| 1 |
package jsFind; |
| 2 |
|
| 3 |
use 5.008004; |
| 4 |
use strict; |
| 5 |
use warnings; |
| 6 |
use HTML::Entities; |
| 7 |
|
| 8 |
our $VERSION = '0.03'; |
| 9 |
|
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=head1 NAME |
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|
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jsFind - generate index for jsFind using B-Tree |
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|
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=head1 SYNOPSIS |
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|
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use jsFind; |
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|
| 18 |
|
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|
| 20 |
=head1 DESCRIPTION |
| 21 |
|
| 22 |
This module can be used to create index files for jsFind, powerful tool for |
| 23 |
adding a search engine to a CDROM archive or catalog without requiring the |
| 24 |
user to install anything. |
| 25 |
|
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Main difference between this module and scripts delivered with jsFind are: |
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|
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=over 5 |
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|
| 30 |
=item * |
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|
| 32 |
You don't need to use swish-e to create index |
| 33 |
|
| 34 |
=item * |
| 35 |
|
| 36 |
You can programatically (and incrementaly) create index for jsFind |
| 37 |
|
| 38 |
=back |
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|
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=head1 METHODS |
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|
| 42 |
This module contains two packages C<jsFind> and C<jsFind::Node>. |
| 43 |
|
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=head2 jsFind methods |
| 45 |
|
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=cut |
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|
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use Exporter 'import'; |
| 49 |
use Carp; |
| 50 |
|
| 51 |
our @ISA = qw(Exporter); |
| 52 |
|
| 53 |
BEGIN { |
| 54 |
import 'jsFind::Node'; |
| 55 |
} |
| 56 |
|
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=head3 new |
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|
| 59 |
Create new tree. Arguments are C<B> which is maximum numbers of keys in |
| 60 |
each node and optional C<Root> node. Each root node may have child nodes. |
| 61 |
|
| 62 |
All nodes are objects from C<jsFind::Node>. |
| 63 |
|
| 64 |
my $t = new jsFind(B => 4); |
| 65 |
|
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=cut |
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|
| 68 |
my $DEBUG = 1; |
| 69 |
|
| 70 |
sub new { |
| 71 |
my $package = shift; |
| 72 |
my %ARGV = @_; |
| 73 |
croak "Usage: {$package}::new(B => number [, Root => root node ])" |
| 74 |
unless exists $ARGV{B}; |
| 75 |
if ($ARGV{B} % 2) { |
| 76 |
my $B = $ARGV{B} + 1; |
| 77 |
carp "B must be an even number. Using $B instead."; |
| 78 |
$ARGV{B} = $B; |
| 79 |
} |
| 80 |
|
| 81 |
my $B = $ARGV{B}; |
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my $Root = exists($ARGV{Root}) ? $ARGV{Root} : jsFind::Node->emptynode; |
| 83 |
bless { B => $B, Root => $Root } => $package; |
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} |
| 85 |
|
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=head3 B_search |
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|
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Search, insert, append or replace data in B-Tree |
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|
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$t->B_search( |
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Key => 'key value', |
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Data => { "path" => { |
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"t" => "title of document", |
| 94 |
"f" => 99, |
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}, |
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}, |
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Insert => 1, |
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Append => 1, |
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); |
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|
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Semantics: |
