Python IonObjectDeserializer.deserialize方法代码示例

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_complex_version(self):

        io_serializer = IonObjectSerializer()
        obj = IonObject('SampleComplexEvent', {'num': 9, 'other_field': 'test value'})
        obj_dict = io_serializer.serialize(obj,True)
        self.assertEquals(obj_dict['persisted_version'], 1)
        # simulate a previous version data of SampleComplexEvent_V2
        obj_dict['type_'] = 'SampleComplexEvent_V2'

        # verify that the simulated previous version data has resource
        self.assertEquals('resource' in obj_dict, True)
        # verify that the simulated previous version data does not have new_attribute
        self.assertEquals('new_resource' in obj_dict, False)
        # simulate reading the previous version that does not have new_attribute
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)
        # verify that new attribute is added and initialized with default value
        self.assertEquals(obj.new_resource.new_attribute['key'], 'value')
        # verify that old attributes are still there
        self.assertEquals(obj.num, 9)
        # verify that old attributes are still there
        self.assertEquals(obj.other_field, 'test value')
        # verify that on read version is not yet updated
        self.assertEquals(obj_dict['persisted_version'], 1)

        # simulate create/update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is updated
        self.assertEquals(obj_dict['persisted_version'], 2)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def _construct_stream_and_publisher(self, stream_name, stream_config):

        if log.isEnabledFor(logging.TRACE):  # pragma: no cover
            log.trace("%r: _construct_stream_and_publisher: "
                      "stream_name:%r, stream_config:\n%s",
                      self._platform_id, stream_name,
                      self._pp.pformat(stream_config))

        decoder = IonObjectDeserializer(obj_registry=get_obj_registry())

        if 'stream_def_dict' not in stream_config:
            # should not happen: PlatformAgent._validate_configuration validates this.
            log.error("'stream_def_dict' key not in configuration for stream %r" % stream_name)
            return

        stream_def_dict = stream_config['stream_def_dict']
        stream_def_dict['type_'] = 'StreamDefinition'
        stream_def_obj = decoder.deserialize(stream_def_dict)
        self._stream_defs[stream_name] = stream_def_obj

        routing_key           = stream_config['routing_key']
        stream_id             = stream_config['stream_id']
        exchange_point        = stream_config['exchange_point']
        parameter_dictionary  = stream_def_dict['parameter_dictionary']
        log.debug("%r: got parameter_dictionary from stream_def_dict", self._platform_id)

        self._data_streams[stream_name] = stream_id
        self._param_dicts[stream_name] = ParameterDictionary.load(parameter_dictionary)
        stream_route = StreamRoute(exchange_point=exchange_point, routing_key=routing_key)
        publisher = self._create_publisher(stream_id, stream_route)
        self._data_publishers[stream_name] = publisher

        log.debug("%r: created publisher for stream_name=%r", self._platform_id, stream_name)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def validate_driver_configuration(self, driver_config):
        """
        Driver config must include 'oms_uri' entry.
        """
        if not 'oms_uri' in driver_config:
            log.error("'oms_uri' not present in driver_config = %s", driver_config)
            raise PlatformDriverException(msg="driver_config does not indicate 'oms_uri'")

        # validate and process ports
        if not 'ports' in driver_config:
            log.error("port information not present in driver_config = %s", driver_config)
            raise PlatformDriverException(msg="driver_config does not indicate 'ports'")

        # Create an IonObjectDeserializer
        ior = IonObjectRegistry()
        ion_deserializer = IonObjectDeserializer(obj_registry=ior)


        port_info_dict = driver_config['ports']
        for device_id, platform_port_serialized in port_info_dict.iteritems():

            platform_port = ion_deserializer.deserialize(platform_port_serialized)
            ooi_rd = OOIReferenceDesignator(platform_port.reference_designator)
            if ooi_rd.error or not ooi_rd.port:
                log.error("Invalid port information in driver_config. Reference designator: %s", platform_port.reference_designator)
            else:
                #strip leading zeros from port numbers as OMS stores as strings w/o leading zeros
                port_string = str( int(ooi_rd.port) )
                self._active_ports.append(port_string)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_persisted_version(self):

        # create an initial version of SampleResource
        io_serializer = IonObjectSerializer()
        obj = IonObject('SampleResource', {'num': 9, 'other_field': 'test value'})
        obj_dict = io_serializer.serialize(obj,True)
        self.assertEquals(obj_dict['persisted_version'], 1)
        # verify that the simulated previous version does not have new_attribute
        self.assertEquals('new_attribute' in obj_dict, False)

