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use WebPAC::Common; |
use WebPAC::Common; |
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use base qw/WebPAC::Common/; |
use base qw/WebPAC::Common/; |
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use Text::Iconv; |
use Text::Iconv; |
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use Data::Dumper; |
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=head1 NAME |
=head1 NAME |
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=head1 VERSION |
=head1 VERSION |
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Version 0.03 |
Version 0.07 |
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=cut |
=cut |
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our $VERSION = '0.03'; |
our $VERSION = '0.07'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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my $db = WebPAC::Input->new( |
my $db = WebPAC::Input->new( |
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module => 'WebPAC::Input::ISIS', |
module => 'WebPAC::Input::ISIS', |
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config => $config, |
config => $config, |
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lookup => $lookup_obj, |
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low_mem => 1, |
low_mem => 1, |
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); |
); |
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$db->open('/path/to/database'); |
$db->open('/path/to/database'); |
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print "database size: ",$db->size,"\n"; |
print "database size: ",$db->size,"\n"; |
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while (my $rec = $db->fetch) { |
while (my $rec = $db->fetch) { |
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} |
# do something with $rec |
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} |
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my $db = new WebPAC::Input( |
my $db = new WebPAC::Input( |
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module => 'WebPAC::Input::MARC', |
module => 'WebPAC::Input::MARC', |
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code_page => 'ISO-8859-2', |
encoding => 'ISO-8859-2', |
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low_mem => 1, |
low_mem => 1, |
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recode => 'char pairs', |
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no_progress_bar => 1, |
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); |
); |
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C<module> is low-level file format module. See L<WebPAC::Input::Isis> and |
C<module> is low-level file format module. See L<WebPAC::Input::Isis> and |
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L<WebPAC::Input::MARC>. |
L<WebPAC::Input::MARC>. |
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Optional parametar C<code_page> specify application code page (which will be |
Optional parametar C<encoding> specify application code page (which will be |
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used internally). This should probably be your terminal encoding, and by |
used internally). This should probably be your terminal encoding, and by |
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default, it C<ISO-8859-2>. |
default, it C<ISO-8859-2>. |
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Default is not to use C<low_mem> options (see L<MEMORY USAGE> below). |
Default is not to use C<low_mem> options (see L<MEMORY USAGE> below). |
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C<recode> is optional string constisting of character or words pairs that |
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should be replaced in input stream. |
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C<no_progress_bar> disables progress bar output on C<STDOUT> |
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This function will also call low-level C<init> if it exists with same |
This function will also call low-level C<init> if it exists with same |
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parametars. |
parametars. |
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my $log = $self->_get_logger; |
my $log = $self->_get_logger; |
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$log->logconfess("code_page argument is not suppored any more. change it to encoding") if ($self->{lookup}); |
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$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if ($self->{lookup}); |
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$log->logconfess("specify low-level file format module") unless ($self->{module}); |
$log->logconfess("specify low-level file format module") unless ($self->{module}); |
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my $module = $self->{module}; |
my $module = $self->{module}; |
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$module =~ s#::#/#g; |
$module =~ s#::#/#g; |
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$module .= '.pm'; |
$module .= '.pm'; |
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$log->debug("require low-level module $self->{module} from $module"); |
$log->debug("require low-level module $self->{module} from $module"); |
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require $module; |
require $module; |
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eval $self->{module} .'->import'; |
#eval $self->{module} .'->import'; |
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# check if required subclasses are implemented |
# check if required subclasses are implemented |
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foreach my $subclass (qw/open_db fetch_rec/) { |
foreach my $subclass (qw/open_db fetch_rec init/) { |
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if ( $self->can($subclass) ) { |
my $n = $self->{module} . '::' . $subclass; |
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$log->debug("imported $subclass"); |
if (! defined &{ $n }) { |
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my $missing = "missing $subclass in $self->{module}"; |
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$self->{$subclass} = sub { $log->logwarn($missing) }; |
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} else { |
} else { |
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$log->warn("missing $subclass in $self->{module}"); |
$self->{$subclass} = \&{ $n }; |
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} |
} |
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} |
} |
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if ($self->can('init')) { |
if ($self->{init}) { |
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$log->debug("calling init"); |
$log->debug("calling init"); |
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$self->init(@_); |
$self->{init}->($self, @_); |
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} |
} |
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$self->{'code_page'} ||= 'ISO-8859-2'; |
$self->{'encoding'} ||= 'ISO-8859-2'; |
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# running with low_mem flag? well, use DBM::Deep then. |
