X-Git-Url: http://git.ithinksw.org/~jspiros/python-ebml.git/blobdiff_plain/3e0006c63000d5c09a9a09657806a6046cf6009d..f1ea34ada2ec6e900703bae7863837ad2b8287f1:/ebml/schema/specs.py?ds=inline diff --git a/ebml/schema/specs.py b/ebml/schema/specs.py index 7320b6b..8c27e9f 100644 --- a/ebml/schema/specs.py +++ b/ebml/schema/specs.py @@ -1,5 +1,5 @@ from xml.etree.ElementTree import parse as parse_xml -from .base import INT, UINT, FLOAT, STRING, UNICODE, DATE, BINARY, CONTAINER, Element, Schema +from .base import INT, UINT, FLOAT, STRING, UNICODE, DATE, BINARY, CONTAINER, Element, Document SPECDATA_TYPES = { @@ -14,13 +14,13 @@ SPECDATA_TYPES = { } -def parse_specdata(source, schema_name): +def parse_specdata(source, doc_name, doc_type, doc_version): """ Reads a schema specification from a file (e.g., specdata.xml) or file-like object, and returns a tuple containing: * a mapping of class names to Element subclasses - * a Schema subclass + * a Document subclass :arg source: the file or file-like object :type source: str or file-like object @@ -32,43 +32,62 @@ def parse_specdata(source, schema_name): tree = parse_xml(source) elements = {} - parent_elements = [] + globals = [] - for element_element in tree.getiterator('element'): - raw_attrs = element_element.attrib - - element_name = '%sElement' % raw_attrs.get('cppname', raw_attrs.get('name')) - element_level = int(raw_attrs['level']) - element_attrs = { - '__module__': None, - 'class_id': int(raw_attrs['id'], 0), - 'class_name': raw_attrs['name'], - 'data_type': SPECDATA_TYPES[raw_attrs['type']] - } - - while parent_elements and element_level <= parent_elements[-1][0]: - parent_elements.pop() - - if element_level == -1: - element_attrs['class_global'] = True - parent_elements = [] - elif element_level == 0: - element_attrs['class_root'] = True - parent_elements = [] - else: - if raw_attrs.get('recursive', '0') == '1': - element_attrs['class_parents'] = (parent_elements[-1][1], 'self') + def child_elements(parent_level, element_list): + children = [] + while element_list: + raw_element = element_list[0] + raw_attrs = raw_element.attrib + + element_level = int(raw_attrs['level']) + + is_global = False + if element_level == -1: + is_global = True + elif parent_level is not None and not element_level > parent_level: + break + element_list = element_list[1:] + + element_name = '%sElement' % raw_attrs.get('cppname', raw_attrs.get('name')).translate(None, '-') + element_attrs = { + '__module__': None, + 'id': int(raw_attrs['id'], 0), + 'name': raw_attrs['name'], + 'type': SPECDATA_TYPES[raw_attrs['type']], + 'mandatory': True if raw_attrs.get('mandatory', False) == '1' else False, + 'multiple': True if raw_attrs.get('multiple', False) == '1' else False + } + try: + element_attrs['default'] = { + INT: lambda default: int(default), + UINT: lambda default: int(default), + FLOAT: lambda default: float(default), + STRING: lambda default: str(default), + UNICODE: lambda default: unicode(default) + }.get(element_attrs['type'], lambda default: default)(raw_attrs['default']) + except (KeyError, ValueError): + element_attrs['default'] = None + + element_attrs['children'], element_list = child_elements(element_level if not is_global else 0, element_list) + + element = type(element_name, (Element,), element_attrs) + elements[element_name] = element + if is_global: + globals.append(element) else: - element_attrs['class_parents'] = (parent_elements[-1][1],) - - element = type(element_name, (Element,), element_attrs) - elements[element_name] = element - parent_elements.append((element_level, element)) + children.append(element) + return tuple(children), element_list + + children = child_elements(None, tree.getroot().getchildren())[0] - schema_attrs = { + document_attrs = { '__module__': None, - 'elements': tuple(elements.values()) + 'type': doc_type, + 'version': doc_version, + 'children': children, + 'globals': tuple(globals) } - schema = type(schema_name, (Schema,), schema_attrs) + document = type(doc_name, (Document,), document_attrs) - return elements, schema \ No newline at end of file + return elements, document \ No newline at end of file