content: /*
   * Copyright 2019 Aiven Oy and http-connector-for-apache-kafka project contributors
   *
   * 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.
   */
  
  package io.aiven.kafka.connect.http.config;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  
  import org.apache.kafka.common.config.ConfigDef;
  
  /**
   * A {@link ConfigDef.Recommender} that always supports only
   * the predefined set of values. {@link #visible(String, Map)} is always {@code true}.
   */
  class FixedSetRecommender implements ConfigDef.Recommender {
  
      private final List<Object> supportedValues;
  
      private FixedSetRecommender(final Collection<?> supportedValues) {
          Objects.requireNonNull(supportedValues);
          this.supportedValues = new ArrayList<>(supportedValues);
      }
  
      @Override
      public List<Object> validValues(final String name, final Map<String, Object> parsedConfig) {
          return Collections.unmodifiableList(supportedValues);
      }
  
      @Override
      public boolean visible(final String name, final Map<String, Object> parsedConfig) {
          return true;
      }
  
      static FixedSetRecommender ofSupportedValues(final Collection<?> supportedValues) {
          Objects.requireNonNull(supportedValues);
          return new FixedSetRecommender(supportedValues);
      }
  }
  