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|
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If key not found, insert it iff C<Insert> argument is present. |
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|
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If key B<is> found, replace existing data iff C<Replace> argument |
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is present or add new datum to existing iff C<Append> argument is present. |
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|
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=cut |
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|
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sub B_search { |
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my $self = shift; |
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my %args = @_; |
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my $cur_node = $self->root; |
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my $k = $args{Key}; |
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my $d = $args{Data}; |
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my @path; |
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|
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if ($cur_node->is_empty) { # Special case for empty root |
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if ($args{Insert}) { |
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$cur_node->kdp_insert($k => $d); |
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return $d; |
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} else { |
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return undef; |
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} |
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} |
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|
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# Descend tree to leaf |
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for (;;) { |
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|
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# Didn't hit bottom yet. |
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|
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my($there, $where) = $cur_node->locate_key($k); |
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if ($there) { # Found it! |
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if ($args{Replace}) { |
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$cur_node->kdp_replace($where, $k => $d); |
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} elsif ($args{Append}) { |
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$cur_node->kdp_append($where, $k => $d); |
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} |
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return $cur_node->data($where); |
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} |
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|
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# Not here---must be in a subtree. |
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|
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if ($cur_node->is_leaf) { # But there are no subtrees |
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return undef unless $args{Insert}; # Search failed |
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# Stuff it in |
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$cur_node->kdp_insert($k => $d); |
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if ($self->node_overfull($cur_node)) { # Oops--there was no room. |
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$self->split_and_promote($cur_node, @path); |
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} |
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return $d; |
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} |
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|
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# There are subtrees, and the key is in one of them. |
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|
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push @path, [$cur_node, $where]; # Record path from root. |
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|
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# Move down to search the subtree |
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$cur_node = $cur_node->subnode($where); |
