/**
* This method takes a json encoded rdf-model and a reference to aa (usually empty) MemModel, parses the json
* string and adds the statements to the given MemModel.
*
* @param string $jsonString The string that contains the rdf model, encoded as a json-string.
* @param MemModel $model A reference to the model, where to add the statements, usually an empty MemModel.
*/
public function generateModelFromString($jsonString, $model)
{
$jsonModel = array();
$jsonModel = json_decode($jsonString, true);
// throws an excpetion if json model was corrupt
if (!is_array($jsonModel)) {
throw new Exception('error in json string');
}
foreach ($jsonModel as $subject => $remain) {
foreach ($remain as $predicate => $object) {
$s = strpos($subject, '_') === 0 ? new BlankNode(substr($subject, 2)) : new Resource($subject);
$p = new Resource($predicate);
foreach ($object as $obj) {
if ($obj['type'] === 'uri') {
$o = new Resource($obj['value']);
} else {
if ($obj['type'] === 'bnode') {
$o = new BlankNode(substr($obj['value'], 2));
} else {
$dtype = isset($obj['datatype']) ? $obj['datatype'] : '';
$lang = isset($obj['lang']) ? $obj['lang'] : '';
$oVal = $obj['value'];
$o = new Literal($oVal, $lang);
$o->setDatatype($dtype);
}
}
$model->add(new Statement($s, $p, $o));
}
}
}
}
private function characters($parser, $data)
{
//print_r("characters : $data<p/> \n");
if ($this->curElement == "URI" || $this->curElement == "BNODE" || $this->curElement == "LITERAL") {
switch ($this->curVar) {
case "Res":
//print_r("Neue Resource : $data <p/> \n");
$this->curArray["?Res"] = new Resource($data);
break;
case "Attr":
//print_r("Neues Attr : $data <p/> \n");
$this->curArray["?Attr"] = new Resource($data);
break;
case "Val":
if ($this->curElement != "LITERAL") {
//print_r("Neue Resource als Val: $data <p/> \n");
$this->curArray["?Val"] = new Resource($data);
} else {
$this->curLiteralData .= $data;
$l = new Literal($this->curLiteralData);
$l->setDatatype($this->curDataType);
$this->curArray["?Val"] = $l;
}
break;
}
}
}
/**
* tests if contains returns false if the Literal in the given statement has wrong datatype
* using all kinds of indices.
*/
function testContainsLiteralFalse()
{
$_SESSION['test'] = 'MemModel contains literal false test';
for ($i = -1; $i < 4; $i++) {
$mod = $this->_generateModelLiteral(3, $i);
$lit = new Literal('http://www.example.org/obj2');
$lit->setDatatype('notTest');
$stat = new Statement(new Resource('http://www.example.org/sub2'), new Resource('http://www.example.org/pred2'), $lit);
$this->assertFalse($mod->contains($stat));
}
}
public function accept($extractionResult)
{
$model1 = ModelFactory::getDefaultModel("http://dbpedia.org/");
// RAP model
$count = 0;
foreach (new ArrayObject($extractionResult->getTriples()) as $triple) {
$count++;
$tripleString = explode(">", $triple->toString());
$s = str_replace("<", "", $tripleString[0]);
$p = str_replace("<", "", $tripleString[1]);
// $s = preg_replace("/<|>/","",$triple->getSubject());
// $p = preg_replace("/<|>/","",$triple->getPredicate());
$o = $tripleString[2];
$subject = new Resource($s);
$predicate = new Resource($p);
if (strpos($o, "<")) {
// echo "<br>" . $s. $p . $p;
if (!strpos($o, "^^")) {
// echo " a";
$o = str_replace("<", "", $o);
$object = new Resource($o);
} else {
// echo " b";
$pos = strpos($o, "^^");
$literal = substr($o, 0, $pos);
$object = new Literal($literal);
$object->setDatatype(substr($o, $pos + 3, strlen($o) - $pos - 3));
}
} else {
// $lang = "en";
if (preg_match("/(.*)(@)([a-zA-Z]+) \\.\$/", $o, $match)) {
$o = $match[1];
$lang = $match[3];
$object = new Literal($o, $lang);
} else {
$object = new Literal($o);
}
}
$statement = new Statement($subject, $predicate, $object);
$model1->add($statement);
}
if ($count > 0) {
echo "<br><br><h3>" . $extractionResult->getExtractorID() . "</h3>";
echo $model1->writeAsHtmlTable();
}
}
private function renderWidgetList($value, $choices, $attributes)
