match ranges, lists, and specific number strings such as: "200-300" or "200,300,501-700" "*" matches any - Java java.lang

Java examples for java.lang:String Parse

  1. HOME
  2. Java
  3. java.lang
  4. String Parse

Description

match ranges, lists, and specific number strings such as: "200-300" or "200,300,501-700" "*" matches any

Demo Code

/*******************************************************************************
 * This file is part of OpenNMS(R)./*from   w w w  .j  a  v a2s  .  c o  m*/
 *
 * Copyright (C) 2008-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String value = "java2s.com";
        String patterns = "java2s.com";
        System.out.println(matchNumericListOrRange(value, patterns));
    }

    /**
     * Use this method to match ranges, lists, and specific number strings
     * such as:
     * "200-300" or "200,300,501-700"
     * "*" matches any
     * This method is commonly used for matching IP octets or ports
     * 
     * @param value
     * @param patterns
     * @return
     */
    public static boolean matchNumericListOrRange(String value,
            String patterns) {

        String patternList[] = patterns.split(",", 0);
        for (int i = 0; i < patternList.length; i++) {
            if (matchRange(value, patternList[i]))
                return true;
        }
        return false;
    }

    /**
     * Helper method in support of matchNumericListOrRange
     * @param value
     * @param pattern
     * @return
     */
    public static boolean matchRange(String value, String pattern) {
        int dashCount = countChar('-', pattern);

        if ("*".equals(pattern))
            return true;
        else if (dashCount == 0)
            return value.equals(pattern);
        else if (dashCount > 1)
            return false;
        else if (dashCount == 1) {
            String ar[] = pattern.split("-");
            int rangeBegin = Integer.parseInt(ar[0]);
            int rangeEnd = Integer.parseInt(ar[1]);
            int ip = Integer.parseInt(value);
            return (ip >= rangeBegin && ip <= rangeEnd);
        }
        return false;
    }

    public static int countChar(char charIn, String stingIn) {

        int charCount = 0;
        int charIndex = 0;
        for (int i = 0; i < stingIn.length(); i++) {
            charIndex = stingIn.indexOf(charIn, i);
            if (charIndex != -1) {
                charCount++;
                i = charIndex + 1;
            }
        }
        return charCount;
    }
}

Related Tutorials