public function SelectFeatures($resId, $schemaName, $className, $format)
{
//Check for unsupported representations
$fmt = $this->ValidateRepresentation($format, array("xml", "html", "geojson"));
$mimeType = $this->GetMimeTypeForFormat($fmt);
try {
$sessionId = "";
if ($resId->GetRepositoryType() == MgRepositoryType::Session) {
$sessionId = $resId->GetRepositoryName();
}
$this->EnsureAuthenticationForSite($sessionId, true, $mimeType);
$siteConn = new MgSiteConnection();
$siteConn->Open($this->userInfo);
$site = $siteConn->GetSite();
$this->VerifyWhitelist($resId->ToString(), $mimeType, "SELECTFEATURES", $fmt, $site, $this->userName);
$featSvc = $siteConn->CreateService(MgServiceType::FeatureService);
$query = new MgFeatureQueryOptions();
$filter = $this->GetRequestParameter("filter", "");
$propList = $this->GetRequestParameter("properties", "");
$orderby = $this->GetRequestParameter("orderby", "");
$orderOptions = $this->GetRequestParameter("orderoption", "asc");
$maxFeatures = $this->GetRequestParameter("maxfeatures", "");
$transformto = $this->GetRequestParameter("transformto", "");
$bbox = $this->GetRequestParameter("bbox", "");
$pageSize = $this->GetRequestParameter("pagesize", -1);
$pageNo = $this->GetRequestParameter("page", -1);
//Internal debugging flag
$chunk = $this->GetBooleanRequestParameter("chunk", true);
if ($pageNo >= 0 && $pageSize === -1) {
$this->BadRequest($this->app->localizer->getText("E_MISSING_REQUIRED_PARAMETER", "pagesize"), $mimeType);
}
if ($filter !== "") {
$query->SetFilter($filter);
}
$limit = -1;
if ($maxFeatures !== "") {
$limit = intval($maxFeatures);
}
if ($propList !== "") {
$propNames = explode(",", $propList);
//If you have a comma in your property names, it's your own fault :)
foreach ($propNames as $propName) {
$query->AddFeatureProperty($propName);
}
}
if ($orderby !== "") {
$orderPropNames = explode(",", $orderby);
//If you have a comma in your property names, it's your own fault :)
$orderProps = new MgStringCollection();
foreach ($orderPropNames as $propName) {
$orderProps->Add($propName);
}
$orderOpt = MgOrderingOption::Ascending;
if (strtolower($orderOptions) === "desc") {
$orderOpt = MgOrderingOption::Descending;
}
$query->SetOrderingFilter($orderProps, $orderOpt);
}
$transform = null;
if ($transformto !== "") {
$transform = MgUtils::GetTransform($featSvc, $resId, $schemaName, $className, $transformto);
}
if ($bbox !== "") {
$parts = explode(",", $bbox);
if (count($parts) == 4) {
$wktRw = new MgWktReaderWriter();
$geom = $wktRw->Read(MgUtils::MakeWktPolygon($parts[0], $parts[1], $parts[2], $parts[3]));
//Transform the bbox if we have the flag indicating so
$bboxIsTargetCs = $this->GetBooleanRequestParameter("bboxistargetcs", false);
if ($bboxIsTargetCs) {
//Because it has been declared the bbox is in target coordiantes, we have to transform that bbox back to the
//source, which means we need an inverse transform
$invTx = MgUtils::GetTransform($featSvc, $resId, $schemaName, $className, $transformto, true);
$geom = $geom->Transform($invTx);
}
$clsDef = $featSvc->GetClassDefinition($resId, $schemaName, $className);
$query->SetSpatialFilter($clsDef->GetDefaultGeometryPropertyName(), $geom, MgFeatureSpatialOperations::EnvelopeIntersects);
}
}
$reader = $featSvc->SelectFeatures($resId, "{$schemaName}:{$className}", $query);
$owriter = null;
if ($chunk === "0") {
$owriter = new MgSlimChunkWriter($this->app);
} else {
$owriter = new MgHttpChunkWriter();
}
if ($pageSize > 0) {
if ($pageNo < 1) {
$pageNo = 1;
}
$pageReader = new MgPaginatedFeatureReader($reader, $pageSize, $pageNo, $limit);
$result = new MgReaderChunkedResult($featSvc, $pageReader, $limit, $owriter, $this->app->localizer);
} else {
$result = new MgReaderChunkedResult($featSvc, $reader, $limit, $owriter, $this->app->localizer);
}
$result->CheckAndSetDownloadHeaders($this->app, $format);
if ($transform != null) {
$result->SetTransform($transform);
}