{
$name = $this->getAttribute('name');
$flags = $this->getAttribute('flags');
$hiddenWidget = new Hidden($this->view);
$hiddenWidget->setAttribute('flags', $flags)->setAttribute('value', '')->setAttribute('class', 'Hidden')->setAttribute('name', $name);
$contentWidget = new Literal($this->view);
$contentWidget->setAttribute('data', $this->generateSelectorContentWidgetList($name, $value, $choices, $flags));
$panelWidget = new Panel($this->view);
$panelWidget->setAttribute('class', $attributes['class'])->setAttribute('name', $name)->insert($hiddenWidget)->insert($contentWidget);
if ($this->getAttribute('flags') & \Nethgui\Renderer\WidgetFactoryInterface::LABEL_NONE) {
return $panelWidget->renderContent();
}
$fieldsetWidget = new Fieldset($this->view);
$fieldsetWidget->setAttribute('template', $this->getAttribute('label', $this->getTranslateClosure($name . '_label')))->setAttribute('flags', $this->getAttribute('flags'));
if ($this->hasAttribute('icon-before')) {
$fieldsetWidget->setAttribute('icon-before', $this->getAttribute('icon-before'));
}
$fieldsetWidget->insert($panelWidget);
return $fieldsetWidget->renderContent();
}
function generateResultStatementsFromVarResult(&$result, $parsedq, &$outm, $closure, &$model)
{
foreach ($parsedq['patterns'] as $n => $pattern) {
if (substr($pattern['subject']['value'], 0, 1) == '?') {
$subj = $result[$pattern['subject']['value']];
} else {
$subj = new Resource($pattern['subject']['value']);
}
if (substr($pattern['predicate']['value'], 0, 1) == '?') {
$pred = $result[$pattern['predicate']['value']];
} else {
$pred = new Resource($pattern['predicate']['value']);
}
if (substr($pattern['object']['value'], 0, 1) == '?') {
$obj = $result[$pattern['object']['value']];
} else {
if ($pattern['object']['is_literal']) {
$obj = new Literal($pattern['object']['value']);
$obj->setDatatype($pattern['object']['l_dtype']);
$obj->setLanguage($pattern['object']['l_lang']);
} else {
$obj = new Resource($pattern['object']['value']);
}
}
$stmt = new Statement($subj, $pred, $obj);
// bNode closure
if (is_a($stmt->object(), 'BlankNode') && $closure == True) {
getBNodeClosure($stmt->object(), $model, $outm);
}
if (is_a($stmt->subject(), 'BlankNode') && $closure == True) {
getBNodeClosure($stmt->subject(), $model, $outm);
}
// Add statement to model
$outm->add($stmt);
}
}
/**
* Convert an ADORecordSet to a memory Model.
*
* Every successful database query returns an ADORecordSet object which is actually
* a cursor that holds the current row in the array fields[].
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
* !!! This method can only be applied to a RecordSet with array fields[]
* !!! containing a representation of the database table: statements,
* !!! with an index corresponding to following table columns:
* !!! [0] - subject, [1] - predicate, [2] - object, [3] - l_language,
* !!! [4] - l_datatype, [5] - subject_is, [6] - object_is
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*
* @param object ADORecordSet
* @return object MemModel
* @access private
*/
function _convertRecordSetToMemModel(&$recordSet)
{
$res = new MemModel($this->baseURI);
while (!$recordSet->EOF) {
// subject
if ($recordSet->fields[5] == 'r') {
$sub = new Resource($recordSet->fields[0]);
} else {
$sub = new BlankNode($recordSet->fields[0]);
}
// predicate
$pred = new Resource($recordSet->fields[1]);
// object
if ($recordSet->fields[6] == 'r') {
$obj = new Resource($recordSet->fields[2]);
} elseif ($recordSet->fields[6] == 'b') {
$obj = new BlankNode($recordSet->fields[2]);
} else {
$obj = new Literal($recordSet->fields[2], $recordSet->fields[3]);
if ($recordSet->fields[4]) {
$obj->setDatatype($recordSet->fields[4]);
}
}
$statement = new Statement($sub, $pred, $obj);
$res->add($statement);
$recordSet->moveNext();
}
$res->addParsedNamespaces($this->getParsedNamespaces());
return $res;
}
/**
* Returns the current item.
