public function testIsXmlPrefix()
{
$prefixes = array('a', 'ns1', 'dssn', 'OWL', 'ns.3', 'Ab', 'a-b', 'X·Y', '_', '_5c', 'ÄÖÜäöüß');
$nonPrefixes = array('1a', 'abc:', '-hallo', '.ns', 'raute#', '#a', 'a/b', '/a', 'a×', ' ', 'o ha');
foreach ($prefixes as $p) {
$this->assertTrue(Erfurt_Utils::isXmlPrefix($p));
}
foreach ($nonPrefixes as $p) {
$this->assertFalse(Erfurt_Utils::isXmlPrefix($p));
}
}
/**
* Adds a prefix for the namespace URI in a given graph.
*
* @param Erfurt_Rdf_Model|string $graph
* @param string $namespace
* @param string $prefix
* @throws Erfurt_Namespaces_Exception
*/
public function addNamespacePrefix($graph, $namespace, $prefix)
{
// safety
$prefix = (string) $prefix;
$namespace = (string) $namespace;
//lowercase prefix always (for best compatibility)
$prefix = strtolower($prefix);
$graphPrefixes = $this->getNamespacesForGraph($graph);
// check if namespace is a valid URI
require_once 'Erfurt/Uri.php';
if (!Erfurt_Uri::check($namespace)) {
require_once 'Erfurt/Namespaces/Exception.php';
throw new Erfurt_Namespaces_Exception("Given namespace '{$namespace}' is not a valid URI.");
}
// check if prefix is a valid XML name
require_once 'Erfurt/Utils.php';
if (!Erfurt_Utils::isXmlPrefix($prefix)) {
require_once 'Erfurt/Namespaces/Exception.php';
throw new Erfurt_Namespaces_Exception("Given prefix '{$prefix}' is not a valid XML name.");
}
// check if prefix matches a URI scheme (http://www.iana.org/assignments/uri-schemes.html)
if (array_key_exists($prefix, $this->_reservedNames)) {
require_once 'Erfurt/Namespaces/Exception.php';
throw new Erfurt_Namespaces_Exception("Reserved name '{$prefix}' cannot be used as a namespace prefix.");
}
// check for existence of prefixes
if (array_key_exists($prefix, $graphPrefixes)) {
require_once 'Erfurt/Namespaces/Exception.php';
throw new Erfurt_Namespaces_Exception("Prefix '{$prefix}' already exists.");
}
// check for multiple prefixes
if (!$this->_allowMultiplePrefixes and array_key_exists($namespace, array_flip($graphPrefixes))) {
require_once 'Erfurt/Namespaces/Exception.php';
throw new Erfurt_Namespaces_Exception("Multiple prefixes for namespace '{$namespace}' not allowed.");
}
// add new prefix
$graphPrefixes[$prefix] = $namespace;
// save new set of prefixes
$this->setNamespacesForGraph($graph, $graphPrefixes);
}
