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(aval < bval) return result if direction == OVSDB_INDEX_ASC else -result return 0 def index_entry_from_row(self, row): return row._table.rows.IndexEntry( uuid=row.uuid, **{c.column: getattr(row, c.column) for c in self.columns}) def add(self, row): if not all(hasattr(row, col.column) for col in self.columns): # This is a new row, but it hasn't had the necessary columns set # We'll add it later return self.values.add(self.index_entry_from_row(row)) def remove(self, row): self.values.remove(self.index_entry_from_row(row)) def clear(self): self.values = sortedcontainers.SortedListWithKey( key=functools.cmp_to_key(self._cmp)) def irange(self, start, end): return iter(r._table.rows[r.uuid] for r in self.values.irange(start, end)) def __iter__(self): return iter(r._table.rows[r.uuid] for r in self.values) class IndexedRows(DictBase, object): def __init__(self, table, *args, **kwargs): super(IndexedRows, self).__init__(*args, **kwargs) self.table = table self.indexes = {} self.IndexEntry = IndexEntryClass(table) def index_create(self, name): if name in self.indexes: raise ValueError("An index named {} already exists".format(name)) index = self.indexes[name] = MultiColumnIndex(name) return index def __setitem__(self, key, item): self.data[key] = item for index in self.indexes.values(): index.add(item) def __delitem__(self, key): val = self.data[key] del self.data[key] for index in self.indexes.values(): index.remove(val) def clear(self): self.data.clear() for index in self.indexes.values(): index.clear() # Nothing uses the methods below, though they'd be easy to implement def update(self, dict=None, **kwargs): raise NotImplementedError() def setdefault(self, key, failobj=None): raise NotImplementedError() def pop(self, key, *args): raise NotImplementedError() def popitem(self): raise NotImplementedError() @classmethod def fromkeys(cls, iterable, value=None): raise NotImplementedError() def IndexEntryClass(table): """Create a class used represent Rows in indexes ovs.db.idl.Row, being inherently tied to transaction processing and being initialized with dicts of Datums, is not really useable as an object to pass to and store in indexes. This method will create a class named after the table's name that is initialized with that Table Row's default values. For example: Port = IndexEntryClass(idl.tables['Port']) will create a Port class. This class can then be used to search custom indexes. For example: for port in idx.iranage(Port(name="test1"), Port(name="test9")): ... """ def defaults_uuid_to_row(atom, base): return atom.value columns = ['uuid'] + list(table.columns.keys()) cls = collections.namedtuple(table.name, columns) cls._table = table cls.__new__.__defaults__ = (None,) + tuple( data.Datum.default(c.type).to_python(defaults_uuid_to_row) for c in table.columns.values()) return cls