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|
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# and start over. |
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} # for (;;) ... |
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|
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croak ("How did I get here?"); |
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} |
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|
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|
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|
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sub split_and_promote_old { |
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my $self = shift; |
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my ($cur_node, @path) = @_; |
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|
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for (;;) { |
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my ($newleft, $newright, $kdp) = $cur_node->halves($self->B / 2); |
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my ($up, $where) = @{pop @path}; |
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if ($up) { |
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$up->kdp_insert(@$kdp); |
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my ($tthere, $twhere) = $up->locate_key($kdp->[0]); |
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croak "Couldn't find key `$kdp->[0]' in node after just inserting it!" |
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unless $tthere; |
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croak "`$kdp->[0]' went into node at `$twhere' instead of expected `$where'!" |
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unless $twhere == $where; |
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$up->subnode($where, $newleft); |
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$up->subnode($where+1, $newright); |
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return unless $self->node_overfull($up); |
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$cur_node = $up; |
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} else { # We're at the top; make a new root. |
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my $newroot = new jsFind::Node ([$kdp->[0]], |
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[$kdp->[1]], |
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[$newleft, $newright]); |
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$self->root($newroot); |
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return; |
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} |
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} |
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|
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} |
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|
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sub split_and_promote { |
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my $self = shift; |
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my ($cur_node, @path) = @_; |
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|
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for (;;) { |
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my ($newleft, $newright, $kdp) = $cur_node->halves($self->B / 2); |
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my ($up, $where) = @{pop @path} if (@path); |
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if ($up) { |
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$up->kdp_insert(@$kdp); |
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if ($DEBUG) { |
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my ($tthere, $twhere) = $up->locate_key($kdp->[0]); |
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croak "Couldn't find key `$kdp->[0]' in node after just inserting it!" |
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unless $tthere; |
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croak "`$kdp->[0]' went into node at `$twhere' instead of expected `$where'!" |
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unless $twhere == $where; |
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} |
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$up->subnode($where, $newleft); |
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$up->subnode($where+1, $newright); |
