/usr/share/php/arc/store/ARC2_MemStore.php is in libarc-php 2.2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* ARC2 Memory Store
*
* @author Benjamin Nowack <bnowack@semsol.com>
* @license http://arc.semsol.org/license
* @package ARC2
* @version 2010-11-16
*/
ARC2::inc('Class');
class ARC2_MemStore extends ARC2_Class {
function __construct($a, &$caller) {
parent::__construct($a, $caller);
$this->is_mem = 1;
}
function __init() {
parent::__init();
$this->data = array();
}
/* */
function isSetUp() {
return 1;
}
function setUp() {}
/* */
function reset() {
$this->data = array();
}
function drop() {
$this->reset();
}
/* */
function insert($doc, $g = 'http://localhost/') {
$index = $this->v($g, array(), $this->data);
$this->data[$g] = ARC2::getMergedIndex($index, $this->toIndex($doc));
}
/* */
/* */
function delete($doc, $g = 'http://localhost/') {
$index = $this->v($g, array(), $this->data);
$this->data[$g] = ARC2::getCleanedIndex($index, $this->toIndex($doc));
}
function replace($doc, $g, $doc_2) {
return array($this->delete($doc, $g), $this->insert($doc_2, $g));
}
/* */
function query($q, $result_format = '', $src = '', $keep_bnode_ids = 0, $log_query = 0) {
if ($log_query) $this->logQuery($q);
ARC2::inc('SPARQLPlusParser');
$p = new ARC2_SPARQLPlusParser($this->a, $this);
$p->parse($q, $src);
$infos = $p->getQueryInfos();
$t1 = ARC2::mtime();
if (!$errs = $p->getErrors()) {
$qt = $infos['query']['type'];
$r = array('query_type' => $qt, 'result' => $this->runQuery($q, $qt));
}
else {
$r = array('result' => '');
}
$t2 = ARC2::mtime();
$r['query_time'] = $t2 - $t1;
/* query result */
if ($result_format == 'raw') {
return $r['result'];
}
if ($result_format == 'rows') {
return $this->v('rows', array(), $r['result']);
}
if ($result_format == 'row') {
return $r['result']['rows'] ? $r['result']['rows'][0] : array();
}
return $r;
}
function runQuery($q, $qt = '') {
/* ep */
$ep = $this->v('remote_store_endpoint', 0, $this->a);
if (!$ep) return false;
/* prefixes */
$ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$added_prefixes = array();
$prologue = '';
foreach ($ns as $k => $v) {
$k = rtrim($k, ':');
if (in_array($k, $added_prefixes)) continue;
if (preg_match('/(^|\s)' . $k . ':/s', $q) && !preg_match('/PREFIX\s+' . $k . '\:/is', $q)) {
$prologue .= "\n" . 'PREFIX ' . $k . ': <' . $v . '>';
}
$added_prefixes[] = $k;
}
$q = $prologue . "\n" . $q;
/* http verb */
$mthd = in_array($qt, array('load', 'insert', 'delete')) ? 'POST' : 'GET';
/* reader */
ARC2::inc('Reader');
$reader = new ARC2_Reader($this->a, $this);
$reader->setAcceptHeader('Accept: application/sparql-results+xml; q=0.9, application/rdf+xml; q=0.9, */*; q=0.1');
if ($mthd == 'GET') {
$url = $ep;
$url .= strpos($ep, '?') ? '&' : '?';
$url .= 'query=' . urlencode($q);
if ($k = $this->v('store_read_key', '', $this->a)) $url .= '&key=' . urlencode($k);
}
else {
$url = $ep;
$reader->setHTTPMethod($mthd);
$reader->setCustomHeaders("Content-Type: application/x-www-form-urlencoded");
$suffix = ($k = $this->v('store_write_key', '', $this->a)) ? '&key=' . rawurlencode($k) : '';
$reader->setMessageBody('query=' . rawurlencode($q) . $suffix);
}
$to = $this->v('remote_store_timeout', 0, $this->a);
$reader->activate($url, '', 0, $to);
$format = $reader->getFormat();
$resp = '';
while ($d = $reader->readStream()) {
$resp .= $d;
}
$reader->closeStream();
$ers = $reader->getErrors();
unset($this->reader);
if ($ers) return array('errors' => $ers);
$mappings = array('rdfxml' => 'RDFXML', 'sparqlxml' => 'SPARQLXMLResult', 'turtle' => 'Turtle');
if (!$format || !isset($mappings[$format])) {
return $resp;
//return $this->addError('No parser available for "' . $format . '" SPARQL result');
}
/* format parser */
$suffix = $mappings[$format] . 'Parser';
ARC2::inc($suffix);
$cls = 'ARC2_' . $suffix;
$parser = new $cls($this->a, $this);
$parser->parse($ep, $resp);
/* ask|load|insert|delete */
if (in_array($qt, array('ask', 'load', 'insert', 'delete'))) {
$bid = $parser->getBooleanInsertedDeleted();
switch ($qt) {
case 'ask': return $bid['boolean'];
default: return $bid;
}
}
/* select */
if (($qt == 'select') && !method_exists($parser, 'getRows')) return $resp;
if ($qt == 'select') return array('rows' => $parser->getRows(), 'variables' => $parser->getVariables());
/* any other */
return $parser->getSimpleIndex(0);
}
/* */
function optimizeTables() {}
/* */
function getResourceLabel($res, $unnamed_label = 'An unnamed resource') {
if (!isset($this->resource_labels)) $this->resource_labels = array();
if (isset($this->resource_labels[$res])) return $this->resource_labels[$res];
if (!preg_match('/^[a-z0-9\_]+\:[^\s]+$/si', $res)) return $res;/* literal */
$r = '';
if (preg_match('/^\_\:/', $res)) {
return $unnamed_label;
}
$row = $this->query('SELECT ?o WHERE { <' . $res . '> ?p ?o . FILTER(REGEX(str(?p), "(label|name)$", "i"))}', 'row');
if ($row) {
$r = $row['o'];
}
else {
$r = preg_replace("/^(.*[\/\#])([^\/\#]+)$/", '\\2', str_replace('#self', '', $res));
$r = str_replace('_', ' ', $r);
$r = preg_replace('/([a-z])([A-Z])/e', '"\\1 " . strtolower("\\2")', $r);
}
$this->resource_labels[$res] = $r;
return $r;
}
}
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