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1 | <?php namespace jwe\compression_algorithms; |
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2 | /** |
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3 | * Copyright 2015 OpenStack Foundation |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * http://www.apache.org/licenses/LICENSE-2.0 |
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8 | * Unless required by applicable law or agreed to in writing, software |
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9 | * distributed under the License is distributed on an "AS IS" BASIS, |
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10 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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11 | * See the License for the specific language governing permissions and |
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12 | * limitations under the License. |
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13 | **/ |
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14 | use jwe\compression_algorithms\impl\Deflate; |
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15 | use jwe\compression_algorithms\impl\ZLib; |
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16 | use jwe\compression_algorithms\impl\GZip; |
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17 | /** |
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18 | * Class CompressionAlgorithms_Registry |
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19 | * @package jwe\compression_algorithms |
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20 | */ |
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21 | View Code Duplication | final class CompressionAlgorithms_Registry { |
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22 | |||
23 | /** |
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24 | * @var CompressionAlgorithms_Registry |
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25 | */ |
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26 | private static $instance; |
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27 | |||
28 | private $algorithms = []; |
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29 | |||
30 | private function __construct(){ |
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31 | |||
32 | $this->algorithms[CompressionAlgorithmsNames::Deflate] = new Deflate; |
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33 | $this->algorithms[CompressionAlgorithmsNames::GZip] = new GZip; |
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34 | $this->algorithms[CompressionAlgorithmsNames::ZLib] = new ZLib; |
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35 | |||
36 | } |
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37 | |||
38 | private function __clone(){} |
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39 | |||
40 | /** |
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41 | * @return CompressionAlgorithms_Registry |
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42 | */ |
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43 | public static function getInstance(){ |
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44 | if(!is_object(self::$instance)){ |
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45 | self::$instance = new CompressionAlgorithms_Registry(); |
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46 | } |
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47 | return self::$instance; |
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48 | } |
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49 | |||
50 | /** |
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51 | * @param string $alg |
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52 | * @return bool |
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53 | */ |
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54 | public function isSupported($alg){ |
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55 | return array_key_exists($alg, $this->algorithms); |
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56 | } |
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57 | |||
58 | /** |
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59 | * @param $alg |
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60 | * @return null|CompressionAlgorithm |
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61 | */ |
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62 | public function get($alg){ |
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63 | if(!$this->isSupported($alg)) return null; |
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64 | return $this->algorithms[$alg]; |
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65 | } |
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66 | } |
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.