lib: make packets and packet messages optional, disabled by default

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

# The MIT License (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
import bt2.field_class
import bt2.event_class
import collections.abc
import bt2.stream
import bt2


class _StreamClass(object._SharedObject, collections.abc.Mapping):
    _get_ref = staticmethod(native_bt.stream_class_get_ref)
    _put_ref = staticmethod(native_bt.stream_class_put_ref)

    def __getitem__(self, key):
        utils._check_int64(key)
        ec_ptr = native_bt.stream_class_borrow_event_class_by_id(self._ptr, key)

        if ec_ptr is None:
            raise KeyError(key)

        return bt2.event_class._EventClass._create_from_ptr_and_get_ref(ec_ptr)

    def __len__(self):
        count = native_bt.stream_class_get_event_class_count(self._ptr)
        assert count >= 0
        return count

    def __iter__(self):
        for idx in range(len(self)):
            ec_ptr = native_bt.stream_class_borrow_event_class_by_index_const(self._ptr, idx)
            assert ec_ptr is not None

            id = native_bt.event_class_get_id(ec_ptr)
            assert id >= 0

            yield id

    def create_event_class(self, id=None, name=None, log_level=None, emf_uri=None,
                           specific_context_field_class=None,
                           payload_field_class=None):
        if self.assigns_automatic_event_class_id:
            if id is not None:
                raise ValueError('id provided, but stream class assigns automatic event class ids')

            ec_ptr = native_bt.event_class_create(self._ptr)
        else:
            if id is None:
                raise ValueError('id not provided, but stream class does not assign automatic event class ids')

            utils._check_uint64(id)
            ec_ptr = native_bt.event_class_create_with_id(self._ptr, id)

        event_class = bt2.event_class._EventClass._create_from_ptr(ec_ptr)

        if name is not None:
            event_class._name = name

        if log_level is not None:
            event_class._log_level = log_level

        if emf_uri is not None:
            event_class._emf_uri = emf_uri

        if specific_context_field_class is not None:
            event_class._specific_context_field_class = specific_context_field_class

        if payload_field_class is not None:
            event_class._payload_field_class = payload_field_class

        return event_class

    @property
    def trace_class(self):
        tc_ptr = native_bt.stream_class_borrow_trace_class_const(self._ptr)

        if tc_ptr is not None:
            return bt2._TraceClass._create_from_ptr_and_get_ref(tc_ptr)

    @property
    def name(self):
        return native_bt.stream_class_get_name(self._ptr)

    def _name(self, name):
        utils._check_str(name)
        status = native_bt.stream_class_set_name(self._ptr, name)
        utils._handle_func_status(status,
                                  "cannot set stream class object's name")

    _name = property(fset=_name)

    @property
    def assigns_automatic_event_class_id(self):
        return native_bt.stream_class_assigns_automatic_event_class_id(self._ptr)

    def _assigns_automatic_event_class_id(self, auto_id):
        utils._check_bool(auto_id)
        return native_bt.stream_class_set_assigns_automatic_event_class_id(self._ptr, auto_id)

    _assigns_automatic_event_class_id = property(fset=_assigns_automatic_event_class_id)

    @property
    def assigns_automatic_stream_id(self):
        return native_bt.stream_class_assigns_automatic_stream_id(self._ptr)

    def _assigns_automatic_stream_id(self, auto_id):
        utils._check_bool(auto_id)
        return native_bt.stream_class_set_assigns_automatic_stream_id(self._ptr, auto_id)

    _assigns_automatic_stream_id = property(fset=_assigns_automatic_stream_id)

    @property
    def supports_packets(self):
        return native_bt.stream_class_supports_packets(self._ptr)

    @property
    def packets_have_beginning_default_clock_snapshot(self):
        return native_bt.stream_class_packets_have_beginning_default_clock_snapshot(self._ptr)