*
* @return mixed
* @access public
*/
function ¤t()
{
if ($this->dbResultSet === false) {
return null;
}
// subject
if ($this->dbResultSet->fields[5] == 'r') {
$sub = new Resource($this->dbResultSet->fields[0]);
} else {
$sub = new BlankNode($this->dbResultSet->fields[0]);
}
// predicate
$pred = new Resource($this->dbResultSet->fields[1]);
// object
if ($this->dbResultSet->fields[6] == 'r') {
$obj = new Resource($this->dbResultSet->fields[2]);
} elseif ($this->dbResultSet->fields[6] == 'b') {
$obj = new BlankNode($this->dbResultSet->fields[2]);
} else {
$obj = new Literal($this->dbResultSet->fields[2], $this->dbResultSet->fields[3]);
if ($this->dbResultSet->fields[4]) {
$obj->setDatatype($this->dbResultSet->fields[4]);
}
}
if ($this->returnAsTriples) {
return new Statement($sub, $pred, $obj);
}
return new Quad(new Resource($this->dbResultSet->fields[7]), $sub, $pred, $obj);
}
/** Add a literal value as a property of a resource
*
* The resource can either be a resource or the URI of a resource.
* The value can either be a single value or an array of values.
*
* Example:
* $graph->add("http://www.example.com", 'dc:title', 'Title of Page');
*
* @param mixed $resource The resource to add data to
* @param mixed $property The property name
* @param mixed $value The value or values for the property
* @param string $lang The language of the literal
*
* @return integer The number of values added
*/
public function addLiteral($resource, $property, $value, $lang = null)
{
$this->checkResourceParam($resource);
$this->checkSinglePropertyParam($property, $inverse);
if (is_array($value)) {
$added = 0;
foreach ($value as $v) {
$added += $this->addLiteral($resource, $property, $v, $lang);
}
return $added;
} elseif (!is_object($value) or !$value instanceof Literal) {
$value = Literal::create($value, $lang);
}
return $this->add($resource, $property, $value);
}
private function body_for_pattern_matcher($patterns, $context)
{
$body = '';
foreach ($patterns as $regex => $native_method) {
$regex = new Literal($regex);
$body .= 'if (preg_match(' . $regex->to_php() . ', $method, $matches)) {';
$body .= ' $args[] = $matches;';
$body .= ' return call_user_func_array(array(' . $context . ', "' . $native_method . '"), $args);';
$body .= '}';
}
$body .= 'throw new \\Exception("Unknown method \'$method\'");';
return $body;
}
function tagData($parser, $tagData)
{
switch ($this->mode) {
case 0:
$this->arrOutput[$this->counter][$this->varname] = new Resource($tagData);
$this->mode = -1;
break;
case 1:
$lit = new Literal($tagData);
if ($this->lang) {
$lit->setLanguage($this->lang);
}
if ($this->dtype) {
$lit->setDatatype($this->dtype);
}
$this->arrOutput[$this->counter][$this->varname] = $lit;
$this->mode = -1;
break;
case 2:
if ($tagData == "/") {
$bn = "bNode" . $this->bncounter;
$this->bncounter++;
} else {
$bn = $tagData;
}
$this->arrOutput[$this->counter][$this->varname] = new BlankNode($bn);
$this->mode = -1;
break;
case 3:
$this->arrOutput = $tagData;
$this->mode = -1;
break;
}
}
public function __toString()
{
return parent::__toString() . "^^" . $this->getDataType();
}
function tagClosed($parser, $name)
{
if ($this->mode == 1) {
$lit = new Literal($this->current_literal);
if ($this->lang) {
$lit->setLanguage($this->lang);
}
if ($this->dtype) {
$lit->setDatatype($this->dtype);
}
$this->arrOutput[$this->counter][$this->varname] = $lit;
$this->mode = -1;
}
}
function _generateModelLiteral()
{
$model = new MemModel();
$model->setBaseURI('http://www.example.org');
$sub = new Resource('http://www.example.org/subject1');
$pred = new Resource('http://www.example.org/predicate1');
$obj = new Literal('http://www.example.org/object1');
$obj->setDatatype('test');
$obj->setLanguage('DE');
$model->add(new Statement($sub, $pred, $obj));
return $model;
}
/**
* Filter tuples containing variables matching all patterns from the WHERE clause
* of an RDQL query. As a result of a database query using ADOdb these tuples
* are returned as an ADORecordSet object, which is then passed to this function.
