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c8820b76 SM |
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 | } |