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 'ARRAY') {
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36 | my $mm_files = $mm_file_or_files;
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37 |
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38 | # Need to process files in reverse order. This is so in the
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39 | # case where we have both a "collect" and "main" version,
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40 | # the "collect" one tops up the main one
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41 |
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42 | my $mm_file;
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43 | while ($mm_file = pop(@$mm_files)) {
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44 | &_parse_marc_metadata_mapping($mm_file,$metadata_mapping, $outhandle);
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45 | }
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46 | }
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47 | else {
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48 | my $mm_file = $mm_file_or_files;
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49 | &_parse_marc_metadata_mapping($mm_file,$metadata_mapping, $outhandle);
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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 " $line\n";
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82 | }
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83 | }
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84 | elsif ($line =~ m/^(.*?)->\s*([\w\.\^]+)$/)
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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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