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415
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1 package IMPL::Config::ServiceDescriptor;
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2 use strict;
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3
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4 use IMPL::lang qw(:base);
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5 use IMPL::Exception();
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6 use IMPL::declare {
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7 require => {
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416
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8 Bag => 'IMPL::Config::Bag',
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9 ActivationException => 'IMPL::Config::ActivationException'
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415
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10 },
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11 base => [
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12 'IMPL::Object' => undef,
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13 'IMPL::Config::Descriptor' => undef
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14 ],
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15 props => [
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16 type => 'ro',
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17 activation => 'ro',
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18 args => 'ro',
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19 services => 'ro',
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20 _name => 'rw',
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21 _loaded => 'rw'
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22 ]
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23 };
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24
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25 sub CTOR {
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26 my ( $this, %opts ) = @_;
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27
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28 $this->type( $opts{type} )
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29 or die IMPL::InvalidArgumentException->new('type');
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30
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31 $this->activation(
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32 IMPL::Config::Descriptor::ParseActivation( $opts{activation} ) );
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33 $this->args( $opts{args} ) if exists $opts{args};
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34 $this->services( $opts{services} ) if exists $opts{services};
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35
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36 $this->_name( 'new {'
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37 . IMPL::Config::Descriptor::ActivationToString( $this->activation )
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38 . '} '
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39 . $this->type );
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40 }
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41
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42 sub Activate {
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43 my ( $this, $context ) = @_;
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44
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416
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45 my $instance;
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46 $context->GuardScope(
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47 $this->_name,
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48 $this->services,
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49 sub {
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415
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50
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416
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51 my $activation = $this->activation;
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52 my $cache;
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415
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53
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416
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54 if ( $activation == IMPL::Config::Descriptor::ACTIVATE_SINGLETON ) {
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55 $cache = $context->container->root->instances;
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56 }
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57 elsif (
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58 $activation == IMPL::Config::Descriptor::ACTIVATE_CONTAINER )
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59 {
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60 $cache = $context->container->instances;
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61 }
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62 elsif ( $activation == IMPL::Config::Descriptor::ACTIVATE_CONTEXT )
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63 {
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64 $cache = $context->instances;
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65 }
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415
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66
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416
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67 $instance = $cache->{ ref($this) } if $cache;
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68 unless ($instance) {
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69 $instance = $this->CreateInstance($context);
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70 }
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415
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71
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416
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72 $cache->{ ref($this) } = $instance if $cache;
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73 }
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74 );
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415
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75
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76 return $instance;
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77 }
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78
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79 sub CreateInstance {
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80 my ( $this, $context ) = @_;
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81
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82 my $class = $context > container->Require( $this->type );
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83
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84 my $args = $this->args ? $this->args->Activate($context) : undef;
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85
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86 if ( defined $args ) {
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87 if ( isarray($args) ) {
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88 return $class->new(@$args);
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89 }
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90 elsif ( ishash($args) ) {
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91 return $class->new(%$args);
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92 }
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93 else {
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94 return $class->new($args);
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95 }
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96 }
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97 else {
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98 return $class->new();
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99 }
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100 }
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101
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102 1;
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