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<?php
/**
* @ingroup SMWDataItems
*/
use SMW\Exception\DataItemException;
/**
* This class implements number data items.
*
* @since 1.6
*
* @author Markus Krötzsch
* @ingroup SMWDataItems
*/
class SMWDINumber extends SMWDataItem {
/**
* Internal value.
* @var float|int
*/
protected $m_number;
public function __construct( $number ) {
if ( !is_numeric( $number ) ) {
throw new DataItemException( "Initialization value '$number' is not a number." );
}
$this->m_number = $number;
}
public function getDIType() {
return SMWDataItem::TYPE_NUMBER;
}
public function getNumber() {
return $this->m_number;
}
public function getSortKey() {
return $this->m_number;
}
/**
* @see SMWDataItem::getSortKeyDataItem()
* @return SMWDataItem
*/
public function getSortKeyDataItem() {
return $this;
}
public function getSerialization() {
return strval( $this->m_number );
}
/**
* Create a data item from the provided serialization string and type
* ID.
* @note PHP can convert any string to some number, so we do not do
* validation here (because this would require less efficient parsing).
* @return SMWDINumber
*/
public static function doUnserialize( $serialization ) {
return new SMWDINumber( floatval( $serialization ) );
}
public function equals( SMWDataItem $di ) {
if ( $di->getDIType() !== SMWDataItem::TYPE_NUMBER ) {
return false;
}
return $di->getNumber() === $this->m_number;
}
}
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