# Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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from nvflare.apis.dxo import DXO, from_shareable
from nvflare.apis.fl_context import FLContext
from nvflare.apis.shareable import Shareable
from nvflare.app_common.abstract.aggregator import Aggregator
[docs]
class NumDXOAggregator(Aggregator):
def __init__(self):
Aggregator.__init__(self)
self.value = 0
self.count = 0
[docs]
def accept(self, shareable: Shareable, fl_ctx: FLContext) -> bool:
dxo = from_shareable(shareable)
if dxo.data_kind != "number":
raise ValueError(f"data_kind must be 'number' but got {dxo.data_kind}")
value = dxo.data.get("value", 0)
count = dxo.data.get("count", 1)
self.value += value
self.count += count
return True
[docs]
def aggregate(self, fl_ctx: FLContext) -> Shareable:
dxo = DXO(data_kind="number", data={"value": self.value, "count": self.count})
return dxo.to_shareable()