/**
* General method to search for triples.
* NULL input for any parameter will match anything.
* Example: $result = $m->find( NULL, NULL, $node );
* Finds all triples with $node as object.
* Returns an empty MemModel if nothing is found.
* To improve the search speed with big Models, call index(INDEX_TYPE)
* before seaching.
*
* It recursively searches in the statements and rules to find
* matching statements.
*
* @param object Node $subject
* @param object Node $predicate
* @param object Node $object
* @return object MemModel
* @access public
* @throws PhpError
*/
function find($subject, $predicate, $object)
{
$searchStringIndex = array();
$resultModel = new MemModel();
//add all infered statements without duplicates to the result model
foreach ($this->_infFind($subject, $predicate, $object, array()) as $statement) {
$resultModel->addWithoutDuplicates($statement);
}
return $resultModel;
}