Mercurial > pub > Impl
annotate Lib/IMPL/Config/Activator.pm @ 360:39842eedd923
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| author | sergey |
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| date | Tue, 26 Nov 2013 03:22:44 +0400 |
| parents | 8088779e539d |
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1 package IMPL::Config::Activator; |
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2 use strict; |
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3 |
| 293 | 4 use Scalar::Util qw(reftype); |
| 5 use IMPL::lang; | |
| 6 use IMPL::Const qw(:prop); | |
| 7 use IMPL::declare { | |
| 294 | 8 require => { |
| 293 | 9 Loader => 'IMPL::Code::Loader', |
| 10 Exception => 'IMPL::Exception' | |
| 294 | 11 }, |
| 293 | 12 base => [ |
| 13 'IMPL::Object' => undef, | |
| 14 'IMPL::Object::Autofill' => '@_', | |
| 15 'IMPL::Object::PublicSerializable' => undef | |
| 16 ], | |
| 17 props => [ | |
| 18 factory => PROP_RW, | |
| 19 parameters => PROP_RW, | |
| 294 | 20 singleCall => PROP_RW, |
| 21 _object => PROP_RW | |
| 293 | 22 ] |
| 23 }; | |
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24 |
| 293 | 25 use constant { |
| 294 | 26 SELF_CLASS => __PACKAGE__, |
| 293 | 27 }; |
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28 |
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29 sub CTOR { |
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30 my $this = shift; |
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31 |
| 293 | 32 die Exception->new("A factory parameter is required") unless $this->factory; |
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33 |
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34 } |
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35 |
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36 |
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37 sub activate { |
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38 my $this = shift; |
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39 |
| 294 | 40 unless ($this->_object) { |
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41 my @args; |
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42 |
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43 my $params = $this->parameters; |
| 294 | 44 if (ref $params eq 'HASH') { |
| 194 | 45 while ( my ($key,$value) = each %$params ) { |
| 293 | 46 push @args,$key, is($value,SELF_CLASS) ? $value->activate : $value; |
| 194 | 47 } |
| 294 | 48 } elsif (ref $params eq 'ARRAY') { |
| 293 | 49 push @args, map is($_,SELF_CLASS) ? $_->activate : $_, @$params; |
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50 } else { |
| 293 | 51 push @args, is($params,SELF_CLASS) ? $params->activate : $params; |
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52 } |
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53 |
| 293 | 54 push @args, map is($_,SELF_CLASS) ? $_->activate : $_, @_ if @_; |
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55 |
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56 my $factory = $this->factory; |
| 294 | 57 Loader->default->Require($factory) |
| 58 unless ref($factory); | |
| 59 | |
| 60 my $instance = $factory->new(@args); | |
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61 |
| 294 | 62 $this->_object($instance) |
| 63 unless $this->singleCall; | |
| 64 | |
| 65 return $instance; | |
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66 } else { |
| 294 | 67 return $this->_object; |
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68 } |
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69 } |
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70 |
| 180 | 71 1; |
| 293 | 72 |
| 73 __END__ | |
| 74 | |
| 75 =pod | |
| 76 | |
| 77 =head1 NAME | |
| 78 | |
| 294 | 79 C<IMPL::Config::Activator> - объект, используемый для получения других объектов. |
| 80 | |
| 81 =head1 DESCRIPTION | |
| 82 | |
| 83 Служит дополнительным уровнем абстракции в тех случаях, когда нужный объект | |
| 84 заранее не известен или его создание должно происходить по требованию. | |
| 85 От обычной фабрики отличается также тем, что рассматривает формальные параметры | |
| 86 на наличие активаторов и выполняет их при активации. | |
| 87 | |
| 88 Кроме того можно указать, что процесс активации должен происходить при каждом | |
| 89 обращении. | |
| 293 | 90 |
| 91 =cut |