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sparqlwriter.class.php
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sparqlwriter.class.php
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<?php
require_once 'graphs/vocabularygraph.class.php';
require_once 'ops_ims.class.php';
require_once 'virtuosoformatter.class.php';
class SparqlWriter {
private $_config;
private $_request;
private $_parameterPropertyMapper;
var $_unknownPropertiesFromRequestParameter = array();
var $_unknownPropertiesFromConfig = array();
function __construct($config, $request, $parameterPropertyMapper){
$this->_config = $config;
$this->_request = $request;
$this->_parameterPropertyMapper = $parameterPropertyMapper;
}
private function addPrefixesToQuery($query){
$prefixesString='';
$prefixes = $this->getConfigGraph()->getPrefixesFromLoadedTurtle();
preg_match_all('/([a-zA-Z_\-]+)\:[a-zA-Z0-9_\-]+/', $query, $matches);
foreach($matches[1] as $prefix){
if(isset($prefixes[$prefix])){
$ns = $prefixes[$prefix];
$prefixesString.="PREFIX {$prefix}: <{$ns}>\n";
unset($prefixes[$prefix]);
}
}
return $prefixesString.$query;
}
function getLimit(){
$maxPageSize = $this->getConfigGraph()->getMaxPageSize();
$requestedPageSize = $this->_request->getParam('_pageSize');
$endpointDefaultPageSize = $this->getConfigGraph()->getEndpointDefaultPageSize();
$apiDefaultPageSize = $this->getConfigGraph()->getApiDefaultPageSize();
if($maxPageSize && $requestedPageSize > $maxPageSize) return $apiDefaultPageSize;
else if($requestedPageSize) return $requestedPageSize;
else if($endpointDefaultPageSize) return $endpointDefaultPageSize;
else if($apiDefaultPageSize) return $apiDefaultPageSize;
else return 10;
}
function getDefaultSelectLangs(){
$requestedDefaultLangs = $this->_request->getParam('_lang');
$endpointDefaultLangs = $this->getConfigGraph()->getEndpointDefaultLangs();
$apiDefaultLangs = $this->getConfigGraph()->getApiDefaultLangs();
if ($requestedDefaultLangs) return explode(',', $requestedDefaultLangs);
else if($endpointDefaultLangs) return explode(',', $endpointDefaultLangs);
else if($apiDefaultLangs) return explode(',', $apiDefaultLangs);
else return null;
}
function filterValueToSparqlTerm($val, $langs, $propertyUri){
$varNames = $this->getConfigGraph()->variableNamesInValue($val);
$bindings = $this->getConfigGraph()->getAllProcessedVariableBindings();
#Antonis botch
if (!$varNames AND isset($bindings['uri'])){
$varNames[]='uri';
$bindings['uri']['type'] = RDFS.'Resource' ;
}
if($varNames){
foreach($varNames as $varName){
if(isset($bindings[$varName])){
$binding = $bindings[$varName];
return array($this->variableBindingToSparqlTerm($binding, $propertyUri));
} else {
throw new ConfigGraphException("The variable {$varName} has no binding");
}
}
} else if($uri = $this->getConfigGraph()->getUriForVocabPropertyLabel($val)){
$namespaces = $this->getConfigGraph()->getPrefixesFromLoadedTurtle();
return array($this->qnameOrUri($uri, $namespaces));
} else {
$literal = '"""'.$val.'"""';
return $this->addDatatypeOrLangToLiteral($literal, $propertyUri, $langs);
}
}
private function addDatatypeOrLangToLiteral($literal, $propertyUri=false, $langs=null){
if($propertyUri){
if($propertyRange = $this->getConfigGraph()->getVocabPropertyRange($propertyUri) AND $propertyRange!=RDFS_LITERAL){
$literal .= '^^<'.$propertyRange.'>';
return array($literal);
} else {
return $this->addLangToLiteral($literal, $langs);
}
} else {
return $this->addLangToLiteral($literal, $langs);
}
}
private function addLangToLiteral($literal, $langs){
if ($langs){
$literals = array();
foreach($langs as $lang) {
$literals[] = $literal.'@'.$lang;
}
return $literals;
} else {
return array($literal);
}
}
private function fillQueryTemplate($template, $bindings){
foreach($bindings as $name => $props){
#Antonis botch
if ($name == 'uri') {
$props['type'] = RDFS.'Resource';
}
$sparqlVal = $this->variableBindingToSparqlTerm($props);
$sparqlVar = '?'.$name;
logDebug("SPARQL Variable binding: {$sparqlVal} = {$sparqlVar}");
//replace all variables with values
//(but not variables that simply start with this variable name)
$template = preg_replace('/\\'.$sparqlVar.'([^_a-zA-Z0-9])/', $sparqlVal.'$1', $template); # the \ is to escape the ? and needs \\ because it is escape char in php ...
