code: /*
   * SPDX-License-Identifier: Apache-2.0
   * Copyright 2018-2020 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.service;
  
  import feast.proto.serving.ServingAPIProto.FeatureReferenceV2;
  
  public class FeatureUtil {
  
    /**
     * Accepts FeatureReferenceV2 object and returns its reference in String
     * "featuretable_name:feature_name".
     *
     * @param featureReference {@link FeatureReferenceV2}
     * @return String format of FeatureReferenceV2
     */
    public static String getFeatureReference(FeatureReferenceV2 featureReference) {
      String ref = featureReference.getFeatureName();
      if (!featureReference.getFeatureViewName().isEmpty()) {
        ref = featureReference.getFeatureViewName() + ":" + ref;
      }
      return ref;
    }
  
    public static FeatureReferenceV2 parseFeatureReference(String featureReference) {
      String[] tokens = featureReference.split(":", 2);
      return FeatureReferenceV2.newBuilder()
          .setFeatureViewName(tokens[0])
          .setFeatureName(tokens[1])
          .build();
    }
  }
  