qwen loader (#3057)

fastdeploy/model_executor/model_loader/base_loader.py

@@ -0,0 +1,38 @@
+"""
+# Copyright (c) 2025  PaddlePaddle Authors. 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
+# limitations under the License.
+"""
+
+from abc import ABC, abstractmethod
+
+from paddle import nn
+
+from fastdeploy.config import FDConfig, LoadConfig, ModelConfig
+
+
+class BaseModelLoader(ABC):
+    """Base class for model loaders."""
+
+    def __init__(self, load_config: LoadConfig):
+        self.load_config = load_config
+
+    @abstractmethod
+    def download_model(self, load_config: ModelConfig) -> None:
+        """Download a model so that it can be immediately loaded."""
+        raise NotImplementedError
+
+    @abstractmethod
+    def load_model(self, fd_config: FDConfig) -> nn.Layer:
+        """Load a model with the given configurations."""
+        raise NotImplementedError