1 # The MIT License (MIT)
3 # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
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:
12 # The above copyright notice and this permission notice shall be included in
13 # all copies or substantial portions of the Software.
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
23 from bt2
import native_bt
, object, utils
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
)
33 def _handle_status(self
, status
, gen_error_msg
):
34 if status
== native_bt
.QUERY_EXECUTOR_STATUS_AGAIN
:
36 elif status
== native_bt
.QUERY_EXECUTOR_STATUS_CANCELED
:
37 raise bt2
.QueryExecutorCanceled
38 elif status
== native_bt
.QUERY_EXECUTOR_STATUS_INVALID_OBJECT
:
39 raise bt2
.InvalidQueryObject
40 elif status
== native_bt
.QUERY_EXECUTOR_STATUS_INVALID_PARAMS
:
41 raise bt2
.InvalidQueryParams
43 raise bt2
.Error(gen_error_msg
)
46 ptr
= native_bt
.query_executor_create()
49 raise bt2
.CreationError('cannot create query executor object')
54 status
= native_bt
.query_executor_cancel(self
._ptr
)
55 self
._handle
_status
(status
, 'cannot cancel query executor object')
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
63 def query(self
, component_class
, object, params
=None,
64 logging_level
=bt2
.logging
.LoggingLevel
.NONE
):
66 raise bt2
.QueryExecutorCanceled
68 if not isinstance(component_class
, bt2
.component
._GenericComponentClass
):
72 if not issubclass(component_class
, bt2
.component
._UserComponent
):
79 raise TypeError("'{}' is not a component class object".format(o
))
81 utils
._check
_str
(object)
84 params_ptr
= native_bt
.value_null
86 params
= bt2
.create_value(params
)
87 params_ptr
= params
._ptr
89 utils
._check
_log
_level
(logging_level
)
90 cc_ptr
= component_class
._component
_class
_ptr
()
92 status
, result_ptr
= native_bt
.query_executor_query(self
._ptr
, cc_ptr
,
95 self
._handle
_status
(status
, 'cannot query component class')
97 return bt2
.value
._create
_from
_ptr
(result_ptr
)