}
return $template;
}
private function variableBindingToSparqlTerm($props, $propertyUri=false){
if(isset($props['type']) AND $props['type'] == RDFS.'Resource'){
$sparqlVal = "<{$props['value']}>";
} else {
$sparqlVal = '"""'.$props['value'].'"""';
if(isset($props['lang'])){
$sparqlVal.='@'.$props['lang'];
} else if(isset($props['datatype'])){
$sparqlVal.='^^<'.$props['datatype'].'>';
} else if(isset($props['type'])){
$sparqlVal.='^^<'.$props['type'].'>';
} else {
$sparqlVal = $this->addDatatypeOrLangToLiteral($sparqlVal, $propertyUri);
$sparqlVal = $sparqlVal[0];
}
}
return $sparqlVal;
}
function getOffset(){
$pageNo = $this->_request->getPage();
return ($pageNo - 1 ) * $this->getLimit();
}
function getOrderBy(){
$graphConditions = false;
$orderBy = false;
if($orderByRequestParam = $this->_request->getParam('_orderBy')){
$orderBy = 'ORDER BY '.$orderByRequestParam;
} else if($sort = $this->_request->getParam('_sort')){
return $this->sortToOrderBy($sort, 'request');
} else if($orderByConfig = $this->getConfigGraph()->getOrderBy()){
$bindings = $this->getConfigGraph()->getAllProcessedVariableBindings();
$orderByConfig = $this->fillQueryTemplate($orderByConfig, $bindings);
$orderBy = 'ORDER BY '.$orderByConfig;
} else if($sort = $this->getConfigGraph()->getSort()){
return $this->sortToOrderBy($sort, 'config');
}
return array(
'graphConditions' => $graphConditions,
'orderBy' => $orderBy,
);
}
private function sortToOrderBy($sort, $source){
$sortPropNames = explode(',',$sort);
$propertyLists = array();
foreach($sortPropNames as $sortName){
$ascOrDesc = ($sortName[0]=='-')? 'DESC' : 'ASC';
$sortName = ltrim($sortName, '-');
$propertyLists[]= array(
'sort-order' => $ascOrDesc,
'property-list'=> $this->_parameterPropertyMapper->mapParamNameToProperties($sortName),
);
}
return $this->propertyNameListToOrderBySparql($propertyLists);
}
private function propertyNameListToOrderBySparql($propertyLists){
$namespaces = $this->getConfigGraph()->getPrefixesFromLoadedTurtle();
$sparql = '';
$orderBy = "ORDER BY ";
$variableNames = array();
foreach($propertyLists as $propertiesListHash){
$propertiesList = $propertiesListHash['property-list'];
$sortOrder = $propertiesListHash['sort-order'];
$propertyNames = array_keys($propertiesList);
$counter=0;
$name = $propertyNames[0];
$varName = $name;
$propUri = $propertiesList[$name];
$propQnameOrUri = $this->qnameOrUri($propUri, $namespaces);
$sparql.= "\n ?item {$propQnameOrUri} ?{$name} .";
$variableNames[$name] = $propUri;
foreach($propertiesList as $name => $propUri){
if(isset($propertyNames[$counter+1])){ //if this ISN'T the last property
$nextName = $propertyNames[$counter+1];
} else if (count($propertyNames) ==1){
$orderBy.= $sortOrder.'(?'.$name.') ';
$varName = 'item';
$nextName = $propertyNames[0];
}
$nextProp = $propertiesList[$nextName];
$nextPropQnameOrUri = $this->qnameOrUri($nextProp, $namespaces);
$nextVarName = $varName.'_'.$nextName;
if ( ($counter+1) < count($propertyNames) ){ //if not last item
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} .";
$variableNames[$nextVarName] = $nextProp;
}
if ( ($counter+2) == count($propertyNames) ){
//if this is the last property in the chain, add to the order by
$orderBy.= $sortOrder.'(?'.$nextVarName.') ';
}
$varName = $nextVarName;
$counter++;
}
}
return array('graphConditions' => $sparql, 'orderBy' => $orderBy);
}
function getSelectQueryForUriList(){
if($response = $this->getExplicitSelectQuery()){
return $response;
} /*else {
return $this->getGeneratedSelectQuery();
}*/
}
private function getExplicitSelectQuery(){
if($template = $this->getConfigGraph()->getSelectWhere()){
$limit = $this->getLimit();
$expansionVariable = $this->getConfigGraph()->getExpansionVariable();
if (!isset($expansionVariable) OR !strcmp($expansionVariable, "item")){
$projectionVariable='';
}
else{
$projectionVariable='?'.$expansionVariable;
}
$offset = $this->getOffset();
$orderBy = $this->getOrderBy();
if (empty($orderBy['orderBy']) AND stristr($template,'ORDER BY')===FALSE) {
$orderBy['orderBy']='ORDER BY ?item';
}
$sparql= "SELECT DISTINCT ?item {$projectionVariable} WHERE {" . "{$template} } {$orderBy['orderBy']}";
if (strcasecmp($limit,"all")!==0) {
$sparql.=" LIMIT {$limit} OFFSET {$offset}";
