/** Create a new literal object
*
* PHP values of type bool, int or float, will automatically be converted
* to the corresponding datatype and PHP sub-class.
*
* If a registered datatype is given, then the registered subclass of EasyRdf_Literal
* will instantiated.
*
* Note that literals are not required to have a language or datatype.
* Literals cannot have both a language and a datatype.
*
* @param mixed $value The value of the literal or an associative array
* @param string $lang The natural language of the literal or null (e.g. 'en')
* @param string $datatype The datatype of the literal or null (e.g. 'xsd:integer')
* @return object EasyRdf_Literal (or subclass of EasyRdf_Literal)
*/
public static function create($value, $lang = null, $datatype = null)
{
if (EasyRdf_Utils::isAssociativeArray($value)) {
if (isset($value['xml:lang'])) {
$lang = $value['xml:lang'];
} else {
if (isset($value['lang'])) {
$lang = $value['lang'];
}
}
if (isset($value['datatype'])) {
$datatype = $value['datatype'];
}
$value = isset($value['value']) ? $value['value'] : null;
}
if ($datatype == null) {
if ($lang == null) {
// Automatic datatype selection
$datatype = self::getDatatypeForValue($value);
}
} else {
// Expand shortened URIs (qnames)
$datatype = EasyRdf_Namespace::expand($datatype);
}
// Work out what class to use for this datatype
if (isset(self::$_datatypeMap[$datatype])) {
$class = self::$_datatypeMap[$datatype];
} else {
$class = 'EasyRdf_Literal';
}
return new $class($value, $lang, $datatype);
}
public function testIsAssocIntPreppend()
{
$arr = array('foo' => 'bar');
array_unshift($arr, 'rat');
$this->assertFalse(EasyRdf_Utils::isAssociativeArray($arr));
}
