use strict;
use XML::Twig;
-use Equinox::Migration::SubfieldMapper;
+use Equinox::Migration::SubfieldMapper 1.002;
=head1 NAME
return $self->{data}{crec};
}
-=head2 process_field
-
-=cut
-
sub process_field {
my ($self, $field) = @_;
my $map = $self->{map};
my $tag = $field->{'att'}->{'tag'};
my $crec = $self->{data}{crec};
+ # leader
+ unless (defined $tag) {
+ #FIXME
+ return;
+ }
+
# datafields
- if (defined $tag) {
- if ($tag == 903) {
- my $sub = $field->first_child('subfield');
- $crec->{egid} = $sub->text;;
- } elsif ($map->has($tag)) {
- push @{$crec->{tags}}, { tag => $tag, uni => undef, multi => undef };
- my @subs = $field->children('subfield');
- for my $sub (@subs)
- { $self->process_subs($tag, $sub) }
- # check map to ensure all declared subs are in
+ if ($tag == 903) {
+ my $sub = $field->first_child('subfield');
+ $crec->{egid} = $sub->text;
+ return;
+ }
+ if ($map->has($tag)) {
+ push @{$crec->{tags}}, { tag => $tag, uni => undef, multi => undef };
+ my @subs = $field->children('subfield');
+ for my $sub (@subs)
+ { $self->process_subs($tag, $sub) }
+ # check map to ensure all declared subs have a value
+ my $mods = $map->mods($field);
+ for my $mappedsub ( @{ $map->subfields($tag) } ) {
+ next if $mods->{multi};
+ $crec->{tags}[-1]{uni}{$mappedsub} = ''
+ unless defined $crec->{tags}[-1]{uni}{$mappedsub};
}
}
}
-=head2 process_subs
-
-=cut
-
sub process_subs {
my ($self, $tag, $sub) = @_;
my $map = $self->{map};
return;
}
+ # fetch our datafield struct and fieldname
my $dataf = $self->{data}{crec}{tags}[-1];
my $field = $map->field($tag, $code);
=head1 PARSED RECORDS
+Given:
+
+ my $m = Equinox::Migration::MapDrivenMARCXMLProc->new(ARGUMENTS);
+ $rec = $m->parse_record;
+
+Then C<$rec> will look like:
+
{
egid => evergreen_record_id,
bib => {
=head3 C<bib>
-This hashref holds extracted data which should occur once per record
-(the default assumption is that a tag/subfield pair can occur multiple
-times per record). The keys are composed of tag id and subfield code,
-catenated (e.g. 901c). The values are the contents of that subfield of
-that tag.
+A reference to a hash which holds extracted data which occurs only
+once per record (and is therefore "bib-level"; the default assumption
+is that a tag/subfield pair can occur multiple times per record). The
+keys are composed of tag id and subfield code, catenated
+(e.g. 901c). The values are the contents of that subfield of that tag.
-If there are no tags defined as bib-level, C<bib> will be C<undef>.
+If there are no tags defined as bib-level in the mapfile, C<bib> will
+be C<undef>.
=head3 C<tags>
-This arrayref holds anonymous hashrefs, one for each instance of each
-tag which occurs in the map. Each tag hashref holds its own id
-(e.g. C<998>), and two more hashrefs, C<multi> and C<uni>.
+A reference to a list of anonymous hashes, one for each instance of
+each tag which occurs in the map.
+
+Each tag hash holds its own id (e.g. C<998>), and two references to
+two more hashrefs, C<multi> and C<uni>.
-The C<multi> hashref holds the extracted data for tag/sub mappings
-which have the C<multiple> modifier on them. The keys in C<multi> are
+The C<multi> hash holds the extracted data for tag/sub mappings which
+have the C<multiple> modifier on them. The keys in C<multi> are
composed of the tag id and subfield code, catenated
(e.g. C<901c>). The values are arrayrefs containing the content of all
-instances of that subfield in that instance of that tag.
-
-The C<uni> hashref holds data for tag/sub mappings which occur only
-once per instance of a tag (but may occur multiple times in a record
-due to there being multiple instances of that tag in a record). Keys
-are subfield codes and values are subfield content.
-
-If no tags are defined as C<multi>, it will be C<undef>.
+instances of that subfield in that instance of that tag. If no tags
+are defined as C<multi>, it will be C<undef>.
+
+The C<uni> hash holds data for tag/sub mappings which occur only once
+per instance of a tag (but may occur multiple times in a record due to
+there being multiple instances of that tag in a record). Keys are
+subfield codes and values are subfield content.
+
+All C<uni> subfields occuring in the map are guaranteed to be
+defined. Sufields which are mapped but do not occur in a particular
+datafield will be given a value of '' (the null string) in the current
+record struct. Oppose subfields which are not mapped, which will be
+C<undef>.
=head1 UNMAPPED TAGS
projects / migration-tools.git / blobdiff