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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 PP |
33 | def __init__(self): |
34 | ptr = native_bt.query_executor_create() | |
35 | ||
36 | if ptr is None: | |
37 | raise bt2.CreationError('cannot create query executor object') | |
38 | ||
39 | super().__init__(ptr) | |
40 | ||
41 | def cancel(self): | |
42 | status = native_bt.query_executor_cancel(self._ptr) | |
fb25b9e3 PP |
43 | utils._handle_func_status(status, |
44 | 'cannot cancel query executor object') | |
1286dcbb PP |
45 | |
46 | @property | |
47 | def is_canceled(self): | |
48 | is_canceled = native_bt.query_executor_is_canceled(self._ptr) | |
49 | assert(is_canceled >= 0) | |
50 | return is_canceled > 0 | |
51 | ||
83da519a PP |
52 | def query(self, component_class, object, params=None, |
53 | logging_level=bt2.logging.LoggingLevel.NONE): | |
7d0e6fe8 | 54 | if self.is_canceled: |
fb25b9e3 | 55 | raise bt2.Canceled |
7d0e6fe8 | 56 | |
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57 | if not isinstance(component_class, bt2.component._GenericComponentClass): |
58 | err = False | |
59 | ||
60 | try: | |
61 | if not issubclass(component_class, bt2.component._UserComponent): | |
62 | err = True | |
63 | except TypeError: | |
64 | err = True | |
65 | ||
66 | if err: | |
67 | o = component_class | |
68 | raise TypeError("'{}' is not a component class object".format(o)) | |
69 | ||
70 | utils._check_str(object) | |
71 | ||
72 | if params is None: | |
73 | params_ptr = native_bt.value_null | |
74 | else: | |
75 | params = bt2.create_value(params) | |
76 | params_ptr = params._ptr | |
77 | ||
83da519a | 78 | utils._check_log_level(logging_level) |
deec48a6 | 79 | cc_ptr = component_class._bt_component_class_ptr() |
1286dcbb PP |
80 | |
81 | status, result_ptr = native_bt.query_executor_query(self._ptr, cc_ptr, | |
83da519a PP |
82 | object, params_ptr, |
83 | logging_level) | |
fb25b9e3 | 84 | utils._handle_func_status(status, 'cannot query component class') |
1286dcbb | 85 | assert(result_ptr) |
ae0bfae8 | 86 | return bt2.value._create_from_ptr(result_ptr) |