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9 |
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10 | 'use strict';
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11 |
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12 | var _prodInvariant = require('./reactProdInvariant');
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13 |
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14 | var invariant = require('fbjs/lib/invariant');
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 |
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23 | var oneArgumentPooler = function (copyFieldsFrom) {
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24 | var Klass = this;
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25 | if (Klass.instancePool.length) {
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26 | var instance = Klass.instancePool.pop();
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27 | Klass.call(instance, copyFieldsFrom);
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28 | return instance;
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29 | } else {
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30 | return new Klass(copyFieldsFrom);
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31 | }
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32 | };
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33 |
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34 | var twoArgumentPooler = function (a1, a2) {
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35 | var Klass = this;
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36 | if (Klass.instancePool.length) {
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37 | var instance = Klass.instancePool.pop();
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38 | Klass.call(instance, a1, a2);
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39 | return instance;
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40 | } else {
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41 | return new Klass(a1, a2);
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42 | }
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43 | };
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44 |
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45 | var threeArgumentPooler = function (a1, a2, a3) {
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46 | var Klass = this;
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47 | if (Klass.instancePool.length) {
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48 | var instance = Klass.instancePool.pop();
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49 | Klass.call(instance, a1, a2, a3);
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50 | return instance;
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51 | } else {
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52 | return new Klass(a1, a2, a3);
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53 | }
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54 | };
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55 |
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56 | var fourArgumentPooler = function (a1, a2, a3, a4) {
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57 | var Klass = this;
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58 | if (Klass.instancePool.length) {
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59 | var instance = Klass.instancePool.pop();
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60 | Klass.call(instance, a1, a2, a3, a4);
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61 | return instance;
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62 | } else {
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63 | return new Klass(a1, a2, a3, a4);
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64 | }
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65 | };
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66 |
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67 | var standardReleaser = function (instance) {
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68 | var Klass = this;
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69 | !(instance instanceof Klass) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Trying to release an instance into a pool of a different type.') : _prodInvariant('25') : void 0;
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70 | instance.destructor();
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71 | if (Klass.instancePool.length < Klass.poolSize) {
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72 | Klass.instancePool.push(instance);
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73 | }
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74 | };
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75 |
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76 | var DEFAULT_POOL_SIZE = 10;
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77 | var DEFAULT_POOLER = oneArgumentPooler;
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78 |
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79 |
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80 |
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81 |
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82 |
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83 |
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84 |
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85 |
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86 |
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87 |
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88 | var addPoolingTo = function (CopyConstructor, pooler) {
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89 |
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90 |
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91 | var NewKlass = CopyConstructor;
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92 | NewKlass.instancePool = [];
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93 | NewKlass.getPooled = pooler || DEFAULT_POOLER;
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94 | if (!NewKlass.poolSize) {
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95 | NewKlass.poolSize = DEFAULT_POOL_SIZE;
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96 | }
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97 | NewKlass.release = standardReleaser;
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98 | return NewKlass;
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99 | };
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100 |
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101 | var PooledClass = {
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102 | addPoolingTo: addPoolingTo,
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103 | oneArgumentPooler: oneArgumentPooler,
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104 | twoArgumentPooler: twoArgumentPooler,
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105 | threeArgumentPooler: threeArgumentPooler,
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106 | fourArgumentPooler: fourArgumentPooler
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107 | };
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108 |
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109 | module.exports = PooledClass; |
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