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1 | package Text::Tradition::HasStemma; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use Moose::Role; |
6 | use Text::Tradition::Stemma; |
7 | |
8 | =head1 NAME |
9 | |
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10 | Text::Tradition::HasStemma - add-on to associate stemma hypotheses to |
11 | Text::Tradition objects |
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12 | |
13 | =head1 DESCRIPTION |
14 | |
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15 | It is often the case that, for a given text tradition, the order of copying |
16 | of the witnesses can or should be reconstructed (or at least the attempt |
17 | should be made.) This class is a role that can be applied to |
18 | Text::Tradition objects to record stemma hypotheses. See the documentation |
19 | for L<Text::Tradition::Stemma> for more information. |
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20 | |
21 | =head1 METHODS |
22 | |
23 | =head2 stemmata |
24 | |
25 | Return a list of all stemmata associated with the tradition. |
26 | |
27 | =head2 stemma_count |
28 | |
29 | Return the number of stemma hypotheses defined for this tradition. |
30 | |
31 | =head2 stemma( $idx ) |
32 | |
33 | Return the L<Text::Tradition::Stemma> object identified by the given index. |
34 | |
35 | =head2 clear_stemmata |
36 | |
37 | Delete all stemma hypotheses associated with this tradition. |
38 | |
39 | =cut |
40 | |
41 | has 'stemmata' => ( |
42 | traits => ['Array'], |
43 | isa => 'ArrayRef[Text::Tradition::Stemma]', |
44 | handles => { |
45 | stemmata => 'elements', |
46 | _add_stemma => 'push', |
47 | stemma => 'get', |
48 | stemma_count => 'count', |
49 | clear_stemmata => 'clear', |
50 | }, |
51 | default => sub { [] }, |
52 | ); |
53 | |
54 | |
55 | =head2 add_stemma( $dotfile ) |
56 | |
57 | Initializes a Text::Tradition::Stemma object from the given dotfile, |
58 | and associates it with the tradition. |
59 | |
60 | =begin testing |
61 | |
62 | use Text::Tradition; |
63 | |
64 | my $t = Text::Tradition->new( |
65 | 'name' => 'simple test', |
66 | 'input' => 'Tabular', |
67 | 'file' => 't/data/simple.txt', |
68 | ); |
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69 | is( $t->stemma_count, 0, "No stemmas added yet" ); |
70 | my $s; |
71 | ok( $s = $t->add_stemma( dotfile => 't/data/simple.dot' ), "Added a simple stemma" ); |
72 | is( ref( $s ), 'Text::Tradition::Stemma', "Got a stemma object returned" ); |
73 | is( $t->stemma_count, 1, "Tradition claims to have a stemma" ); |
74 | is( $t->stemma(0), $s, "Tradition hands back the right stemma" ); |
75 | |
76 | =end testing |
77 | |
78 | =cut |
79 | |
80 | sub add_stemma { |
81 | my $self = shift; |
82 | my %opts = @_; |
83 | my $stemma_fh; |
84 | if( $opts{'dotfile'} ) { |
85 | open $stemma_fh, '<', $opts{'dotfile'} |
86 | or warn "Could not open file " . $opts{'dotfile'}; |
87 | } elsif( $opts{'dot'} ) { |
88 | my $str = $opts{'dot'}; |
89 | open $stemma_fh, '<', \$str; |
90 | } |
91 | # Assume utf-8 |
92 | binmode $stemma_fh, ':utf8'; |
93 | my $stemma = Text::Tradition::Stemma->new( |
94 | 'dot' => $stemma_fh ); |
95 | $self->_add_stemma( $stemma ) if $stemma; |
96 | return $stemma; |
97 | } |
98 | |
99 | 1; |
100 | |
101 | =head1 LICENSE |
102 | |
103 | This package is free software and is provided "as is" without express |
104 | or implied warranty. You can redistribute it and/or modify it under |
105 | the same terms as Perl itself. |
106 | |
107 | =head1 AUTHOR |
108 | |
109 | Tara L Andrews E<lt>aurum@cpan.orgE<gt> |