        # simulate version increment to SampleResource that adds new_attribute
        obj_dict['type_'] = 'SampleResource_V2'
        # simulate reading the previous version after version increment
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)
        # verify that “new_attribute” is added and initialized with default value
        self.assertEquals(obj.new_attribute['key'], 'value')
        # verify that old attributes are still there and retain values
        self.assertEquals(obj.num, 9)
        # verify that old attributes are still there and retain values
        self.assertEquals(obj.other_field, 'test value')
        # verify that persisted_version is not updated at read
        self.assertEquals(obj_dict['persisted_version'], 1)

        # simulate update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is updated
        self.assertEquals(obj_dict['persisted_version'], 2)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
class CodecInterceptor(Interceptor):
    """
    Transforms IonObject <-> dict
    """
    def __init__(self):
        Interceptor.__init__(self)
        self._io_serializer = IonObjectSerializer()
        self._io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())

    def outgoing(self, invocation):
        #log.debug("CodecInterceptor.outgoing: %s", invocation)

        #log.debug("Payload, pre-transform: %s", invocation.message)
        invocation.message = self._io_serializer.serialize(invocation.message)
        #log.debug("Payload, post-transform: %s", invocation.message)

        return invocation

    def incoming(self, invocation):
        #log.debug("CodecInterceptor.incoming: %s", invocation)

        payload = invocation.message
        #log.debug("Payload, pre-transform: %s", payload)

        invocation.message = self._io_deserializer.deserialize(payload)
        #log.debug("Payload, post-transform: %s", invocation.message)

        return invocation

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
class IonSerializerDictionaryRepresentation(Representation):
    def __init__(self, id_factory):
        self.encoder = IonObjectSerializer()
        self.decoder = IonObjectDeserializer(obj_registry=get_obj_registry())
        self.id_factory = id_factory
    def encode(self, obj, add_id=False):
        out = self.encoder.serialize(obj)
        if add_id and '_id' not in out.keys():
            out['_id'] = self.id_factory.create_id()
        return out
    def decode(self, data):
        return self.decoder.deserialize(data)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_config(self):
        """
        test_initialize
        Test agent initialize command. This causes creation of
        driver process and transition to inactive.
        """

        # We start in uninitialized state.
        # In this state there is no driver process.
        state = self._ia_client.get_agent_state()
        self.assertEqual(state, ResourceAgentState.UNINITIALIZED)

        # Ping the agent.
        retval = self._ia_client.ping_agent()
        log.info(retval)

        # Initialize the agent.
        # The agent is spawned with a driver config, but you can pass one in
        # optinally with the initialize command. This validates the driver
        # config, launches a driver process and connects to it via messaging.
        # If successful, we switch to the inactive state.
        cmd = AgentCommand(command=ResourceAgentEvent.INITIALIZE)
        retval = self._ia_client.execute_agent(cmd)
        state = self._ia_client.get_agent_state()
        self.assertEqual(state, ResourceAgentState.INACTIVE)

        # Ping the driver proc.
        retval = self._ia_client.ping_resource()
        log.info(retval)

        decoder = IonObjectDeserializer(obj_registry=get_obj_registry())

        # Grab the alarms defined in the config.
        retval = decoder.deserialize(
            self._ia_client.get_agent(['alarms'])['alarms'])
        """
        {'status': None, 'stream_name': 'parsed', 'name': 'test_sim_warning',
        'upper_bound': 5.0, 'expr': 'x<5.0', 'upper_rel_op': '<',
        'lower_rel_op': None, 'type_': 'IntervalAlarmDef', 'value_id': 'temp',
        'lower_bound': None, 'message': 'Temperature is above test range of 5.0.',
        'current_val': None, 'type': 1}
        """
        self.assertEqual(retval[0].type_, 'IntervalAlarmDef')
        self.assertEqual(retval[0].upper_bound, 5.0)
        self.assertEqual(retval[0].expr, 'x<5.0')

        # Reset the agent. This causes the driver messaging to be stopped,
        # the driver process to end and switches us back to uninitialized.
        cmd = AgentCommand(command=ResourceAgentEvent.RESET)
        retval = self._ia_client.execute_agent(cmd)
        state = self._ia_client.get_agent_state()
        self.assertEqual(state, ResourceAgentState.UNINITIALIZED)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_attribute_version(self):

        io_serializer = IonObjectSerializer()

