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1 /* 2 Loader - tool for transfering data from one JDBC source to another and 3 doing transformations during copy. 4 Copyright (C) 2002-2003 Together 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 This library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 You should have received a copy of the GNU Lesser General Public 14 License along with this library; if not, write to the Free Software 15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 Loader.java 17 Date: 03.03.2003. 18 @version 2.1 alpha 19 @authors: 20 Radoslav Dutina rale@prozone.co.yu 21 */ 22 23 24 25 package org.webdocwf.util.loader; 26 27 import java.io.*; 28 29 /*** 30 * ToAndFromHex class is used for transformation binary objects to string object, and 31 * string object to binary object 32 * @author Radoslav Dutina 33 * @version 1.0 34 */ 35 public class ToAndFromHex { 36 37 /*** 38 * Empty constructor of ToAndFromHex class 39 */ 40 public ToAndFromHex() { 41 } 42 43 /*** 44 * This method transform binary object to string object 45 * @param b is array of bytes which represents binary object 46 * @return string representation of binary object 47 */ 48 public static String getStringFromBlob(byte[] b){ 49 50 if(b!=null){ 51 ByteArrayInputStream is=new ByteArrayInputStream(b); 52 53 char[] hexBytes = { 54 '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' 55 }; 56 57 int c; 58 String hexString=new String(); 59 while ((c = is.read()) >= 0) { 60 hexString+=(hexBytes[(c >> 4) & 0xf]); 61 hexString+=(hexBytes[c & 0xf]); 62 } 63 return hexString; 64 }else{ 65 return null; 66 } 67 } 68 69 /*** 70 * This method transform string object to binary object (array of bytes) 71 * @param val is string representation of binary object 72 * @return binary object 73 */ 74 public static byte[] getByteArrayFromString(String val){ 75 byte[] buf = new byte[val.length() / 2]; 76 final char[] hexBytes = { 77 '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' 78 }; 79 byte[] hexMap = new byte[256]; 80 for (int i = 0; i < hexBytes.length; i++) { 81 hexMap[hexBytes[i]] = (byte)i; 82 } 83 int pos = 0; 84 for (int i = 0; i < buf.length; i++) { 85 buf[i] = (byte)(hexMap[val.charAt(pos++)] << 4); 86 buf[i] += hexMap[val.charAt(pos++)]; 87 } 88 return buf; 89 } 90 91 92 }

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