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BEGIN { |
BEGIN { |
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use Exporter (); |
use Exporter (); |
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use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); |
use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); |
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$VERSION = 0.03; |
$VERSION = 0.05; |
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@ISA = qw (Exporter); |
@ISA = qw (Exporter); |
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#Give a hoot don't pollute, do not export more than needed by default |
#Give a hoot don't pollute, do not export more than needed by default |
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@EXPORT = qw (); |
@EXPORT = qw (); |
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=head1 NAME |
=head1 NAME |
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IsisDB - Read CDS/ISIS database |
IsisDB - Read CDS/ISIS, WinISIS and IsisMarc database |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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This module will read CDS/ISIS databases and create hash values out of it. |
This module will read ISIS databases created by DOS CDS/ISIS, WinIsis or |
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It can be used as perl-only alternative to OpenIsis module. |
IsisMarc. It can be used as perl-only alternative to OpenIsis module. |
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This will module will always be slower that OpenIsis module which use C |
It can create hash values from data in ISIS database (using C<to_hash>), |
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library. However, since it's written in perl, it's platform independent (so |
ASCII dump (using C<to_ascii>) or just hash with field names and packed |
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you don't need C compiler), and can be easily modified. |
values (like C<^asomething^belse>). |
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Unique feature of this module is ability to C<include_deleted> records. |
Unique feature of this module is ability to C<include_deleted> records. |
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It will also skip zero sized fields (OpenIsis has a bug in XS bindings, so |
It will also skip zero sized fields (OpenIsis has a bug in XS bindings, so |
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fields which are zero sized will be filled with random junk from memory). |
fields which are zero sized will be filled with random junk from memory). |
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It also has support for identifiers (only if ISIS database is created by |
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IsisMarc), see C<to_hash>. |
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This will module will always be slower than OpenIsis module which use C |
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library. However, since it's written in perl, it's platform independent (so |
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you don't need C compiler), and can be easily modified. I hope that it |
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creates data structures which are easier to use than ones created by |
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OpenIsis, so reduced time in other parts of the code should compensate for |
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slower performance of this module (speed of reading ISIS database is |
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rarely an issue). |
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=head1 METHODS |
=head1 METHODS |
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=cut |
=cut |
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=head2 new |
=head2 new |
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Open CDS/ISIS database |
Open ISIS database |
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my $isis = new IsisDB( |
my $isis = new IsisDB( |
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isisdb => './cds/cds', |
isisdb => './cds/cds', |
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read_fdt => 1, |
read_fdt => 1, |
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debug => 1, |
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include_deleted => 1, |
include_deleted => 1, |
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hash_filter => sub { |
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my $v = shift; |
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$v =~ s#foo#bar#g; |
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}, |
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debug => 1, |
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); |
); |
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Options are described below: |
Options are described below: |
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=item isisdb |
=item isisdb |
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Prefix path to CDS/ISIS. It should contain full or relative path to database |
This is full or relative path to ISIS database files which include |
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and common prefix of C<.FDT>, C<.MST>, C<.CNT>, C<.XRF> and C<.MST> files. |
common prefix of C<.FDT>, C<.MST>, C<.CNT>, C<.XRF> and C<.MST> files. |
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In this example it uses C<./cds/cds.MST> and related files. |
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=item read_fdt |
=item read_fdt |
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Boolean flag to specify if field definition table should be read. It's off |
Boolean flag to specify if field definition table should be read. It's off |
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by default. |
by default. |
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=item debug |
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Dump a C<lot> of debugging output. |
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=item include_deleted |
=item include_deleted |
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Don't skip logically deleted records in ISIS. |
Don't skip logically deleted records in ISIS. |
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=item hash_filter |
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Filter code ref which will be used before data is converted to hash. |
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=item debug |
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Dump a B<lot> of debugging output. |
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=back |
=back |
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It will also set C<$isis-E<gt>{'maxmfn'}> which is maximum MFN stored in database. |
It will also set C<$isis-E<gt>{'maxmfn'}> which is maximum MFN stored in database. |
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croak "new needs database name (isisdb) as argument!" unless ({@_}->{isisdb}); |
croak "new needs database name (isisdb) as argument!" unless ({@_}->{isisdb}); |
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foreach my $v (qw{isisdb debug include_deleted}) { |
foreach my $v (qw{isisdb debug include_deleted hash_filter}) { |
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$self->{$v} = {@_}->{$v}; |
$self->{$v} = {@_}->{$v}; |
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} |
} |
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close(fileCNT); |
close(fileCNT); |
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print Dumper($self) if ($self->{debug}); |
print Dumper($self),"\n" if ($self->{debug}); |
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# open files for later |
# open files for later |
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open($self->{'fileXRF'}, $self->{isisdb}.".XRF") || croak "can't open '$self->{isisdb}.XRF': $!"; |
open($self->{'fileXRF'}, $self->{isisdb}.".XRF") || croak "can't open '$self->{isisdb}.XRF': $!"; |
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my $rec = $isis->fetch(55); |
my $rec = $isis->fetch(55); |
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Returns hash with keys which are field names and values are unpacked values |
Returns hash with keys which are field names and values are unpacked values |
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for that field. |
for that field like this: |
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$rec = { |
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'210' => [ '^aNew York^cNew York University press^dcop. 1988' ], |
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'990' => [ '2140', '88', 'HAY' ], |
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}; |
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=cut |
=cut |
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} |
} |
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close(fileMST); |
close(fileMST); |
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print Dumper($self) if ($self->{debug}); |
print Dumper($self),"\n" if ($self->{debug}); |
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return $self->{'record'}; |