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return unless $self->node_overfull($up); |
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$cur_node = $up; |
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} else { # We're at the top; make a new root. |
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my $newroot = new jsFind::Node([$kdp->[0]], |
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[$kdp->[1]], |
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[$newleft, $newright]); |
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$self->root($newroot); |
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return; |
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} |
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} |
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} |
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|
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=head3 B |
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|
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Return B (maximum number of keys) |
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|
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my $max_size = $t->B; |
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|
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=cut |
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|
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sub B { |
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$_[0]{B}; |
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} |
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|
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=head3 root |
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|
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Returns root node |
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|
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my $root = $t->root; |
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|
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=cut |
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|
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sub root { |
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my ($self, $newroot) = @_; |
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$self->{Root} = $newroot if defined $newroot; |
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$self->{Root}; |
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} |
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|
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=head3 node_overfull |
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|
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Returns if node is overfull |
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|
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if ($node->node_overfull) { something } |
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|
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=cut |
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|
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sub node_overfull { |
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my $self = shift; |
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my $node = shift; |
| 265 |
$node->size > $self->B; |
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} |
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|
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=head3 to_string |
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|
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Returns your tree as formatted string. |
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|
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my $text = $root->to_string; |
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|
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Mostly usefull for debugging as output leaves much to be desired. |
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|
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=cut |
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|
| 278 |
sub to_string { |
| 279 |
$_[0]->root->to_string; |
| 280 |
} |
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|
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=head3 to_dot |
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|
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Create Graphviz graph of your tree |
