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.cassandra.config;
  
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  import com.google.common.base.Preconditions;
  import com.google.common.collect.ImmutableSet;
  
  import inet.ipaddr.IPAddressNetwork;
  import inet.ipaddr.IPAddressString;
  
  /**
   * When a group of subnets are needed, this class can be used to represent the group as if it was a single subnet.
   *
   * This class supports IPV4 and IPV6 subnets
   */
  public class SubnetGroups
  {
      public Set<Group> subnets = Collections.emptySet();
  
      public SubnetGroups()
      {
      }
  
      /** Used by SnakeYaml */
      @SuppressWarnings("unused")
      public SubnetGroups(List<String> values)
      {
          this.subnets = ImmutableSet.copyOf(values.stream().map(Group::new).collect(Collectors.toSet()));
      }
  
      public boolean contains(SocketAddress address)
      {
          Preconditions.checkNotNull(address);
          Preconditions.checkArgument(address instanceof InetSocketAddress, "Unsupported socket address type: " + address.getClass());
          return contains(((InetSocketAddress) address).getAddress());
      }
  
      public boolean contains(InetAddress address)
      {
          for (Group group : subnets)
          {
              if (group.contains(address))
              {
                  return true;
              }
          }
          return false;
      }
  
      public boolean isEmpty()
      {
          return subnets.isEmpty();
      }
  
      @Override
      public boolean equals(Object o)
      {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          SubnetGroups that = (SubnetGroups) o;
          return subnets.equals(that.subnets);
      }
  
      @Override
      public int hashCode()
      {
          return Objects.hash(subnets);
      }
  
      @Override
      public String toString()
      {
          return "SubnetGroups{" +
                 "subnets=" + subnets +
                 '}';
      }
  
      private static class Group
      {
          private static final IPAddressNetwork.IPAddressGenerator IP_ADDRESS_GENERATOR = new IPAddressNetwork.IPAddressGenerator();
  
          private final IPAddressString subnet;
  
          Group(String range)
          {
              subnet = new IPAddressString(range);
          }
  
          boolean contains(InetAddress address)
          {
              return subnet.contains(IP_ADDRESS_GENERATOR.from(address).toAddressString());
          }
  
          @Override
          public boolean equals(Object o)
          {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
              Group group = (Group) o;
              return subnet.equals(group.subnet);
          }
  
          @Override
          public int hashCode()
          {
              return Objects.hash(subnet);
          }
  
          @Override
          public String toString()
          {
              return subnet.toString();
          }
      }
  }
  