lib, bt2: add precondition check for port name unicity

[babeltrace.git] / src / bindings / python / bt2 / bt2 / component.py

diff --git a/src/bindings/python/bt2/bt2/component.py b/src/bindings/python/bt2/bt2/component.py
index f4aa8e8003104b5448937d7ddcfcc88b064be260..4e079f7743d934f1b6413efe35c0255028cf0b86 100644 (file)
--- a/src/bindings/python/bt2/bt2/component.py
+++ b/src/bindings/python/bt2/bt2/component.py
@@ -1,24 +1,6 @@
-# The MIT License (MIT)
+# SPDX-License-Identifier: MIT
 #
 # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
 
 from bt2 import native_bt, object, utils
 from bt2 import message_iterator as bt2_message_iterator
@@ -839,6 +821,14 @@ class _UserSourceComponent(_UserComponent, _SourceComponentConst):
 
     def _add_output_port(self, name, user_data=None):
         utils._check_str(name)
+
+        if name in self._output_ports:
+            raise ValueError(
+                'source component `{}` already contains an output port named `{}`'.format(
+                    self.name, name
+                )
+            )
+
         fn = native_bt.self_component_source_add_output_port
         comp_status, self_port_ptr = fn(self._bt_ptr, name, user_data)
         utils._handle_func_status(
@@ -889,6 +879,14 @@ class _UserFilterComponent(_UserComponent, _FilterComponentConst):
 
     def _add_output_port(self, name, user_data=None):
         utils._check_str(name)
+
+        if name in self._output_ports:
+            raise ValueError(
+                'filter component `{}` already contains an output port named `{}`'.format(
+                    self.name, name
+                )
+            )
+
         fn = native_bt.self_component_filter_add_output_port
         comp_status, self_port_ptr = fn(self._bt_ptr, name, user_data)
         utils._handle_func_status(
@@ -901,6 +899,14 @@ class _UserFilterComponent(_UserComponent, _FilterComponentConst):
 
     def _add_input_port(self, name, user_data=None):
         utils._check_str(name)
+
+        if name in self._input_ports:
+            raise ValueError(
+                'filter component `{}` already contains an input port named `{}`'.format(
+                    self.name, name
+                )
+            )
+
         fn = native_bt.self_component_filter_add_input_port
         comp_status, self_port_ptr = fn(self._bt_ptr, name, user_data)
         utils._handle_func_status(
@@ -943,6 +949,14 @@ class _UserSinkComponent(_UserComponent, _SinkComponentConst):
 
     def _add_input_port(self, name, user_data=None):
         utils._check_str(name)
+
+        if name in self._input_ports:
+            raise ValueError(
+                'sink component `{}` already contains an input port named `{}`'.format(
+                    self.name, name
+                )
+            )
+
         fn = native_bt.self_component_sink_add_input_port
         comp_status, self_port_ptr = fn(self._bt_ptr, name, user_data)
         utils._handle_func_status(