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<?php
namespace SMW\DataValues\ValueFormatters;
use RuntimeException;
use SMWDataValue as DataValue;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.4
*
* @author mwjames
*/
class DispatchingDataValueFormatter {
/**
* @var DataValueFormatter[]
*/
private $dataValueFormatters = [];
/**
* @var DataValueFormatter[]
*/
private $defaultDataValueFormatters = [];
/**
* @since 2.4
*
* @param DataValueFormatter $dataValueFormatter
*/
public function addDataValueFormatter( DataValueFormatter $dataValueFormatter ) {
$this->dataValueFormatters[] = $dataValueFormatter;
}
/**
* DataValueFormatters registered with this method are validated after
* DispatchingDataValueFormatter::getDataValueFormatterFor was not able to
* match any Formatter. This to ensure that a distinct FooStringValueFormatter
* is tried before the default StringValueFormatter.
*
* @since 2.4
*
* @param DataValueFormatter $dataValueFormatter
*/
public function addDefaultDataValueFormatter( DataValueFormatter $dataValueFormatter ) {
$this->defaultDataValueFormatters[] = $dataValueFormatter;
}
/**
* @since 2.4
*
* @param DataValue $dataValue
*
* @return DataValueFormatter
* @throws RuntimeException
*/
public function getDataValueFormatterFor( DataValue $dataValue ) {
foreach ( $this->dataValueFormatters as $dataValueFormatter ) {
if ( $dataValueFormatter->isFormatterFor( $dataValue ) ) {
$dataValueFormatter->setDataValue( $dataValue );
return $dataValueFormatter;
}
}
foreach ( $this->defaultDataValueFormatters as $dataValueFormatter ) {
if ( $dataValueFormatter->isFormatterFor( $dataValue ) ) {
$dataValueFormatter->setDataValue( $dataValue );
return $dataValueFormatter;
}
}
throw new RuntimeException( "The dispatcher could not match a DataValueFormatter for " . get_class( $dataValue ) );
}
}
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