}
$lens_uri = $this->_request->getParam('_lens');
$ops_uri = $this->_request->getParam('uri');
$sparql = str_replace('?ops_item', '<'.$ops_uri.'>', $sparql);
//$ims = new OpsIms();
//$sparql = $ims->expandQuery($this->addPrefixesToQuery($sparql), $ops_uri, $lens_uri);
$filterGraph = $this->getFilterGraph();
if (!empty($filterGraph)) {
foreach ($filterGraph as $sparqlVar => $filterClause) {
if (preg_match("/VALUES/", $filterClause)===1) {
$sparql=preg_replace("/(WHERE.*?\{)/s", "$1 {$filterClause}", $sparql);
}
else if ( preg_match("/GRAPH[^\}]*?\{[^\}]*?\\".$sparqlVar."/", $sparql)===1 ){
$sparql=preg_replace("/(.*?GRAPH[^\}]*?\{)([^\}]*?\\".$sparqlVar.")/s", "$1 {$filterClause} $2", $sparql);
}
else {
$sparql=preg_replace("/GRAPH *\\".$sparqlVar."/s", "{$filterClause} GRAPH {$sparqlVar} ", $sparql, 1);
}
}
}
$ims = new OpsIms();
$sparql = $ims->expandQuery($this->addPrefixesToQuery($sparql), $ops_uri, $lens_uri);
//$sparql = preg_replace("/\*#\*/","}",$sparql);
$formatter = new VirtuosoFormatter();
# echo $formatter->formatQuery($ims->expandQuery($this->addPrefixesToQuery($sparql), $ops_uri));
$query = $formatter->formatQuery($sparql);
return array('query' => $this->addPrefixesToQuery($query),
'expansionVariable' => $expansionVariable);
} else {
return false;
}
}
private function getGeneratedSelectQuery(){
$GroupGraphPattern = $this->getGroupGraphPattern();
$order = $this->getOrderBy();
$limit = $this->getLimit();
$offset = $this->getOffset();
$fromClause = $this->getFromClause();
$query = <<<_SPARQL_
SELECT DISTINCT ?item
{$fromClause}
WHERE {
{$GroupGraphPattern}
{$order['graphConditions']}
}
{$order['orderBy']}
LIMIT {$limit}
OFFSET {$offset}
_SPARQL_;
return $this->addPrefixesToQuery($query);
}
private function getGroupGraphPattern(){
$whereRequestParam = $this->_request->getParam('_where');
$selectorConfigWhereProperty = $this->getConfigGraph()->getSelectWhere();
$bindings = $this->getConfigGraph()->getAllProcessedVariableBindings();
$selectorConfigWhereProperty = $this->fillQueryTemplate($selectorConfigWhereProperty, $bindings);
if(!empty($whereRequestParam)) $whereRequestParam = '{'.$whereRequestParam.'}';
if(!empty($selectorConfigWhereProperty)) $selectorConfigWhereProperty = '{'.$selectorConfigWhereProperty.'}';
$GGP = "{$whereRequestParam}\n{$selectorConfigWhereProperty}\n ";
$filter = implode( '&', $this->getConfigGraph()->getAllFilters());
foreach($this->_request->getUnreservedParams() as $k => $v){
list($k, $v) = array(urlencode($k), urlencode($v));
$filter.="&{$k}={$v}";
}
logDebug("Filter is: {$filter}");
$params = queryStringToParams($filter);
$langs = array();
foreach($params as $k => $v) {
if (strpos($k, 'lang-') === 0) {
$langs[substr($k, 5)] = $v;
unset($params[$k]);
}
}
$GGP .= $this->paramsToSparql($params, $langs);
$GGP = trim($GGP);
if(empty($GGP)){
$GGP = "\n ?item ?property ?value .";
}
return $GGP;
}
private function paramsToSparql($paramsArray, $langArray=array()){
$sparql = '';
$filters = '';
$namespaces = $this->getConfigGraph()->getPrefixesFromLoadedTurtle();
$rdfsLabelQnameOrUri = $this->qnameOrUri(RDFS_LABEL, $namespaces);
$defaultLangs = $this->getDefaultSelectLangs();
foreach($paramsArray as $k => $v){
$prefix = $this->_parameterPropertyMapper->prefixFromParamName($k);
$propertiesList = $this->_parameterPropertyMapper->mapParamNameToProperties($k);
$propertyNames = $this->_parameterPropertyMapper->paramNameToPropertyNames($k);
$counter=0;
$name = $propertyNames[0];
$varName = $name;
$nextVarName = '';
$propUri = $propertiesList[$name];
$propQnameOrUri = $this->qnameOrUri($propUri, $namespaces);
$lastPropUri = array_pop(array_values($propertiesList));
$langs = array_key_exists($k, $langArray) ? array($langArray[$k]) : $defaultLangs;
$processedFilterValues = $this->filterValueToSparqlTerm($v, $langs, $lastPropUri);
$nValues = count($processedFilterValues);
if(count($propertyNames) > 1){
$sparql.= "\n ?item {$propQnameOrUri} ?{$name} . ";
}
foreach($propertiesList as $name => $propUri){
if(isset($propertyNames[$counter+1]) OR count($propertyNames)==1){ //if this ISN'T the last property or is the only property
if(count($propertyNames)==1){
$varName = 'item';
$nextName = $propertyNames[0];
$nextVarName = $nextName;
} else {
