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.clients.admin;
  
  import org.apache.kafka.common.KafkaException;
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.acl.AclBinding;
  import org.apache.kafka.common.acl.AclBindingFilter;
  import org.apache.kafka.common.errors.ApiException;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  
  /**
   * The result of the {@link Admin#deleteAcls(Collection)} call.
   */
  public class DeleteAclsResult {
  
      /**
       * A class containing either the deleted ACL binding or an exception if the delete failed.
       */
      public static class FilterResult {
          private final AclBinding binding;
          private final ApiException exception;
  
          FilterResult(AclBinding binding, ApiException exception) {
              this.binding = binding;
              this.exception = exception;
          }
  
          /**
           * Return the deleted ACL binding or null if there was an error.
           */
          public AclBinding binding() {
              return binding;
          }
  
          /**
           * Return an exception if the ACL delete was not successful or null if it was.
           */
          public ApiException exception() {
              return exception;
          }
      }
  
      /**
       * A class containing the results of the delete ACLs operation.
       */
      public static class FilterResults {
          private final List<FilterResult> values;
  
          FilterResults(List<FilterResult> values) {
              this.values = values;
          }
  
          /**
           * Return a list of delete ACLs results for a given filter.
           */
          public List<FilterResult> values() {
              return values;
          }
      }
  
      private final Map<AclBindingFilter, KafkaFuture<FilterResults>> futures;
  
      DeleteAclsResult(Map<AclBindingFilter, KafkaFuture<FilterResults>> futures) {
          this.futures = futures;
      }
  
      /**
       * Return a map from acl filters to futures which can be used to check the status of the deletions by each
       * filter.
       */
      public Map<AclBindingFilter, KafkaFuture<FilterResults>> values() {
          return futures;
      }
  
      /**
       * Return a future which succeeds only if all the ACLs deletions succeed, and which contains all the deleted ACLs.
       * Note that it if the filters don't match any ACLs, this is not considered an error.
       */
      public KafkaFuture<Collection<AclBinding>> all() {
          return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture<?>[0])).thenApply(v -> getAclBindings(futures));
      }
  
      private List<AclBinding> getAclBindings(Map<AclBindingFilter, KafkaFuture<FilterResults>> futures) {
          List<AclBinding> acls = new ArrayList<>();
          for (KafkaFuture<FilterResults> value: futures.values()) {
              FilterResults results;
              try {
                  results = value.get();
              } catch (Throwable e) {
                  // This should be unreachable, since the future returned by KafkaFuture#allOf should
                  // have failed if any Future failed.
                  throw new KafkaException("DeleteAclsResult#all: internal error", e);
              }
              for (FilterResult result : results.values()) {
                  if (result.exception() != null)
                      throw result.exception();
                  acls.add(result.binding());
              }
          }
          return acls;
      }
  }
  