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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package com.gsma.rcs.utils;
  
  import java.util.regex.Pattern;
  
  /**
   * A collection of utilities relating to InetAddresses.
   *
   * @since 4.0
   */
  public class InetAddressUtils {
  
      private InetAddressUtils() {
      }
  
      private static final Pattern IPV4_PATTERN = Pattern
              .compile("^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$");
  
      private static final Pattern IPV6_STD_PATTERN = Pattern
              .compile("^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$");
  
      private static final Pattern IPV6_HEX_COMPRESSED_PATTERN = Pattern
              .compile("^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$");
  
      public static boolean isIPv4Address(final String input) {
          return IPV4_PATTERN.matcher(input).matches();
      }
  
      public static boolean isIPv6StdAddress(final String input) {
          return IPV6_STD_PATTERN.matcher(input).matches();
      }
  
      public static boolean isIPv6HexCompressedAddress(final String input) {
          return IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
      }
  
      public static boolean isIPv6Address(final String input) {
          return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
      }
  
  }
  