aermicioi.aedi.container.prototype

1 /**
2 
3 License:
4 	Boost Software License - Version 1.0 - August 17th, 2003
5     
6     Permission is hereby granted, free of charge, to any person or organization
7     obtaining a copy of the software and accompanying documentation covered by
8     this license (the "Software") to use, reproduce, display, distribute,
9     execute, and transmit the Software, and to prepare derivative works of the
10     Software, and to permit third-parties to whom the Software is furnished to
11     do so, all subject to the following:
12     
13     The copyright notices in the Software and this entire statement, including
14     the above license grant, this restriction and the following disclaimer,
15     must be included in all copies of the Software, in whole or in part, and
16     all derivative works of the Software, unless such copies or derivative
17     works are solely in the form of machine-executable object code generated by
18     a source language processor.
19     
20     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22     FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23     SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24     FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25     ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26     DEALINGS IN THE SOFTWARE.
27 
28 Authors:
29 	Alexandru Ermicioi
30 **/
31 module aermicioi.aedi.container.prototype_container;
32 
33 import aermicioi.aedi.container.container;
34 import aermicioi.aedi.storage.object_storage;
35 import aermicioi.aedi.factory.factory;
36 import aermicioi.aedi.exception;
37 import aermicioi.aedi.container.factory;
38 
39 import std.range.interfaces;
40 import std.typecons;
41 
42 /**
43  Prototype container.
44  
45  Instantiates a new object using passed ObjectFactory implementation, on each request of it by some part of an application.
46 **/
47 class PrototypeContainer : ConfigurableContainer {
48     
49     private {
50         
51         ObjectStorage!(ObjectFactory, string) factories;
52     }
53     
54     public {
55         
56         this() {
57             this.factories = new ObjectStorage!(ObjectFactory, string);
58         }
59         
60         PrototypeContainer set(ObjectFactory object, string key) {
61             this.factories.set(new ExceptionChainingObjectFactory(new InProcessObjectFactoryDecorator(object), key), key);
62             
63             return this;
64         }
65         
66         PrototypeContainer remove(string key) {
67             this.factories.remove(key);
68             
69             return this;
70         }
71         
72         Object get(string key) {
73             if (this.factories.has(key)) {
74                 
75                 return this.factories.get(key).factory();
76             }
77             
78             throw new NotFoundException("Object by id " ~ key ~ " not found");
79         }
80         
81         bool has(in string key) inout {
82             return this.factories.has(key);
83         }
84         
85         PrototypeContainer instantiate() {
86             
87             return this;
88         }
89         
90         PrototypeContainer link(string key, string alias_) {
91             this.factories.link(key, alias_);
92             
93             return this;
94         }
95         
96         PrototypeContainer unlink(string alias_) {
97             this.factories.unlink(alias_);
98             
99             return this;
100         }
101         
102         const(string) resolve(in string key) const {
103             return this.factories.resolve(key);
104         }
105         
106         ObjectFactory getFactory(string identity) {
107             return this.factories.get(identity);
108         }
109         
110         InputRange!(Tuple!(ObjectFactory, string)) getFactories() {
111             import std.algorithm;
112             
113             return this.factories.contents.byKeyValue.map!(
114                 a => tuple(a.value, a.key)
115             ).inputRangeObject;
116         }
117     }
118 }