sub new {
my ($class, %args) = @_;
- my $self = bless { conf => { mods => { multi => 1, biblevel => 1} },
+ my $self = bless { conf => { mods => undef },
fields => {},
tags => {} }, $class;
$self->{conf}{file} = $args{file};
$self->generate;
} else {
- die "Can't open file: $!\n";
+ die "Can't open file: $!\n";
}
}
+ if ($args{mods}) {
+ die "Argument 'mods' is wrong type\n"
+ unless (ref $args{mods} eq "ARRAY");
+ for my $mod ( @{$args{mods}} )
+ { $self->{conf}{mods}{$mod} = 1 }
+ }
+
return $self;
}
+=head2 has
-=head2 generate
+Ask it whether your mapping has various things, and it'll let you know.
+
+ $sm->has('fieldname') # is this fieldname mapped?
+ $sm->has(901) # are there any mappings for this tag?
+ $sm->has(650,'c') # is this tag/subfield combo mapped?
+ $sm->has('name', 245, 'a') # is this name mapped to 245$a?
+
+Returns 1 if true, 0 if false.
+
+FIXME: use named params instead of positional
=cut
if (defined $chunks[2]) {
return 1 if ( $self->{fields}{$chunks[0]}{tag} eq $chunks[1] and
$self->{fields}{$chunks[0]}{sub} eq $chunks[2] );
- return undef;
+ return 0;
} elsif (defined $chunks[1]) {
return 1 if ( $self->{fields}{$chunks[0]}{tag} eq $chunks[1] );
- return undef;
+ return 0;
} else {
return 1 if ( defined $self->{fields}{$chunks[0]} );
- return undef;
+ return 0;
}
}
}
+=head2 field
+
+Given a tag and subfield code,
+
+ my $fname = $sm->field(945, 'p')
+
+return the name mapped to them. Returns C<undef> if no mapping exists.
+
+=cut
+
+sub field {
+ my ($self, $tag, $sub) = @_;
+ return undef unless (defined $tag and defined $sub);
+ return undef unless $self->has($tag, $sub);
+ return $self->{tags}{$tag}{$sub};
+}
+
+=head2 mods
+
+Returns the modifiers set on a mapping.
+
+ $self->mods('fieldname')
+
+If there are no modifiers, C<undef> will be returned. Else a listref
+will be returned.
+
+=cut
+
+sub mods {
+ my ($self, $field) = @_;
+ return undef unless $self->has($field);
+ return $self->{fields}{$field}{mods};
+}
+
+=head2 filters
+
+Returns the content filters set on a mapping
+
+ $self->filters('fieldname')
+
+If there are no filters, C<undef> will be returned. Else a listref
+will be returned.
+
+=cut
+
+sub filters {
+ my ($self, $field) = @_;
+ return undef unless $self->has($field);
+ return $self->{fields}{$field}{filt};
+}
+
+
+
+=head2 generate
+
+Generate initial mapping from file.
+
+=cut
sub generate {
my ($self, $file) = @_;
chomp;
my @tokens = split /\s+/;
- if (defined $tokens[3]) {
- $self->add( field => $tokens[0], tag => $tokens[1],
- sub => $tokens[2], mod => $tokens[3] );
- } else {
- $self->add( field => $tokens[0], tag => $tokens[1], sub => $tokens[2] );
+ my $map = { mods => [], filt => [] };
+ $map->{field} = shift @tokens;
+ $map->{tag} = shift @tokens;
+ while (my $tok = shift @tokens) {
+ last if ($tok =~ m/^#/);
+ if ($tok =~ m/^[a-z]:'/) {
+ $tok .= ' ' . shift @tokens
+ until ($tokens[0] =~ m/'$/);
+ $tok .= ' ' . shift @tokens;
+ $tok =~ s/'//;
+ $tok =~ s/'$//;
+ }
+ if ($tok =~ m/^m:/)
+ { push @{$map->{mods}}, $tok }
+ elsif ($tok =~ m/^f:/)
+ { push @{$map->{filt}}, $tok }
+ elsif ($tok =~ m/^[a-z0-9]$/)
+ { $map->{sub} = $tok }
+ else
+ { die "Unknown chunk '$tok' at line $.\n" }
}
+ $self->add($map);
}
-
}
+=head2 add
+
+Add new item to mapping. Not usually called directly from user code.
