/usr/lib/perl5/KinoSearch1/Index/SegReader.pm is in libkinosearch1-perl 1.00-1build3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 | package KinoSearch1::Index::SegReader;
use strict;
use warnings;
use KinoSearch1::Util::ToolSet;
use base qw( KinoSearch1::Index::IndexReader );
BEGIN {
__PACKAGE__->init_instance_vars(
# params/members
invindex => undef,
seg_name => undef,
# members
comp_file_reader => undef,
tinfos_reader => undef,
finfos => undef,
fields_reader => undef,
freq_stream => undef,
prox_stream => undef,
deldocs => undef,
norms_readers => undef,
);
__PACKAGE__->ready_get(
qw(
finfos
fields_reader
freq_stream
prox_stream
deldocs
seg_name
)
);
}
use KinoSearch1::Index::CompoundFileReader;
use KinoSearch1::Index::TermInfosReader;
use KinoSearch1::Index::FieldsReader;
use KinoSearch1::Index::FieldInfos;
use KinoSearch1::Index::NormsReader;
use KinoSearch1::Index::SegTermDocs;
use KinoSearch1::Index::DelDocs;
# use KinoSearch1::Util::Class's new()
# Note: can't inherit IndexReader's new() without recursion problems
*new = *KinoSearch1::Util::Class::new;
sub init_instance {
my $self = shift;
my ( $seg_name, $invindex ) = @{$self}{ 'seg_name', 'invindex' };
$self->{norms_readers} = {};
# initialize DelDocs
$self->{deldocs} = KinoSearch1::Index::DelDocs->new(
invindex => $invindex,
seg_name => $seg_name,
);
$self->{deldocs}->read_deldocs( $invindex, "$seg_name.del" )
if ( $invindex->file_exists("$seg_name.del") );
# initialize a CompoundFileReader
my $comp_file_reader = $self->{comp_file_reader}
= KinoSearch1::Index::CompoundFileReader->new(
invindex => $invindex,
seg_name => $seg_name,
);
# initialize FieldInfos
my $finfos = $self->{finfos} = KinoSearch1::Index::FieldInfos->new;
$finfos->read_infos( $comp_file_reader->open_instream("$seg_name.fnm") );
# initialize FieldsReader
$self->{fields_reader} = KinoSearch1::Index::FieldsReader->new(
finfos => $finfos,
fdata_stream => $comp_file_reader->open_instream("$seg_name.fdt"),
findex_stream => $comp_file_reader->open_instream("$seg_name.fdx"),
);
# initialize TermInfosReader
$self->{tinfos_reader} = KinoSearch1::Index::TermInfosReader->new(
invindex => $comp_file_reader,
seg_name => $seg_name,
finfos => $finfos,
);
# open the frequency data, the positional data, and the norms
$self->{freq_stream} = $comp_file_reader->open_instream("$seg_name.frq");
$self->{prox_stream} = $comp_file_reader->open_instream("$seg_name.prx");
$self->_open_norms;
}
sub max_doc { shift->{fields_reader}->get_size }
sub num_docs {
my $self = shift;
return $self->max_doc - $self->{deldocs}->get_num_deletions;
}
sub delete_docs_by_term {
my ( $self, $term ) = @_;
my $term_docs = $self->term_docs($term);
$self->{deldocs}->delete_by_term_docs($term_docs);
}
sub commit_deletions {
my $self = shift;
return unless $self->{deldocs}->get_num_deletions;
my $filename = $self->{seg_name} . ".del";
$self->{deldocs}
->write_deldocs( $self->{invindex}, $filename, $self->max_doc );
}
sub has_deletions { shift->{deldocs}->get_num_deletions }
sub _open_norms {
my $self = shift;
my ( $seg_name, $finfos, $comp_file_reader )
= @{$self}{ 'seg_name', 'finfos', 'comp_file_reader' };
my $max_doc = $self->max_doc;
# create a NormsReader for each indexed field.
for my $finfo ( $finfos->get_infos ) {
next unless $finfo->get_indexed;
my $filename = "$seg_name.f" . $finfo->get_field_num;
my $instream = $comp_file_reader->open_instream($filename);
$self->{norms_readers}{ $finfo->get_name }
= KinoSearch1::Index::NormsReader->new(
instream => $instream,
max_doc => $max_doc,
);
}
}
sub terms {
my ( $self, $term ) = @_;
return $self->{tinfos_reader}->terms($term);
}
sub fetch_term_info {
my ( $self, $term ) = @_;
return $self->{tinfos_reader}->fetch_term_info($term);
}
sub get_skip_interval {
shift->{tinfos_reader}->get_skip_interval;
}
sub doc_freq {
my ( $self, $term ) = @_;
my $tinfo = $self->{tinfos_reader}->fetch_term_info($term);
return defined $tinfo ? $tinfo->get_doc_freq : 0;
}
sub term_docs {
my ( $self, $term ) = @_;
my $term_docs = KinoSearch1::Index::SegTermDocs->new( reader => $self, );
$term_docs->seek($term);
return $term_docs;
}
sub norms_reader {
my ( $self, $field_name ) = @_;
return unless exists $self->{norms_readers}{$field_name};
return $self->{norms_readers}{$field_name};
}
sub get_field_names {
my ( $self, %args ) = @_;
my @fields = $self->{finfos}->get_infos;
@fields = grep { $_->get_indexed } @fields
if $args{indexed};
my @names = map { $_->get_name } @fields;
return \@names;
}
sub generate_field_infos {
my $self = shift;
my $new_finfos = $self->{finfos}->clone;
$new_finfos->set_from_file(0);
return $new_finfos;
}
sub fetch_doc {
$_[0]->{fields_reader}->fetch_doc( $_[1] );
}
sub segreaders_to_merge {
my ( $self, $all ) = @_;
return $self if $all;
return;
}
sub close {
my $self = shift;
return unless $self->{close_invindex};
$self->{deldocs}->close;
$self->{finfos}->close;
$self->{fields_reader}->close;
$self->{tinfos_reader}->close;
$self->{comp_file_reader}->close;
$self->{freq_stream}->close;
$self->{prox_stream}->close;
$_->close for values %{ $self->{norms_readers} };
}
1;
__END__
=begin devdocs
=head1 NAME
KinoSearch1::Index::SegReader - read from a single-segment invindex
=head1 DESCRIPTION
Single-segment implementation of IndexReader.
=head1 COPYRIGHT
Copyright 2005-2010 Marvin Humphrey
=head1 LICENSE, DISCLAIMER, BUGS, etc.
See L<KinoSearch1> version 1.00.
=end devdocs
=cut
|