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