Mercurial > pub > Impl
annotate Lib/IMPL/Object/Singleton.pm @ 245:7c517134c42f
Added Unsupported media type Web exception
corrected resourceLocation setting in the resource
Implemented localizable resources for text messages
fixed TT view scopings, INIT block in controls now sets globals correctly.
author | sergey |
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date | Mon, 29 Oct 2012 03:15:22 +0400 |
parents | 4d0e1962161c |
children | 0f59b2de72af |
rev | line source |
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49 | 1 package IMPL::Object::Singleton; |
2 use strict; | |
3 use warnings; | |
4 | |
5 my %instances; | |
6 | |
143 | 7 sub CTOR { |
194 | 8 die new IMPL::InvalidOperationException("Only one instance of the singleton can be created",ref $_[0], $instances{ref $_[0]}) if $instances{ref $_[0]}; |
9 $instances{ref $_[0]} = $_[0]; | |
143 | 10 } |
11 | |
49 | 12 sub instance { |
144
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13 $instances{$_[0]} |
49 | 14 } |
15 | |
16 1; | |
17 | |
18 __END__ | |
19 | |
20 =pod | |
21 | |
22 =head1 SYNOPSIS | |
23 | |
88 | 24 =begin code |
25 | |
49 | 26 package Foo; |
27 | |
166 | 28 use parent qw(IMPL::Object IMPL::Object::Singleton); |
49 | 29 |
30 #.... | |
31 | |
32 Foo->isnatnce->some_work(); | |
33 | |
34 Foo->isnatnce->get_result(); | |
35 | |
88 | 36 =end code |
37 | |
49 | 38 =head1 DESCRIPTION |
39 | |
180 | 40 Реализует шаблон Singleton |
49 | 41 |
42 =head1 MEMBERS | |
43 | |
44 =head2 OPERATORS | |
45 | |
46 =list | |
47 | |
48 =item C<instance CLASS(@params)> | |
49 | |
180 | 50 Создает или возвращает экземпляр класса, если экземляр не существует, то он создается с параметрами C<@params>. |
49 | 51 |
52 =over | |
53 | |
54 =cut |