1 | ###########################################################################
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2 | #
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3 | # AZSectionList.pm --
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 1999 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | # classifier plugin for sorting sections alphabetically
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27 |
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28 | # this is very similar to AZList except it sorts by
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29 | # section level metadata (excluding the top level)
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30 | # instead of just top level metadata
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31 |
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32 | # the only change is to the classify() subroutine which
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33 | # must now iterate through each section, adding each
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34 | # to the classification
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35 |
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36 | package AZSectionList;
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37 |
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38 | use AZList;
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39 | use sorttools;
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40 |
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41 | sub BEGIN {
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42 | @ISA = ('AZList');
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43 | }
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44 |
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45 | sub classify {
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46 | my $self = shift (@_);
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47 | my ($doc_obj) = @_;
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48 |
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49 | my $doc_OID = $doc_obj->get_OID();
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50 | my $thissection = $doc_obj->get_next_section ($doc_obj->get_top_section());
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51 |
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52 | while (defined $thissection) {
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53 | $self->classify_section ($thissection, $doc_obj);
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54 | $thissection = $doc_obj->get_next_section ($thissection);
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55 | }
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56 | }
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57 |
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58 | sub classify_section {
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59 | my $self = shift (@_);
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60 | my ($section, $doc_obj) = @_;
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61 |
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62 | my $doc_OID = $doc_obj->get_OID();
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63 | my $metavalue = $doc_obj->get_metadata_element ($section, $self->{'metaname'});
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64 |
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65 | # if this section doesn't contain the metadata element we're
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66 | # sorting by we won't include it in this classification
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67 | if (defined $metavalue && $metavalue ne "") {
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68 | if ($self->{'metaname'} eq 'Creator') {
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69 | &sorttools::format_string_name_english (\$metavalue);
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70 | } else {
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71 | &sorttools::format_string_english (\$metavalue);
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72 | }
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73 | if (defined $self->{'list'}->{"$doc_OID.$section"}) {
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74 | print STDERR "WARNING: AZSectionList::classify called multiple times " .
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75 | "for $doc_OID.$section\n";
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76 | }
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77 | $self->{'list'}->{"$doc_OID.$section"} = $metavalue;
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78 | }
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79 | }
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80 |
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81 |
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82 | 1;
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