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|
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my $dot_graph = $root->to_dot; |
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|
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=cut |
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|
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sub to_dot { |
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my $self = shift; |
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|
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my $dot = qq/digraph dns {\nrankdir=LR;\n/; |
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$dot .= $self->root->to_dot; |
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$dot .= qq/\n}\n/; |
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|
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return $dot; |
| 298 |
} |
| 299 |
|
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=head3 to_jsfind |
| 301 |
|
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Create xml index files for jsFind. This should be called after |
| 303 |
your B-Tree has been filled with data. |
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|
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$root->to_jsfind('/full/path/to/index/dir/'); |
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|
| 307 |
Returns number of nodes in created tree. |
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|
| 309 |
There is also longer version if you want to recode your data charset |
| 310 |
into different one (probably UTF-8): |
| 311 |
|
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$root->to_jsfind('/full/path/to/index/dir/','ISO-8859-2','UTF-8'); |
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|
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Destination encoding is UTF-8 by default, so you don't have to specify it. |
| 315 |
|
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$root->to_jsfind('/full/path/to/index/dir/','WINDOWS-1250'); |
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|
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=cut |
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|
| 320 |
my $iconv; |
| 321 |
my $iconv_l1; |
| 322 |
|
| 323 |
sub to_jsfind { |
| 324 |
my $self = shift; |
| 325 |
|
| 326 |
my $path = shift || confess "to_jsfind need path to your index!"; |
| 327 |
|
| 328 |
my ($from_cp,$to_cp) = @_; |
| 329 |
|
| 330 |
$to_cp ||= 'UTF-8'; |
| 331 |
|
| 332 |
if ($from_cp && $to_cp) { |
| 333 |
$iconv = Text::Iconv->new($from_cp,$to_cp); |
| 334 |
} |
| 335 |
$iconv_l1 = Text::Iconv->new('ISO-8859-1',$to_cp); |
| 336 |
|
| 337 |
$path .= "/" if ($path =~ /\/$/); |
| 338 |
#carp "creating directory for index '$path'" if (! -w $path); |
| 339 |
|
| 340 |
return $self->root->to_jsfind($path,"0"); |
| 341 |
} |
| 342 |
|
| 343 |
|
| 344 |
# private, default cmd function |
| 345 |
sub default_cmp { |
| 346 |
$_[0] cmp $_[1]; |
| 347 |
} |
| 348 |
|
| 349 |
=head3 _recode |
| 350 |
|
| 351 |
This is internal function to recode charset. |
| 352 |
|
| 353 |
It will also try to decode HTML::Entities in data. |
| 354 |
|
| 355 |
=cut |
| 356 |
|
| 357 |
sub _recode { |
| 358 |
my $self = shift; |
| 359 |
my $text = shift || return; |
| 360 |
|
| 361 |
sub _decode_html_entities { |
| 362 |
my $data = shift || return; |
| 363 |
$data = $iconv_l1->convert(decode_entities($data)) || croak "entity decode problem: $data"; |
| 364 |
} |
| 365 |
|
| 366 |
if ($iconv) { |
| 367 |
$text = $iconv->convert($text) || $text && carp "convert problem: $text"; |
| 368 |
$text =~ s/(\&\w+;)/_decode_html_entities($1)/ges; |
| 369 |
} |
| 370 |
|
| 371 |
return $text; |
| 372 |
} |
| 373 |
|
| 374 |
##################################################################### |
| 375 |
|
| 376 |
=head2 jsFind::Node methods |
| 377 |
|
| 378 |
Each node has C<k> key-data pairs, with C<B> <= C<k> <= C<2B>, and |
| 379 |
each has C<k+1> subnodes, which might be null. |
| 380 |
|
| 381 |
The node is a blessed reference to a list with three elements: |
| 382 |
|
| 383 |
($keylist, $datalist, $subnodelist) |
| 384 |
|
| 385 |
each is a reference to a list list. |
| 386 |
|
| 387 |
The null node is represented by a blessed reference to an empty list. |
| 388 |
|
| 389 |
=cut |
| 390 |
|
| 391 |
package jsFind::Node; |
| 392 |
|
| 393 |
use warnings; |
| 394 |
use strict; |
| 395 |
|
| 396 |
use Carp; |