$nextName = $propertyNames[$counter+1];
$nextVarName = $varName.'_'.$nextName;
}
$nextProp = $propertiesList[$nextName];
$nextPropQnameOrUri = $this->qnameOrUri($nextProp, $namespaces);
//need to cast $nextVarName to compare it with $processedFilterValue
$castNextVarName = $this->castOrderByVariable($nextVarName, $nextProp);
if ( (($counter+2) == count($propertyNames) OR count($propertyNames)==1)){ //if last item or only item
if (!$prefix) {
if ($nValues > 1) {
foreach($processedFilterValues as $position => $processedFilterValue) {
if ($position) {
$sparql .= "\n UNION";
}
$sparql.="\n { ?{$varName} {$nextPropQnameOrUri} {$processedFilterValue} . }";
}
} else {
$processedFilterValue = $processedFilterValues[0];
$sparql .= "\n ?{$varName} {$nextPropQnameOrUri} {$processedFilterValue} . ";
}
} else if($prefix=='min') {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . \n FILTER (?{$nextVarName} >= {$processedFilterValues[0]})";
} else if($prefix=='max') {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . \n FILTER (?{$nextVarName} <= {$processedFilterValues[0]})";
} else if($prefix == 'minEx') {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . \n FILTER (?{$nextVarName} > {$processedFilterValues[0]})";
} else if($prefix == 'maxEx') {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . \n FILTER (?{$nextVarName} < {$processedFilterValues[0]})";
} else if($prefix == 'name') {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} .\n";
foreach($processedFilterValues as $position => $processedFilterValue) {
if ($nValues > 1) {
$sparql.="\n {";
}
$sparql.="\n ?{$nextVarName} {$rdfsLabelQnameOrUri} {$processedFilterValue} . ";
if ($nValues > 1) {
$sparql.="\n } ";
if ($position + 1 < $nValues) {
$sparql.="\n UNION ";
}
}
}
} else if($prefix == 'exists') {
if($v=="true"){
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} [] . ";
} else {
$sparql.="\n OPTIONAL { \n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . \n } \n FILTER (!bound(?{$nextVarName})) ";
}
}
} else {
$sparql.="\n ?{$varName} {$nextPropQnameOrUri} ?{$nextVarName} . ";
}
$varName = $nextVarName;
}
$counter++;
}
}
return $sparql;
}
private function castOrderByVariable($varName, $propertyUri){
$xsdDatatypes = array(
XSD."integer" ,
XSD."int" ,
XSD."decimal" ,
XSD."float" ,
XSD."double" ,
XSD."string" ,
XSD."boolean" ,
XSD."dateTime" ,
);
if($propertyRange = $this->getConfigGraph()->getVocabPropertyRange($propertyUri) AND in_array($propertyRange, $xsdDatatypes)){
return "<{$propertyRange}>(?{$varName})";
} else {
return "?{$varName}";
}
}
function getFilterGraph() {
$params = $this->_request->getParams();
$vars = $this->_config->getApiConfigVariableBindings();
$ep_vars = $this->_config->getEndpointConfigVariableBindings();
$filterGraph = array();
$count=1;//TODO ??
foreach ($params as $param_name => $param_value) {
if ($param_name != 'uri' && $param_name != 'uri_list'){
foreach ($vars as $var_name => $var_props) {
if ($param_name==$var_name AND $param_value !=""){
$filterPredicate = $this->findSuperProperty($var_props['uri']);
if ($filterPredicate === API.'graphFilter'){
$this->getFilterGraphForGraphValue($param_value, $var_props, $ep_vars, $filterGraph);
}
elseif (stripos($param_value , "|")!== false){
$this->getFilterGraphForComposedParamValue($param_value, $filterPredicate, $var_props, $ep_vars, $filterGraph);
}
else {
$this->getFilterGraphForParamValue($param_value, $filterPredicate, $var_props, $ep_vars, $filterGraph);
}
}
elseif (stripos($param_name,"min-")!==false AND substr($param_name,4) == $var_name){
$this->getFilterForBoundaryValue($var_props, $var_name, $param_value, '>=', $filterGraph);
$count++;
}
elseif (stripos($param_name,"max-")!==false AND substr($param_name,4) == $var_name){
$this->getFilterForBoundaryValue($var_props, $var_name, $param_value, '<=', $filterGraph);
$count++;
}
elseif (stripos($param_name,"minEx-")!==false AND substr($param_name,6) == $var_name){
$this->getFilterForBoundaryValue($var_props, $var_name, $param_value, '>', $filterGraph);
$count++;
}
elseif (stripos($param_name,"maxEx-")!==false AND substr($param_name,6) == $var_name){
$this->getFilterForBoundaryValue($var_props, $var_name, $param_value, '<', $filterGraph);
$count++;
}
}
}
}
