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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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421
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7 require => {
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8 Bag => 'IMPL::Config::Bag',
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9 ActivationException => 'IMPL::Config::ActivationException'
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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 => '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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21 owner => 'r',
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22 _name => 'rw',
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23 _loaded => 'rw'
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24 ]
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415
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25 };
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26
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27 sub CTOR {
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421
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28 my ( $this, %opts ) = @_;
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415
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29
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421
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30 $this->type( $opts{type} )
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31 or die IMPL::InvalidArgumentException->new('type');
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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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421
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35 $this->activation( SELF->ParseActivation( $opts{activation} ) );
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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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421
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40 $this->_name( 'new {'
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41 . SELF->ActivationToString( $this->activation ) . '} '
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42 . $this->type );
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415
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43 }
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44
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45 sub Activate {
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421
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46 my ( $this, $context ) = @_;
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415
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47
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421
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48 my $instance;
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49 $context->EnterScope( $this->_name, $this->services );
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415
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50
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421
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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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421
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54 if ( $activation == SELF->ACTIVATE_SINGLETON ) {
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55 $cache = $context->container->root->instances;
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56 }
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57 elsif ( $activation == SELF->ACTIVATE_CONTAINER ) {
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58 $cache = $this->owner->instances;
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59 }
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60 elsif ( $activation == SELF->ACTIVATE_HIERARCHY ) {
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61 $cache = $context->container->instances;
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62 }
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63 elsif ( $activation == SELF->ACTIVATE_CONTEXT ) {
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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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421
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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 $cache->{ ref($this) } = $instance if $cache;
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71 }
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415
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72
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421
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73 $context->LeaveScope();
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417
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74
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421
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75 return $instance;
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415
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76 }
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77
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78 sub CreateInstance {
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421
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79 my ( $this, $context ) = @_;
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415
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80
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421
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81 my $class =
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82 $this->norequire
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83 ? $this->type
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84 : $context->container->Require( $this->type );
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415
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85
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421
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86 my $args = $this->args ? $this->args->Activate($context) : undef;
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415
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87
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421
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88 if ( defined $args ) {
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89 if ( isarray($args) ) {
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90 return $class->new(@$args);
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91 }
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92 elsif ( ishash($args) ) {
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93 return $class->new(%$args);
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94 }
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95 else {
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96 return $class->new($args);
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97 }
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98 }
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99 else {
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100 return $class->new();
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101 }
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415
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102 }
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103
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104 1;
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