my ($class, %args) = @_;
my $self = bless { mods => { multi => {},
+ bib => {},
required => {},
},
data => { recs => undef, # X::T record objects
rptr => 0, # next record pointer
crec => undef, # parsed record storage
- tmap => undef, # tag_id-to-tag array map
},
}, $class;
return 0 unless defined $self->{data}{recs}[ $self->{data}{rptr} ];
my $record = $self->{data}{recs}[ $self->{data}{rptr} ];
$self->{data}{crec} = { egid => undef, tags => undef };
- $self->{data}{tmap} = {};
my @fields = $record->children;
for my $f (@fields)
- { $self->process_field($f) }
+ { $self->process_field($f); $f->purge; }
# cleanup memory and increment pointer
$record->purge;
my $map = $self->{map};
my $tag = $field->{'att'}->{'tag'};
my $crec = $self->{data}{crec};
- my $tmap = $self->{data}{tmap};
# leader
unless (defined $tag) {
}
if ($map->has($tag)) {
push @{$crec->{tags}}, { tag => $tag, uni => undef, multi => undef };
- push @{$tmap->{$tag}}, (@{$crec->{tags}} - 1);
+ push @{$crec->{tmap}{$tag}}, (@{$crec->{tags}} - 1);
my @subs = $field->children('subfield');
for my $sub (@subs)
- { $self->process_subs($tag, $sub) }
- # check map to ensure all declared subs have a value
+ { $self->process_subs($tag, $sub); $sub->purge; }
+
+ # check map to ensure all declared tags and 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};
}
+ for my $mappedtag ( @{ $map->tags }) {
+ $crec->{tmap}{$mappedtag} = undef
+ unless defined $crec->{tmap}{$mappedtag};
+ }
}
}
# fetch our datafield struct and fieldname
my $dataf = $self->{data}{crec}{tags}[-1];
my $field = $map->field($tag, $code);
+ $self->{data}{crec}{names}{$tag}{$code} = $field;
# test filters
for my $filter ( @{$map->filters($field)} ) {
}
+=head2 recno
+
+Returns current record number (starting from zero)
+
+=cut
+
+sub recno { my ($self) = @_; return $self->{data}{rptr} }
+
+=head2 name
+
+Returns mapped fieldname when pass a tag and code
+
+ my $name = $m->name(999,'a');
+
+=cut
+
+sub name { my ($self, $t, $c) = @_; return $self->{data}{crec}{names}{$t}{$c} };
+
=head1 MODIFIERS
MapDrivenMARCXMLProc implements the following modifiers, and passes
uni => { code => value, code2 => value2, ... },
},
...
- ]
+ ],
+ tmap => { tag_id => [ INDEX_LIST ], tag_id2 => [ INDEX_LIST ], ... }
}
That is, there is an C<egid> key which points to the Evergreen ID of
-that record, and a C<tags> key which points to an arrayref.
+that record, a C<tags> key which points to an arrayref, and a C<tmap>
+key which points to a hashref.
=head3 C<tags>
record struct. Oppose subfields which are not mapped, which will be
C<undef>.
+=head3 tmap
+
+A hashref, where each key (a tag id like "650") points to a listref
+containing the index (or indices) of C<tags> where that tag has
+extracted data.
+
+The intended use of this is to simplify the processing of data from
+tags which can appear more than once in a MARC record, like
+holdings. If your holdings data is in 852, C<tmap->{852}> will be a
+listref with the indices of C<tags> which hold the data from the 852
+datafields.
+
+Complimentarily, C<tmap> prevents data from singular datafields from
+having to be copied for every instance of a multiple datafield, as it
+lets you get the data from that record's one instance of whichever
+field you're looking for.
=head1 AUTHOR