return $self->{'record'}; |
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} |
} |
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=head2 to_ascii |
=head2 to_ascii |
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Dump ascii output of selected MFN |
Dump ASCII output of record with specified MFN |
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print $isis->to_ascii(42); |
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It outputs something like this: |
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print $isis->to_ascii(55); |
210 ^aNew York^cNew York University press^dcop. 1988 |
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990 2140 |
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990 88 |
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990 HAY |
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If C<read_fdt> is specified when calling C<new> it will display field names |
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from C<.FDT> file instead of numeric tags. |
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=cut |
=cut |
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my $out = "0\t$mfn"; |
my $out = "0\t$mfn"; |
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foreach my $f (sort keys %{$rec}) { |
foreach my $f (sort keys %{$rec}) { |
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$out .= "\n$f\t".join("\n$f\t",@{$self->{record}->{$f}}); |
my $fn = $self->tag_name($f); |
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$out .= "\n$fn\t".join("\n$fn\t",@{$self->{record}->{$f}}); |
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} |
} |
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$out .= "\n"; |
$out .= "\n"; |
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return $out; |
return $out; |
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} |
} |
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# |
=head2 to_hash |
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# XXX porting from php left-over: |
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Read record with specified MFN and convert it to hash |
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# do I *REALLY* need those methods, or should I use |
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# $self->{something} directly? |
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# |
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# Probably direct usage is better! |
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# |
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sub TagName { |
my $hash = $isis->to_hash($mfn); |
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It has ability to convert characters (using C<hash_filter> from ISIS |
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database before creating structures enabling character re-mapping or quick |
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fix-up of data. |
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This function returns hash which is like this: |
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$hash = { |
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'210' => [ |
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{ |
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'c' => 'New York University press', |
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'a' => 'New York', |
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'd' => 'cop. 1988' |
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} |
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], |
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'990' => [ |
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'2140', |
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'88', |
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'HAY' |
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], |
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}; |
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You can later use that hash to produce any output from ISIS data. |
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If database is created using IsisMarc, it will also have to special fields |
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which will be used for identifiers, C<i1> and C<i2> like this: |
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'200' => [ |
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{ |
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'i1' => '1', |
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'i2' => ' ' |
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'a' => 'Goa', |
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'f' => 'Valdo D\'Arienzo', |
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'e' => 'tipografie e tipografi nel XVI secolo', |
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} |
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], |
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This method will also create additional field C<000> with MFN. |
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=cut |
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sub to_hash { |
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my $self = shift; |
my $self = shift; |
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return $self->{TagName}; |
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my $mfn = shift || confess "need mfn!"; |
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# init record to include MFN as field 000 |
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my $rec = { '000' => $mfn }; |
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my $row = $self->fetch($mfn); |
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foreach my $k (keys %{$row}) { |
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foreach my $l (@{$row->{$k}}) { |
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# filter output |
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$l = $self->{'hash_filter'}->($l) if ($self->{'hash_filter'}); |
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my $val; |
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# has identifiers? |
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($val->{'i1'},$val->{'i2'}) = ($1,$2) if ($l =~ s/^([01 #])([01 #])//); |
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# has subfields? |
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if ($l =~ m/\^/) { |
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foreach my $t (split(/\^/,$l)) { |
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next if (! $t); |
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$val->{substr($t,0,1)} = substr($t,1); |
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} |
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} else { |
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$val = $l; |
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} |
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push @{$rec->{$k}}, $val; |
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} |
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} |
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return $rec; |
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} |
} |
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sub NextMFN { |
=head2 tag_name |
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Return name of selected tag |
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print $isis->tag_name('200'); |
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=cut |
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sub tag_name { |
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my $self = shift; |
my $self = shift; |
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return $self->{NXTMFN}; |
my $tag = shift || return; |
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return $self->{'TagName'}->{$tag} || $tag; |
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} |
} |
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1; |
1; |
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dpavlin@rot13.org |
dpavlin@rot13.org |
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http://www.rot13.org/~dpavlin/ |
http://www.rot13.org/~dpavlin/ |
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This module is based heavily on code from LIBISIS.PHP - Library to read ISIS files V0.1.1 |
This module is based heavily on code from C<LIBISIS.PHP> library to read ISIS files V0.1.1 |
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written in php and (c) 2000 Franck Martin - <franck@sopac.org> released under LGPL. |
written in php and (c) 2000 Franck Martin <franck@sopac.org> and released under LGPL. |
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=head1 COPYRIGHT |
=head1 COPYRIGHT |
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=head1 SEE ALSO |
=head1 SEE ALSO |
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L<http://www.openisis.org|OpenIsis>, perl(1). |
OpenIsis web site L<http://www.openisis.org> |
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perl4lib site L<http://perl4lib.perl.org> |
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