# running with low_mem flag? well, use DBM::Deep then. |
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if ($self->{'low_mem'}) { |
if ($self->{'low_mem'}) { |
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limit => 500, |
limit => 500, |
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offset => 6000, |
offset => 6000, |
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lookup => $lookup_obj, |
lookup => $lookup_obj, |
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stats => 1, |
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lookup_ref => sub { |
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my ($k,$v) = @_; |
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# store lookup $k => $v |
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}, |
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); |
); |
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By default, C<code_page> is assumed to be C<852>. |
By default, C<code_page> is assumed to be C<852>. |
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C<limit> is optional parametar to read just C<limit> records from database |
C<limit> is optional parametar to read just C<limit> records from database |
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C<stats> create optional report about usage of fields and subfields |
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C<lookup_coderef> is closure to call when adding key => $value combinations to |
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lookup. |
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Returns size of database, regardless of C<offset> and C<limit> |
Returns size of database, regardless of C<offset> and C<limit> |
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parametars, see also C<size>. |
parametars, see also C<size>. |
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my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
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$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_coderef") if ($arg->{lookup}); |
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$log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef})) |
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if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE'); |
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$log->logcroak("need path") if (! $arg->{'path'}); |
$log->logcroak("need path") if (! $arg->{'path'}); |
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my $code_page = $arg->{'code_page'} || '852'; |
my $code_page = $arg->{'code_page'} || '852'; |
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# store data in object |
# store data in object |
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$self->{'code_page'} = $code_page; |
$self->{'input_code_page'} = $code_page; |
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foreach my $v (qw/path offset limit/) { |
foreach my $v (qw/path offset limit/) { |
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$self->{$v} = $arg->{$v} if ($arg->{$v}); |
$self->{$v} = $arg->{$v} if ($arg->{$v}); |
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} |
} |
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# create Text::Iconv object |
# create Text::Iconv object |
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$self->{iconv} = Text::Iconv->new($code_page,$self->{'code_page'}); |
$self->{iconv} = Text::Iconv->new($code_page,$self->{'encoding'}); ## FIXME remove! |
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my $filter_ref; |
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my ($db, $size) = $self->open_db( |
if ($self->{recode}) { |
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my @r = split(/\s/, $self->{recode}); |
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if ($#r % 2 != 1) { |
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$log->logwarn("recode needs even number of elements (some number of valid pairs)"); |
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} else { |
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my $recode; |
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while (@r) { |
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my $from = shift @r; |
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my $to = shift @r; |
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$recode->{$from} = $to; |
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} |
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my $regex = join '|' => keys %{ $recode }; |
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$log->debug("using recode regex: $regex"); |
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$filter_ref = sub { |
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my $t = shift; |
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$t =~ s/($regex)/$recode->{$1}/g; |
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return $t; |
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}; |
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} |
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} |
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my ($db, $size) = $self->{open_db}->( $self, |
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path => $arg->{path}, |
path => $arg->{path}, |
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filter => $filter_ref, |
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%{ $arg }, |
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); |
); |
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unless ($db) { |
unless (defined($db)) { |
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$log->logwarn("can't open database $arg->{path}, skipping..."); |
$log->logwarn("can't open database $arg->{path}, skipping..."); |
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return; |
return; |
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} |
} |
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return; |
return; |
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} |
} |
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my $offset = 1; |
my $from_rec = 1; |
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my $limit = $size; |
my $to_rec = $size; |
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if (my $s = $self->{offset}) { |
if (my $s = $self->{offset}) { |
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$log->info("skipping to MFN $s"); |
$log->debug("skipping to MFN $s"); |
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$offset = $s; |
$from_rec = $s; |
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} else { |
} else { |
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$self->{offset} = $offset; |
$self->{offset} = $from_rec; |
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} |
} |
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if ($self->{limit}) { |
if ($self->{limit}) { |
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$log->info("limiting to ",$self->{limit}," records"); |
$log->debug("limiting to ",$self->{limit}," records"); |
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$limit = $offset + $self->{limit} - 1; |
$to_rec = $from_rec + $self->{limit} - 1; |
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$limit = $size if ($limit > $size); |
