1 package Equinox::Migration::MapDrivenMARCXMLProc;
8 use Equinox::Migration::SubfieldMapper 1.004;
13 Equinox::Migration::MapDrivenMARCXMLProc
21 our $VERSION = '1.002';
25 my @mods = qw( multi bib required );
34 use Equinox::Migration::MapDrivenMARCXMLProc;
42 Takes two required arguments: C<mapfile> (which will be passed along
43 to L<Equinox::Migration::SubfieldMapper> as the basis for its map),
44 and C<marcfile> (the MARC data to be processed).
46 my $m = Equinox::Migration::MapDrivenMARCXMLProc->new( mapfile => FILE,
52 my ($class, %args) = @_;
54 $verbose = 1 if $args{verbose};
59 # initialize map and taglist
60 die "Argument 'mapfile' must be specified\n" unless ($args{mapfile});
61 $sfmap = Equinox::Migration::SubfieldMapper->new( file => $args{mapfile},
64 # initialize datastore
65 $dstore = DBM::Deep->new( file => "EMMXSSTORAGE.dbmd",
66 data_sector_size => 256 );
67 $reccount = 0; # next record ptr
68 $dstore->{tags} = $sfmap->tags; # list of all tags
69 $self->{data} = $dstore;
72 die "Argument 'marcfile' must be specified\n" unless ($args{marcfile});
73 if (-r $args{marcfile}) {
74 my $xmltwig = XML::Twig->new( twig_handlers => { record => \&parse_record } );
75 $xmltwig->parsefile( $args{marcfile} );
77 die "Can't open marc file: $!\n";
83 sub DESTROY { unlink "EMMXSSTORAGE.dbmd" }
87 Extracts data from the next record, per the mapping file.
92 my ($twig, $record) = @_;
93 my $crec = {}; # current record
95 my @fields = $record->children;
97 { process_field($f, $crec) }
99 # cleanup memory and increment pointer
103 # check for required fields
105 push @{ $dstore->{recs} }, $crec;
107 print STDERR "$reccount\n"
108 if ($verbose and !($reccount % 1000));
112 my ($field, $crec) = @_;
113 my $tag = $field->{'att'}->{'tag'};
116 unless (defined $tag) {
123 my $sub = $field->first_child('subfield');
124 $crec->{egid} = $sub->text;
127 if ($sfmap->has($tag)) {
128 push @{$crec->{tags}}, { tag => $tag, uni => undef, multi => undef };
129 push @{$crec->{tmap}{$tag}}, (@{$crec->{tags}} - 1);
130 my @subs = $field->children('subfield');
132 { process_subs($tag, $sub, $crec) }
134 # check map to ensure all declared tags and subs have a value
135 my $mods = $sfmap->mods($field);
136 for my $mappedsub ( @{ $sfmap->subfields($tag) } ) {
137 next if $mods->{multi};
138 $crec->{tags}[-1]{uni}{$mappedsub} = ''
139 unless defined $crec->{tags}[-1]{uni}{$mappedsub};
141 for my $mappedtag ( @{ $sfmap->tags }) {
142 $crec->{tmap}{$mappedtag} = undef
143 unless defined $crec->{tmap}{$mappedtag};
149 my ($tag, $sub, $crec) = @_;
150 my $code = $sub->{'att'}->{'code'};
152 # handle unmapped tag/subs
153 return unless ($sfmap->has($tag, $code));
155 # fetch our datafield struct and fieldname
156 my $dataf = $crec->{tags}[-1];
157 my $field = $sfmap->field($tag, $code);
158 $crec->{names}{$tag}{$code} = $field;
161 for my $filter ( @{$sfmap->filters($field)} ) {
162 return if ($sub->text =~ /$filter/i);
164 # handle multi modifier
165 if (my $mods = $sfmap->mods($field)) {
166 if ($mods->{multi}) {
167 push @{$dataf->{multi}{$code}}, $sub->text;
172 # if this were a multi field, it would be handled already. make sure its a singleton
173 die "Multiple occurances of a non-multi field: $tag$code at rec ",
174 ($reccount + 1),"\n" if (defined $dataf->{uni}{$code});
176 # everything seems okay
177 $dataf->{uni}{$code} = $sub->text;
182 my $mods = $sfmap->mods;
183 my $crec = $dstore->{crec};
185 for my $tag_id (keys %{$mods->{required}}) {
186 for my $code (@{$mods->{required}{$tag_id}}) {
189 for my $tag (@{$crec->{tags}}) {
190 $found = 1 if ($tag->{multi}{($tag_id . $code)});
191 $found = 1 if ($tag->{uni}{$code});
194 die "Required mapping $tag_id$code not found in rec ",$reccount,"\n"
203 Returns current record number (starting from zero)
207 sub recno { my ($self) = @_; return $self->{data}{rcnt} }
211 Returns mapped fieldname when passed a record number, tag, and code
213 my $name = $m->name(3,999,'a');
217 sub name { my ($self, $r, $t, $c) = @_; return $dstore->{recs}[$r]{names}{$t}{$c} };
221 MapDrivenMARCXMLProc implements the following modifiers, and passes
222 them to L<Equinox::Migration::SubfieldMapper>, meaning that specifying
223 any other modifiers in a MDMP map file will cause a fatal error when
228 If a mapping is declared to be C<multi>, then MDMP expects to see more
229 than one instance of that subfield per datafield, and the data is
230 handled accordingly (see L</PARSED RECORDS> below).
