cheng fan | 48e832c | 2015-05-29 01:54:47 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.pcep.tools; |
| 17 | |
| 18 | import javax.xml.bind.DatatypeConverter; |
| 19 | |
| 20 | /** |
| 21 | * tools fo pcep app. |
| 22 | */ |
| 23 | public abstract class PcepTools { |
| 24 | |
| 25 | private PcepTools() { |
| 26 | |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Converts decimal byte array to a hex string. |
| 31 | * |
| 32 | * @param byteArray byte array |
| 33 | * @return a hex string |
| 34 | */ |
| 35 | public static String toHexString(byte[] byteArray) { |
| 36 | return DatatypeConverter.printHexBinary(byteArray); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Converts a hex string to a decimal byte array. |
| 41 | * |
| 42 | * @param hexString a hex string |
| 43 | * @return byte array |
| 44 | */ |
| 45 | public static byte[] toByteArray(String hexString) { |
| 46 | return DatatypeConverter.parseHexBinary(hexString); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Converts a byte array to a decimal string. |
| 51 | * |
| 52 | * @param bytes a byte array |
| 53 | * @return a decimal string |
| 54 | */ |
| 55 | public static String toDecimalString(byte[] bytes) { |
| 56 | String str = ""; |
| 57 | for (int i = 0; i < bytes.length; i++) { |
| 58 | str += String.valueOf(bytes[i]); |
| 59 | } |
| 60 | return str; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * convert a string to the form of ip address. |
| 65 | * |
| 66 | * @param str a string |
| 67 | * @return a string with ip format |
| 68 | */ |
| 69 | public static String stringToIp(String str) { |
| 70 | long ipInt = Long.parseLong(str, 16); |
| 71 | return longToIp(ipInt); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * convert a long to ip format. |
| 76 | * |
| 77 | * @param ipLong a decimal number. |
| 78 | * @return a ip format string |
| 79 | */ |
| 80 | public static String longToIp(long ipLong) { |
| 81 | StringBuilder sb = new StringBuilder(); |
| 82 | sb.append((ipLong >> 24) & 0xFF).append("."); |
| 83 | sb.append((ipLong >> 16) & 0xFF).append("."); |
| 84 | sb.append((ipLong >> 8) & 0xFF).append("."); |
| 85 | sb.append(ipLong & 0xFF); |
| 86 | return sb.toString(); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * convert a string with ip format to a long. |
| 91 | * |
| 92 | * @param strIp a string with ip format |
| 93 | * @return a long number |
| 94 | */ |
| 95 | public static long ipToLong(String strIp) { |
| 96 | long[] ip = new long[4]; |
| 97 | int position1 = strIp.indexOf("."); |
| 98 | int position2 = strIp.indexOf(".", position1 + 1); |
| 99 | int position3 = strIp.indexOf(".", position2 + 1); |
| 100 | ip[0] = Long.parseLong(strIp.substring(0, position1)); |
| 101 | ip[1] = Long.parseLong(strIp.substring(position1 + 1, position2)); |
| 102 | ip[2] = Long.parseLong(strIp.substring(position2 + 1, position3)); |
| 103 | ip[3] = Long.parseLong(strIp.substring(position3 + 1)); |
| 104 | return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3]; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * get a integer value from a cut string. |
| 109 | * |
| 110 | * @param str a whole string |
| 111 | * @param base cut the string from this index |
| 112 | * @param offset the offset when execute the cut |
| 113 | * @return a integer value |
| 114 | */ |
| 115 | public static int tranferHexStringToInt(String str, int base, int offset) { |
| 116 | return Integer.parseInt(str.substring(base, offset), 16); |
| 117 | |
| 118 | } |
| 119 | } |