| 1 | # The MIT License (MIT) |
| 2 | # |
| 3 | # Copyright (c) 2018 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 4 | # |
| 5 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | # of this software and associated documentation files (the "Software"), to deal |
| 7 | # in the Software without restriction, including without limitation the rights |
| 8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | # copies of the Software, and to permit persons to whom the Software is |
| 10 | # furnished to do so, subject to the following conditions: |
| 11 | # |
| 12 | # The above copyright notice and this permission notice shall be included in |
| 13 | # all copies or substantial portions of the Software. |
| 14 | # |
| 15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 21 | # THE SOFTWARE. |
| 22 | |
| 23 | import collections |
| 24 | from bt2 import native_bt, object |
| 25 | |
| 26 | |
| 27 | class Scope: |
| 28 | PACKET_CONTEXT = native_bt.SCOPE_PACKET_CONTEXT |
| 29 | EVENT_COMMON_CONTEXT = native_bt.SCOPE_EVENT_COMMON_CONTEXT |
| 30 | EVENT_SPECIFIC_CONTEXT = native_bt.SCOPE_EVENT_SPECIFIC_CONTEXT |
| 31 | EVENT_PAYLOAD = native_bt.SCOPE_EVENT_PAYLOAD |
| 32 | |
| 33 | |
| 34 | class _FieldPathItem: |
| 35 | pass |
| 36 | |
| 37 | |
| 38 | class _IndexFieldPathItem(_FieldPathItem): |
| 39 | def __init__(self, index): |
| 40 | self._index = index |
| 41 | |
| 42 | @property |
| 43 | def index(self): |
| 44 | return self._index |
| 45 | |
| 46 | |
| 47 | class _CurrentArrayElementFieldPathItem(_FieldPathItem): |
| 48 | pass |
| 49 | |
| 50 | |
| 51 | class _FieldPath(object._SharedObject, collections.abc.Iterable): |
| 52 | _get_ref = staticmethod(native_bt.field_path_get_ref) |
| 53 | _put_ref = staticmethod(native_bt.field_path_put_ref) |
| 54 | |
| 55 | @property |
| 56 | def root_scope(self): |
| 57 | scope = native_bt.field_path_get_root_scope(self._ptr) |
| 58 | return _SCOPE_TO_OBJ[scope] |
| 59 | |
| 60 | def __len__(self): |
| 61 | return native_bt.field_path_get_item_count(self._ptr) |
| 62 | |
| 63 | def __iter__(self): |
| 64 | for idx in range(len(self)): |
| 65 | item_ptr = native_bt.field_path_borrow_item_by_index_const(self._ptr, idx) |
| 66 | assert item_ptr is not None |
| 67 | item_type = native_bt.field_path_item_get_type(item_ptr) |
| 68 | if item_type == native_bt.FIELD_PATH_ITEM_TYPE_INDEX: |
| 69 | idx = native_bt.field_path_item_index_get_index(item_ptr) |
| 70 | yield _IndexFieldPathItem(idx) |
| 71 | elif item_type == native_bt.FIELD_PATH_ITEM_TYPE_CURRENT_ARRAY_ELEMENT: |
| 72 | yield _CurrentArrayElementFieldPathItem() |
| 73 | else: |
| 74 | assert False |
| 75 | |
| 76 | |
| 77 | _SCOPE_TO_OBJ = { |
| 78 | native_bt.SCOPE_PACKET_CONTEXT: Scope.PACKET_CONTEXT, |
| 79 | native_bt.SCOPE_EVENT_COMMON_CONTEXT: Scope.EVENT_COMMON_CONTEXT, |
| 80 | native_bt.SCOPE_EVENT_SPECIFIC_CONTEXT: Scope.EVENT_SPECIFIC_CONTEXT, |
| 81 | native_bt.SCOPE_EVENT_PAYLOAD: Scope.EVENT_PAYLOAD |
| 82 | } |