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1 | # The MIT License (MIT) |
2 | # | |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@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 | from bt2 import native_bt, object, utils | |
24 | import bt2.component | |
83da519a | 25 | import bt2.logging |
1286dcbb PP |
26 | import bt2 |
27 | ||
28 | ||
c3044a97 | 29 | class QueryExecutor(object._SharedObject): |
a49e2cc3 PP |
30 | _get_ref = staticmethod(native_bt.query_executor_get_ref) |
31 | _put_ref = staticmethod(native_bt.query_executor_put_ref) | |
bbb3650f | 32 | |
1286dcbb | 33 | def _handle_status(self, status, gen_error_msg): |
bbb3650f | 34 | if status == native_bt.QUERY_EXECUTOR_STATUS_AGAIN: |
1286dcbb | 35 | raise bt2.TryAgain |
bbb3650f | 36 | elif status == native_bt.QUERY_EXECUTOR_STATUS_CANCELED: |
1286dcbb | 37 | raise bt2.QueryExecutorCanceled |
bbb3650f | 38 | elif status == native_bt.QUERY_EXECUTOR_STATUS_INVALID_OBJECT: |
1286dcbb | 39 | raise bt2.InvalidQueryObject |
bbb3650f | 40 | elif status == native_bt.QUERY_EXECUTOR_STATUS_INVALID_PARAMS: |
1286dcbb PP |
41 | raise bt2.InvalidQueryParams |
42 | elif status < 0: | |
43 | raise bt2.Error(gen_error_msg) | |
44 | ||
45 | def __init__(self): | |
46 | ptr = native_bt.query_executor_create() | |
47 | ||
48 | if ptr is None: | |
49 | raise bt2.CreationError('cannot create query executor object') | |
50 | ||
51 | super().__init__(ptr) | |
52 | ||
53 | def cancel(self): | |
54 | status = native_bt.query_executor_cancel(self._ptr) | |
55 | self._handle_status(status, 'cannot cancel query executor object') | |
56 | ||
57 | @property | |
58 | def is_canceled(self): | |
59 | is_canceled = native_bt.query_executor_is_canceled(self._ptr) | |
60 | assert(is_canceled >= 0) | |
61 | return is_canceled > 0 | |
62 | ||
83da519a PP |
63 | def query(self, component_class, object, params=None, |
64 | logging_level=bt2.logging.LoggingLevel.NONE): | |
7d0e6fe8 SM |
65 | if self.is_canceled: |
66 | raise bt2.QueryExecutorCanceled | |
67 | ||
1286dcbb PP |
68 | if not isinstance(component_class, bt2.component._GenericComponentClass): |
69 | err = False | |
70 | ||
71 | try: | |
72 | if not issubclass(component_class, bt2.component._UserComponent): | |
73 | err = True | |
74 | except TypeError: | |
75 | err = True | |
76 | ||
77 | if err: | |
78 | o = component_class | |
79 | raise TypeError("'{}' is not a component class object".format(o)) | |
80 | ||
81 | utils._check_str(object) | |
82 | ||
83 | if params is None: | |
84 | params_ptr = native_bt.value_null | |
85 | else: | |
86 | params = bt2.create_value(params) | |
87 | params_ptr = params._ptr | |
88 | ||
83da519a | 89 | utils._check_log_level(logging_level) |
bbb3650f | 90 | cc_ptr = component_class._component_class_ptr() |
1286dcbb PP |
91 | |
92 | status, result_ptr = native_bt.query_executor_query(self._ptr, cc_ptr, | |
83da519a PP |
93 | object, params_ptr, |
94 | logging_level) | |
1286dcbb PP |
95 | self._handle_status(status, 'cannot query component class') |
96 | assert(result_ptr) | |
ae0bfae8 | 97 | return bt2.value._create_from_ptr(result_ptr) |