annotate src/implab/di/ActivationContext.js @ 21:7c22fc01fcec

rewritten ./text/template-compile
author cin
date Thu, 30 Nov 2017 11:01:22 +0300
parents 00779cb63b12
children f750c89976d3
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1 define([
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2 "../declare",
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3 "../safe",
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4 "./Descriptor",
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5 "./ValueDescriptor"
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6 ],
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7
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8 function (declare, safe, Descriptor, Value) {
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9 var Context = declare(null, {
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10
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11 _cache: null,
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12
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13 _services: null,
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14
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15 _stack: null,
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16
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17 _visited: null,
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18
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19 container: null,
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20
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21 _trace: false,
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22
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23 constructor: function (container, services, cache, visited) {
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24 safe.argumentNotNull(container, "container");
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25 safe.argumentNotNull(services, "services");
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26
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27 this._visited = visited || {};
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28 this._stack = [];
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29 this._cache = cache || {};
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30 this._services = services;
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31 this.container = container;
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32 },
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33
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34 getService: function (name, def) {
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35 var d = this._services[name];
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36
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37 if (!d)
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38 if (arguments.length > 1)
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39 return def;
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40 else
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41 throw new Error("Service '" + name + "' not found");
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42
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43 return d.activate(this, name);
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44 },
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45
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46 /**
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47 * registers services local to the the activation context
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48 *
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49 * @name{string} the name of the service
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50 * @service{string} the service descriptor to register
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51 */
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52 register: function (name, service) {
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53 safe.argumentNotEmptyString(name, "name");
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54
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55 if (!(service instanceof Descriptor))
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56 service = new Value(service, true);
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57 this._services[name] = service;
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58 },
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59
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60 clone: function () {
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61 return new Context(
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62 this.container,
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63 Object.create(this._services),
0
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64 this._cache,
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65 this._visited
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66 );
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67
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68 },
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69
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70 has: function (id) {
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71 return id in this._cache;
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72 },
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73
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74 get: function (id) {
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75 return this._cache[id];
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76 },
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77
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78 store: function (id, value) {
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79 return (this._cache[id] = value);
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80 },
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81
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82 parse: function (data, name) {
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83 var me = this;
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84 if (safe.isPrimitive(data))
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85 return data;
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86
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87 if (data instanceof Descriptor) {
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88 return data.activate(this, name);
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89 } else if (data instanceof Array) {
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90 me.enter(name);
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91 var v = data.map(function (x, i) {
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92 return me.parse(x, "." + i);
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93 });
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94 me.leave();
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95 return v;
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96 } else {
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97 me.enter(name);
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98 var result = {};
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99 for (var p in data)
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100 result[p] = me.parse(data[p], "." + p);
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101 me.leave();
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102 return result;
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103 }
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104 },
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105
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106 visit: function (id) {
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107 var count = this._visited[id] || 0;
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108 this._visited[id] = count + 1;
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109 return count;
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110 },
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111
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112 getStack: function () {
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113 return this._stack.slice().reverse();
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114 },
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115
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116 enter: function (name, d, localize) {
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117 if (this._trace)
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118 console.log("enter " + name + " " + (d || "") +
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119 (localize ? " localize" : ""));
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120 this._stack.push({
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121 name: name,
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122 service: d,
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123 scope: this._services
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124 });
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125 if (localize)
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126 this._services = Object.create(this._services);
0
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127 },
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128
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129 leave: function () {
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130 var ctx = this._stack.pop();
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131 this._services = ctx.scope;
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132
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133 if (this._trace)
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134 console.log("leave " + ctx.name + " " + (ctx.service || ""));
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135 }
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136 });
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137
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138 return Context;
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139 });