/** Serialize the converted UCB Memorial Data content into different serialization formats
@return returns the serialized content
@author Frederick Giasson, Structured Dynamics LLC.
*/
public function pipeline_serialize()
{
$rdf_part = "";
switch ($this->conneg->getMime()) {
case "application/x-bibtex":
$bibtex = "";
$xml = new ProcessorXML();
$xml->loadXML($this->pipeline_getResultset());
$subjects = $xml->getSubjects();
$nbConvertedItems = 0;
foreach ($subjects as $subject) {
$subjectURI = $xml->getURI($subject);
$subjectType = $xml->getType($subject);
// Check if the type of this subject is mappable to BibTeX
$subjectType = $this->get_uri_label($subjectType);
if (($bibType = array_search($subjectType, $this->bibTypes)) !== FALSE) {
$bibtex .= "@" . $bibType . "{" . $subjectURI . " \n";
} else {
// If the type is unknow as a bibtex type, then we continue and doesnt convert that subject.
continue;
}
// Check if the properties of this subject are mappable to BibTeX
$predicates = $xml->getPredicates($subject);
foreach ($predicates as $predicate) {
$objects = $xml->getObjects($predicate);
$predicateType = $this->get_uri_label($xml->getType($predicate));
$bibPropertyType;
if (($bibPropertyType = array_search($predicateType, $this->bibProperties)) === FALSE) {
// If the predicate is unmappable, we skip it
continue;
}
$nbConvertedItems++;
foreach ($objects as $object) {
$objectType = $xml->getType($object);
if ($objectType == "rdfs:Literal") {
$objectValue = $xml->getContent($object);
$bibtex .= " {$bibPropertyType} = \"{$objectValue}\",\n";
} else {
$objectLabel = $xml->getLabel($object);
if ($objectLabel == "") {
$objectURI = $xml->getURI($object);
$bibtex .= " {$bibPropertyType} = \"{$objectURI}\",\n";
} else {
$bibtex .= " {$bibPropertyType} = \"{$objectLabel}\",\n";
}
}
}
}
$bibtex .= "}\n";
}
if ($nbConvertedItems == 0) {
$this->conneg->setStatus(400);
$this->conneg->setStatusMsg("Bad Request");
$this->conneg->setStatusMsgExt("No BibTex data converted");
return;
}
return $bibtex;
break;
case "application/rdf+n3":
$xml = new ProcessorXML();
$xml->loadXML($this->pipeline_getResultset());
$subjects = $xml->getSubjects();
foreach ($subjects as $subject) {
$subjectURI = $xml->getURI($subject);
$subjectType = $xml->getType($subject);
$rdf_part .= "\n <{$subjectURI}> a {$subjectType} ;\n";
$predicates = $xml->getPredicates($subject);
foreach ($predicates as $predicate) {
$objects = $xml->getObjects($predicate);
foreach ($objects as $object) {
$objectType = $xml->getType($object);
$predicateType = $xml->getType($predicate);
if ($objectType == "rdfs:Literal") {
$objectValue = $xml->getContent($object);
$rdf_part .= " {$predicateType} \"\"\"" . str_replace(array("\\"), "\\\\", $objectValue) . "\"\"\" ;\n";
} else {
$objectURI = $xml->getURI($object);
$rdf_part .= " {$predicateType} <{$objectURI}> ;\n";
}
}
}
if (strlen($rdf_part) > 0) {
$rdf_part = substr($rdf_part, 0, strlen($rdf_part) - 2) . ".\n";
}
}
return $rdf_part;
break;
case "application/rdf+xml":
$xml = new ProcessorXML();
$xml->loadXML($this->pipeline_getResultset());
$subjects = $xml->getSubjects();
foreach ($subjects as $subject) {
$subjectURI = $xml->getURI($subject);
$subjectType = $xml->getType($subject);
$rdf_part .= "\n <{$subjectType} rdf:about=\"" . $this->xmlEncode($subjectURI) . "\">\n";
$predicates = $xml->getPredicates($subject);
foreach ($predicates as $predicate) {
$objects = $xml->getObjects($predicate);
foreach ($objects as $object) {
$objectType = $xml->getType($object);
$predicateType = $xml->getType($predicate);
if ($objectType == "rdfs:Literal") {
$objectValue = $xml->getContent($object);
$rdf_part .= " <{$predicateType}>" . $this->xmlEncode($objectValue) . "</{$predicateType}>\n";
} else {
$objectURI = $xml->getURI($object);
$rdf_part .= " <{$predicateType} rdf:resource=\"" . $this->xmlEncode($objectURI) . "\" />\n";
}
}
}
$rdf_part .= " </{$subjectType}>\n";
}
return $rdf_part;
break;
}
}
