Java ID Value Create createID()

Description

Generates a unique Id for Authentication Requests

License

Open Source License

Return

generated unique ID

Declaration

public static String createID() 

Method Source Code

//package com.java2s;
/*//from w  w w.j  a  v  a 2  s.  c  o  m
*  Copyright (c) WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
*  WSO2 Inc. 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.
*/

import java.util.Random;

public class Main {
    /**
      * Generates a unique Id for Authentication Requests
      *
      * @return generated unique ID
      */
    public static String createID() {

        byte[] bytes = new byte[20]; // 160 bit

        new Random().nextBytes(bytes);

        char[] charMapping = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p' };

        char[] chars = new char[40];

        for (int i = 0; i < bytes.length; i++) {
            int left = (bytes[i] >> 4) & 0x0f;
            int right = bytes[i] & 0x0f;
            chars[i * 2] = charMapping[left];
            chars[i * 2 + 1] = charMapping[right];
        }

        return String.valueOf(chars);
    }
}

Related

1. createID()
2. generateId()
3. generateId()
4. generateId()