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
28 class QueryExecutor(object._Object
):
29 def _handle_status(self
, status
, gen_error_msg
):
30 if status
== native_bt
.QUERY_STATUS_AGAIN
:
32 elif status
== native_bt
.QUERY_STATUS_EXECUTOR_CANCELED
:
33 raise bt2
.QueryExecutorCanceled
34 elif status
== native_bt
.QUERY_STATUS_INVALID_OBJECT
:
35 raise bt2
.InvalidQueryObject
36 elif status
== native_bt
.QUERY_STATUS_INVALID_PARAMS
:
37 raise bt2
.InvalidQueryParams
39 raise bt2
.Error(gen_error_msg
)
42 ptr
= native_bt
.query_executor_create()
45 raise bt2
.CreationError('cannot create query executor object')
50 status
= native_bt
.query_executor_cancel(self
._ptr
)
51 self
._handle
_status
(status
, 'cannot cancel query executor object')
54 def is_canceled(self
):
55 is_canceled
= native_bt
.query_executor_is_canceled(self
._ptr
)
56 assert(is_canceled
>= 0)
57 return is_canceled
> 0
59 def query(self
, component_class
, object, params
=None):
60 if not isinstance(component_class
, bt2
.component
._GenericComponentClass
):
64 if not issubclass(component_class
, bt2
.component
._UserComponent
):
71 raise TypeError("'{}' is not a component class object".format(o
))
73 utils
._check
_str
(object)
76 params_ptr
= native_bt
.value_null
78 params
= bt2
.create_value(params
)
79 params_ptr
= params
._ptr
81 if isinstance(component_class
, bt2
.component
._GenericComponentClass
):
82 cc_ptr
= component_class
._ptr
84 cc_ptr
= component_class
._cc
_ptr
86 status
, result_ptr
= native_bt
.query_executor_query(self
._ptr
, cc_ptr
,
88 self
._handle
_status
(status
, 'cannot query component class')
90 return bt2
.values
._create
_from
_ptr
(result_ptr
)
92 def __eq__(self
, other
):
93 if type(other
) is not type(self
):
96 return self
.addr
== other
.addr