70 lines
1.4 KiB
PHP
70 lines
1.4 KiB
PHP
<?php
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/**
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* @ingroup SMWDataItems
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*/
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use SMW\Exception\DataItemException;
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/**
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* This class implements Boolean data items.
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*
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* @since 1.6
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*
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* @author Markus Krötzsch
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* @ingroup SMWDataItems
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*/
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class SMWDIBoolean extends SMWDataItem {
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/**
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* Internal value.
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* @var bool
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*/
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protected $m_boolean;
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public function __construct( $boolean ) {
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if ( !is_bool( $boolean ) ) {
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throw new DataItemException( "Initialization value '$boolean' is not a boolean." );
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}
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$this->m_boolean = ( $boolean == true );
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}
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public function getDIType() {
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return SMWDataItem::TYPE_BOOLEAN;
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}
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public function getBoolean() {
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return $this->m_boolean;
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}
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public function getSerialization() {
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return $this->m_boolean ? 't' : 'f';
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}
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public function getSortKey() {
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return $this->m_boolean ? 1 : 0;
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}
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/**
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* Create a data item from the provided serialization string and type
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* ID.
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* @return SMWDIBoolean
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*/
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public static function doUnserialize( $serialization ) {
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if ( $serialization == 't' ) {
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return new SMWDIBoolean( true );
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} elseif ( $serialization == 'f' ) {
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return new SMWDIBoolean( false );
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} else {
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throw new DataItemException( "Boolean data item unserialised from illegal value '$serialization'" );
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}
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}
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public function equals( SMWDataItem $di ) {
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if ( $di->getDIType() !== SMWDataItem::TYPE_BOOLEAN ) {
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return false;
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}
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return $di->getBoolean() === $this->m_boolean;
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}
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}
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