/** Check that a value parameter is valid, and convert it to an associative array if needed
* @ignore
*/
protected function checkValueParam(&$value)
{
if (isset($value)) {
if (is_object($value)) {
if (!method_exists($value, 'toRdfPhp')) {
// Convert to a literal object
$value = Literal::create($value);
}
$value = $value->toRdfPhp();
} elseif (is_array($value)) {
if (!isset($value['type'])) {
throw new \InvalidArgumentException("\$value is missing a 'type' key");
}
if (!isset($value['value'])) {
throw new \InvalidArgumentException("\$value is missing a 'value' key");
}
// Fix ordering and remove unknown keys
$value = array('type' => strval($value['type']), 'value' => strval($value['value']), 'lang' => isset($value['lang']) ? strval($value['lang']) : null, 'datatype' => isset($value['datatype']) ? strval($value['datatype']) : null);
} else {
$value = array('type' => 'literal', 'value' => strval($value), 'datatype' => Literal::getDatatypeForValue($value));
}
if (!in_array($value['type'], array('uri', 'bnode', 'literal'), true)) {
throw new \InvalidArgumentException("\$value does not have a valid type (" . $value['type'] . ")");
}
if (empty($value['datatype'])) {
unset($value['datatype']);
}
if (empty($value['lang'])) {
unset($value['lang']);
}
if (isset($value['lang']) and isset($value['datatype'])) {
throw new \InvalidArgumentException("\$value cannot have both and language and a datatype");
}
}
}