1 # this filter is used to find narrower terms in thesaurus which has
2 # only broader terms defined
4 # it's general purpose memory lookup filter actually with following
7 # prefix syntax before key value is arbitrary. I use here "d" to denote
8 # display value and "a" to denote array (although they are stored the
9 # same: as array with one or more elements)
12 # key: d900, val: 250 (what to display)
13 # <isis filter="mem_lookup">d900 => 250</isis>
14 # key: a4611, val: 900 (parent fields has childs)
15 # <isis filter="mem_lookup">a4611 => 900</isis>
18 # key: a900 (lookup array, delimited by delimiters in one line)
19 # <isis filter="mem_lookup" type="display">[a900]</isis>
21 # - each key can have more than one value
22 # - storing something into lookup WON'T return any value to
23 # indexer, so it's save to leave type="" undefiend
24 # - lookup will (of course) return one or more values
29 if (/^(.+)\s=>\s(.+)$/) {
31 # store in array if it doesn't exist
32 if (! grep(/^$v$/, @{$main::cache->{mem_lookup}->{$k}})) {
33 push @{$main::cache->{mem_lookup}->{$k}}, $v;
34 #print STDERR "## mem_lookup store: $k => $v [",join("|",@{$main::cache->{mem_lookup}->{$k}}),"]\n";
36 } elsif (/\[[^\[\]]+\]/) {
37 # lookup [key] recursivly
39 #print STDERR "mem_lookup: $_\n";
40 while (my $f = shift @in) {
41 if ($f =~ /\[([^\[\]]+)\]/) {
43 if ($main::cache->{mem_lookup}->{$k}) {
44 #print STDERR "mem_lookup key: $k = ";
45 foreach my $nv (@{$main::cache->{mem_lookup}->{$k}}) {
46 #print STDERR "\t$nv\n";
48 $tmp =~ s/\[$k\]/$nv/g;
60 #warn "mem_lookup: invalid filter specification: '$_'";
63 #print STDERR "mem_lookup dump: ",Dumper($main::cache->{mem_lookup}),"\n";
64 #print STDERR "out: ".Dumper(@out)."\n" if (@out);