/usr/share/php/arc/store/ARC2_StoreDescribeQueryHandler.php is in libarc-php 2~20101006-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
homepage: http://arc.semsol.org/
license: http://arc.semsol.org/license
class: ARC2 Store DESCRIBE Query Handler
author: Benjamin Nowack
version: 2010-11-16
*/
ARC2::inc('StoreSelectQueryHandler');
class ARC2_StoreDescribeQueryHandler extends ARC2_StoreSelectQueryHandler {
function __construct($a, &$caller) {/* caller has to be a store */
parent::__construct($a, $caller);
}
function __init() {/* db_con */
parent::__init();
$this->store = $this->caller;
$this->detect_labels = $this->v('detect_describe_query_labels', 0, $this->a);
}
/* */
function runQuery($infos) {
$ids = $infos['query']['result_uris'];
if ($vars = $infos['query']['result_vars']) {
$sub_r = parent::runQuery($infos);
$rf = $this->v('result_format', '', $infos);
if (in_array($rf, array('sql', 'structure', 'index'))) {
return $sub_r;
}
$rows = $this->v('rows', array(), $sub_r);
foreach ($rows as $row) {
foreach ($vars as $info) {
$val = isset($row[$info['var']]) ? $row[$info['var']] : '';
if ($val && ($row[$info['var'] . ' type'] != 'literal') && !in_array($val, $ids)) {
$ids[] = $val;
}
}
}
}
$this->r = array();
$this->described_ids = array();
$this->ids = $ids;
$this->added_triples = array();
$is_sub_describe = 0;
while ($this->ids) {
$id = $this->ids[0];
$this->described_ids[] = $id;
if ($this->detect_labels) {
$q = '
CONSTRUCT {
<' . $id . '> ?p ?o .
?o ?label_p ?o_label .
?o <http://arc.semsol.org/ns/arc#label> ?o_label .
} WHERE {
<' . $id . '> ?p ?o .
OPTIONAL {
?o ?label_p ?o_label .
FILTER REGEX(str(?label_p), "(name|label|title|summary|nick|fn)$", "i")
}
}
';
}
else {
$q = '
CONSTRUCT {
<' . $id . '> ?p ?o .
} WHERE {
<' . $id . '> ?p ?o .
}
';
}
$sub_r = $this->store->query($q);
$sub_index = is_array($sub_r['result']) ? $sub_r['result'] : array();
$this->mergeSubResults($sub_index, $is_sub_describe);
$is_sub_describe = 1;
}
return $this->r;
}
/* */
function mergeSubResults($index, $is_sub_describe = 1) {
foreach ($index as $s => $ps) {
if (!isset($this->r[$s])) $this->r[$s] = array();
foreach ($ps as $p => $os) {
if (!isset($this->r[$s][$p])) $this->r[$s][$p] = array();
foreach ($os as $o) {
$id = md5($s . ' ' . $p . ' ' . serialize($o));
if (!isset($this->added_triples[$id])) {
if (1 || !$is_sub_describe) {
$this->r[$s][$p][] = $o;
if (is_array($o) && ($o['type'] == 'bnode') && !in_array($o['value'], $this->ids)) $this->ids[] = $o['value'];
}
elseif (!is_array($o) || ($o['type'] != 'bnode')) {
$this->r[$s][$p][] = $o;
}
$this->added_triples[$id] = 1;
}
}
}
}
/* adjust ids */
$ids = $this->ids;
$this->ids = array();
foreach ($ids as $id) {
if (!in_array($id, $this->described_ids)) $this->ids[] = $id;
}
}
/* */
}
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