        # verify that extraneous fields given while creating an IonObject raises an error.
        with self.assertRaises(AttributeError):
            IonObject('SampleComplexEvent_V2', {'num': 9, 'other_field': 'test value','more_new_resource':
                {'key':'value'}})

        obj = IonObject('SampleComplexEvent_V2', {'num': 9, 'other_field': 'test value','new_resource':
            {'num': 9, 'other_field': 'test value','new_attribute':{'key':'value'}}})
        obj_dict = io_serializer.serialize(obj,True)
        self.assertEquals(obj_dict['persisted_version'], 2)

        # verify that the simulated previous version data does have new_resource
        self.assertEquals('new_resource' in obj_dict, True)
        # verify that the new_resource has type SampleResource_V2
        self.assertEquals(obj_dict['new_resource']['type_'],"SampleResource_V2")

        # set type to SampleComplexEvent_V3
        obj_dict['type_']="SampleComplexEvent_V3"
        obj_dict['persisted_version']=3
        # set new_resource's type to SampleResource_V3
        # so we pretend that version, not the type, of the attribute has been changed
        obj_dict['new_resource']['type_']="SampleResource_V3"

        # simulate reading SampleComplexEvent_V3 after a new version of new_resource has been introduced
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)

        # verify that new resource is not deleted
        self.assertTrue('new_resource' in obj)
        # verify that new resource does not have new_attribute
        self.assertFalse('new_attribute' in obj.new_resource)
        # verify that the next version of new_resource has default data in the another_new_attribute
        self.assertEquals(obj.new_resource.another_new_attribute['key'], 'new_value')
        # verify that old attributes values of new_resource have not been thrown away
        self.assertEquals(obj.new_resource.num, 9)
        # verify that values from old attributes of SampleComplexEvent_V2 are still there
        self.assertEquals(obj.num, 9)
        self.assertEquals(obj.other_field, 'test value')

        # verify that on read version is not yet updated for the subsumed object
        self.assertEquals(obj.new_resource.persisted_version, 2)

        # simulate create/update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that versions are unchanged
        self.assertEquals(obj_dict['persisted_version'], 3)
        # verify that versions are updated in the subsumed object
        self.assertEquals(obj_dict['new_resource']['persisted_version'], 3)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_complex_version_del_attrib(self):

        io_serializer = IonObjectSerializer()
        # verify that extraneous fields given while creating an IonObject raises an error.
        with self.assertRaises(AttributeError):
            IonObject('SampleComplexEvent_V2', {'num': 9, 'other_field': 'test value','more_new_resource': {'key':'value'}})

        obj = IonObject('SampleComplexEvent_V2', {'num': 9, 'other_field': 'test value','new_resource': {'num': 9, 'other_field': 'test value','new_attribute':{'key':'value'}}})
        # create simulated saved data
        obj_dict = io_serializer.serialize(obj,True)
        self.assertEquals(obj_dict['persisted_version'], 2)
        # simulate a next version data of SampleComplexEvent_V2
        obj_dict['type_'] = 'SampleComplexEvent_V3'

        # verify that the simulated previous version data does have new_resource
        self.assertEquals('new_resource' in obj_dict, True)
        # note the schema version of new_resource
        self.assertEquals(obj_dict['new_resource']['persisted_version'], 2)

        # simulate reading the next version that has a new type of new_resource
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)

        # verify that new_resource exists
        self.assertTrue('new_resource' in obj)
        # however, verify that new_resource does not have new_attribute since type of new_resource has changed
        self.assertFalse('new_attribute' in obj.new_resource)
        # verify that the new type of new_resource has another_new_attribute that is initialized to default data
        self.assertEquals(obj.new_resource.another_new_attribute['key'], 'new_value')
        # verify on read that the schema version of new_resource replaces the old persisted_version
        self.assertEquals(obj.new_resource.persisted_version, 3)

        # verify that old attributes values of new_resource have been thrown away
        self.assertNotEquals(obj.new_resource.num, 9)
        # verify that attributes values of new_resource have been initialized to default values
        self.assertEquals(obj.new_resource.num, 0)

        # However, verify that old attributes of the resource (SampleComplexEvent) are still there
        self.assertEquals(obj.num, 9)
        # verify that old attributes are still there
        self.assertEquals(obj.other_field, 'test value')
        # verify that on read, version is not yet updated
        self.assertEquals(obj.persisted_version, 2)


        # simulate create/update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is updated
        self.assertEquals(obj_dict['persisted_version'], 3)
        # verify that version is updated fo the subsumed object
        self.assertEquals(obj_dict['new_resource']['persisted_version'], 3)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_version_del_attrib(self):

        io_serializer = IonObjectSerializer()

