content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.kafka.image.node;
  
  import org.apache.kafka.clients.admin.ScramMechanism;
  import org.apache.kafka.image.ScramImage;
  import org.apache.kafka.metadata.ScramCredentialData;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Map;
  
  
  public class ScramImageNode implements MetadataNode {
      /**
       * The name of this node.
       */
      public static final String NAME = "scram";
  
      /**
       * The SCRAM image.
       */
      private final ScramImage image;
  
      public ScramImageNode(ScramImage image) {
          this.image = image;
      }
  
      @Override
      public Collection<String> childNames() {
          ArrayList<String> childNames = new ArrayList<>();
          for (ScramMechanism mechanism : ScramMechanism.values()) {
              if (!mechanism.equals(ScramMechanism.UNKNOWN)) {
                  childNames.add(mechanism.mechanismName());
              }
          }
          return childNames;
      }
  
      @Override
      public MetadataNode child(String name) {
          ScramMechanism mechanism = ScramMechanism.fromMechanismName(name);
          if (mechanism.equals(ScramMechanism.UNKNOWN)) return null;
          Map<String, ScramCredentialData> userData = image.mechanisms().get(mechanism);
          return new ScramMechanismNode(userData == null ? Map.of() : userData);
      }
  }
  