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1286dcbb PP |
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 | |
c946c9de PP |
24 | from bt2 import interrupter as bt2_interrupter |
25 | from bt2 import component as bt2_component | |
c946c9de | 26 | from bt2 import value as bt2_value |
1286dcbb PP |
27 | import bt2 |
28 | ||
29 | ||
bf403eb2 PP |
30 | class _QueryExecutorCommon: |
31 | @property | |
32 | def _common_ptr(self): | |
33 | return self._as_query_executor_ptr() | |
bbb3650f | 34 | |
bf403eb2 PP |
35 | @property |
36 | def is_interrupted(self): | |
37 | is_interrupted = native_bt.query_executor_is_interrupted(self._common_ptr) | |
38 | return bool(is_interrupted) | |
1286dcbb | 39 | |
bf403eb2 PP |
40 | @property |
41 | def logging_level(self): | |
42 | return native_bt.query_executor_get_logging_level(self._common_ptr) | |
1286dcbb | 43 | |
1286dcbb | 44 | |
bf403eb2 PP |
45 | class QueryExecutor(object._SharedObject, _QueryExecutorCommon): |
46 | _get_ref = staticmethod(native_bt.query_executor_get_ref) | |
47 | _put_ref = staticmethod(native_bt.query_executor_put_ref) | |
d73bb381 | 48 | |
bf403eb2 PP |
49 | def _as_query_executor_ptr(self): |
50 | return self._ptr | |
1286dcbb | 51 | |
f6e305ce | 52 | def __init__(self, component_class, object, params=None, method_obj=None): |
c946c9de | 53 | if not isinstance(component_class, bt2_component._ComponentClass): |
1286dcbb PP |
54 | err = False |
55 | ||
56 | try: | |
c946c9de | 57 | if not issubclass(component_class, bt2_component._UserComponent): |
1286dcbb PP |
58 | err = True |
59 | except TypeError: | |
60 | err = True | |
61 | ||
62 | if err: | |
63 | o = component_class | |
64 | raise TypeError("'{}' is not a component class object".format(o)) | |
65 | ||
66 | utils._check_str(object) | |
67 | ||
68 | if params is None: | |
69 | params_ptr = native_bt.value_null | |
70 | else: | |
71 | params = bt2.create_value(params) | |
72 | params_ptr = params._ptr | |
73 | ||
deec48a6 | 74 | cc_ptr = component_class._bt_component_class_ptr() |
bf403eb2 | 75 | assert cc_ptr is not None |
f6e305ce PP |
76 | |
77 | if method_obj is not None and not native_bt.bt2_is_python_component_class( | |
78 | cc_ptr | |
79 | ): | |
80 | raise ValueError( | |
81 | 'cannot pass a Python object to a non-Python component class' | |
82 | ) | |
83 | ||
84 | ptr = native_bt.bt2_query_executor_create( | |
85 | cc_ptr, object, params_ptr, method_obj | |
86 | ) | |
bf403eb2 PP |
87 | |
88 | if ptr is None: | |
89 | raise bt2._MemoryError('cannot create query executor object') | |
90 | ||
91 | super().__init__(ptr) | |
92 | ||
f6e305ce PP |
93 | # Keep a reference of `method_obj` as the native query executor |
94 | # does not have any. This ensures that, when this object's | |
95 | # query() method is called, the Python object still exists. | |
96 | self._method_obj = method_obj | |
97 | ||
bf403eb2 PP |
98 | def add_interrupter(self, interrupter): |
99 | utils._check_type(interrupter, bt2_interrupter.Interrupter) | |
100 | native_bt.query_executor_add_interrupter(self._ptr, interrupter._ptr) | |
101 | ||
102 | def interrupt(self): | |
103 | native_bt.query_executor_interrupt(self._ptr) | |
104 | ||
105 | def _set_logging_level(self, log_level): | |
106 | utils._check_log_level(log_level) | |
107 | status = native_bt.query_executor_set_logging_level(self._ptr, log_level) | |
108 | utils._handle_func_status(status, "cannot set query executor's logging level") | |
1286dcbb | 109 | |
bf403eb2 PP |
110 | logging_level = property( |
111 | fget=_QueryExecutorCommon.logging_level, fset=_set_logging_level | |
112 | ) | |
113 | ||
114 | @property | |
115 | def is_interrupted(self): | |
116 | is_interrupted = native_bt.query_executor_is_interrupted(self._ptr) | |
117 | return bool(is_interrupted) | |
118 | ||
119 | def query(self): | |
120 | status, result_ptr = native_bt.query_executor_query(self._ptr) | |
fb25b9e3 | 121 | utils._handle_func_status(status, 'cannot query component class') |
bf403eb2 | 122 | assert result_ptr is not None |
c946c9de | 123 | return bt2_value._create_from_ptr(result_ptr) |
bf403eb2 PP |
124 | |
125 | ||
126 | class _PrivateQueryExecutor(_QueryExecutorCommon): | |
127 | def __init__(self, ptr): | |
128 | self._ptr = ptr | |
129 | ||
130 | def _check_validity(self): | |
131 | if self._ptr is None: | |
132 | raise RuntimeError('this object is not valid anymore') | |
133 | ||
134 | def _as_query_executor_ptr(self): | |
135 | self._check_validity() | |
136 | return native_bt.private_query_executor_as_query_executor_const(self._ptr) | |
137 | ||
138 | def _invalidate(self): | |
139 | self._ptr = None |