        # verify that extraneous fields given while creating an IonObject raises an error.
        with self.assertRaises(AttributeError):
            IonObject('SampleResource_V2', {'num': 9, 'other_field': 'test value','more_new_attribute': {'key':'value'}})
        # simulate creating a version 2 of SampleResource that has "new_attribute"
        obj = IonObject('SampleResource_V2', {'num': 9, 'other_field': 'test value','new_attribute': {'key':'value'}})
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is 2
        self.assertEquals(obj_dict['persisted_version'], 2)
        # verify that the simulated version 2 data does have new_attribute
        self.assertEquals('new_attribute' in obj_dict, True)


        # simulate incrementing to version 3 that does not have "new_attribute"
        obj_dict['type_'] = 'SampleResource_V3'

        # simulate reading after version increment to 3
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)

        # verify that new attribute is deleted
        self.assertFalse('new_attribute' in obj)
        # verify that the simulated next version data does have more_new_attribute
        self.assertEquals(obj.another_new_attribute['key'], 'new_value')

        # verify that old attributes are still there and retain their data
        self.assertEquals(obj.num, 9)
        # verify that old attributes are still there and retain their data
        self.assertEquals(obj.other_field, 'test value')
        # verify that persisted_version is not yet updated i.e. it is still 2
        self.assertEquals(obj_dict['persisted_version'], 2)

        # simulate update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is updated
        self.assertEquals(obj_dict['persisted_version'], 3)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_stream_ingestion_worker(self):
        self.start_ingestion_worker()

        context_ids, time_ctxt = self._create_param_contexts()
        pdict_id = self.dataset_management_client.create_parameter_dictionary(name='stream_ingestion_pdict', parameter_context_ids=context_ids, temporal_context='ingestion_timestamp')
        self.addCleanup(self.dataset_management_client.delete_parameter_dictionary, pdict_id)

        dataset_id = self.dataset_management_client.create_dataset(name='fake_dataset', description='fake_dataset', stream_id=self.stream_id, parameter_dictionary_id=pdict_id)
        self.addCleanup(self.dataset_management_client.delete_dataset, dataset_id)

        self.cov = self._create_coverage(dataset_id=dataset_id, parameter_dict_id=pdict_id, time_dom=self.time_dom, spatial_dom=self.spatial_dom)
        self.addCleanup(self.cov.close)

        rdt = RecordDictionaryTool(stream_definition_id=self.stream_def_id)
        rdt['conductivity'] = 1
        rdt['pressure'] = 2
        rdt['salinity'] = 3

        self.start_listener(dataset_id)

        self.publisher.publish(rdt.to_granule())
        self.data_modified = Event()
        self.data_modified.wait(30)

        cov = self.get_coverage(dataset_id)
        self.assertIsNotNone(cov.get_parameter_values('raw'))

        deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())

        granule = retrieve_stream(dataset_id)
        rdt_complex = RecordDictionaryTool.load_from_granule(granule)
        rdt_complex['raw'] = [deserializer.deserialize(i) for i in rdt_complex['raw']]
        for gran in rdt_complex['raw']:
            rdt_new = RecordDictionaryTool.load_from_granule(gran)
            self.assertIn(1, rdt_new['conductivity'])
            self.assertIn(2, rdt_new['pressure'])
            self.assertIn(3, rdt_new['salinity'])
            
        cov.close()

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
class CodecInterceptor(Interceptor):
    """
    Transforms IonObject <-> dict
    """
    def __init__(self):
        Interceptor.__init__(self)
        self._io_serializer = IonObjectSerializer()
        self._io_deserializer = IonObjectDeserializer(obj_registry=obj_registry)

    def outgoing(self, invocation):
        log.debug("CodecInterceptor.outgoing: %s", invocation)

        log.debug("Payload, pre-transform: %s", invocation.message)
        invocation.message = self._io_serializer.serialize(invocation.message)
        log.debug("Payload, post-transform: %s", invocation.message)

        return invocation

    def incoming(self, invocation):
        log.debug("CodecInterceptor.incoming: %s", invocation)

        payload = invocation.message
        log.debug("Payload, pre-transform: %s", payload)