| 397 |
use File::Path; |
| 398 |
use Text::Iconv; |
| 399 |
|
| 400 |
use base 'jsFind'; |
| 401 |
|
| 402 |
my $KEYS = 0; |
| 403 |
my $DATA = 1; |
| 404 |
my $SUBNODES = 2; |
| 405 |
|
| 406 |
=head3 new |
| 407 |
|
| 408 |
Create New node |
| 409 |
|
| 410 |
my $node = new jsFind::Node ($keylist, $datalist, $subnodelist); |
| 411 |
|
| 412 |
You can also mit argument list to create empty node. |
| 413 |
|
| 414 |
my $empty_node = new jsFind::Node; |
| 415 |
|
| 416 |
=cut |
| 417 |
|
| 418 |
sub new { |
| 419 |
my $self = shift; |
| 420 |
my $package = ref $self || $self; |
| 421 |
croak "Internal error: jsFind::Node::new called with wrong number of arguments." |
| 422 |
unless @_ == 3 || @_ == 0; |
| 423 |
bless [@_] => $package; |
| 424 |
} |
| 425 |
|
| 426 |
=head3 locate_key |
| 427 |
|
| 428 |
Locate key in node using linear search. This should probably be replaced |
| 429 |
by binary search for better performance. |
| 430 |
|
| 431 |
my ($found, $index) = $node->locate_key($key, $cmp_coderef); |
| 432 |
|
| 433 |
Argument C<$cmp_coderef> is optional reference to custom comparison |
| 434 |
operator. |
| 435 |
|
| 436 |
Returns (1, $index) if $key[$index] eq $key. |
| 437 |
|
| 438 |
Returns (0, $index) if key could be found in $subnode[$index]. |
| 439 |
|
| 440 |
In scalar context, just returns 1 or 0. |
| 441 |
|
| 442 |
=cut |
| 443 |
|
| 444 |
sub locate_key { |
| 445 |
# Use linear search for testing, replace with binary search. |
| 446 |
my $self = shift; |
| 447 |
my $key = shift; |
| 448 |
my $cmp = shift || \&jsFind::default_cmp; |
| 449 |
my $i; |
| 450 |
my $cmp_result; |
| 451 |
my $N = $self->size; |
| 452 |
for ($i = 0; $i < $N; $i++) { |
| 453 |
$cmp_result = &$cmp($key, $self->key($i)); |
| 454 |
last if $cmp_result <= 0; |
| 455 |
} |
| 456 |
|
| 457 |
# $i is now the index of the first node-key greater than $key |
| 458 |
# or $N if there is no such. $cmp_result is 0 iff the key was found. |
| 459 |
(!$cmp_result, $i); |
| 460 |
} |
| 461 |
|
| 462 |
|
| 463 |
=head3 emptynode |
| 464 |
|
| 465 |
Creates new empty node |
| 466 |
|
| 467 |
$node = $root->emptynode; |
| 468 |
$new_node = $node->emptynode; |
| 469 |
|
| 470 |
=cut |
| 471 |
|
| 472 |
sub emptynode { |
| 473 |
new($_[0]); # Pass package name, but not anything else. |
| 474 |
} |
| 475 |
|
| 476 |
=head3 is_empty |
| 477 |
|
| 478 |
Test if node is empty |
| 479 |
|
| 480 |
if ($node->is_empty) { something } |
| 481 |
|
| 482 |
=cut |
| 483 |
|
| 484 |
# undef is empty; so is a blessed empty list. |
| 485 |
sub is_empty { |
| 486 |
my $self = shift; |
| 487 |
!defined($self) || $#$self < 0; |
| 488 |
} |
| 489 |
|
| 490 |
=head3 key |
| 491 |
|
| 492 |
Return C<$i>th key from node |
| 493 |
|
| 494 |
my $key = $node->key($i); |
| 495 |
|
| 496 |
=cut |
| 497 |
|
| 498 |
sub key { |
| 499 |
# my ($self, $n) = @_; |
| 500 |
# $self->[$KEYS][$n]; |
| 501 |
|
| 502 |
# speedup |
| 503 |
$_[0]->[$KEYS][$_[1]]; |
| 504 |
} |
| 505 |
|
| 506 |
=head3 data |
| 507 |
|
| 508 |
Return C<$i>th data from node |
| 509 |
|
| 510 |
my $data = $node->data($i); |
| 511 |
|
| 512 |
=cut |
| 513 |
|
| 514 |
sub data { |
| 515 |
my ($self, $n) = @_; |
| 516 |
$self->[$DATA][$n]; |
| 517 |
} |
| 518 |
|
| 519 |
=head3 kdp_replace |
| 520 |
|
| 521 |
Set key data pair for C<$i>th element in node |
| 522 |
|
| 523 |
$node->kdp_replace($i, "key value" => { |
| 524 |
"data key 1" => "data value 1", |
| 525 |
"data key 2" => "data value 2", |
| 526 |
}; |
| 527 |
|
| 528 |
=cut |
| 529 |
|
| 530 |
sub kdp_replace { |
| 531 |
my ($self, $n, $k => $d) = @_; |
| 532 |
if (defined $k) { |
| 533 |
$self->[$KEYS][$n] = $k; |
| 534 |
$self->[$DATA][$n] = $d; |
| 535 |
} |
| 536 |
[$self->[$KEYS][$n], |
| 537 |
$self->[$DATA][$n]]; |
| 538 |
} |
| 539 |
|
| 540 |
=head3 kdp_insert |
| 541 |
|
| 542 |
# No return value. |
| 543 |
|
| 544 |
=cut |
| 545 |
|
| 546 |
sub kdp_insert { |
| 547 |
my $self = shift; |
| 548 |
my ($k => $d) = @_; |
| 549 |
my ($there, $where) = $self->locate_key($k) unless $self->is_empty; |
| 550 |
|
| 551 |
if ($there) { croak("Tried to insert `$k => $d' into node where `$k' was already present."); } |
| 552 |
|
| 553 |
# undef fix |
| 554 |
$where ||= 0; |
| 555 |
|
| 556 |
splice(@{$self->[$KEYS]}, $where, 0, $k); |
| 557 |
splice(@{$self->[$DATA]}, $where, 0, $d); |
| 558 |
splice(@{$self->[$SUBNODES]}, $where, 0, undef); |
| 559 |
} |
| 560 |
|
| 561 |
=head3 kdp_append |
| 562 |
|
| 563 |
