annotate src/implab/di/ActivationContext.js @ 33:8af8e840dd49

added return fn
author nickolay
date Wed, 05 Jun 2019 17:44:17 +0300
parents f750c89976d3
children
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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 "../log/trace!"
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7 ], function (declare, safe, Descriptor, Value, trace) {
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8 var Context = declare(null, {
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9
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10 _cache: null,
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11
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12 _services: null,
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13
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14 _stack: null,
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16 _visited: null,
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17
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18 container: null,
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20 _trace: true,
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21
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22 constructor: function (container, services, cache, visited) {
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23 safe.argumentNotNull(container, "container");
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24 safe.argumentNotNull(services, "services");
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25
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26 this._visited = visited || {};
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27 this._stack = [];
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28 this._cache = cache || {};
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29 this._services = services;
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30 this.container = container;
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31 },
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32
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33 getService: function (name, def) {
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34 var d = this._services[name];
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35
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36 if (!d)
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37 if (arguments.length > 1)
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38 return def;
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39 else
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40 throw new Error("Service '" + name + "' not found");
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41
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42 return d.activate(this, name);
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43 },
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44
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45 /**
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46 * registers services local to the the activation context
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47 *
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48 * @name{string} the name of the service
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49 * @service{string} the service descriptor to register
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50 */
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51 register: function (name, service) {
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52 safe.argumentNotEmptyString(name, "name");
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53
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54 if (!(service instanceof Descriptor))
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55 service = new Value(service, true);
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56 this._services[name] = service;
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57 },
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58
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59 clone: function () {
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60 return new Context(
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61 this.container,
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62 Object.create(this._services),
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63 this._cache,
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64 this._visited
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65 );
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66
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67 },
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68
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69 has: function (id) {
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70 return id in this._cache;
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71 },
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72
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73 get: function (id) {
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74 return this._cache[id];
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75 },
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76
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77 store: function (id, value) {
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78 return (this._cache[id] = value);
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79 },
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80
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81 parse: function (data, name) {
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82 var me = this;
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83 if (safe.isPrimitive(data))
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84 return data;
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85
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86 if (data instanceof Descriptor) {
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87 return data.activate(this, name);
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88 } else if (data instanceof Array) {
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89 me.enter(name);
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90 var v = data.map(function (x, i) {
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91 return me.parse(x, "." + i);
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92 });
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93 me.leave();
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94 return v;
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95 } else {
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96 me.enter(name);
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97 var result = {};
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98 for (var p in data)
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99 result[p] = me.parse(data[p], "." + p);
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100 me.leave();
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101 return result;
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102 }
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103 },
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104
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105 visit: function (id) {
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106 var count = this._visited[id] || 0;
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107 this._visited[id] = count + 1;
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108 return count;
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109 },
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110
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111 getStack: function () {
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112 return this._stack.slice().reverse();
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113 },
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114
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115 enter: function (name, d, localize) {
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116 if (this._trace)
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117 trace.log("enter " + name + " " + (d || "") +
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118 (localize ? " localize" : ""));
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119 this._stack.push({
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120 name: name,
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121 service: d,
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122 scope: this._services
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123 });
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124 if (localize)
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125 this._services = Object.create(this._services);
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126 },
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127
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128 leave: function () {
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129 var ctx = this._stack.pop();
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130 this._services = ctx.scope;
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131
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132 if (this._trace)
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133 trace.log("leave " + ctx.name + " " + (ctx.service || ""));
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134 }
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135 });
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136
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137 return Context;
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138 });