*
* @param object ADORecordSet &$recordSet
* @return array [][?VARNAME]['value'] = string
* ['nType'] = string
* ['l_lang'] = string
* ['l_dtype'] = string
* @access private
*/
function filterQueryResult(&$recordSet)
{
$queryResult = array();
if (isset($this->parsedQuery['filters'])) {
while (!$recordSet->EOF) {
foreach ($this->parsedQuery['filters'] as $filter) {
$evalFilterStr = $filter['evalFilterStr'];
// evaluate regex equality expressions of each filter
foreach ($filter['regexEqExprs'] as $i => $expr) {
preg_match($expr['regex'], $recordSet->fields[$this->rsIndexes[$expr['var']]['value']], $match);
$op = substr($expr['operator'], 0, 1);
if ($op != '!' && !isset($match[0]) || $op == '!' && isset($match[0])) {
$evalFilterStr = str_replace("##RegEx_{$i}##", 'FALSE', $evalFilterStr);
} else {
$evalFilterStr = str_replace("##RegEx_{$i}##", 'TRUE', $evalFilterStr);
}
}
// evaluate string equality expressions
foreach ($filter['strEqExprs'] as $i => $expr) {
$exprBoolVal = 'FALSE';
switch ($expr['value_type']) {
case 'variable':
if ($recordSet->fields[$this->rsIndexes[$expr['var']]['value']] == $recordSet->fields[$this->rsIndexes[$expr['value']]['value']] && $expr['operator'] == 'eq' || $recordSet->fields[$this->rsIndexes[$expr['var']]['value']] != $recordSet->fields[$this->rsIndexes[$expr['value']]['value']] && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
case 'URI':
if (isset($this->rsIndexes[$expr['var']]['nType']) && $recordSet->fields[$this->rsIndexes[$expr['var']]['nType']] == 'l') {
if ($expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
}
if ($recordSet->fields[$this->rsIndexes[$expr['var']]['value']] == $expr['value'] && $expr['operator'] == 'eq' || $recordSet->fields[$this->rsIndexes[$expr['var']]['value']] != $expr['value'] && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
case 'Literal':
if (!isset($this->rsIndexes[$expr['var']]['nType']) || $recordSet->fields[$this->rsIndexes[$expr['var']]['nType']] != 'l') {
if ($expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
}
$filterLiteral = new Literal($expr['value'], $expr['value_lang']);
$filterLiteral->setDatatype($expr['value_dtype']);
$resultLiteral = new Literal($recordSet->fields[$this->rsIndexes[$expr['var']]['value']]);
$resultLiteral->setDatatype($recordSet->fields[$this->rsIndexes[$expr['var']]['l_dtype']]);
$resultLiteral->setLanguage($recordSet->fields[$this->rsIndexes[$expr['var']]['l_lang']]);
$equal = $resultLiteral->equals($filterLiteral);
if ($equal && $expr['operator'] == 'eq' || !$equal && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
} else {
$exprBoolVal = 'FALSE';
}
}
$evalFilterStr = str_replace("##strEqExpr_{$i}##", $exprBoolVal, $evalFilterStr);
}
// evaluate numerical expressions
foreach ($filter['numExprVars'] as $varName) {
$varValue = "'" . $recordSet->fields[$this->rsIndexes[$varName]['value']] . "'";
$evalFilterStr = str_replace($varName, $varValue, $evalFilterStr);
}
eval("\$filterBoolVal = {$evalFilterStr}; \$eval_filter_ok = TRUE;");
if (!isset($eval_filter_ok)) {
trigger_error(RDQL_AND_ERR . "'" . htmlspecialchars($filter['string']) . "'", E_USER_ERROR);
}
if (!$filterBoolVal) {
$recordSet->MoveNext();
continue 2;
}
}
$queryResult[] = $this->_convertRsRowToQueryResultRow($recordSet->fields);
$recordSet->MoveNext();
}
} else {
while (!$recordSet->EOF) {
$queryResult[] = $this->_convertRsRowToQueryResultRow($recordSet->fields);
$recordSet->MoveNext();
}
}
return $queryResult;
}
function MwRdfLiteral($str, $type = null, $lang = null)
{
static $cache = array();
if (isset($cache["{$type}:{$lang}:{$str}"])) {
return $cache["{$type}:{$lang}:{$str}"];
} else {
if (isset($lang)) {
$lit = new Literal($str, $lang);
} else {
$lit = new Literal($str);
}
if (isset($type)) {
$lit->setDatatype($type);
}
$cache["{$type}:{$lang}:{$str}"] = $lit;
return $lit;
}
}
/**
* Comparison function for sorting literals by their id
*
* @param Literal $a
* @param Literal $b
* @return int 0 if the literals are equal, 1 if b is larger than a, -1 else
*/
private function compareLiteralsById(Literal $a, Literal $b)
{
if ($a->getId() === $b->getId()) {
return 0;
}
return $a->getId() < $b->getId() ? -1 : 1;
}
/**
* Constructs a RAP RDFNode from URI/Literal/Bnode
* @access private
* @param string $s
* @returns object RDFNode
**/
function toRDFNode($s, $state)
{
