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1 | package Text::Tradition::Collation::Reading; |
2 | |
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3 | use Moose; |
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4 | use Moose::Util::TypeConstraints; |
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5 | use JSON qw/ from_json /; |
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6 | use Module::Load; |
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7 | use Text::Tradition::Error; |
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8 | use XML::Easy::Syntax qw( $xml10_name_rx $xml10_namestartchar_rx ); |
7cd9f181 |
9 | use YAML::XS; |
e4b0f464 |
10 | use overload '""' => \&_stringify, 'fallback' => 1; |
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11 | |
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12 | subtype 'ReadingID', |
13 | as 'Str', |
14 | where { $_ =~ /\A$xml10_name_rx\z/ }, |
15 | message { 'Reading ID must be a valid XML attribute string' }; |
16 | |
17 | no Moose::Util::TypeConstraints; |
18 | |
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19 | =head1 NAME |
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20 | |
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21 | Text::Tradition::Collation::Reading - represents a reading (usually a word) |
22 | in a collation. |
23 | |
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24 | =head1 DESCRIPTION |
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25 | |
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26 | Text::Tradition is a library for representation and analysis of collated |
27 | texts, particularly medieval ones. A 'reading' refers to a unit of text, |
28 | usually a word, that appears in one or more witnesses (manuscripts) of the |
29 | tradition; the text of a given witness is composed of a set of readings in |
30 | a particular sequence |
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31 | |
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32 | =head1 METHODS |
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33 | |
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34 | =head2 new |
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35 | |
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36 | Creates a new reading in the given collation with the given attributes. |
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37 | Options include: |
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38 | |
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39 | =over 4 |
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40 | |
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41 | =item collation - The Text::Tradition::Collation object to which this |
42 | reading belongs. Required. |
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43 | |
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44 | =item id - A unique identifier for this reading. Required. |
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45 | |
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46 | =item text - The word or other text of the reading. |
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47 | |
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48 | =item is_start - The reading is the starting point for the collation. |
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49 | |
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50 | =item is_end - The reading is the ending point for the collation. |
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51 | |
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52 | =item is_lacuna - The 'reading' represents a known gap in the text. |
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53 | |
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54 | =item is_ph - A temporary placeholder for apparatus parsing purposes. Do |
55 | not use unless you know what you are doing. |
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56 | |
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57 | =item rank - The sequence number of the reading. This should probably not |
58 | be set manually. |
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59 | |
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60 | =back |
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61 | |
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62 | One of 'text', 'is_start', 'is_end', or 'is_lacuna' is required. |
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63 | |
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64 | =head2 collation |
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65 | |
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66 | =head2 id |
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67 | |
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68 | =head2 text |
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69 | |
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70 | =head2 is_start |
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71 | |
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72 | =head2 is_end |
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73 | |
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74 | =head2 is_lacuna |
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75 | |
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76 | =head2 rank |
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77 | |
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78 | Accessor methods for the given attributes. |
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79 | |
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80 | =cut |
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81 | |
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82 | has 'collation' => ( |
83 | is => 'ro', |
84 | isa => 'Text::Tradition::Collation', |
85 | # required => 1, |
86 | weak_ref => 1, |
87 | ); |
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88 | |
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89 | has 'id' => ( |
90 | is => 'ro', |
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91 | isa => 'ReadingID', |
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92 | required => 1, |
93 | ); |
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94 | |
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95 | has 'text' => ( |
96 | is => 'ro', |
97 | isa => 'Str', |
98 | required => 1, |
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99 | writer => 'alter_text', |
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100 | ); |
