aermicioi.aedi.exception.circular_reference

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.exception.circular_reference_exception;
32 
33 import aermicioi.aedi.exception.di_exception;
34 import aermicioi.aedi.util.range : BufferSink;
35 
36 /**
37 Exception denoting a circular dependency in DI container.
38 
39 Exception denoting a circular dependency in DI container.
40 It is thrown when a DI gets an InProgressException, or it detected a circular dependency in other way.
41 **/
42 @safe class CircularReferenceException : AediException {
43     /**
44     The circular dependency chain found in container.
45     **/
46     string[] chain;
47 
48     public {
49         /**
50         * Creates a new instance of Exception. The nextInChain parameter is used
51         * internally and should always be $(D null) when passed by user code.
52         * This constructor does not automatically throw the newly-created
53         * Exception; the $(D throw) statement should be used for that purpose.
54         */
55         nothrow this(string msg, string identity, string file = __FILE__, size_t line = __LINE__, Throwable next = null)
56         {
57             super(msg, identity, file, line, next);
58         }
59 
60         /**
61         ditto
62         **/
63         nothrow this(string msg, string identity, Throwable next, string file = __FILE__, size_t line = __LINE__)
64         {
65             super(msg, identity, file, line, next);
66         }
67 
68         override void pushMessage(scope void delegate(in char[]) sink) const @system {
69             import std.algorithm : joiner, substitute;
70             import std.array : array;
71             import std.utf : byChar;
72 
73             string[] chain = this.chain.dup;
74             auto substituted = this.msg.substitute("${chain}", chain.joiner(" -> ").byChar.array.idup, "${identity}", identity).byChar;
75 
76             while (!substituted.empty) {
77                 auto buffer = BufferSink!(char[256])();
78                 buffer.put(substituted);
79 
80                 sink(buffer.slice);
81             }
82         }
83     }
84 }