code: /*
   * SPDX-License-Identifier: Apache-2.0
   * Copyright 2018-2019 The Feast Authors
   *
   * 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
   *
   *     https://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.
   */
  package feast.serving.util;
  
  import feast.proto.serving.ServingAPIProto;
  import feast.proto.serving.ServingAPIProto.FeatureReferenceV2;
  import feast.serving.service.FeatureUtil;
  
  public class RequestHelper {
  
    public static void validateOnlineRequest(ServingAPIProto.GetOnlineFeaturesRequest request) {
      // All EntityRows should not be empty
      if (request.getEntitiesCount() <= 0) {
        throw new IllegalArgumentException("Entity value must be provided");
      }
      // All FeatureReferences should have FeatureTable name and Feature name
      for (String featureReference : request.getFeatures().getValList()) {
        validateOnlineRequestFeatureReference(FeatureUtil.parseFeatureReference(featureReference));
      }
    }
  
    public static void validateOnlineRequestFeatureReference(FeatureReferenceV2 featureReference) {
      if (featureReference.getFeatureViewName().isEmpty()) {
        throw new IllegalArgumentException("FeatureTable name must be provided in FeatureReference");
      }
      if (featureReference.getFeatureName().isEmpty()) {
        throw new IllegalArgumentException("Feature name must be provided in FeatureReference");
      }
    }
  }
  