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101 | |
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102 | has 'language' => ( |
103 | is => 'ro', |
104 | isa => 'Str', |
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105 | predicate => 'has_language', |
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106 | ); |
107 | |
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108 | has 'is_start' => ( |
109 | is => 'ro', |
110 | isa => 'Bool', |
111 | default => undef, |
112 | ); |
113 | |
114 | has 'is_end' => ( |
115 | is => 'ro', |
116 | isa => 'Bool', |
117 | default => undef, |
118 | ); |
119 | |
120 | has 'is_lacuna' => ( |
121 | is => 'ro', |
122 | isa => 'Bool', |
123 | default => undef, |
124 | ); |
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125 | |
126 | has 'is_ph' => ( |
127 | is => 'ro', |
128 | isa => 'Bool', |
129 | default => undef, |
130 | ); |
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131 | |
132 | has 'is_common' => ( |
133 | is => 'rw', |
134 | isa => 'Bool', |
135 | default => undef, |
136 | ); |
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137 | |
138 | has 'rank' => ( |
139 | is => 'rw', |
140 | isa => 'Int', |
141 | predicate => 'has_rank', |
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142 | clearer => 'clear_rank', |
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143 | ); |
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144 | |
145 | ## For morphological analysis |
146 | |
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147 | has 'grammar_invalid' => ( |
148 | is => 'rw', |
149 | isa => 'Bool', |
150 | default => undef, |
151 | ); |
152 | |
153 | has 'is_nonsense' => ( |
154 | is => 'rw', |
155 | isa => 'Bool', |
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156 | default => undef, |
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157 | ); |
158 | |
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159 | has 'normal_form' => ( |
160 | is => 'rw', |
161 | isa => 'Str', |
162 | predicate => 'has_normal_form', |
163 | ); |
164 | |
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165 | # Holds the lexemes for the reading. |
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166 | has 'reading_lexemes' => ( |
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167 | traits => ['Array'], |
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168 | isa => 'ArrayRef[Text::Tradition::Collation::Reading::Lexeme]', |
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169 | handles => { |
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170 | lexeme => 'get', |
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171 | lexemes => 'elements', |
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172 | has_lexemes => 'count', |
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173 | clear_lexemes => 'clear', |
174 | add_lexeme => 'push', |
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175 | }, |
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176 | default => sub { [] }, |
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177 | ); |
178 | |
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179 | ## For prefix/suffix readings |
180 | |
181 | has 'join_prior' => ( |
182 | is => 'ro', |
183 | isa => 'Bool', |
184 | default => undef, |
185 | ); |
186 | |
187 | has 'join_next' => ( |
188 | is => 'ro', |
189 | isa => 'Bool', |
190 | default => undef, |
191 | ); |
192 | |
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193 | |
194 | around BUILDARGS => sub { |
195 | my $orig = shift; |
196 | my $class = shift; |
197 | my $args; |
198 | if( @_ == 1 ) { |
199 | $args = shift; |
200 | } else { |
201 | $args = { @_ }; |
202 | } |
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203 | |
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204 | # If one of our special booleans is set, we change the text and the |
205 | # ID to match. |
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206 | if( exists $args->{'is_lacuna'} && !exists $args->{'text'} ) { |
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207 | $args->{'text'} = '#LACUNA#'; |
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208 | } elsif( exists $args->{'is_start'} ) { |
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209 | $args->{'id'} = '__START__'; # Change the ID to ensure we have only one |
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210 | $args->{'text'} = '#START#'; |
211 | $args->{'rank'} = 0; |
212 | } elsif( exists $args->{'is_end'} ) { |
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213 | $args->{'id'} = '__END__'; # Change the ID to ensure we have only one |
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214 | $args->{'text'} = '#END#'; |
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215 | } elsif( exists $args->{'is_ph'} ) { |
216 | $args->{'text'} = $args->{'id'}; |
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217 | } |
218 | |
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219 | # Backwards compatibility for non-XMLname IDs |
220 | my $rid = $args->{'id'}; |
221 | $rid =~ s/\#/__/g; |
222 | $rid =~ s/[\/,]/./g; |
223 | if( $rid !~ /^$xml10_namestartchar_rx/ ) { |
224 | $rid = 'r'.$rid; |
225 | } |
226 | $args->{'id'} = $rid; |
227 | |
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228 | $class->$orig( $args ); |
229 | }; |
230 | |
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231 | # Look for a lexeme-string argument in the build args. |
232 | sub BUILD { |
233 | my( $self, $args ) = @_; |
234 | if( exists $args->{'lexemes'} ) { |
235 | $self->_deserialize_lexemes( $args->{'lexemes'} ); |
236 | } |
237 | } |
238 | |
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239 | =head2 is_meta |
240 | |
241 | A meta attribute (ha ha), which should be true if any of our 'special' |
242 | booleans are true. Implies that the reading does not represent a bit |
243 | of text found in a witness. |
244 | |
245 | =cut |
246 | |
247 | sub is_meta { |
248 | my $self = shift; |
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249 | return $self->is_start || $self->is_end || $self->is_lacuna || $self->is_ph; |
3a2ebbf4 |
250 | } |
251 | |
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252 | =head2 is_nonrel |
253 | |
254 | Similar to is_meta, but returns false for the start and end readings. |
255 | |
256 | =cut |
257 | |
258 | sub is_nonrel { |
259 | my $self = shift; |
260 | return $self->is_lacuna || $self->is_ph; |
261 | } |
262 | |
027d819c |
263 | =head1 Convenience methods |
264 | |
265 | =head2 related_readings |
