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1 | package TAP::Base; |
2 | |
3 | use strict; |
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4 | use vars qw($VERSION @ISA); |
5 | |
6 | use TAP::Object; |
7 | |
8 | @ISA = qw(TAP::Object); |
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9 | |
10 | =head1 NAME |
11 | |
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12 | TAP::Base - Base class that provides common functionality to L<TAP::Parser> |
13 | and L<TAP::Harness> |
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14 | |
15 | =head1 VERSION |
16 | |
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17 | Version 3.17 |
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18 | |
19 | =cut |
20 | |
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21 | $VERSION = '3.17'; |
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22 | |
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23 | use constant GOT_TIME_HIRES => do { |
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24 | eval 'use Time::HiRes qw(time);'; |
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25 | $@ ? 0 : 1; |
26 | }; |
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27 | |
28 | =head1 SYNOPSIS |
29 | |
30 | package TAP::Whatever; |
31 | |
32 | use TAP::Base; |
33 | |
34 | use vars qw($VERSION @ISA); |
35 | @ISA = qw(TAP::Base); |
36 | |
37 | # ... later ... |
38 | |
39 | my $thing = TAP::Whatever->new(); |
40 | |
41 | $thing->callback( event => sub { |
42 | # do something interesting |
43 | } ); |
44 | |
45 | =head1 DESCRIPTION |
46 | |
47 | C<TAP::Base> provides callback management. |
48 | |
49 | =head1 METHODS |
50 | |
51 | =head2 Class Methods |
52 | |
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53 | =cut |
54 | |
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55 | sub _initialize { |
56 | my ( $self, $arg_for, $ok_callback ) = @_; |
57 | |
58 | my %ok_map = map { $_ => 1 } @$ok_callback; |
59 | |
60 | $self->{ok_callbacks} = \%ok_map; |
61 | |
62 | if ( my $cb = delete $arg_for->{callbacks} ) { |
63 | while ( my ( $event, $callback ) = each %$cb ) { |
64 | $self->callback( $event, $callback ); |
65 | } |
66 | } |
67 | |
68 | return $self; |
69 | } |
70 | |
71 | =head3 C<callback> |
72 | |
73 | Install a callback for a named event. |
74 | |
75 | =cut |
76 | |
77 | sub callback { |
78 | my ( $self, $event, $callback ) = @_; |
79 | |
80 | my %ok_map = %{ $self->{ok_callbacks} }; |
81 | |
82 | $self->_croak('No callbacks may be installed') |
83 | unless %ok_map; |
84 | |
85 | $self->_croak( "Callback $event is not supported. Valid callbacks are " |
86 | . join( ', ', sort keys %ok_map ) ) |
87 | unless exists $ok_map{$event}; |
88 | |
89 | push @{ $self->{code_for}{$event} }, $callback; |
90 | |
91 | return; |
92 | } |
93 | |
94 | sub _has_callbacks { |
95 | my $self = shift; |
96 | return keys %{ $self->{code_for} } != 0; |
97 | } |
98 | |
99 | sub _callback_for { |
100 | my ( $self, $event ) = @_; |
101 | return $self->{code_for}{$event}; |
102 | } |
103 | |
104 | sub _make_callback { |
105 | my $self = shift; |
106 | my $event = shift; |
107 | |
108 | my $cb = $self->_callback_for($event); |
109 | return unless defined $cb; |
110 | return map { $_->(@_) } @$cb; |
111 | } |
112 | |
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113 | =head3 C<get_time> |
114 | |
115 | Return the current time using Time::HiRes if available. |
116 | |
117 | =cut |
118 | |
119 | sub get_time { return time() } |
120 | |
121 | =head3 C<time_is_hires> |
122 | |
123 | Return true if the time returned by get_time is high resolution (i.e. if Time::HiRes is available). |
124 | |
125 | =cut |
126 | |
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127 | sub time_is_hires { return GOT_TIME_HIRES } |
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128 | |
129 | 1; |