if (!empty($filterGraph)){
return $filterGraph;
}
}
private function getFilterGraphForGraphValue($param_value, $var_props, $ep_vars, &$filterGraph){
if (isset($ep_vars[$param_value]['uri'])) {
$final_param_value="<{$ep_vars[$param_value]['uri']}>";
}
elseif (filter_var($param_value, FILTER_VALIDATE_URL) !== false) {
$final_param_value="<{$param_value}>";
}
elseif (filter_var($param_value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE) !== NULL || is_numeric($param_value)) {
$final_param_value=$param_value;
}
else {
$final_param_value='"' . $param_value . '"';
}
if (isset($filterGraph[$var_props['sparqlVar']])) {
$filterGraph[$var_props['sparqlVar']] .= "VALUES {$var_props['sparqlVar']} { {$final_param_value} }";
}
else {
$filterGraph[$var_props['sparqlVar']] = "VALUES {$var_props['sparqlVar']} { {$final_param_value} }";
}
}
private function getFilterForBoundaryValue($var_props, $var_name, $param_value, $relation, &$filterGraph){
$filterPredicate = $this->findSuperProperty($var_props['uri']);
if (isset($filterGraph[$var_props['sparqlVar']])) {
$filterGraph[$var_props['sparqlVar']] .= "{ " . $var_props['sparqlVar'] . " <" . $filterPredicate . '> ?' . $var_name . " FILTER( ?" . $var_name . ' '.$relation.' ' . $param_value . ' ) *#*';
}
else {
$filterGraph[$var_props['sparqlVar']] = "{ " . $var_props['sparqlVar'] . " <" . $filterPredicate . '> ?' . $var_name . " FILTER( ?" . $var_name . ' '.$relation.' ' . $param_value . ' ) *#*';
}
}
private function getFilterGraphForComposedParamValue($param_value, $filterPredicate, $var_props, $ep_vars, &$filterGraph){
$token = strtok($param_value,'|');
if (isset($ep_vars[$token]['uri'])) {
$token = '<' . $ep_vars[$token]['uri'] . '>';
}
elseif (filter_var($token, FILTER_VALIDATE_URL) !== false) {
$token = '<' . $token . '>';
}
elseif (is_numeric($token)) {
$token = '"' . $token . '"^^<http://www.w3.org/2001/XMLSchema#float>';
}
elseif (filter_var($token, FILTER_VALIDATE_BOOLEAN) !== false) {
$token = $token ;
}
else {
$token = '"' . $token . '"';
}
$filter="{ " . $var_props['sparqlVar'] . " <" . $filterPredicate . '> ' . $token . " *#*";
$token=strtok('|');
while ($token != false){
if (isset($ep_vars[$token]['uri'])) {
$token = '<' . $ep_vars[$token]['uri'] . '>';
}
elseif (filter_var($token, FILTER_VALIDATE_URL) !== false) {
$token = '<' . $token . '>';
}
elseif (is_numeric($token)) {
$token = '"' . $token . '"^^<http://www.w3.org/2001/XMLSchema#float>';
}
elseif (filter_var($token, FILTER_VALIDATE_BOOLEAN) === false) {
$token = '"' . $token . '"';
}
$filter.=" UNION { " . $var_props['sparqlVar'] . " <" . $filterPredicate . '> ' . $token . "*#*";
$token=strtok('|');
}
if (isset($filterGraph[$var_props['sparqlVar']])) {
$filterGraph[$var_props['sparqlVar']].=$filter;
}
else {
$filterGraph[$var_props['sparqlVar']]=$filter;
}
}
private function getFilterGraphForParamValue($param_value, $filterPredicate, $var_props, $ep_vars, &$filterGraph){
if (isset($ep_vars[$param_value]['uri'])) {
$param_value = '<' . $ep_vars[$param_value]['uri'] . '>';
}
elseif (filter_var($param_value, FILTER_VALIDATE_URL) !== false) {
$param_value = '<' . $param_value . '>';
}
else {
if (is_numeric($param_value)) {
$param_value = '"' . $param_value . '"^^<http://www.w3.org/2001/XMLSchema#float>';
}
elseif (filter_var($param_value, FILTER_VALIDATE_BOOLEAN) === false) {
$param_value = '"' . $param_value . '"';
}
}
if (isset($filterGraph[$var_props['sparqlVar']])) {
$filterGraph[$var_props['sparqlVar']] .= '{ ' . $var_props['sparqlVar'] . '<' . $filterPredicate . '> ' . $param_value . ". *#*";
}
else {
$filterGraph[$var_props['sparqlVar']] = '{ ' . $var_props['sparqlVar'] . '<' . $filterPredicate . '> ' . $param_value . ". *#*";
}
}
private function findSuperProperty($variableURI){
$current = $parent = $variableURI;
while ($parent!==null){
$current = $parent;
$parent = $this->_config->get_first_resource($current, RDFS.'subPropertyOf');
}
return $current;
}
function getViewQueryForBatchUriList($itemList, $viewerUri, $uriList=null) {
$ims = new OpsIms();
if(($template = $this->_request->getParam('_template') OR $template = $this->_config->getViewerTemplate($viewerUri)) AND !empty($template)
AND $whereGraph = $this->_config->getViewerWhere($viewerUri) AND !empty($whereGraph)){
