public function GetSelectedFeatures($sessionId, $mapName, $layerName, $format)
{
$fmt = $this->ValidateRepresentation($format, array("xml", "geojson", "html"));
$propList = $this->GetRequestParameter("properties", "");
$pageSize = $this->GetRequestParameter("pagesize", -1);
$pageNo = $this->GetRequestParameter("page", -1);
$orientation = $this->GetRequestParameter("orientation", "h");
//Internal debugging flag
$chunk = $this->GetBooleanRequestParameter("chunk", true);
try {
$this->EnsureAuthenticationForSite($sessionId);
$siteConn = new MgSiteConnection();
$siteConn->Open($this->userInfo);
$resSvc = $siteConn->CreateService(MgServiceType::ResourceService);
$featSvc = $siteConn->CreateService(MgServiceType::FeatureService);
$map = new MgMap($siteConn);
$map->Open($mapName);
$selection = new MgSelection($map);
$selection->Open($resSvc, $mapName);
$layers = $selection->GetLayers();
if ($layers != null) {
$lidx = -1;
$layerCount = $layers->GetCount();
for ($i = 0; $i < $layerCount; $i++) {
$currentlayer = $layers->GetItem($i);
if ($currentlayer->GetName() == $layerName) {
$lidx = $i;
break;
}
}
if ($lidx < 0) {
$this->NotFound($this->app->localizer->getText("E_LAYER_NOT_IN_SELECTION", $layerName), $this->GetMimeTypeForFormat($fmt));
} else {
$layer = $layers->GetItem($lidx);
$bMapped = $this->GetBooleanRequestParameter("mappedonly", "0") == "1";
$transformto = $this->GetRequestParameter("transformto", "");
$transform = null;
if ($transformto !== "") {
$resId = new MgResourceIdentifier($layer->GetFeatureSourceId());
$tokens = explode(":", $layer->GetFeatureClassName());
$transform = MgUtils::GetTransform($featSvc, $resId, $tokens[0], $tokens[1], $transformto);
}
$owriter = null;
if ($chunk === "0") {
$owriter = new MgSlimChunkWriter($this->app);
} else {
$owriter = new MgHttpChunkWriter();
}
//NOTE: This does not do a query to ascertain a total, this is already a pre-computed property of the selection set.
$total = $selection->GetSelectedFeaturesCount($layer, $layer->GetFeatureClassName());
if (strlen($propList) > 0) {
$tokens = explode(",", $propList);
$propNames = new MgStringCollection();
foreach ($tokens as $propName) {
$propNames->Add($propName);
}
$reader = $selection->GetSelectedFeatures($layer, $layer->GetFeatureClassName(), $propNames);
} else {
$reader = $selection->GetSelectedFeatures($layer, $layer->GetFeatureClassName(), $bMapped);
}
if ($pageSize > 0) {
$pageReader = new MgPaginatedFeatureReader($reader, $pageSize, $pageNo, $total);
$result = new MgReaderChunkedResult($featSvc, $pageReader, -1, $owriter, $this->app->localizer);
} else {
$result = new MgReaderChunkedResult($featSvc, $reader, -1, $owriter, $this->app->localizer);
}
$result->CheckAndSetDownloadHeaders($this->app, $format);
if ($transform != null) {
$result->SetTransform($transform);
}
if ($fmt === "html") {
$result->SetAttributeDisplayOrientation($orientation);
$result->SetHtmlParams($this->app);
}
$result->Output($format);
}
} else {
$owriter = new MgHttpChunkWriter();
$reader = new MgNullFeatureReader();
$result = new MgReaderChunkedResult($featSvc, $reader, -1, $owriter, $this->app->localizer);
if ($fmt === "html") {
$result->SetAttributeDisplayOrientation($orientation);
$result->SetHtmlParams($this->app);
}
$result->Output($format);
}
} catch (MgException $ex) {
$this->OnException($ex, $this->GetMimeTypeForFormat($format));
}
}