$ins = substr($s, 1, -1);
if ($s[0] == "\"") {
$lang = NULL;
if (count($state) > 3) {
for ($i = 3; $i < count($state); $i++) {
if ($state[$i][0] == '@') {
$lang = substr($state[3], 1);
}
if (substr($state[$i], 0, 2) == '^^') {
$dtype = substr($state[$i], 2);
if ($dtype[0] == '<') {
$dtype = substr($dtype, 1, -1);
}
}
}
}
if (UNIC_RDF) {
$ins = $this->str2unicode_nfc($ins);
}
$new_Literal = new Literal($ins, $lang);
if (isset($dtype)) {
$new_Literal->setDatatype($dtype);
}
return $new_Literal;
}
if (strstr($s, '_' . BNODE_PREFIX)) {
if ($this->FixBnodes or !array_search($s, $this->bNodeMap)) {
return new BlankNode($ins);
} else {
return new BlankNode(trim(substr(array_search($s, $this->bNodeMap), 2)));
}
}
return new Resource($ins);
}
/**
* converts a ResResource, ResProperty, or ResLiteral into a Resource, Blanknode, or Literal
*
* @param object ResNode $resNode
* @return object Node
* @access private
* @throws phpErrpr
*/
function _resNode2Node($resNode)
{
if (is_a($resNode, 'ResResource')) {
if ($resNode->getIsAnon()) {
$return = new BlankNode($resNode->getURI());
} else {
$return = new Resource($resNode->getURI());
}
return $return;
}
if (is_a($resNode, 'ResLiteral')) {
$literal = new Literal($resNode->getLabel(), $resNode->getLanguage());
if ($resNode->getDatatype() != null) {
$literal->setDatatype($resNode->getDatatype());
}
return $literal;
}
}
/**
* return a mathing resource tyoe
*
* @param string
* @param object simpleXMLNode $value
* @access private
*/
function _element2Resource($tag, $value)
{
switch ($tag) {
case 'uri':
return new Resource((string) $value);
break;
case 'id':
return new BlankNode((string) $value);
break;
case 'typedLiteral':
$literal = new Literal((string) $value);
$literal->setDatatype((string) $value['datatype']);
return $literal;
break;
case 'plainLiteral':
$literal = new Literal((string) $value);
if (isset($value['xml:lang'])) {
$literal->setLanguage((string) $value['xml:lang']);
}
return $literal;
break;
}
}
/**
* Checks if the Node is a typed Literal.
*
* @param String $node
*
* @return boolean TRUE if typed FALSE if not
*/
protected function dtypeCheck(&$node)
{
$patternInt = "/^-?[0-9]+\$/";
$match = preg_match($patternInt, $node, $hits);
if ($match > 0) {
$node = new Literal($hits[0]);
$node->setDatatype(XML_SCHEMA . 'integer');
return true;
}
$patternBool = "/^(true|false)\$/";
$match = preg_match($patternBool, $node, $hits);
if ($match > 0) {
$node = new Literal($hits[0]);
$node->setDatatype(XML_SCHEMA . 'boolean');
return true;
}
$patternType = "/^a\$/";
$match = preg_match($patternType, $node, $hits);
if ($match > 0) {
$node = new Resource(RDF_NAMESPACE_URI . 'type');
return true;
}
$patternDouble = "/^-?[0-9]+.[0-9]+[e|E]?-?[0-9]*/";
$match = preg_match($patternDouble, $node, $hits);
if ($match > 0) {
$node = new Literal($hits[0]);
$node->setDatatype(XML_SCHEMA . 'double');
return true;
}
return false;
}
/**
* Constructs a RAP RDFNode from URI/Literal/Bnode
* @access private
* @param string $s
* @returns object RDFNode
**/
function toRDFNode($s, $state)
{
$ins = substr($s, 1, -1);
if ($s[0] == '"' || $s[0] == '\'') {
$lang = NULL;
if (count($state) > 3) {
for ($i = 3; $i < count($state); $i++) {
if ($state[$i][0] == '@') {
$lang = substr($state[3], 1);
}
if (substr($state[$i], 0, 2) == '^^') {
$dtype = substr($state[$i], 2);
if ($dtype[0] == '<') {
$dtype = substr($dtype, 1, -1);
}
}
}
}
if (UNIC_RDF) {
$ins = $this->str2unicode_nfc($ins);
}
$new_Literal = new Literal($ins, $lang);
if (isset($dtype)) {
$new_Literal->setDatatype($dtype);
}
return $new_Literal;
} else {
if (is_int($s)) {
$value = new Literal($s);
$value->setDatatype(XML_SCHEMA . 'integer');
return $value;
} else {
if (is_float($s)) {
$value = new Literal($s);
$value->setDatatype(XML_SCHEMA . 'double');
return $value;
} else {
if ($s == '@true') {
$value = new Literal(true);
$value->setDatatype(XML_SCHEMA . 'boolean');
return $value;
} else {
if ($s == '@false') {
$value = new Literal(false);
$value->setDatatype(XML_SCHEMA . 'boolean');
return $value;
}
}
}
}
}
if (strstr($s, '_' . BNODE_PREFIX)) {
if ($this->FixBnodes || !array_search($s, $this->bNodeMap)) {
return new BlankNode($ins);
} else {
return new BlankNode(trim(substr(array_search($s, $this->bNodeMap), 2)));
}
}
return new Resource($ins);
}
/**
* Constructor
* You have to supply a string.