266 | |
267 | Calls Collation's related_readings with $self as the first argument. |
268 | |
269 | =cut |
270 | |
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271 | sub related_readings { |
272 | my $self = shift; |
273 | return $self->collation->related_readings( $self, @_ ); |
274 | } |
275 | |
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276 | =head2 witnesses |
277 | |
278 | Calls Collation's reading_witnesses with $self as the first argument. |
279 | |
280 | =cut |
281 | |
282 | sub witnesses { |
283 | my $self = shift; |
284 | return $self->collation->reading_witnesses( $self, @_ ); |
285 | } |
286 | |
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287 | =head2 predecessors |
288 | |
289 | Returns a list of Reading objects that immediately precede $self in the collation. |
290 | |
291 | =cut |
292 | |
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293 | sub predecessors { |
294 | my $self = shift; |
295 | my @pred = $self->collation->sequence->predecessors( $self->id ); |
296 | return map { $self->collation->reading( $_ ) } @pred; |
297 | } |
298 | |
027d819c |
299 | =head2 successors |
300 | |
301 | Returns a list of Reading objects that immediately follow $self in the collation. |
302 | |
303 | =cut |
304 | |
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305 | sub successors { |
306 | my $self = shift; |
307 | my @succ = $self->collation->sequence->successors( $self->id ); |
308 | return map { $self->collation->reading( $_ ) } @succ; |
309 | } |
310 | |
027d819c |
311 | =head2 set_identical( $other_reading) |
312 | |
313 | Backwards compatibility method, to add a transposition relationship |
314 | between $self and $other_reading. Don't use this. |
315 | |
316 | =cut |
317 | |
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318 | sub set_identical { |
319 | my( $self, $other ) = @_; |
320 | return $self->collation->add_relationship( $self, $other, |
321 | { 'type' => 'transposition' } ); |
322 | } |
323 | |
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324 | sub _stringify { |
325 | my $self = shift; |
326 | return $self->id; |
327 | } |
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328 | |
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329 | =head1 MORPHOLOGY |
330 | |
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331 | Methods for the morphological information (if any) attached to readings. |
332 | A reading may be made up of multiple lexemes; the concatenated lexeme |
333 | strings ought to match the reading's normalized form. |
334 | |
335 | See L<Text::Tradition::Collation::Reading::Lexeme> for more information |
336 | on Lexeme objects and their attributes. |
337 | |
338 | =head2 has_lexemes |
339 | |
340 | Returns a true value if the reading has any attached lexemes. |
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341 | |
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342 | =head2 lexemes |
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343 | |
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344 | Returns the Lexeme objects (if any) attached to the reading. |
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345 | |
346 | =head2 clear_lexemes |
347 | |
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348 | Wipes any associated Lexeme objects out of the reading. |
349 | |
350 | =head2 add_lexeme( $lexobj ) |
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351 | |
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352 | Adds the Lexeme in $lexobj to the list of lexemes. |
353 | |
354 | =head2 lemmatize |
355 | |
356 | If the language of the reading is set, this method will use the appropriate |
357 | Language model to determine the lexemes that belong to this reading. See |
358 | L<Text::Tradition::lemmatize> if you wish to lemmatize an entire tradition. |
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359 | |
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360 | =cut |
361 | |
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362 | sub lemmatize { |
363 | my $self = shift; |
364 | unless( $self->has_language ) { |
365 | warn "Please set a language to lemmatize a tradition"; |
366 | return; |
367 | } |
368 | my $mod = "Text::Tradition::Language::" . $self->language; |
369 | load( $mod ); |
370 | $mod->can( 'reading_lookup' )->( $self ); |
371 | |
372 | } |
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373 | |
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374 | # For graph serialization. Return a JSON representation of the associated |
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375 | # reading lexemes. |
376 | sub _serialize_lexemes { |
377 | my $self = shift; |
7604424b |
378 | my $json = JSON->new->allow_blessed(1)->convert_blessed(1); |
379 | return $json->encode( [ $self->lexemes ] ); |
7cd9f181 |
380 | } |
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381 | |
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382 | # Given a JSON representation of the lexemes, instantiate them and add |
383 | # them to the reading. |
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384 | sub _deserialize_lexemes { |
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385 | my( $self, $json ) = @_; |
386 | my $data = from_json( $json ); |
387 | return unless @$data; |
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388 | |
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389 | # Need to have the lexeme module in order to have lexemes. |
390 | eval { use Text::Tradition::Collation::Reading::Lexeme; }; |
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391 | throw( $@ ) if $@; |
392 | |
393 | # Good to go - add the lexemes. |
394 | my @lexemes; |
7604424b |
395 | foreach my $lexhash ( @$data ) { |
396 | push( @lexemes, Text::Tradition::Collation::Reading::Lexeme->new( |
397 | 'JSON' => $lexhash ) ); |
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398 | } |
399 | $self->clear_lexemes; |
400 | $self->add_lexeme( @lexemes ); |
401 | } |
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402 | |
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403 | ## Utility methods |
404 | |
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405 | sub TO_JSON { |
406 | my $self = shift; |
407 | return $self->text; |
408 | } |
409 | |
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410 | sub throw { |
411 | Text::Tradition::Error->throw( |
412 | 'ident' => 'Reading error', |
413 | 'message' => $_[0], |
414 | ); |
415 | } |
4d9593df |
416 | |
417 | no Moose; |
418 | __PACKAGE__->meta->make_immutable; |
419 | |
021bdbac |
420 | 1; |