/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed 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 com.alibaba.nacos.client.utils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * ip tool
 *
 * @author Nacos
 */
@SuppressWarnings("PMD.ClassNamingShouldBeCamelRule")
public class IPUtil {

    private static final String IPV4_PATTERN = "^((25[0-5]|2[0-4]\\d|[01]?\\d\\d?)\\.){3}(25[0-5]|2[0-4]\\d|[01]?\\d\\d?)$";
    private static final String IPV6_PATTERN = "^([\\da-fA-F]{1,4}:){7}[\\da-fA-F]{1,4}$";

    public static boolean isIPV4(String addr) {
        return isMatch(addr, IPV4_PATTERN);
    }

    public static boolean isIPV6(String addr) {
        return isMatch(addr, IPV6_PATTERN);
    }

    private static boolean isMatch(String data, String pattern) {
        if (StringUtils.isBlank(data)) {
            return false;
        }
        Pattern pat = Pattern.compile(pattern);
        Matcher mat = pat.matcher(data);
        return mat.find();
    }
}

@@ -852,30 +852,31 @@
 tatic final 
-String
+Pattern
  IPV4_PATTER
@@ -879,16 +879,32 @@
 TTERN = 
+Pattern.compile(
 %22%5E((25%5B0
@@ -971,16 +971,17 @@
 d%5C%5Cd?)$%22
+)
 ;%0A    pr
@@ -999,22 +999,23 @@
 c final 
-String
+Pattern
  IPV6_PA
@@ -1022,16 +1022,32 @@
 TTERN = 
+Pattern.compile(
 %22%5E(%5B%5C%5Cda
@@ -1080,16 +1080,17 @@
 %5D%7B1,4%7D$%22
+)
 ;%0A%0A    p
@@ -1330,22 +1330,23 @@
 g data, 
-String
+Pattern
  pattern
@@ -1430,56 +1430,8 @@
   %7D%0A
-        Pattern pat = Pattern.compile(pattern);%0A
     
@@ -1451,16 +1451,20 @@
 at = pat
+tern
 .matcher

add ip pattern