*
* @param string $str label of the literal
* @param string $language optional language identifier
*/
function ResLiteral($str, $language = null)
{
parent::Literal($str, $language);
}
/**
* Perform an RDQL query on this Model. Should work with all types of models.
* This method returns a MemModel containing the result statements.
* If $closure is set to TRUE, the result will additionally contain
* statements found by the findForward-method for blank nodes.
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
* WARNING: If called with $closure = TRUE this method
* can be slow with large models.
* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*
* @author Anton K�tlbacher <*****@*****.**>
* @author code snippets taken from the RAP Netapi by Phil Dawes and Chris Bizer
* @access public
* @param string $queryString
* @param boolean $closure
* @return object MemModel
*
*/
function &getMemModelByRDQL($queryString, $closure = FALSE)
{
require_once RDFAPI_INCLUDE_DIR . PACKAGE_RDQL;
$parser = new RdqlParser();
$parsedQuery =& $parser->parseQuery($queryString);
// If there are variables used in the pattern but not
// in the select clause, add them to the select clause
foreach ($parsedQuery['patterns'] as $n => $pattern) {
foreach ($pattern as $key => $val_1) {
if ($val_1['value'][0] == '?') {
if (!in_array($val_1['value'], $parsedQuery['selectVars'])) {
array_push($parsedQuery['selectVars'], $val_1['value']);
}
}
}
}
if (is_a($this, "DbModel")) {
$engine = new RdqlDbEngine();
$model = $this;
} elseif (is_a($this, "MemModel")) {
$engine = new RdqlMemEngine();
$model = $this;
} elseif (is_a($this, "ResModel")) {
$engine = new RdqlMemEngine();
$model = $this->model;
}
$res = $engine->queryModel($model, $parsedQuery, TRUE);
$rdqlIter = new RdqlResultIterator($res);
$newModel = new MemModel();
// Build statements from RdqlResultIterator
while ($rdqlIter->hasNext()) {
$result = $rdqlIter->next();
foreach ($parsedQuery['patterns'] as $n => $pattern) {
if (substr($pattern['subject']['value'], 0, 1) == '?') {
$subj = $result[$pattern['subject']['value']];
} else {
$subj = new Resource($pattern['subject']['value']);
}
if (substr($pattern['predicate']['value'], 0, 1) == '?') {
$pred = $result[$pattern['predicate']['value']];
} else {
$pred = new Resource($pattern['predicate']['value']);
}
if (substr($pattern['object']['value'], 0, 1) == '?') {
$obj = $result[$pattern['object']['value']];
} else {
if (isset($pattern['object']['is_literal'])) {
$obj = new Literal($pattern['object']['value']);
$obj->setDatatype($pattern['object']['l_dtype']);
$obj->setLanguage($pattern['object']['l_lang']);
} else {
$obj = new Resource($pattern['object']['value']);
}
}
$statement = new Statement($subj, $pred, $obj);
$newModel->add($statement);
// findForward() Statements containing an eventually given blank node
// and add them to the result, if closure = true
if (is_a($statement->object(), 'BlankNode') && $closure == True) {
$newModel = $model->findForward($statement->object(), NULL, NULL, $newModel);
}
if (is_a($statement->subject(), 'BlankNode') && $closure == True) {
$newModel = $model->findForward($statement->subject(), NULL, NULL, $newModel);
}
}
}
return $newModel;
}
/**
* tests _node2ResNode()
*/
function test_node2ResNodeTest()
{
$_SESSION['test'] = 'ResModel _node2ResNode test';
$model1 = new MemModel();
$resmodel = new ResModel($model1);
$literal = new Literal('Literal', 'DE');
$literal->setDatatype('type');
$result = $resmodel->_node2ResNode($literal);
$this->assertIsA($result, 'ResLiteral');
$this->assertEqual($result->getLanguage(), 'DE');
$this->assertEqual($result->getDatatype(), 'type');
$model1->close();
}
/**
* tests if equals() works according to the RDF specifications
*
*/
function testEquals()
{
$_SESSION['test'] = 'Litras Equals test';
$literal1 = new Literal('test');
$literal2 = new Literal('test');
$this->assertTrue($literal1->equals($literal2));
