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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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417
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16 type => 'r',
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17 activation => 'r',
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18 args => 'r',
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19 services => 'r',
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20 norequire => 'r',
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420
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21 owner => 'r',
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415
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22 _name => 'rw',
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23 _loaded => 'rw'
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24 ]
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25 };
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26
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27 sub CTOR {
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28 my ( $this, %opts ) = @_;
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29
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30 $this->type( $opts{type} )
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31 or die IMPL::InvalidArgumentException->new('type');
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420
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32 $this->owner( $opts{owner} )
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33 or die IMPL::InvalidArgumentException->new('owner');
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415
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34
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420
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35 $this->activation( SELF->ParseActivation( $opts{activation} ) );
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417
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36 $this->args( $opts{args} ) if exists $opts{args};
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37 $this->services( $opts{services} ) if exists $opts{services};
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38 $this->norequire( $opts{norequire} ) if exists $opts{norequire};
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415
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39
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40 $this->_name( 'new {'
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420
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41 . SELF->ActivationToString( $this->activation )
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415
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42 . '} '
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43 . $this->type );
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44 }
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45
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46 sub Activate {
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47 my ( $this, $context ) = @_;
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48
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416
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49 my $instance;
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417
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50 $context->EnterScope( $this->_name, $this->services );
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415
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51
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417
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52 my $activation = $this->activation;
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53 my $cache;
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415
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54
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420
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55 if ( $activation == SELF->ACTIVATE_SINGLETON ) {
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417
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56 $cache = $context->container->root->instances;
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57 }
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420
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58 elsif ( $activation == SELF->ACTIVATE_CONTAINER ) {
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59 $cache = $this->owner->instances;
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60 }
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61 elsif ( $activation == SELF->ACTIVATE_HIERARCHY ) {
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417
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62 $cache = $context->container->instances;
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63 }
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420
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64 elsif ( $activation == SELF->ACTIVATE_CONTEXT ) {
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417
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65 $cache = $context->instances;
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66 }
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415
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67
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417
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68 $instance = $cache->{ ref($this) } if $cache;
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69 unless ($instance) {
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70 $instance = $this->CreateInstance($context);
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71 }
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415
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72
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417
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73 $cache->{ ref($this) } = $instance if $cache;
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74
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75 $context->LeaveScope();
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415
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76
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77 return $instance;
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78 }
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79
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80 sub CreateInstance {
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81 my ( $this, $context ) = @_;
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82
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417
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83 my $class =
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84 $this->norequire
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85 ? $this->type
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86 : $context->container->Require( $this->type );
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415
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87
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88 my $args = $this->args ? $this->args->Activate($context) : undef;
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89
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90 if ( defined $args ) {
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91 if ( isarray($args) ) {
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92 return $class->new(@$args);
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93 }
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94 elsif ( ishash($args) ) {
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95 return $class->new(%$args);
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96 }
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97 else {
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98 return $class->new($args);
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99 }
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100 }
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101 else {
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102 return $class->new();
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103 }
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104 }
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105
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106 1;
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