$ops_uri = $this->_request->getParam('uri');
$limit = $this->getLimit();
if (strcasecmp($limit,"all")!==0 ) {
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { " . $whereGraph . " }"));
}
else {//_pageSize=all
$whereGraph = $this->_config->getSelectWhere();
$pattern = '@(\?ims_)(.*?)(_uri)@';
$replacement = '?${2}';
$template = preg_replace($pattern, $replacement, $template);
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { {$whereGraph} }"));
$filterGraph = $this->getFilterGraph();
$query = $this->addFilterClause($filterGraph, $query);
//$query = preg_replace("/\*#\*/","}",$query);
$output['expandedQuery'] = $ims->expandQuery($query, $ops_uri, $this->_request->getParam('_lens'));
$output['imsRDF']='';
return $output;
}
if (!empty($ops_uri)){
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $query);
$query = $ims->expandQuery($query, $ops_uri, $this->_request->getParam('_lens'));
//logDebug("View query before filter: ".$query);
}
logDebug("View query after filter: ".$query);
if (!empty($uriList)){//expand another variable besides ?item
if ($this->_config->getEndpointType() == API.'IntermediateExpansionEndpoint' AND strcasecmp($limit,"all")!==0) {
$expandedQuery = $this->addItemsToExpandedQuery($query, $itemList);
}
else{
$expandedQuery = $query;
}
return $ims->expandBatchQuery($expandedQuery, $uriList, $this->_request->getParam('_lens'));
}
else{
if (count($itemList) > 25) {
foreach (array_chunk($itemList,25) AS $key => $chunk) {
$queries[]=$ims->expandBatchQuery($query, $chunk, $this->_request->getParam('_lens'));
}
return $queries;
} else {
return $ims->expandBatchQuery($query, $itemList, $this->_request->getParam('_lens'));
}
}
}
}
function getViewQueryForUri($uri, $viewerUri){
return $this->getViewQueryForUriList(array($uri), $viewerUri);
}
function getViewQueryForUriList($uriList, $viewerUri){
$fromClause = $this->getFromClause();
#Antonis botch
$limit = $this->getLimit();
if(($template = $this->_request->getParam('_template') OR $template = $this->_config->getViewerTemplate($viewerUri)) AND !empty($template)
AND $whereGraph = $this->_config->getViewerWhere($viewerUri) AND !empty($whereGraph)
AND $ops_uri = $this->_request->getParam('uri') AND !empty($ops_uri)){
$query='Something went wrong';
if ($this->_config->getEndpointType() == API.'ListEndpoint' AND strcasecmp($limit,"all")!==0 ) {
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { " . $whereGraph . " }"));
}
elseif ($this->_config->getEndpointType() == API.'ListEndpoint' AND strcasecmp($limit,"all")== 0 ) {
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { {$whereGraph} }"));
$filterGraph = $this->getFilterGraph();
$query = $this->addFilterClause($filterGraph, $query);
//$query = preg_replace("/\*#\*/","}",$query);
}
else {
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { {$whereGraph} }"));
$filterGraph = $this->getFilterGraph();
$query = $this->addFilterClause($filterGraph, $query);
//$query = preg_replace("/\*#\*/","}",$query);
}
$ims = new OpsIms();
$expandedQuery = $ims->expandQuery($query, $ops_uri, $this->_request->getParam('_lens'));
if ($this->_config->getEndpointType() == API.'ListEndpoint' AND strcasecmp($limit,"all")!==0) {
$expandedQuery = $this->addItemsToExpandedQuery($expandedQuery, $uriList);
}
$formatter = new VirtuosoFormatter();
return $formatter->formatQuery($expandedQuery);
} else if(($template = $this->_request->getParam('_template') OR $template = $this->_config->getViewerTemplate($viewerUri)) AND !empty($template)){
$query = $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { {$this->_config->getViewerWhere($viewerUri)} }");
$filterGraph = $this->getFilterGraph();
$query = $this->addFilterClause($filterGraph, $query);
//$query = preg_replace("/\*#\*/","}",$query);
$ims = new OpsIms();
$expandedQuery = $ims->expandQuery($query, $ops_uri, $this->_request->getParam('_lens'));
if (strstr($expandedQuery, "?item")!==FALSE AND strcasecmp($limit,"all")!==0) {
$expandedQuery = $this->addItemsToExpandedQuery($expandedQuery, $uriList);
}
elseif ($this->_config->getEndpointType() == API.'ListEndpoint' AND strcasecmp($limit,"all")== 0 ) {
$query = str_replace('?ops_item', '<'.$ops_uri.'>', $this->addPrefixesToQuery("CONSTRUCT { {$template} } {$fromClause} WHERE { {$whereGraph} }"));