232 Occurring zero or one time is legal for a C<multi> mapping.
234 A mapping which is not flagged as C<multi>, but which occurs more than
235 once per datafield will cause a fatal error.
239 By default, if a mapping does not occur in a datafield, processing
240 continues normally. if a mapping has the C<required> modifier,
241 however, it must appear, or a fatal error will occur.
243 =head1 PARSED RECORDS
247 my $m = Equinox::Migration::MapDrivenMARCXMLProc->new(ARGUMENTS);
248 $rec = $m->parse_record;
250 Then C<$rec> will look like:
253 egid => evergreen_record_id,
257 multi => { code => [ val1, val2, ... ] },
258 uni => { code => value, code2 => value2, ... },
262 tmap => { tag_id => [ INDEX_LIST ], tag_id2 => [ INDEX_LIST ], ... }
265 That is, there is an C<egid> key which points to the Evergreen ID of
266 that record, a C<tags> key which points to an arrayref, and a C<tmap>
267 key which points to a hashref.
271 A reference to a list of anonymous hashes, one for each instance of
272 each tag which occurs in the map.
274 Each tag hash holds its own id (e.g. C<998>), and two references to
275 two more hashrefs, C<multi> and C<uni>.
277 The C<multi> hash holds the extracted data for tag/sub mappings which
278 have the C<multiple> modifier on them. The keys in C<multi> subfield
279 codes. The values are arrayrefs containing the content of all
280 instances of that subfield in that instance of that tag. If no tags
281 are defined as C<multi>, it will be C<undef>.
283 The C<uni> hash holds data for tag/sub mappings which occur only once
284 per instance of a tag (but may occur multiple times in a record due to
285 there being multiple instances of that tag in a record). Keys are
286 subfield codes and values are subfield content.
288 All C<uni> subfields occuring in the map are guaranteed to be
289 defined. Sufields which are mapped but do not occur in a particular
290 datafield will be given a value of '' (the null string) in the current
291 record struct. Oppose subfields which are not mapped, which will be
296 A hashref, where each key (a tag id like "650") points to a listref
297 containing the index (or indices) of C<tags> where that tag has
300 The intended use of this is to simplify the processing of data from
301 tags which can appear more than once in a MARC record, like
302 holdings. If your holdings data is in 852, C<tmap->{852}> will be a
303 listref with the indices of C<tags> which hold the data from the 852
306 Complimentarily, C<tmap> prevents data from singular datafields from
307 having to be copied for every instance of a multiple datafield, as it
308 lets you get the data from that record's one instance of whichever
309 field you're looking for.
313 Shawn Boyette, C<< <sboyette at esilibrary.com> >>
317 Please report any bugs or feature requests to the above email address.
321 You can find documentation for this module with the perldoc command.
323 perldoc Equinox::Migration::MapDrivenMARCXMLProc
326 =head1 COPYRIGHT & LICENSE
328 Copyright 2009 Equinox, all rights reserved.
330 This program is free software; you can redistribute it and/or modify it
331 under the same terms as Perl itself.
336 1; # End of Equinox::Migration::MapDrivenMARCXMLProc