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.common.acl;
  
  import org.apache.kafka.common.resource.ResourcePatternFilter;
  
  import java.util.Objects;
  
  /**
   * A filter which can match AclBinding objects.
   */
  public class AclBindingFilter {
      private final ResourcePatternFilter patternFilter;
      private final AccessControlEntryFilter entryFilter;
  
      /**
       * A filter which matches any ACL binding.
       */
      public static final AclBindingFilter ANY = new AclBindingFilter(ResourcePatternFilter.ANY, AccessControlEntryFilter.ANY);
  
      /**
       * Create an instance of this filter with the provided parameters.
       *
       * @param patternFilter non-null pattern filter
       * @param entryFilter non-null access control entry filter
       */
      public AclBindingFilter(ResourcePatternFilter patternFilter, AccessControlEntryFilter entryFilter) {
          this.patternFilter = Objects.requireNonNull(patternFilter, "patternFilter");
          this.entryFilter = Objects.requireNonNull(entryFilter, "entryFilter");
      }
  
      /**
       * @return {@code true} if this filter has any UNKNOWN components.
       */
      public boolean isUnknown() {
          return patternFilter.isUnknown() || entryFilter.isUnknown();
      }
  
      /**
       * @return the resource pattern filter.
       */
      public ResourcePatternFilter patternFilter() {
          return patternFilter;
      }
  
      /**
       * @return the access control entry filter.
       */
      public final AccessControlEntryFilter entryFilter() {
          return entryFilter;
      }
  
      @Override
      public String toString() {
          return "(patternFilter=" + patternFilter + ", entryFilter=" + entryFilter + ")";
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          AclBindingFilter that = (AclBindingFilter) o;
          return Objects.equals(patternFilter, that.patternFilter) &&
              Objects.equals(entryFilter, that.entryFilter);
      }
  
      /**
       * Return true if the resource and entry filters can only match one ACE. In other words, if
       * there are no ANY or UNKNOWN fields.
       */
      public boolean matchesAtMostOne() {
          return patternFilter.matchesAtMostOne() && entryFilter.matchesAtMostOne();
      }
  
      /**
       * Return a string describing an ANY or UNKNOWN field, or null if there is no such field.
       */
      public String findIndefiniteField() {
          String indefinite = patternFilter.findIndefiniteField();
          if (indefinite != null)
              return indefinite;
          return entryFilter.findIndefiniteField();
      }
  
      /**
       * Return true if the resource filter matches the binding's resource and the entry filter matches binding's entry.
       */
      public boolean matches(AclBinding binding) {
          return patternFilter.matches(binding.pattern()) && entryFilter.matches(binding.entry());
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(patternFilter, entryFilter);
      }
  }
  