$query = $this->addFilterClause($filterGraph, $query);
//$query = preg_replace("/\*#\*/","}",$query);
$ims = new OpsIms();
$expandedQuery = $ims->expandQuery($query, $ops_uri, $this->_request->getParam('_lens'));
}
$formatter = new VirtuosoFormatter();
return $formatter->formatQuery($expandedQuery);
} else if($viewerUri==API.'describeViewer' AND strlen($this->_request->getParam('_properties')) === 0 ){
return 'DESCRIBE <'.implode('> <', $uriList).'>'.$fromClause;
} else {
$namespaces = $this->getConfigGraph()->getPrefixesFromLoadedTurtle();
$conditionsGraph = '';
$whereGraph = '';
$chains = $this->getViewerPropertyChains($viewerUri);
$props = array();
foreach($chains as $chain) {
$props = $this->mapPropertyChainToStructure($chain, $props);
}
foreach ($uriList as $position => $uri) {
if ($position) {
$whereGraph .= " UNION\n";
}
$conditionsGraph .= "\n # constructing properties of {$uri} \n";
$whereGraph .= "\n # identifying properties of {$uri} \n";
$counter = 0;
foreach ($props as $prop => $substruct) {
if ($counter) {
$whereGraph .= "UNION {\n";
} else {
$whereGraph .= " {\n";
}
$propvar = $substruct['var'] . '_' . $position;
$invProps = false;
if ($prop == API.'allProperties') {
$triple = " <{$uri}> {$propvar}_prop {$propvar} .\n";
} else {
if($invProps = $this->getConfigGraph()->getInverseOfProperty($prop)){
$inverseTriple="#Inverse Mappings \n\n";
foreach($invProps as $no => $invProp){
$invPropQnameOrUri = $this->qnameOrUri($invProp, $namespaces);
$inverseTriple.= "{\n {$propvar} {$invPropQnameOrUri} <{$uri}> . \n ";
if (array_key_exists('props', $substruct)) {
$inverseTriple .= $this->mapPropertyStructureToWhereGraph($substruct, $position, $namespaces);
}
$inverseTriple .= "}";
if($no!=(count($invProps)-1)){
$inverseTriple.= " UNION ";
}
}
}
$propQnameOrUri = $this->qnameOrUri($prop, $namespaces);
$triple = " <{$uri}> {$propQnameOrUri} {$propvar} .\n";
}
$whereGraph .= ($invProps)? $inverseTriple : $triple;
$conditionsGraph .= $triple;
if (array_key_exists('props', $substruct)) {
if(!$invProps) $whereGraph .= $this->mapPropertyStructureToWhereGraph($substruct, $position, $namespaces);
$conditionsGraph .= $this->mapPropertyStructureToConstructGraph($substruct, $position, $namespaces);
}
$whereGraph .= " } ";
$counter += 1;
}
}
return $this->addPrefixesToQuery("CONSTRUCT { {$conditionsGraph}} $fromClause WHERE { {$whereGraph}\n}\n");
}
}
private function addFilterClause($filterGraph, $query){
if (!empty($filterGraph)) {
foreach ($filterGraph as $sparqlVar => $filterClause) {
if (preg_match("/VALUES/", $filterClause)===1) {
$query=preg_replace("/(WHERE.*?\{)/s", "$1 {$filterClause}", $query);
}
else if ( preg_match("/GRAPH[^\}]*?\{[^\}]*?\\".$sparqlVar."/", $query)===1 ){
$query=preg_replace("/(.*?GRAPH[^\}]*?\{)([^\}]*?\\".$sparqlVar.")/s", "$1 {$filterClause} $2", $query);
}
else if ( preg_match("/OPTIONAL[^\}]*?\{[^\}]*?\\".$sparqlVar."/", $query)===1 ){
$query=preg_replace("/(.*?OPTIONAL[^\}]*?\{)([^\}]*?\\".$sparqlVar.")/s", "$1 {$filterClause} $2", $query, 1);
}
else {
$query=preg_replace("/(WHERE.*?)(GRAPH[^\}]*[^\}]*?\\".$sparqlVar.")/s", "$1 {$filterClause} $2", $query, 1);
}
}
}
return $query;
}
private function addItemsToExpandedQuery($expandedQuery, $uriList){
$sparqlVar="?item";
$filterGraph = "VALUES ?item { ";
foreach($uriList as $uri) {
$filterGraph .= " <{$uri}> ";
}
$filterGraph .= "}";
#$expandedQuery = preg_replace("/(WHERE.*?\{)/s", "$1 {$filterGraph}",$expandedQuery,1);
$expandedQuery=preg_replace("/(WHERE.*?GRAPH[^\}]*?\{)([^\}]*?\\".$sparqlVar.")/s", "$1 {$filterGraph} $2", $expandedQuery, 1);
return $expandedQuery;
}
private function getFromClause(){
$graphNames = '';
foreach($this->getConfigGraph()->getSparqlEndpointGraphs() as $graphUri){
$graphNames.="FROM <{$graphUri}>\n";
}
return $graphNames;
}
/**
* Builds the query that inserts data into a graph
*
* @param string $rdfData
* @param string $graphName
* @return string
*/
function getInsertQueryForExternalServiceData($rdfData, $graphName){
$query = "INSERT IN GRAPH <{$graphName}>{".$rdfData."}";
return $query;
}
/**
* Build query that retrieves all the information from a certain graph
*
* @param string $graphName
