[16692] | 1 | ###########################################################################
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| 2 | #
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| 3 | # marcmapping.pm -- code to read in the marc mapping files
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 2008 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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| 27 | package marcmapping;
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| 28 |
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| 29 | sub parse_marc_metadata_mapping
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| 30 | {
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| 31 | my ($mm_file_or_files, $outhandle) = @_;
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| 32 |
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| 33 | my $metadata_mapping = {};
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| 34 |
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| 35 | if (ref ($mm_file_or_files) eq 'SCALAR') {
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| 36 | my $mm_file = $mm_file_or_files;
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| 37 | &_parse_marc_metadata_mapping($mm_file,$metadata_mapping, $outhandle);
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| 38 | }
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| 39 | else {
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| 40 | my $mm_files = $mm_file_or_files;
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| 41 |
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| 42 | # Need to process files in reverse order. This is so in the
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| 43 | # case where we have both a "collect" and "main" version,
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| 44 | # the "collect" one tops up the main one
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| 45 |
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| 46 | my $mm_file;
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| 47 | while ($mm_file = pop(@$mm_files)) {
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| 48 | &_parse_marc_metadata_mapping($mm_file,$metadata_mapping, $outhandle);
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| 49 | }
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| 50 | }
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| 51 |
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| 52 | return $metadata_mapping;
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| 53 | }
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| 54 |
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| 55 | sub _parse_marc_metadata_mapping
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| 56 | {
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| 57 | my ($mm_file,$metadata_mapping, $outhandle) = @_;
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| 58 |
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| 59 | if (open(MMIN, "<$mm_file"))
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| 60 | {
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| 61 | my $l=0;
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| 62 | my $line;
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| 63 | while (defined($line=<MMIN>))
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| 64 | {
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| 65 | $l++;
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| 66 | chomp $line;
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| 67 | $line =~ s/#.*$//; # strip out any comments, including end of line
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| 68 | next if ($line =~ m/^\s*$/);
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| 69 | $line =~ s/\s+$//; # remove any white space at end of line
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| 70 |
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| 71 | my $parse_error_count = 0;
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| 72 | if ($line =~ m/^-(\d+)\s*$/) {
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| 73 | # special "remove" rule syntax
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| 74 | my $marc_info = $1;
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| 75 | if (defined $metadata_mapping->{$marc_info}) {
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| 76 | delete $metadata_mapping->{$marc_info};
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| 77 | }
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| 78 | else {
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| 79 | print $outhandle "Parse Warning: Did not find pre-existing rule $marc_info to remove";
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| 80 | print $outhandle " on line $l of $mm_file:\n";
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| 81 | print $outhandle " $line\n";
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| 82 | }
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| 83 | }
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[18200] | 84 | elsif ($line =~ m/^(.*?)->\s*([\w\.\^]+)$/)
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[16692] | 85 | {
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| 86 | my $lhs = $1;
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| 87 | my $gsdl_info = $2;
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| 88 |
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| 89 | my @fields = split(/,\s*/,$lhs);
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| 90 | my $f;
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| 91 | while ($f = shift (@fields)) {
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| 92 | $f =~ s/\s+$//; # remove any white space at end of line
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| 93 |
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| 94 | if ($f =~ m/^(\d+)\-(\d+)$/) {
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| 95 | # number range => generate number in range and
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| 96 | # push on to array
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| 97 | push(@fields,$1..$2);
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| 98 | next;
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| 99 | }
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| 100 |
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| 101 | if ($f =~ m/^(\d+)((?:(?:\$|\^)\w)*)\s*$/) {
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| 102 |
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| 103 | my $marc_info = $1;
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| 104 | my $opt_sub_fields = $2;
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| 105 |
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| 106 | if ($opt_sub_fields ne "") {
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| 107 | my @sub_fields = split(/\$|\^/,$opt_sub_fields);
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| 108 | shift @sub_fields; # skip first entry, which is blank
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| 109 |
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| 110 | foreach my $sub_field (@sub_fields) {
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| 111 | $metadata_mapping->{$marc_info."\$".$sub_field} = $gsdl_info;
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| 112 | }
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| 113 | }
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| 114 | else {
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| 115 | # no subfields to worry about
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| 116 | $marc_info =~ s/\^/\$/;
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| 117 | $metadata_mapping->{$marc_info} = $gsdl_info;
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| 118 | }
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| 119 | }
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| 120 | else {
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| 121 | $parse_error_count++;
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| 122 | }
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| 123 | }
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| 124 | }
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| 125 | else
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| 126 | {
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| 127 | $parse_error_count++;
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| 128 | }
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| 129 |
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| 130 | if ($parse_error_count>0) {
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| 131 |
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| 132 | print $outhandle "Parse Error: $parse_error_count syntax error(s) on line $l of $mm_file:\n";
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| 133 | print $outhandle " $line\n";
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| 134 | }
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| 135 | }
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| 136 | close(MMIN);
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| 137 | }
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| 138 | else
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| 139 | {
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| 140 | print $outhandle "Unable to open $mm_file: $!\n";
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| 141 | }
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| 142 | }
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| 143 |
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| 144 |
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| 145 |
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| 146 | 1;
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