--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/implab/di/ReferenceDescriptor.js	Thu Jun 01 13:20:03 2017 +0300
@@ -0,0 +1,90 @@
+define([
+    "dojo/_base/declare", "../safe", "./Descriptor", "./ActivationError", "./ValueDescriptor"
+],
+
+function(declare, safe, Descriptor, ActivationError, Value) {
+    return declare(Descriptor, {
+        _name : null,
+        _lazy : false,
+        _optional : false,
+        _default : undefined,
+
+        constructor : function(name, lazy, optional, def, services) {
+            safe.argumentNotEmptyString(name, "name");
+            this._name = name;
+            this._lazy = Boolean(lazy);
+            this._optional = Boolean(optional);
+            this._default = def;
+            this._services = services;
+        },
+
+        activate : function(context, name) {
+            var me = this;
+
+            context.enter(name, this, true);
+
+            // добавляем сервисы
+            if (me._services) {
+                for ( var p in me._services) {
+                    var sv = me._services[p];
+                    context.register(p, sv instanceof Descriptor ? sv : new Value(sv, false));
+                }
+            }
+
+            if (me._lazy) {
+                // сохраняем контекст активации
+                context = context.clone();
+                return function(cfg) {
+                    // защищаем контекст на случай исключения в процессе
+                    // активации
+                    var ct = context.clone();
+                    try {
+                        if (cfg)
+                            safe.each(cfg, function(v, k) {
+                                ct.register(k, v instanceof Descriptor ? v : new Value(v, false));
+                            });
+                        return me._optional ? ct.getService(me._name, me._default) : ct
+                            .getService(me._name);
+                    } catch (error) {
+                        throw new ActivationError(me._name, ct.getStack(), error);
+                    }
+                };
+            }
+
+            var v = me._optional ? context.getService(me._name, me._default) : context
+                .getService(me._name);
+            context.leave(me);
+            return v;
+        },
+
+        isInstanceCreated : function() {
+            return false;
+        },
+
+        toString : function() {
+            var opts = [];
+            if (this._optional)
+                opts.push("optional");
+            if (this._lazy)
+                opts.push("lazy");
+
+            var parts = [
+                "@ref "
+            ];
+            if (opts.length) {
+                parts.push("{");
+                parts.push(opts.join());
+                parts.push("} ");
+            }
+
+            parts.push(this._name);
+
+            if (!safe.isNull(this._default)) {
+                parts.push(" = ");
+                parts.push(this._default);
+            }
+
+            return parts.join("");
+        }
+    });
+});
\ No newline at end of file