* @param string $viewerUri
* @return string
*/
function getViewQueryForExternalService($graphName, $pageUri, $viewerUri){
$pageUri = preg_replace('/\|/','%7C', $pageUri);
//get the template query from the config
$template = $this->_config->getViewerTemplate($viewerUri);
//fill in pageUri
$template = str_replace("{pageUri}", '<'.$pageUri.'>', $template);
//get the where template from the config
$whereGraphTemplate = $this->_config->getViewerWhere($viewerUri);
//fill in the graph name
$whereGraph = str_replace("{result_hash}", $graphName, $whereGraphTemplate);
$query = "CONSTRUCT { {$template} } WHERE { {$whereGraph} }";
$finalQuery = $this->addPrefixesToQuery($query);
return $finalQuery;
}
private function mapPropertyStructureToWhereGraph($structure, $uriPosition, $namespaces) {
$var = $structure['var'];
$props = $structure['props'];
$graph = '';
foreach($props as $prop => $substruct) {
$propvar = $substruct['var'] . '_' . $uriPosition;
if ($prop == API.'allProperties') {
$graph .= " OPTIONAL { {$var}_{$uriPosition} {$propvar}_prop {$propvar} .";
} else {
$propQnameOrUri = $this->qnameOrUri($prop, $namespaces);
if($invProps = $this->getConfigGraph()->getInverseOfProperty($prop)){
$inverseTriple="#Inverse Mappings \n\n";
foreach($invProps as $no => $invProp){
$invPropQnameOrUri = $this->qnameOrUri($invProp, $namespaces);
$graph .= "\n OPTIONAL { {$propvar} {$invPropQnameOrUri} {$var}_{$uriPosition} .";
if (array_key_exists('props', $substruct)) {
$graph .= $this->mapPropertyStructureToWhereGraph($substruct, $uriPosition, $namespaces);
}
$graph .= "}";
}
}
$graph .= " OPTIONAL { {$var}_{$uriPosition} {$propQnameOrUri} {$propvar} .";
}
if (array_key_exists('props', $substruct)) {
$graph .= $this->mapPropertyStructureToWhereGraph($substruct, $uriPosition, $namespaces);
}
$graph .= " }\n";
}
return $graph;
}
private function mapPropertyStructureToConstructGraph($structure, $uriPosition, $namespaces) {
$var = $structure['var'];
$props = $structure['props'];
$graph = '';
foreach($props as $prop => $substruct) {
$propvar = $substruct['var'] . '_' . $uriPosition;
if ($prop == API.'allProperties') {
$graph .= " {$var}_{$uriPosition} {$propvar}_prop {$propvar} .\n";
} else {
$propQnameOrUri = $this->qnameOrUri($prop, $namespaces);
/* if($invProp = $this->getConfigGraph()->getInverseOfProperty($prop)){
$invPropQnameOrUri = $this->qnameOrUri($invPropQnameOrUri, $namespaces);
$graph .= "\n {$propvar} {$propQnameOrUri} {$var}_{$uriPosition} . \n # inverse property mapping \n";
}
*/
$graph .= " {$var}_{$uriPosition} {$propQnameOrUri} {$propvar} .\n";
}
if (array_key_exists('props', $substruct)) {
$graph .= $this->mapPropertyStructureToConstructGraph($substruct, $uriPosition, $namespaces);
}
}
return $graph;
}
/*
Creating a structure that looks like:
array(
"var" => "?s",
"props" => array(
rdfs:label => array("var" => "?var_1"),
org:reportsTo => array(
"var" => "?var_2",
"props" => array(
rdfs:label => array("var" => "?var_2_1")
)
)
)
)
*/
private function mapPropertyChainToStructure($chain, $structure, $varbase = '?var') {
$prop = array_shift($chain);
if (array_key_exists($prop, $structure)) {
$varbase = $structure[$prop]['var'];
} else {
$varbase = $varbase . '_' . (count($structure) + 1);
$structure[$prop] = array('var' => $varbase, 'props' => array());
}
if (count($chain) != 0) {
$structure[$prop]['props'] = $this->mapPropertyChainToStructure($chain, $structure[$prop]['props'], $varbase);
}
return $structure;
}
private function getViewerPropertyChains($viewerUri){
return array_merge($this->getConfigGraph()->getRequestPropertyChainArray(), $this->getConfigGraph()->getViewerDisplayPropertiesValueAsPropertyChainArray($viewerUri), $this->getConfigGraph()->getAllViewerPropertyChains($viewerUri));
}
private function qnameOrUri($uri, $prefixes) {
$hash = strpos($uri, '#');
if (!$hash) {
$parts = explode('/', $uri);
$localPart = $parts[count($parts) - 1];
$namespace = substr($uri, 0, strlen($uri) - strlen($localPart));
} else {
$localPart = substr($uri, $hash + 1);
$namespace = substr($uri, 0, $hash + 1);
}
foreach ($prefixes as $prefix=>$ns) {
if ($ns == $namespace) {
return $prefix.':'.$localPart;
}
}
return '<'.$uri.'>';
}
function getConfigGraph(){
return $this->_config;
}
}
?>