+
+ $sm->add( $map );
+
+Where C<$map> is a hashref that, at a minimum, looks like
+
+ { field => "value", tag => NNN, sub => X }
+
+and may also have the key/value pairs
+
+ mods => [ ITEMS ]
+ filt => [ ITEMS ]
+
+=cut
+
sub add {
- my ($self, %toks) = @_;
+ my ($self, $map) = @_;
+
+ # trim the mods and filters
+ my $mods = []; my %mods = ();
+ my $filt = []; my %filt = ();
+ for my $m (@{$map->{mods}}) {
+ die "Modifier collision '$m' at line $." if $mods{$m};
+ $m =~ s/^m://;
+ push @{$mods}, $m; $mods{$m} = 1;
+ }
+ for my $f (@{$map->{filt}}) {
+ die "Modifier collision '$f' at line $." if $filt{$f};
+ $f =~ s/^f://;
+ push @{$filt}, $f; $filt{$f} = 1;
+ }
+ $map->{mods} = $mods;
+ $map->{filt} = $filt;
# check bits for validity
- $self->validate(\%toks);
+ $self->validate($map);
+
+ # add data to the fields hash
+ $self->{fields}{ $map->{field} } = { tag => $map->{tag},
+ sub => $map->{sub},
+ mods => $map->{mods},
+ filt => $map->{filt}
+ };
+ # and to the tags hash
+ $self->{tags}{ $map->{tag} }{ $map->{sub} } = $map->{field};
+}
- $toks{mod} = (defined $toks{mod}) ? $toks{mod} : 0;
+=head2 validate
- $self->{fields}{$toks{field}} = { tag => $toks{tag}, sub => $toks{sub}, mod => $toks{mod}};
- $self->{tags}{$toks{tag}}{$toks{sub}} = $toks{field};
-}
+Passed a reference to the hash given to C<add>, validate scans its
+contents for common errors and dies if there is an issue.
+
+ * field, tag, and sub are required
+ * fieldnames must start with a letter
+ * fieldnames must be unique
+ * tag must be between 0 and 999
+ * subfield code must be a single alphanumeric character
+ * tag+subfield can only be mapped once
+ * if a list of allowable mod values was given in the call to
+ C<new>, any modifiers must be on that list
+
+=cut
sub validate {
- my ($self, $toks) = @_;
+ my ($self, $map) = @_;
$.= 1 unless defined $.;
die "Required field missing (line $.)\n"
- unless (defined $toks->{field} and defined $toks->{tag} and defined $toks->{sub});
+ unless (defined $map->{field} and defined $map->{tag} and defined $map->{sub});
die "Fieldnames must start with letter (line $.)\n"
- unless ($toks->{field} =~ /^\w/);
+ unless ($map->{field} =~ /^[a-zA-z]/);
die "Invalid tag (line $.)\n"
- if ($toks->{tag} =~ /\D/ or $toks->{tag} < 0 or $toks->{tag} > 999);
+ if ($map->{tag} =~ /[^\d\-]/ or $map->{tag} < 0 or $map->{tag} > 999);
die "Invalid subfield code (line $.)\n"
- if (length $toks->{sub} != 1 or $toks->{sub} =~ /[^a-z0-9]/);
+ if (length $map->{sub} != 1 or $map->{sub} =~ /[^a-zA-Z0-9]/);
- # the next thing (if it exists), must be a comment or valid modifier
- if (defined $toks->{mod}) {
- die "Unknown chunk (line $.)\n"
- unless (defined $self->{conf}{mods}{$toks->{mod}} or $toks->{mod} =~ /^#/);
+ # test mod names if we have a set to check against
+ if (defined $self->{conf}{mods}) {
+ for my $mod ( @{$map->{mods}} ) {
+ die "Modifier '$mod' not allowed\n"
+ unless $self->{conf}{mods}{$mod};
+ }
}
die "Fieldnames must be unique (line $.)\n"
- if (defined $self->{fields}{$toks->{field}});
+ if (defined $self->{fields}{$map->{field}});
+
+ die "Subfields cannot be mapped twice (line $.)\n"
+ if (defined $self->{tags}{$map->{tag}}{$map->{sub}});
- die "Subfields cannot be multimapped (line $.)\n"
- if (defined $self->{tags}{$toks->{tag}}{$toks->{sub}});
}
projects / migration-tools.git / blobdiff