if ($fmt === "html") {
$result->SetHtmlParams($this->app);
}
$result->Output($format);
} catch (MgException $ex) {
$this->OnException($ex, $mimeType);
}
}
/**
* Queries the configured feature source and returns a MgReader based on the current GET query parameters and adapter configuration
*/
protected function CreateQueryOptions($single)
{
$query = new MgFeatureQueryOptions();
$this->EnsureQualifiedClassName();
$tokens = explode(":", $this->className);
$clsDef = null;
$clsDef = $this->featSvc->GetClassDefinition($this->featureSourceId, $tokens[0], $tokens[1]);
if ($single === true) {
if ($this->featureId == null) {
throw new Exception($this->app->localizer->getText("E_NO_FEATURE_ID_SET"));
}
$idType = MgPropertyType::String;
if ($this->featureIdProp == null) {
$idProps = $clsDef->GetIdentityProperties();
if ($idProps->GetCount() == 0) {
throw new Exception($this->app->localizer->getText("E_CANNOT_QUERY_NO_ID_PROPS", $this->className, $this->featureSourceId->ToString()));
} else {
if ($idProps->GetCount() > 1) {
throw new Exception($this->app->localizer->getText("E_CANNOT_QUERY_MULTIPLE_ID_PROPS", $this->className, $this->featureSourceId->ToString()));
} else {
$idProp = $idProps->GetItem(0);
$this->featureIdProp = $idProp->GetName();
$idType = $idProp->GetDataType();
}
}
} else {
$props = $clsDef->GetProperties();
$iidx = $props->IndexOf($this->featureIdProp);
if ($iidx >= 0) {
$propDef = $props->GetItem($iidx);
if ($propDef->GetPropertyType() != MgFeaturePropertyType::DataProperty) {
throw new Exception($this->app->localizer->getText("E_ID_PROP_NOT_DATA", $this->featureIdProp));
}
} else {
throw new Exception($this->app->localizer->getText("E_ID_PROP_NOT_FOUND", $this->featureIdProp));
}
}
if ($idType == MgPropertyType::String) {
$query->SetFilter($this->featureIdProp . " = '" . $this->featureId . "'");
} else {
$query->SetFilter($this->featureIdProp . " = " . $this->featureId);
}
} else {
$flt = $this->app->request->get("filter");
if ($flt != null) {
$query->SetFilter($flt);
}
$bbox = $this->app->request->get("bbox");
if ($bbox != null) {
$parts = explode(",", $bbox);
if (count($parts) == 4) {
$wktRw = new MgWktReaderWriter();
$geom = $wktRw->Read(MgUtils::MakeWktPolygon($parts[0], $parts[1], $parts[2], $parts[3]));
$query->SetSpatialFilter($clsDef->GetDefaultGeometryPropertyName(), $geom, MgFeatureSpatialOperations::EnvelopeIntersects);
}
}
}
if (isset($this->app->ComputedProperties)) {
$compProps = $this->app->ComputedProperties;
foreach ($compProps as $alias => $expression) {
$this->computedPropertyList[$alias] = $expression;
}
}
$bAppliedComputedProperties = false;
if (count($this->computedPropertyList) > 0) {
foreach ($this->computedPropertyList as $alias => $expression) {
$query->AddComputedProperty($alias, $expression);
$bAppliedComputedProperties = true;
}
}
//If computed properties were applied, add all properties from the class definition if no
//explicit property list supplied
if ($bAppliedComputedProperties && count($this->propertyList) == 0) {
$clsProps = $clsDef->GetProperties();
for ($i = 0; $i < $clsProps->GetCount(); $i++) {
$propDef = $clsProps->GetItem($i);
$query->AddFeatureProperty($propDef->GetName());
}
} else {
if (count($this->propertyList) > 0) {
foreach ($this->propertyList as $propName) {
$query->AddFeatureProperty($propName);
}
}
}
$orderby = $this->app->request->get("orderby");
$orderOptions = $this->app->request->get("orderoption");
if ($orderby != null) {
if ($orderOptions == null) {
$orderOptions = "asc";
}
$orderPropNames = explode(",", $orderby);
//If you have a comma in your property names, it's your own fault :)
$orderProps = new MgStringCollection();
foreach ($orderPropNames as $propName) {
$orderProps->Add($propName);
}
$orderOpt = MgOrderingOption::Ascending;
if (strtolower($orderOptions) === "desc") {
$orderOpt = MgOrderingOption::Descending;
}
$query->SetOrderingFilter($orderProps, $orderOpt);
}
return $query;
}