"""Attribute container JSON serializer."""
from acstore.containers import interface as containers_interface
from acstore.containers import manager as containers_manager
from acstore.helpers import schema as schema_helper
[docs]
class AttributeContainerJSONSerializer:
"""Attribute container JSON serializer."""
_CONTAINERS_MANAGER = containers_manager.AttributeContainersManager
[docs]
@classmethod
def ConvertAttributeContainerToJSON(cls, attribute_container):
"""Converts an attribute container object into a JSON dictioary.
The resulting dictionary of the JSON serialized objects consists of:
{
'__type__': 'AttributeContainer'
'__container_type__': ...
...
}
Here '__type__' indicates the object base type. In this case
'AttributeContainer'.
'__container_type__' indicates the container type and rest of the elements
of the dictionary that make up the attributes of the container.
Args:
attribute_container (AttributeContainer): attribute container.
Returns:
dict[str, object]: JSON serialized objects.
"""
try:
schema = cls._CONTAINERS_MANAGER.GetSchema(
attribute_container.CONTAINER_TYPE
)
except ValueError:
schema = {}
json_dict = {
"__type__": "AttributeContainer",
"__container_type__": attribute_container.CONTAINER_TYPE,
}
for attribute_name, attribute_value in attribute_container.GetAttributes():
data_type = schema.get(attribute_name)
if data_type == "AttributeContainerIdentifier" and isinstance(
attribute_value, containers_interface.AttributeContainerIdentifier
):
attribute_value = attribute_value.CopyToString()
else:
serializer = schema_helper.SchemaHelper.GetAttributeSerializer(
data_type, "json"
)
if serializer:
attribute_value = serializer.SerializeValue(attribute_value)
# JSON will not serialize certain runtime types like set, therefore
# these are cast to list first.
if isinstance(attribute_value, set):
attribute_value = list(attribute_value)
json_dict[attribute_name] = attribute_value
return json_dict
[docs]
@classmethod
def ConvertJSONToAttributeContainer(cls, json_dict):
"""Converts a JSON dictionary into an attribute container object.
The dictionary of the JSON serialized objects consists of:
{
'__type__': 'AttributeContainer'
'__container_type__': ...
...
}
Here '__type__' indicates the object base type. In this case
'AttributeContainer'.
'__container_type__' indicates the container type and rest of the elements
of the dictionary that make up the attributes of the container.
Args:
json_dict (dict[str, object]): JSON serialized objects.
Returns:
AttributeContainer: attribute container.
"""
# Use __container_type__ to indicate the attribute container type.
container_type = json_dict.get("__container_type__")
attribute_container = cls._CONTAINERS_MANAGER.CreateAttributeContainer(
container_type
)
try:
schema = cls._CONTAINERS_MANAGER.GetSchema(container_type)
except ValueError:
schema = {}
supported_attribute_names = attribute_container.GetAttributeNames()
for attribute_name, attribute_value in json_dict.items():
if attribute_name in ("__container_type__", "__type__"):
continue
# Be strict about which attributes to set.
if attribute_name not in supported_attribute_names:
continue
data_type = schema.get(attribute_name)
if data_type == "AttributeContainerIdentifier":
identifier = containers_interface.AttributeContainerIdentifier()
identifier.CopyFromString(attribute_value)
attribute_value = identifier
else:
serializer = schema_helper.SchemaHelper.GetAttributeSerializer(
data_type, "json"
)
if serializer:
attribute_value = serializer.DeserializeValue(attribute_value)
setattr(attribute_container, attribute_name, attribute_value)
return attribute_container