Shanty_Mongo_Document::getProperty PHP Method

    public function getProperty($property)
    {
        // If property exists and initialised then return it
        if (array_key_exists($property, $this->_data)) {
            return $this->_data[$property];
        }
        // Fetch clean data for this property
        if (array_key_exists($property, $this->_cleanData)) {
            $data = $this->_cleanData[$property];
        } else {
            $data = array();
        }
        // If data is not an array then we can do nothing else with it
        if (!is_array($data)) {
            $this->_data[$property] = $data;
            return $this->_data[$property];
        }
        // If property is supposed to be an array then initialise an array
        if ($this->hasRequirement($property, 'Array')) {
            return $this->_data[$property] = $data;
        }
        // If property is a reference to another document then fetch the reference document
        $db = $this->getConfigAttribute('db');
        if (MongoDBRef::isRef($data)) {
            $collection = $data['$ref'];
            $data = MongoDBRef::get($this->_getMongoDB(false), $data);
            // If this is a broken reference then no point keeping it for later
            if (!$data) {
                $this->_data[$property] = null;
                return $this->_data[$property];
            }
            $reference = true;
        } else {
            $collection = $this->getConfigAttribute('collection');
            $reference = false;
        }
        // Find out the class name of the document or document set we are loaded
        if ($className = $this->hasRequirement($property, 'DocumentSet')) {
            $docType = 'Shanty_Mongo_DocumentSet';
        } else {
            $className = $this->hasRequirement($property, 'Document');
            // Load a document anyway so long as $data is not empty
            if (!$className && !empty($data)) {
                $className = 'Shanty_Mongo_Document';
            }
            if ($className) {
                $docType = 'Shanty_Mongo_Document';
            }
        }
        // Nothing else to do
        if (!$className) {
            return null;
        }
        // Configure property for document/documentSet usage
        $config = array();
        $config['new'] = empty($data);
        $config['connectionGroup'] = $this->getConfigAttribute('connectionGroup');
        $config['db'] = $this->getConfigAttribute('db');
        $config['collection'] = $collection;
        $config['requirementModifiers'] = $this->getRequirements($property . '.');
        $config['hasId'] = $this->hasRequirement($property, 'hasId');
        if (!$reference) {
            $config['pathToDocument'] = $this->getPathToProperty($property);
            $config['criteria'] = $this->getCriteria();
        }
        // Initialise document
        $document = new $className($data, $config);
        // if this document was a reference then remember that
        if ($reference) {
            $this->_references->attach($document);
        }
        $this->_data[$property] = $document;
        return $this->_data[$property];
    }