Parses <OnEntry>

        @param node: Node containing the <OnEntry> element
        @type node: xml.etree.Element

def parse_on_entry(self, node):
        """
        Parses <OnEntry>

        @param node: Node containing the <OnEntry> element
        @type node: xml.etree.Element
        """

        event_handler = OnEntry()

        self.current_event_handler = event_handler
        self.current_regime.add_event_handler(event_handler)

        self.process_nested_tags(node)

        self.current_event_handler = None