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.sidecar.common.server.dns;
  
  import java.net.UnknownHostException;
  
  /**
   * Resolves hostname to IP address and the other way around
   */
  public interface DnsResolver
  {
      /**
       * Resolves the IP address of the hostname
       *
       * @param hostname the hostname to resolve
       * @return IP address
       * @throws UnknownHostException when the host is not known
       */
      String resolve(String hostname) throws UnknownHostException;
  
      /**
       * Resolves the hostname of the IP address
       *
       * @param address IP address
       * @return hostname
       * @throws UnknownHostException when the host is not known
       */
      String reverseResolve(String address) throws UnknownHostException;
  }
  