$literal2->setLanguage('DE');
$this->assertFalse($literal1->equals($literal2));
$literal1->setLanguage('FR');
$this->assertFalse($literal1->equals($literal2));
$literal1->setLanguage('DE');
$this->assertTrue($literal1->equals($literal2));
$literal1->setDatatype("http://www.w3.org/TR/xmlschema-2/integer");
$this->assertFalse($literal1->equals($literal2));
$literal2->setDatatype("http://www.w3.org/TR/xmlschema-2/integer1");
$this->assertFalse($literal1->equals($literal2));
$literal2->setDatatype("http://www.w3.org/TR/xmlschema-2/integer");
$this->assertTrue($literal1->equals($literal2));
}
/**
* Creates an RDF object object
* contained in the given $dbRecordSet object.
*
* @see convertFromDbResult() to understand $strVarBase necessity
*
* @param ADORecordSet $dbRecordSet Record set returned from ADOConnection::Execute()
* @param string $strVarBase Prefix of the columns the recordset fields have.
*
* @return Resource RDF triple object resource object
*/
protected function createObjectFromDbRecordSetPart(ADORecordSet $dbRecordSet, $strVarBase, $strVar)
{
$strVarName = (string) $strVar;
if ($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_value']] === null) {
//FIXME: should be NULL, but doesn't pass test
return '';
}
switch ($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_is']]) {
case 'r':
$object = new Resource($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_value']]);
break;
case 'b':
$object = new BlankNode($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_value']]);
break;
default:
$object = new Literal($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_value']], $dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_lang']]);
if ($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_type']]) {
$object->setDatatype($dbRecordSet->fields[$strVarBase . '.' . $this->sg->arVarAssignments[$strVarName]['sql_type']]);
}
}
return $object;
}
/**
* Filter the result-set of query variables by evaluating each filter from the
* AND clause of the RDQL query.
*
* @param array &$finalRes [][?VARNAME] = object Node
* @return array [][?VARNAME] = object Node
* @access private
*/
function filterTuples(&$finalRes)
{
foreach ($this->parsedQuery['filters'] as $filter) {
foreach ($finalRes as $n => $fRes) {
$evalFilterStr = $filter['evalFilterStr'];
// evaluate regex equality expressions of each filter
foreach ($filter['regexEqExprs'] as $i => $expr) {
preg_match($expr['regex'], $fRes[$expr['var']]->getLabel(), $match);
$op = substr($expr['operator'], 0, 1);
if ($op != '!' && !isset($match[0]) || $op == '!' && isset($match[0])) {
$evalFilterStr = str_replace("##RegEx_{$i}##", 'FALSE', $evalFilterStr);
} else {
$evalFilterStr = str_replace("##RegEx_{$i}##", 'TRUE', $evalFilterStr);
}
}
// evaluate string equality expressions
foreach ($filter['strEqExprs'] as $i => $expr) {
$exprBoolVal = 'FALSE';
switch ($expr['value_type']) {
case 'variable':
if ($fRes[$expr['var']] == $fRes[$expr['value']] && $expr['operator'] == 'eq' || $fRes[$expr['var']] != $fRes[$expr['value']] && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
case 'URI':
if (is_a($fRes[$expr['var']], 'Literal')) {
if ($expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
}
if ($fRes[$expr['var']]->getLabel() == $expr['value'] && $expr['operator'] == 'eq' || $fRes[$expr['var']]->getLabel() != $expr['value'] && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
case 'Literal':
if (!is_a($fRes[$expr['var']], 'Literal')) {
if ($expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
}
break;
}
$filterLiteral = new Literal($expr['value'], $expr['value_lang']);
$filterLiteral->setDatatype($expr['value_dtype']);
$equal = $fRes[$expr['var']]->equals($filterLiteral);
/* if ($fRes[$expr['var']]->getLabel() == $expr['value'] &&
$fRes[$expr['var']]->getDatatype() == $expr['value_dtype']) {
$equal = TRUE;
// Lang tags only differentiate literals in rdf:XMLLiterals and plain literals.
