michael@0: /*
michael@0:  * ====================================================================
michael@0:  * Licensed to the Apache Software Foundation (ASF) under one
michael@0:  * or more contributor license agreements.  See the NOTICE file
michael@0:  * distributed with this work for additional information
michael@0:  * regarding copyright ownership.  The ASF licenses this file
michael@0:  * to you under the Apache License, Version 2.0 (the
michael@0:  * "License"); you may not use this file except in compliance
michael@0:  * with the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *   http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing,
michael@0:  * software distributed under the License is distributed on an
michael@0:  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0:  * KIND, either express or implied.  See the License for the
michael@0:  * specific language governing permissions and limitations
michael@0:  * under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.conn.util;
michael@0: 
michael@0: import java.util.regex.Pattern;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: /**
michael@0:  * A collection of utilities relating to InetAddresses.
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class InetAddressUtils {
michael@0: 
michael@0:     private InetAddressUtils() {
michael@0:     }
michael@0: 
michael@0:     private static final Pattern IPV4_PATTERN =
michael@0:         Pattern.compile(
michael@0:                 "^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$");
michael@0: 
michael@0:     private static final Pattern IPV6_STD_PATTERN =
michael@0:         Pattern.compile(
michael@0:                 "^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$");
michael@0: 
michael@0:     private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
michael@0:         Pattern.compile(
michael@0:                 "^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$");
michael@0: 
michael@0:     public static boolean isIPv4Address(final String input) {
michael@0:         return IPV4_PATTERN.matcher(input).matches();
michael@0:     }
michael@0: 
michael@0:     public static boolean isIPv6StdAddress(final String input) {
michael@0:         return IPV6_STD_PATTERN.matcher(input).matches();
michael@0:     }
michael@0: 
michael@0:     public static boolean isIPv6HexCompressedAddress(final String input) {
michael@0:         return IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
michael@0:     }
michael@0: 
michael@0:     public static boolean isIPv6Address(final String input) {
michael@0:         return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
michael@0:     }
michael@0: 
michael@0: }