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package WebPAC::Input::XML; |
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|
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use warnings; |
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use strict; |
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|
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use WebPAC::Input; |
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use base qw/WebPAC::Common/; |
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|
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use XML::Simple; |
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use File::Find; |
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use File::Slurp; |
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|
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use Data::Dump qw/dump/; |
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|
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=head1 NAME |
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|
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WebPAC::Input::XML - support for reading XML files |
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|
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=cut |
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|
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our $VERSION = '0.02'; |
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|
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=head1 FUNCTIONS |
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|
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=head2 new |
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|
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Returns new low-level input API object |
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|
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my $input = new WebPAC::Input::XML( |
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path => '/path/to/XML/records.txt' |
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filter => sub { |
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my ($l,$field_nr) = @_; |
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# do something with $l which is line of input file |
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return $l; |
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}, |
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mungle => 'conf/mungle/xml-mungle.pl', |
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} |
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|
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Options: |
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|
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=over 4 |
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|
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=item path |
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|
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path to directory with xml files ending in C<.xml> |
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|
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=item mungle |
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|
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path to perl data_structure mungler which will be called to pre-normalize |
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hash produced by this module. |
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|
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It's ugly and souldn't be really here, but I didn't wanted to write separate |
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input module for each possible XML in the face of the earth, and having perl |
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power to transform hash is just... Best solution :-) |
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|
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=back |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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|
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my $arg = {@_}; |
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|
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#warn "#### arg = ",dump( $arg ); |
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|
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my $log = $self->_get_logger(); |
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$log->logdie("can't find path ", $arg->{path}, ": $!\n") unless -d $arg->{path}; |
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$log->info("collecting xml files from ", $arg->{path}); |
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|
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my @files; |
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|
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find({ |
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wanted => sub { |
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my $path = $File::Find::name; |
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return unless -f $path && $path =~ m/\.xml$/i; |
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push @files, $path; |
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}, |
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follow => 1, |
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}, $arg->{path} ); |
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|
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$log->info("found ", $#files + 1, " XML files in ", $arg->{path}); |
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|
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$self->{_files} = [ sort @files ]; |
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|
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if ( my $path = $arg->{mungle} ) { |
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$log->logdie("can't find $path: $!") unless -r $path; |
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$log->info("using $path as mungle rules"); |
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|
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$self->{mungle_rules} = read_file( $path ) || $log->logdie("can't open $path: $!"); |
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} |
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|
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$self ? return $self : return undef; |
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} |
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|
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=head2 fetch_rec |
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Return record with ID C<$mfn> from database |
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|
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my $rec = $input->fetch_rec( $mfn, $filter_coderef ); |
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|
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=cut |
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|
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sub fetch_rec { |
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my $self = shift; |
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|
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my ( $mfn, $filter_coderef ) = @_; |
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my $path = $self->{_files}->[ $mfn - 1 ] || return; |
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|
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my $log = $self->_get_logger(); |
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|
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our $xml = XMLin( |
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$path, |
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# ForceArray => 1, |
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# ForceContent => 1, |
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KeepRoot => 1, |
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# SuppressEmpty => 1, # '' undef |
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|
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) || $log->logdie("can't open $path: $!"); |
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|
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$log->debug("fetch_rec( $mfn ) => $path => xml is ",sub { dump($xml) }); |
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|
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our $ds; |
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|
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if ( my $rules = $self->{mungle_rules} ) { |
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|
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sub get_ds { |
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# warn "### get_ds xml = ",dump($xml); |
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return $xml; |
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} |
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sub set_ds { |
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my $hash = {@_}; |
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# warn "### set_ds hash = ",dump($hash); |
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foreach my $f ( keys %$hash ) { |
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# warn "+++ $f ", dump( $hash->{$f} ),"\n"; |
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$ds->{$f} = $hash->{$f}; |
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} |
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# warn "### set_ds mungle_ds = ",dump($ds); |
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} |
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eval "$rules"; |
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$log->logdie("mungle rules $path error: $@") if $@; |
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|
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# warn "### set_ds after mungle_rules ds = ",dump($ds); |
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} else { |
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|
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$ds = $xml; |
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|
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} |
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# add mfn |
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$ds->{'000'} = [ $mfn ]; |
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|
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return $ds; |
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} |
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|
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|
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=head2 size |
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|
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Return number of records in database |
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|
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my $size = $input->size; |
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|
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=cut |
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|
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sub size { |
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my $self = shift; |
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return $#{$self->{_files}} + 1; |
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} |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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