/**
* Loads the mappings
*/
private function loadMappings()
{
$this->extractor = new ExtractionManager();
//Parse mapping pages
if ($this->allowCaching && file_exists(self::MAPPINGS_FILE)) {
$this->logger->info('Loading mappings from file.');
$mappingExtractor = unserialize(file_get_contents(self::MAPPINGS_FILE));
if ($mappingExtractor && $mappingExtractor->getContext() != $this->context) {
$this->logger->info('Discarding cached mappings as context differs');
unset($mappingExtractor);
} else {
/* Hack: Re-open the quad destination file and assume the context from the extractor */
$mappingExtractor->getContext()->getDestinations()->getDestination('destination id')->open();
$this->context = $mappingExtractor->getContext();
}
}
if (!isset($mappingExtractor)) {
$this->logger->info('Reading mapping definitions...');
$mappingPages = $this->loadAllPages($this->mappingsSource);
$this->logger->info('Building mapping definitions...');
$mappingExtractor = MappingExtractor::load($mappingPages, $this->ontology, $this->context);
$this->destroyAllPages($mappingPages);
file_put_contents(self::MAPPINGS_FILE, serialize($mappingExtractor));
}
$this->extractor->addExtractor($mappingExtractor);
//echo $this->extractor;
}
/**
*
* @param $abstracts should AbstractExtractor be added?
* TODO: Create an interface ExtractorBuilder with methods addProperties() and createExtractor().
* Give this method an array of ExtractorBuilders.
*/
public function loadMappings($ontology, $context, $abstracts = true)
{
$mappingPages = $this->loadAllPages($this->mappingDir);
$extractor = new ExtractionManager();
$extractor->addExtractor(MappingExtractor::load($mappingPages, $ontology, $context));
$extractor->addExtractor(\dbpedia\mapping\LabelExtractor::load($ontology, $context));
if ($abstracts) {
$extractor->addExtractor(\dbpedia\mapping\AbstractExtractor::load($ontology, $context));
}
$this->destroyAllPages($mappingPages);
return $extractor;
}