    @property
    def packets_have_end_default_clock_snapshot(self):
        return native_bt.stream_class_packets_have_end_default_clock_snapshot(self._ptr)

    def _set_supports_packets(self, supports, with_begin_cs=False, with_end_cs=False):
        utils._check_bool(supports)
        utils._check_bool(with_begin_cs)
        utils._check_bool(with_end_cs)

        if not supports and (with_begin_cs or with_end_cs):
            raise ValueError('cannot not support packets, but have default clock snapshots')

        if not supports and self.packet_context_field_class is not None:
            raise ValueError('stream class already has a packet context field class')

        native_bt.stream_class_set_supports_packets(self._ptr, supports, with_begin_cs, with_end_cs)

    @property
    def supports_discarded_events(self):
        return native_bt.stream_class_supports_discarded_events(self._ptr)

    def _set_supports_discarded_events(self, supports, with_cs=False):
        utils._check_bool(supports)
        utils._check_bool(with_cs)

        if not supports and with_cs:
            raise ValueError('cannot not support discarded events, but have default clock snapshots')

        native_bt.stream_class_set_supports_discarded_events(self._ptr, supports, with_cs)

    @property
    def discarded_events_have_default_clock_snapshots(self):
        return native_bt.stream_class_discarded_events_have_default_clock_snapshots(self._ptr)

    @property
    def supports_discarded_packets(self):
        return native_bt.stream_class_supports_discarded_packets(self._ptr)

    def _set_supports_discarded_packets(self, supports, with_cs):
        utils._check_bool(supports)
        utils._check_bool(with_cs)

        if supports and not self.supports_packets:
            raise ValueError('cannot support discarded packets, but not support packets')

        if not supports and with_cs:
            raise ValueError('cannot not support discarded packets, but have default clock snapshots')

        native_bt.stream_class_set_supports_discarded_packets(self._ptr, supports, with_cs)

    @property
    def discarded_packets_have_default_clock_snapshots(self):
        return native_bt.stream_class_discarded_packets_have_default_clock_snapshots(self._ptr)

    @property
    def id(self):
        id = native_bt.stream_class_get_id(self._ptr)

        if id < 0:
            return

        return id

    @id.setter
    def id(self, id):
        utils._check_int64(id)
        status = native_bt.stream_class_set_id(self._ptr, id)
        utils._handle_func_status(status, "cannot set stream class object's ID")

    @property
    def packet_context_field_class(self):
        fc_ptr = native_bt.stream_class_borrow_packet_context_field_class_const(self._ptr)

        if fc_ptr is None:
            return

        return bt2.field_class._create_field_class_from_ptr_and_get_ref(fc_ptr)

    def _packet_context_field_class(self, packet_context_field_class):
        if packet_context_field_class is not None:
            utils._check_type(packet_context_field_class,
                              bt2.field_class._StructureFieldClass)

            if not self.supports_packets:
                raise ValueError('stream class does not support packets')

            status = native_bt.stream_class_set_packet_context_field_class(self._ptr,
                                                                           packet_context_field_class._ptr)
            utils._handle_func_status(status,
                                      "cannot set stream class' packet context field class")

    _packet_context_field_class = property(fset=_packet_context_field_class)

    @property
    def event_common_context_field_class(self):
        fc_ptr = native_bt.stream_class_borrow_event_common_context_field_class_const(self._ptr)

        if fc_ptr is None:
            return

        return bt2.field_class._create_field_class_from_ptr_and_get_ref(fc_ptr)

    def _event_common_context_field_class(self, event_common_context_field_class):
        if event_common_context_field_class is not None:
            utils._check_type(event_common_context_field_class,
                              bt2.field_class._StructureFieldClass)

            set_context_fn = native_bt.stream_class_set_event_common_context_field_class
            status = set_context_fn(self._ptr, event_common_context_field_class._ptr)
            utils._handle_func_status(status,
                                      "cannot set stream class' event context field type")

    _event_common_context_field_class = property(fset=_event_common_context_field_class)

    @property
    def default_clock_class(self):
        cc_ptr = native_bt.stream_class_borrow_default_clock_class(self._ptr)
        if cc_ptr is None:
            return

        return bt2.clock_class._ClockClass._create_from_ptr_and_get_ref(cc_ptr)

    def _default_clock_class(self, clock_class):
        utils._check_type(clock_class, bt2.clock_class._ClockClass)
        native_bt.stream_class_set_default_clock_class(
            self._ptr, clock_class._ptr)

    _default_clock_class = property(fset=_default_clock_class)