Adds new data keys and values to C<$i>th element in node |
| 564 |
|
| 565 |
$node->kdp_append($i, "key value" => { |
| 566 |
"added data key" => "added data value", |
| 567 |
}; |
| 568 |
|
| 569 |
=cut |
| 570 |
|
| 571 |
sub kdp_append { |
| 572 |
my ($self, $n, $k => $d) = @_; |
| 573 |
if (defined $k) { |
| 574 |
$self->[$KEYS][$n] = $k; |
| 575 |
my ($kv,$dv) = %{$d}; |
| 576 |
$self->[$DATA][$n]->{$kv} = $dv; |
| 577 |
} |
| 578 |
[$self->[$KEYS][$n], |
| 579 |
$self->[$DATA][$n]]; |
| 580 |
} |
| 581 |
|
| 582 |
=head3 subnode |
| 583 |
|
| 584 |
Set new or return existing subnode |
| 585 |
|
| 586 |
# return 4th subnode |
| 587 |
my $my_node = $node->subnode(4); |
| 588 |
|
| 589 |
# create new subnode 5 from $my_node |
| 590 |
$node->subnode(5, $my_node); |
| 591 |
|
| 592 |
=cut |
| 593 |
|
| 594 |
sub subnode { |
| 595 |
my ($self, $n, $newnode) = @_; |
| 596 |
$self->[$SUBNODES][$n] = $newnode if defined $newnode; |
| 597 |
$self->[$SUBNODES][$n]; |
| 598 |
} |
| 599 |
|
| 600 |
=head3 is_leaf |
| 601 |
|
| 602 |
Test if node is leaf |
| 603 |
|
| 604 |
if ($node->is_leaf) { something } |
| 605 |
|
| 606 |
=cut |
| 607 |
|
| 608 |
sub is_leaf { |
| 609 |
my $self = shift; |
| 610 |
! defined $self->[$SUBNODES][0]; # undefined subnode means leaf node. |
| 611 |
} |
| 612 |
|
| 613 |
=head3 size |
| 614 |
|
| 615 |
Return number of keys in the node |
| 616 |
|
| 617 |
my $nr = $node->size; |
| 618 |
|
| 619 |
=cut |
| 620 |
|
| 621 |
sub size { |
| 622 |
my $self = shift; |
| 623 |
return scalar(@{$self->[$KEYS]}); |
| 624 |
} |
| 625 |
|
| 626 |
=head3 halves |
| 627 |
|
| 628 |
# Accept an index $n |
| 629 |
# Divide into two nodes so that keys 0 .. $n-1 are in one node |
| 630 |
# and keys $n+1 ... $size are in the other. |
| 631 |
|
| 632 |
=cut |
| 633 |
|
| 634 |
sub halves { |
| 635 |
my $self = shift; |
| 636 |
my $n = shift; |
| 637 |
my $s = $self->size; |
| 638 |
my @right; |
| 639 |
my @left; |
| 640 |
|
| 641 |
$left[$KEYS] = [@{$self->[$KEYS]}[0 .. $n-1]]; |
| 642 |
$left[$DATA] = [@{$self->[$DATA]}[0 .. $n-1]]; |
| 643 |
$left[$SUBNODES] = [@{$self->[$SUBNODES]}[0 .. $n]]; |
| 644 |
|
| 645 |
$right[$KEYS] = [@{$self->[$KEYS]}[$n+1 .. $s-1]]; |
| 646 |
$right[$DATA] = [@{$self->[$DATA]}[$n+1 .. $s-1]]; |
| 647 |
$right[$SUBNODES] = [@{$self->[$SUBNODES]}[$n+1 .. $s]]; |
| 648 |
|
| 649 |
my @middle = ($self->[$KEYS][$n], $self->[$DATA][$n]); |
| 650 |
|
| 651 |
($self->new(@left), $self->new(@right), \@middle); |
| 652 |
} |
| 653 |
|
| 654 |
=head3 to_string |
| 655 |
|
| 656 |
Dumps tree as string |
| 657 |
|
| 658 |
my $str = $root->to_string; |
| 659 |
|
| 660 |
=cut |
| 661 |
|
| 662 |
sub to_string { |
| 663 |
my $self = shift; |
| 664 |
my $indent = shift || 0; |
| 665 |
my $I = ' ' x $indent; |
| 666 |
return '' if $self->is_empty; |
| 667 |
my ($k, $d, $s) = @$self; |
| 668 |
my $result = ''; |
| 669 |
$result .= defined($s->[0]) ? $s->[0]->to_string($indent+2) : ''; |
| 670 |
my $N = $self->size; |
| 671 |
my $i; |
| 672 |
for ($i = 0; $i < $N; $i++) { |
| 673 |
# $result .= $I . "$k->[$i] => $d->[$i]\n"; |
| 674 |
$result .= $I . "$k->[$i]\n"; |
| 675 |
$result .= defined($s->[$i+1]) ? $s->[$i+1]->to_string($indent+2) : ''; |
| 676 |
} |
| 677 |
$result; |
| 678 |
} |
| 679 |
|
| 680 |
=begin comment |
| 681 |
|
| 682 |
use Data::Dumper; |
| 683 |
|
| 684 |
sub to_string { |
| 685 |
my $self = shift; |
| 686 |
my $indent = shift || 0; |
| 687 |
my $path = shift || '0'; |
| 688 |
return '' if $self->is_empty; |
| 689 |
my ($k, $d, $s) = @$self; |
| 690 |
my $result = ''; |
| 691 |
$result .= defined($s->[0]) ? $s->[0]->to_string($indent+1,"$path/0") : ''; |
| 692 |
my $N = $self->size; |
| 693 |
for (my $i = 0; $i < $N; $i++) { |
| 694 |
my $dump = Dumper($d->[$i]); |
| 695 |
$dump =~ s/[\n\r\s]+/ /gs; |
| 696 |
$dump =~ s/\$VAR1\s*=\s*//; |
| 697 |
$result .= sprintf("%-5s [%2d] %2s: %s => %s\n", $path, $i, $indent, $k->[$i], $dump); |
| 698 |
$result .= defined($s->[$i+1]) ? $s->[$i+1]->to_string($indent+1,"$path/$i") : ''; |
| 699 |
} |
| 700 |
$result; |
| 701 |
} |
| 702 |
|
| 703 |
=end comment |
| 704 |
|
| 705 |
=head3 to_dot |
| 706 |
|
| 707 |
Recursivly walk nodes of tree |
| 708 |
|
| 709 |
=cut |
| 710 |
|
| 711 |
sub to_dot { |
| 712 |
my $self = shift; |
| 713 |
my $parent = shift; |
| 714 |
|
| 715 |
return '' if $self->is_empty; |
| 716 |
|
| 717 |
my $dot = ''; |
| 718 |
|
| 719 |
my ($k, $d, $s) = @$self; |
| 720 |
my $N = $self->size; |
| 721 |
