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<?php
namespace SMW\SQLStore\EntityStore\DIHandlers;
use SMW\SQLStore\EntityStore\DataItemHandler;
use SMW\SQLStore\EntityStore\Exception\DataItemHandlerException;
use SMW\SQLStore\TableBuilder\FieldType;
use SMWDataItem as DataItem;
use SMWDIUri as DIUri;
/**
* This class implements Store access to Uri data items.
*
* @license GNU GPL v2+
* @since 1.8
*
* @author Nischay Nahata
*/
class DIUriHandler extends DataItemHandler {
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getTableFields() {
return [
'o_blob' => FieldType::TYPE_BLOB,
'o_serialized' => $this->getCharFieldType()
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getFetchFields() {
return [
'o_blob' => FieldType::TYPE_BLOB,
'o_serialized' => $this->getCharFieldType()
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getTableIndexes() {
return [
'p_id,o_serialized',
];
}
/**
* @since 3.0
*
* {@inheritDoc}
*/
public function getIndexHint( $key ) {
// SELECT smw_id, smw_title, smw_namespace, smw_iw, smw_subobject, smw_sortkey, smw_sort
// FROM `smw_object_ids`
// INNER JOIN `smw_di_uri` AS t1
// FORCE INDEX(s_id) ON t1.s_id=smw_id
// WHERE t1.p_id='310165' AND smw_iw!=':smw' AND smw_iw!=':smw-delete' AND smw_iw!=':smw-redi'
// GROUP BY smw_sort, smw_id LIMIT 26
//
// 606.8370ms SMWSQLStore3Readers::getPropertySubjects
//
// vs.
//
// SELECT smw_id, smw_title, smw_namespace, smw_iw, smw_subobject, smw_sortkey, smw_sort
// FROM `smw_object_ids`
// INNER JOIN `smw_di_uri` AS t1 ON t1.s_id=smw_id
// WHERE t1.p_id='310165' AND smw_iw!=':smw' AND smw_iw!=':smw-delete' AND smw_iw!=':smw-redi'
// GROUP BY smw_sort, smw_id LIMIT 26
//
// 8052.2099ms SMWSQLStore3Readers::getPropertySubjects
if ( 'property.subjects' && $this->isDbType( 'mysql' ) ) {
return 's_id';
}
return '';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getWhereConds( DataItem $dataItem ) {
return [ 'o_serialized' => rawurldecode( $dataItem->getSerialization() ) ];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getInsertValues( DataItem $dataItem ) {
$serialization = rawurldecode( $dataItem->getSerialization() );
$text = mb_strlen( $serialization ) <= $this->getMaxLength() ? null : $serialization;
// bytea type handling
if ( $text !== null && $this->isDbType( 'postgres' ) ) {
$text = pg_escape_bytea( $text );
}
return [
'o_blob' => $text,
'o_serialized' => $serialization,
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getIndexField() {
return 'o_serialized';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getLabelField() {
return 'o_serialized';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function dataItemFromDBKeys( $dbkeys ) {
if ( !is_array( $dbkeys ) || count( $dbkeys ) != 2 ) {
throw new DataItemHandlerException( 'Failed to create data item from DB keys.' );
}
if ( $this->isDbType( 'postgres' ) ) {
$dbkeys[0] = pg_unescape_bytea( $dbkeys[0] );
}
return DIUri::doUnserialize( $dbkeys[0] == '' ? $dbkeys[1] : $dbkeys[0] );
}
private function getMaxLength() {
$length = 255;
if ( $this->isEnabledFeature( SMW_FIELDT_CHAR_LONG ) ) {
$length = FieldType::CHAR_LONG_LENGTH;
}
return $length;
}
private function getCharFieldType() {
$fieldType = FieldType::FIELD_TITLE;
if ( $this->isEnabledFeature( SMW_FIELDT_CHAR_NOCASE ) ) {
$fieldType = FieldType::TYPE_CHAR_NOCASE;
}
if ( $this->isEnabledFeature( SMW_FIELDT_CHAR_LONG ) ) {
$fieldType = FieldType::TYPE_CHAR_LONG;
}
if ( $this->isEnabledFeature( SMW_FIELDT_CHAR_LONG ) && $this->isEnabledFeature( SMW_FIELDT_CHAR_NOCASE ) ) {
$fieldType = FieldType::TYPE_CHAR_LONG_NOCASE;
}
return $fieldType;
}
}
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