        # Horrible, hacky workaround for msgpack issue
        # See http://jira.msgpack.org/browse/MSGPACK-15
        #@todo replace this with use_list in msgpack.unpackb !!!
        def convert_tuples_to_lists(obj):
            if isinstance(obj, tuple):
                res = list(obj)
                return res
            return obj

        payload = walk(payload, convert_tuples_to_lists)

        invocation.message = self._io_deserializer.deserialize(payload)
        log.debug("Payload, post-transform: %s", invocation.message)

        return invocation

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
 def _construct_streams(self, stream_info):
     decoder = IonObjectDeserializer(obj_registry=get_obj_registry())
     for (stream_name, config) in stream_info.iteritems():
         try:
             if config.has_key('stream_def_dict'):
                 stream_def_dict = config['stream_def_dict']
                 stream_def_dict['type_'] = 'StreamDefinition'
                 stream_def_obj = decoder.deserialize(stream_def_dict)
                 self._stream_defs[stream_name] = stream_def_obj
                 rdt = RecordDictionaryTool(stream_definition=stream_def_obj)
             else:
                 stream_def = config['stream_definition_ref']
                 self._stream_defs[stream_name] = stream_def
                 rdt = RecordDictionaryTool(stream_definition_id=stream_def)    
             self._agent.aparam_streams[stream_name] = rdt.fields
             self._agent.aparam_pubrate[stream_name] = 0
         except Exception as e:
             errmsg = 'Instrument agent %s' % self._agent._proc_name
             errmsg += 'error constructing stream %s. ' % stream_name
             errmsg += str(e)
             log.error(errmsg)
             
     self._agent.aparam_set_pubrate = self.aparam_set_pubrate

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def _construct_stream_and_publisher(self, stream_name, stream_config):

        # granule_publish_rate
        # records_per_granule

        if log.isEnabledFor(logging.TRACE):  # pragma: no cover
            log.trace("%r: _construct_stream_and_publisher: "
                      "stream_name:%r, stream_config:\n%s",
                      self._platform_id, stream_name,
                      self._pp.pformat(stream_config))

        decoder = IonObjectDeserializer(obj_registry=get_obj_registry())

        if 'stream_def_dict' in stream_config:
            stream_def_dict = stream_config['stream_def_dict']
            stream_def_dict['type_'] = 'StreamDefinition'
            stream_def_obj = decoder.deserialize(stream_def_dict)
            self._stream_defs[stream_name] = stream_def_obj
            log.debug("%r: using stream_def_dict", self._platform_id)

        else:  # TODO this case to be removed.
            stream_definition_ref = stream_config['stream_definition_ref']
            self._stream_defs[stream_name] = stream_definition_ref
            log.debug("%r: using stream_definition_ref", self._platform_id)

        routing_key           = stream_config['routing_key']
        stream_id             = stream_config['stream_id']
        exchange_point        = stream_config['exchange_point']
        parameter_dictionary  = stream_config['parameter_dictionary']

        self._data_streams[stream_name] = stream_id
        self._param_dicts[stream_name] = ParameterDictionary.load(parameter_dictionary)
        stream_route = StreamRoute(exchange_point=exchange_point, routing_key=routing_key)
        publisher = self._create_publisher(stream_id, stream_route)
        self._data_publishers[stream_name] = publisher

        log.debug("%r: created publisher for stream_name=%r", self._platform_id, stream_name)

# 需要导入模块: from pyon.core.object import IonObjectDeserializer [as 别名]
# 或者: from pyon.core.object.IonObjectDeserializer import deserialize [as 别名]
    def test_event_version_del_attrib(self):

        io_serializer = IonObjectSerializer()

        # verify that extraneous fields given while creating an IonObject raises an error.
        with self.assertRaises(AttributeError):
            IonObject('SampleEvent_V2', {'num': 9, 'other_field': 'test value','more_new_attribute': {'key':'value'}})

        obj = IonObject('SampleEvent_V2', {'num': 9, 'other_field': 'test value','new_attribute': {'key':'value'}})
        obj_dict = io_serializer.serialize(obj,True)
        self.assertEquals(obj_dict['persisted_version'], 2)
        # simulate a next version data of SampleEvent_V2
        obj_dict['type_'] = 'SampleEvent_V3'

        # verify that the simulated previous version data does have new_attribute
        self.assertEquals('new_attribute' in obj_dict, True)
        # simulate reading the next version that does not have new_attribute
        io_deserializer = IonObjectDeserializer(obj_registry=get_obj_registry())
        obj = io_deserializer.deserialize(obj_dict)

        # verify that new attribute is deleted
        self.assertFalse('new_attribute' in obj)
        # verify that the simulated next version data does have more_new_attribute
        self.assertEquals(obj.another_new_attribute['key'], 'new_value')

        # verify that old attributes are still there
        self.assertEquals(obj.num, 9)
        # verify that old attributes are still there
        self.assertEquals(obj.other_field, 'test value')
        # verify that on read version is not yet updated
        self.assertEquals(obj_dict['persisted_version'], 2)

        # simulate create/update
        obj_dict = io_serializer.serialize(obj,True)
        # verify that version is updated
        self.assertEquals(obj_dict['persisted_version'], 3)