|
| 722 |
my @dot_keys; |
| 723 |
|
| 724 |
my $node_name = $parent || '_'; |
| 725 |
$node_name =~ s/\W+//g; |
| 726 |
$node_name .= " [$N]"; |
| 727 |
|
| 728 |
for (my $i = 0; $i <= $N; $i++) { |
| 729 |
if (my $key = $k->[$i]) { |
| 730 |
push @dot_keys, qq{<$i>$key}; |
| 731 |
} |
| 732 |
$dot .= $s->[$i]->to_dot(qq{"$node_name":$i}) if ($s->[$i]); |
| 733 |
} |
| 734 |
push @dot_keys, qq{<$N>...} if (! $self->is_leaf); |
| 735 |
|
| 736 |
my $label = join("|",@dot_keys); |
| 737 |
$dot .= qq{"$node_name" [ shape=record, label="$label" ];\n}; |
| 738 |
|
| 739 |
$dot .= qq{$parent -> "$node_name";\n} if ($parent); |
| 740 |
|
| 741 |
$dot; |
| 742 |
} |
| 743 |
|
| 744 |
=head3 to_xml |
| 745 |
|
| 746 |
Escape <, >, & and ", and to produce valid XML |
| 747 |
|
| 748 |
=cut |
| 749 |
|
| 750 |
my %escape = ('<'=>'<', '>'=>'>', '&'=>'&', '"'=>'"'); |
| 751 |
my $escape_re = join '|' => keys %escape; |
| 752 |
|
| 753 |
sub to_xml { |
| 754 |
my $self = shift || confess "you should call to_xml as object!"; |
| 755 |
|
| 756 |
my $d = shift || return; |
| 757 |
$d = $self->SUPER::_recode($d); |
| 758 |
confess "escape_re undefined!" unless ($escape_re); |
| 759 |
$d =~ s/($escape_re)/$escape{$1}/g; |
| 760 |
return $d; |
| 761 |
} |
| 762 |
|
| 763 |
=head3 to_jsfind |
| 764 |
|
| 765 |
Create jsFind xml files |
| 766 |
|
| 767 |
my $nr=$tree->to_jsfind('/path/to/index','0'); |
| 768 |
|
| 769 |
Returns number of elements created |
| 770 |
|
| 771 |
=cut |
| 772 |
|
| 773 |
|
| 774 |
sub to_jsfind { |
| 775 |
my $self = shift; |
| 776 |
my ($path,$file) = @_; |
| 777 |
|
| 778 |
return 0 if $self->is_empty; |
| 779 |
|
| 780 |
confess("path is undefined.") unless ($path); |
| 781 |
confess("file is undefined. Did you call \$t->root->to_jsfind(..) instead of \$t->to_jsfind(..) ?") unless (defined($file)); |
| 782 |
|
| 783 |
my $nr_keys = 0; |
| 784 |
|
| 785 |
my ($k, $d, $s) = @$self; |
| 786 |
my $N = $self->size; |
| 787 |
|
| 788 |
my ($key_xml, $data_xml) = ("<n>","<d>"); |
| 789 |
|
| 790 |
for (my $i = 0; $i <= $N; $i++) { |
| 791 |
my $key = lc($k->[$i]); |
| 792 |
|
| 793 |
if ($key) { |
| 794 |
$key_xml .= '<k>'.$self->to_xml($key).'</k>'; |
| 795 |
$data_xml .= '<e>'; |
| 796 |
#use Data::Dumper; |
| 797 |
#print Dumper($d->[$i]); |
| 798 |
foreach my $path (keys %{$d->[$i]}) { |
| 799 |
$data_xml .= '<l f="'.($d->[$i]->{$path}->{'f'} || 1).'" t="'.$self->to_xml($d->[$i]->{$path}->{'t'} || 'no title').'">'.$self->to_xml($path).'</l>'; |
| 800 |
$nr_keys++; |
| 801 |
} |
| 802 |
$data_xml .= '</e>'; |
| 803 |
} |
| 804 |
|
| 805 |
$nr_keys += $s->[$i]->to_jsfind("$path/$file","$i") if ($s->[$i]); |
| 806 |
} |
| 807 |
|
| 808 |
$key_xml .= '</n>'; |
| 809 |
$data_xml .= '</d>'; |
| 810 |
|
| 811 |
if (! -e $path) { |
| 812 |
mkpath($path) || croak "can't create dir '$path': $!"; |
| 813 |
} |
| 814 |
|
| 815 |
open(K, "> ${path}/${file}.xml") || croak "can't open '$path/$file.xml': $!"; |
| 816 |
open(D, "> ${path}/_${file}.xml") || croak "can't open '$path/_$file.xml': $!"; |
| 817 |
|
| 818 |
print K $key_xml; |
| 819 |
print D $data_xml; |
| 820 |
|
| 821 |
close(K); |
| 822 |
close(D); |
| 823 |
|
| 824 |
return $nr_keys; |
| 825 |
} |
| 826 |
|
| 827 |
1; |
| 828 |
__END__ |
| 829 |
|
| 830 |
=head1 SEE ALSO |
| 831 |
|
| 832 |
jsFind web site L<http://www.elucidsoft.net/projects/jsfind/> |
| 833 |
|
| 834 |
B-Trees in perl web site L<http://perl.plover.com/BTree/> |
| 835 |
|
| 836 |
=head1 AUTHORS |
| 837 |
|
| 838 |
Mark-Jonson Dominus E<lt>mjd@pobox.comE<gt> wrote C<BTree.pm> which was |
| 839 |
base for this module |
| 840 |
|
| 841 |
Shawn P. Garbett E<lt>shawn@elucidsoft.netE<gt> wrote jsFind |
| 842 |
|
| 843 |
Dobrica Pavlinusic E<lt>dpavlin@rot13.orgE<gt> wrote this module |
| 844 |
|
| 845 |
=head1 COPYRIGHT AND LICENSE |
| 846 |
|
| 847 |
Copyright (C) 2004 by Dobrica Pavlinusic |
| 848 |
|
| 849 |
This program is free software; you can redistribute it and/or modify it |
| 850 |
under the terms of the GNU General Public License as published by the Free |
| 851 |
Software Foundation; either version 2 of the License, or (at your option) |
| 852 |
any later version. This program is distributed in the hope that it will be |
| 853 |
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 854 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| 855 |
Public License for more details. |
| 856 |
|
| 857 |
=cut |
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