// Therefore if a literal is datatyped ignore the language tag.
if ((($expr['value_dtype'] == NULL) ||
($expr['value_dtype'] == 'http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral') ||
($expr['value_dtype'] == 'http://www.w3.org/2001/XMLSchema#string')) &&
(($fRes[$expr['var']]->getLanguage() != $expr['value_lang'])))
$equal = FALSE;
}else
$equal = FALSE;
*/
if ($equal && $expr['operator'] == 'eq' || !$equal && $expr['operator'] == 'ne') {
$exprBoolVal = 'TRUE';
} else {
$exprBoolVal = 'FALSE';
}
}
$evalFilterStr = str_replace("##strEqExpr_{$i}##", $exprBoolVal, $evalFilterStr);
}
// evaluate numerical expressions
foreach ($filter['numExprVars'] as $varName) {
$varValue = "'" . $fRes[$varName]->getLabel() . "'";
$evalFilterStr = str_replace($varName, $varValue, $evalFilterStr);
}
eval("\$filterBoolVal = {$evalFilterStr}; \$eval_filter_ok = TRUE;");
if (!isset($eval_filter_ok)) {
trigger_error(RDQL_AND_ERR . "'" . htmlspecialchars($filter['string']) . "'", E_USER_ERROR);
}
if (!$filterBoolVal) {
unset($finalRes[$n]);
}
}
}
return $finalRes;
}
if ($_POST['subject_kind'] == 'resource') {
$query_subj = new Resource($_POST['query_subject']);
} else {
$query_subj = new BlankNode($_POST['query_subject']);
}
$comment_string .= "Subject = " . $_POST['query_subject'] . "<BR>";
}
if ($_POST['query_predicate'] != '') {
$query_pred = new Resource($_POST['query_predicate']);
$comment_string .= "Predicate = " . $_POST['query_predicate'] . "<BR>";
}
if ($_POST['query_object'] != '') {
if ($_POST['object_kind'] == 'resource') {
$query_obj = new Resource($_POST['query_object']);
} elseif ($_POST['object_kind'] == 'literal') {
$query_obj = new Literal($_POST['query_object']);
if ($_POST['query_object_datatype'] != '') {
$query_obj->setDatatype($_POST['query_object_datatype']);
}
} else {
$query_obj = new BlankNode($_POST['query_object']);
}
$comment_string .= "Object = " . $_POST['query_object'] . "<BR>";
}
// Execute query and display what has been done
$model = $model->find($query_subj, $query_pred, $query_obj);
echo $comment_string;
}
// Reify the model if checked in submitted form
if (isset($_POST['reify']) and $_POST['reify'] == "1") {
$model =& $model->reify();
/**
* Adds a new statement to the model
* This method is called by generateModel().
*
* @access private
* @param string &$user_data
* @param string $subject_type
* @param string $subject
* @param string $predicate
* @param string $ordinal
* @param string $object_type
* @param string $object
* @param string $xml_lang )
* @return object MemModel
*/
function add_statement_to_model(&$user_data, $subject_type, $subject, $predicate, $ordinal, $object_type, $object, $xml_lang, $datatype)
{
// ParseUnicode
if (UNIC_RDF) {
$subject = $this->str2unicode_nfc($subject);
$predicate = $this->str2unicode_nfc($predicate);
$object = $this->str2unicode_nfc($object);
}
//create subject
if ($subject_type == RDF_SUBJECT_TYPE_BNODE) {
$objsub = new BlankNode($subject);
} else {
$objsub = new Resource($subject);
}
// create predicate
$objpred = new Resource($predicate);
// create object
if ($object_type == RDF_OBJECT_TYPE_RESOURCE || $object_type == RDF_OBJECT_TYPE_BNODE) {
if ($object_type == RDF_OBJECT_TYPE_BNODE) {
$objobj = new BlankNode($object);
} else {
$objobj = new Resource($object);
}
} else {
$objobj = new Literal($object);
if ($datatype != '') {
$objobj->setDatatype($datatype);
} elseif ($xml_lang != '') {
$objobj->setLanguage($xml_lang);
}
}
// create statement
$statement = new Statement($objsub, $objpred, $objobj);
// add statement to model
if (CREATE_MODEL_WITHOUT_DUPLICATES == TRUE) {
$this->model->addWithoutDuplicates($statement);
} else {
$this->model->add($statement);
}
}
