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comparison core/src/js/di/ActivationContext.js @ 29:acdcdf1a8d21

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repository reorganized
author cin
date Tue, 26 Jun 2018 19:35:44 +0300
parents src/implab/di/ActivationContext.js@f750c89976d3
children
comparison
equal deleted inserted replaced
28:d796bbbe558c 29:acdcdf1a8d21
1 define([
2 "../declare",
3 "../safe",
4 "./Descriptor",
5 "./ValueDescriptor",
6 "../log/trace!"
7 ], function (declare, safe, Descriptor, Value, trace) {
8 var Context = declare(null, {
9
10 _cache: null,
11
12 _services: null,
13
14 _stack: null,
15
16 _visited: null,
17
18 container: null,
19
20 _trace: true,
21
22 constructor: function (container, services, cache, visited) {
23 safe.argumentNotNull(container, "container");
24 safe.argumentNotNull(services, "services");
25
26 this._visited = visited || {};
27 this._stack = [];
28 this._cache = cache || {};
29 this._services = services;
30 this.container = container;
31 },
32
33 getService: function (name, def) {
34 var d = this._services[name];
35
36 if (!d)
37 if (arguments.length > 1)
38 return def;
39 else
40 throw new Error("Service '" + name + "' not found");
41
42 return d.activate(this, name);
43 },
44
45 /**
46 * registers services local to the the activation context
47 *
48 * @name{string} the name of the service
49 * @service{string} the service descriptor to register
50 */
51 register: function (name, service) {
52 safe.argumentNotEmptyString(name, "name");
53
54 if (!(service instanceof Descriptor))
55 service = new Value(service, true);
56 this._services[name] = service;
57 },
58
59 clone: function () {
60 return new Context(
61 this.container,
62 Object.create(this._services),
63 this._cache,
64 this._visited
65 );
66
67 },
68
69 has: function (id) {
70 return id in this._cache;
71 },
72
73 get: function (id) {
74 return this._cache[id];
75 },
76
77 store: function (id, value) {
78 return (this._cache[id] = value);
79 },
80
81 parse: function (data, name) {
82 var me = this;
83 if (safe.isPrimitive(data))
84 return data;
85
86 if (data instanceof Descriptor) {
87 return data.activate(this, name);
88 } else if (data instanceof Array) {
89 me.enter(name);
90 var v = data.map(function (x, i) {
91 return me.parse(x, "." + i);
92 });
93 me.leave();
94 return v;
95 } else {
96 me.enter(name);
97 var result = {};
98 for (var p in data)
99 result[p] = me.parse(data[p], "." + p);
100 me.leave();
101 return result;
102 }
103 },
104
105 visit: function (id) {
106 var count = this._visited[id] || 0;
107 this._visited[id] = count + 1;
108 return count;
109 },
110
111 getStack: function () {
112 return this._stack.slice().reverse();
113 },
114
115 enter: function (name, d, localize) {
116 if (this._trace)
117 trace.log("enter " + name + " " + (d || "") +
118 (localize ? " localize" : ""));
119 this._stack.push({
120 name: name,
121 service: d,
122 scope: this._services
123 });
124 if (localize)
125 this._services = Object.create(this._services);
126 },
127
128 leave: function () {
129 var ctx = this._stack.pop();
130 this._services = ctx.scope;
131
132 if (this._trace)
133 trace.log("leave " + ctx.name + " " + (ctx.service || ""));
134 }
135 });
136
137 return Context;
138 });