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<?php
namespace SMW\SQLStore\EntityStore\DIHandlers;
use SMW\DIConcept;
use SMW\SQLStore\EntityStore\DataItemHandler;
use SMW\SQLStore\EntityStore\Exception\DataItemHandlerException;
use SMW\SQLStore\TableBuilder\FieldType;
use SMWDataItem as DataItem;
/**
* This class implements Store access to Concept data items.
*
* @note The table layout and behavior of this class is not coherent with the
* way that other DIs work. This is because of the unfortunate use of the
* concept table to store extra cache data, but also due to the design of
* concept DIs. This will be cleaned up at some point.
*
* @license GNU GPL v2+
* @since 1.8
*
* @author Nischay Nahata
*/
class DIConceptHandler extends DataItemHandler {
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getTableFields() {
return [
'concept_txt' => FieldType::TYPE_BLOB,
'concept_docu' => FieldType::TYPE_BLOB,
'concept_features' => FieldType::FIELD_NAMESPACE,
'concept_size' => FieldType::FIELD_NAMESPACE,
'concept_depth' => FieldType::FIELD_NAMESPACE,
'cache_date' => FieldType::TYPE_INT_UNSIGNED,
'cache_count' => FieldType::TYPE_INT_UNSIGNED
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getFetchFields() {
return [
'concept_txt' => FieldType::TYPE_BLOB,
'concept_docu' => FieldType::TYPE_BLOB,
'concept_features' => FieldType::FIELD_NAMESPACE,
'concept_size' => FieldType::FIELD_NAMESPACE,
'concept_depth' => FieldType::FIELD_NAMESPACE,
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getWhereConds( DataItem $dataItem ) {
return [
'concept_txt' => $dataItem->getConceptQuery(),
'concept_docu' => $dataItem->getDocumentation(),
'concept_features' => $dataItem->getQueryFeatures(),
'concept_size' => $dataItem->getSize(),
'concept_depth' => $dataItem->getDepth()
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getInsertValues( DataItem $dataItem ) {
return [
'concept_txt' => $dataItem->getConceptQuery(),
'concept_docu' => $dataItem->getDocumentation(),
'concept_features' => $dataItem->getQueryFeatures(),
'concept_size' => $dataItem->getSize(),
'concept_depth' => $dataItem->getDepth()
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getIndexField() {
return 'concept_txt';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getLabelField() {
return 'concept_txt';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function dataItemFromDBKeys( $dbkeys ) {
if ( is_array( $dbkeys) && count( $dbkeys ) == 5 ) {
return new DIConcept(
$dbkeys[0],
smwfXMLContentEncode( $dbkeys[1] ),
$dbkeys[2],
$dbkeys[3],
$dbkeys[4]
);
}
throw new DataItemHandlerException( 'Failed to create data item from DB keys.' );
}
}
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