$to_rec = $size if ($to_rec > $size); |
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} |
} |
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# store size for later |
# store size for later |
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$self->{size} = ($limit - $offset) ? ($limit - $offset + 1) : 0; |
$self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0; |
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$log->info("processing $self->{size} records in $code_page, convert to $self->{code_page}"); |
$log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{encoding}", $self->{stats} ? ' [stats]' : ''); |
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# read database |
# read database |
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for (my $pos = $offset; $pos <= $limit; $mfn++) { |
for (my $pos = $from_rec; $pos <= $to_rec; $pos++) { |
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$log->debug("position: $pos\n"); |
$log->debug("position: $pos\n"); |
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my $rec = $self->fetch_rec( $db, $pos ); |
my $rec = $self->{fetch_rec}->($self, $db, $pos ); |
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$log->debug(sub { Dumper($rec) }); |
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if (! $rec) { |
if (! $rec) { |
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$log->warn("record $pos empty? skipping..."); |
$log->warn("record $pos empty? skipping..."); |
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} |
} |
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# create lookup |
# create lookup |
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$self->{'lookup'}->add( $rec ) if ($rec && $self->{'lookup'}); |
$arg->{'lookup_coderef'}->( $rec ) if ($rec && $arg->{'lookup_coderef'}); |
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# update counters for statistics |
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if ($self->{stats}) { |
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map { |
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my $fld = $_; |
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$self->{_stats}->{fld}->{ $fld }++; |
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if (ref($rec->{ $fld }) eq 'ARRAY') { |
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map { |
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if (ref($_) eq 'HASH') { |
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map { |
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$self->{_stats}->{sf}->{ $fld }->{ $_ }++; |
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} keys %{ $_ }; |
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} else { |
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$self->{_stats}->{repeatable}->{ $fld }++; |
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} |
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} @{ $rec->{$fld} }; |
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} |
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} keys %{ $rec }; |
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} |
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$self->progress_bar($pos,$limit); |
$self->progress_bar($pos,$to_rec) unless ($self->{no_progress_bar}); |
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} |
} |
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$self->{last_pcnt} = 0; |
$self->{last_pcnt} = 0; |
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# store max mfn and return it. |
# store max mfn and return it. |
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$self->{max_pos} = $limit; |
$self->{max_pos} = $to_rec; |
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$log->debug("max_pos: $limit"); |
$log->debug("max_pos: $to_rec"); |
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return $size; |
return $size; |
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} |
} |
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return; |
return; |
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} |
} |
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$self->progress_bar($mfn,$self->{max_pos}); |
$self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar}); |
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my $rec; |
my $rec; |
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return $self->{pos} = (($pos - 1) || -1); |
return $self->{pos} = (($pos - 1) || -1); |
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} |
} |
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=head2 stats |
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Dump statistics about field and subfield usage |
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print $input->stats; |
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=cut |
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sub stats { |
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my $self = shift; |
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my $log = $self->_get_logger(); |
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my $s = $self->{_stats}; |
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if (! $s) { |
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$log->warn("called stats, but there is no statistics collected"); |
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return; |
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} |
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my $max_fld = 0; |
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my $out = join("\n", |
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map { |
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my $f = $_ || die "no field"; |
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my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}"; |
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$max_fld = $v if ($v > $max_fld); |
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my $o = sprintf("%4s %d ~", $f, $v); |
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if (defined($s->{sf}->{$f})) { |
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map { |
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$o .= sprintf(" %s:%d", $_, $s->{sf}->{$f}->{$_}); |
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} sort keys %{ $s->{sf}->{$f} }; |
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} |
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if (my $v_r = $s->{repeatable}->{$f}) { |
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$o .= " ($v_r)" if ($v_r != $v); |
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} |
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$o; |
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} sort { $a cmp $b } keys %{ $s->{fld} } |
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); |
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$log->debug( sub { Dumper($s) } ); |
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return $out; |
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} |
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=head1 MEMORY USAGE |
=head1 MEMORY USAGE |
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