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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Wikibase\DataModel\Services\Diff;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Diff\DiffOp\Diff\Diff;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Diff\Patcher\PatcherException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Wikibase\DataModel\Services\Diff\Internal\AliasGroupListPatcher;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Wikibase\DataModel\Term\Fingerprint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since 3.13  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license GPL-2.0-or-later  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Jeroen De Dauw < [email protected] >  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Thiemo Kreuz  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class FingerprintPatcher { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var TermListPatcher  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private $termListPatcher;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var AliasGroupListPatcher  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private $aliasGroupListPatcher;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function __construct() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->termListPatcher = new TermListPatcher();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->aliasGroupListPatcher = new AliasGroupListPatcher();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param Fingerprint $fingerprint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param Diff $patch typically an {@link EntityDiff} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @throws PatcherException  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	public function patchFingerprint( Fingerprint $fingerprint, Diff $patch ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( !$patch->isAssociative() ) { | 
            
                            
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                			throw new PatcherException( '$patch must be associative' );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( isset( $patch['label'] ) ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->termListPatcher->patchTermList(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$fingerprint->getLabels(),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$patch['label']  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( isset( $patch['description'] ) ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->termListPatcher->patchTermList(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$fingerprint->getDescriptions(),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$patch['description']  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( isset( $patch['aliases'] ) ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->aliasGroupListPatcher->patchAliasGroupList(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$fingerprint->getAliasGroups(),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$patch['aliases']  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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If an expression can have both
false, andnullas possible values. It is generally a good practice to always use strict comparison to clearly distinguish between those two values.