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.security.authorizer;
  
  import org.apache.kafka.common.acl.AclOperation;
  import org.apache.kafka.common.protocol.Errors;
  import org.apache.kafka.common.resource.ResourcePattern;
  import org.apache.kafka.common.resource.ResourceType;
  import org.apache.kafka.common.security.auth.KafkaPrincipal;
  
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  import static org.apache.kafka.common.acl.AclOperation.ALTER;
  import static org.apache.kafka.common.acl.AclOperation.ALTER_CONFIGS;
  import static org.apache.kafka.common.acl.AclOperation.CLUSTER_ACTION;
  import static org.apache.kafka.common.acl.AclOperation.CREATE;
  import static org.apache.kafka.common.acl.AclOperation.CREATE_TOKENS;
  import static org.apache.kafka.common.acl.AclOperation.DELETE;
  import static org.apache.kafka.common.acl.AclOperation.DESCRIBE;
  import static org.apache.kafka.common.acl.AclOperation.DESCRIBE_CONFIGS;
  import static org.apache.kafka.common.acl.AclOperation.DESCRIBE_TOKENS;
  import static org.apache.kafka.common.acl.AclOperation.IDEMPOTENT_WRITE;
  import static org.apache.kafka.common.acl.AclOperation.READ;
  import static org.apache.kafka.common.acl.AclOperation.TWO_PHASE_COMMIT;
  import static org.apache.kafka.common.acl.AclOperation.WRITE;
  
  public class AclEntry {
  
      public static final KafkaPrincipal WILDCARD_PRINCIPAL = new KafkaPrincipal(KafkaPrincipal.USER_TYPE, "*");
      public static final String WILDCARD_PRINCIPAL_STRING = WILDCARD_PRINCIPAL.toString();
      public static final String WILDCARD_HOST = "*";
      public static final String WILDCARD_RESOURCE = ResourcePattern.WILDCARD_RESOURCE;
      public static final Set<AclOperation> ACL_OPERATIONS = Arrays.stream(AclOperation.values())
          .filter(t -> !(t == AclOperation.UNKNOWN || t == AclOperation.ANY))
          .collect(Collectors.toSet());
  
      public static Set<AclOperation> supportedOperations(ResourceType resourceType) {
          switch (resourceType) {
              case TOPIC:
                  return new HashSet<>(Arrays.asList(READ, WRITE, CREATE, DESCRIBE, DELETE, ALTER, DESCRIBE_CONFIGS, ALTER_CONFIGS));
              case GROUP:
                  return new HashSet<>(Arrays.asList(READ, DESCRIBE, DELETE, DESCRIBE_CONFIGS, ALTER_CONFIGS));
              case CLUSTER:
                  return new HashSet<>(Arrays.asList(CREATE, CLUSTER_ACTION, DESCRIBE_CONFIGS, ALTER_CONFIGS, IDEMPOTENT_WRITE, ALTER, DESCRIBE));
              case TRANSACTIONAL_ID:
                  return new HashSet<>(Arrays.asList(DESCRIBE, WRITE, TWO_PHASE_COMMIT));
              case DELEGATION_TOKEN:
                  return Set.of(DESCRIBE);
              case USER:
                  return new HashSet<>(Arrays.asList(CREATE_TOKENS, DESCRIBE_TOKENS));
              default:
                  throw new IllegalArgumentException("Not a concrete resource type");
          }
      }
  
      public static Errors authorizationError(ResourceType resourceType) {
          switch (resourceType) {
              case TOPIC:
                  return Errors.TOPIC_AUTHORIZATION_FAILED;
              case GROUP:
                  return Errors.GROUP_AUTHORIZATION_FAILED;
              case CLUSTER:
                  return Errors.CLUSTER_AUTHORIZATION_FAILED;
              case TRANSACTIONAL_ID:
                  return Errors.TRANSACTIONAL_ID_AUTHORIZATION_FAILED;
              case DELEGATION_TOKEN:
                  return Errors.DELEGATION_TOKEN_AUTHORIZATION_FAILED;
              default:
                  throw new IllegalArgumentException("Authorization error type not known");
          }
      }
  }
  