 1276 |  |         $prefix = substr($prefix, 0, 2); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 | 1276 |  |         if ($prefix === 'is') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 | 200 |  |             return lcfirst(substr($method, 2)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 | 1276 |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 114 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 115 |  |  |  | 
            
                        
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.