| 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 |
| 25 | import bt2.logging |
| 26 | import bt2 |
| 27 | |
| 28 | |
| 29 | class QueryExecutor(object._SharedObject): |
| 30 | _get_ref = staticmethod(native_bt.query_executor_get_ref) |
| 31 | _put_ref = staticmethod(native_bt.query_executor_put_ref) |
| 32 | |
| 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) |
| 43 | utils._handle_func_status(status, |
| 44 | 'cannot cancel query executor object') |
| 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 | |
| 52 | def query(self, component_class, object, params=None, |
| 53 | logging_level=bt2.logging.LoggingLevel.NONE): |
| 54 | if self.is_canceled: |
| 55 | raise bt2.Canceled |
| 56 | |
| 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 | |
| 78 | utils._check_log_level(logging_level) |
| 79 | cc_ptr = component_class._bt_component_class_ptr() |
| 80 | |
| 81 | status, result_ptr = native_bt.query_executor_query(self._ptr, cc_ptr, |
| 82 | object, params_ptr, |
| 83 | logging_level) |
| 84 | utils._handle_func_status(status, 'cannot query component class') |
| 85 | assert(result_ptr) |
| 86 | return bt2.value._create_from_ptr(result_ptr) |