| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache |
| * XMLBeans", nor may "Apache" appear in their name, without prior |
| * written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2000-2003 BEA Systems |
| * Inc., <http://www.bea.com/>. For more information on the Apache Software |
| * Foundation, please see <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xmlbeans.impl.util; |
| |
| import java.io.UnsupportedEncodingException; |
| /** |
| * format validation |
| * |
| * This class encodes/decodes hexadecimal data |
| * @author Jeffrey Rodriguez |
| * @version $Id: HexBin.java,v 1.1 2003/09/26 21:23:29 ericvas Exp $ |
| */ |
| public final class HexBin { |
| static private final int BASELENGTH = 255; |
| static private final int LOOKUPLENGTH = 16; |
| static private byte [] hexNumberTable = new byte[BASELENGTH]; |
| static private byte [] lookUpHexAlphabet = new byte[LOOKUPLENGTH]; |
| |
| |
| static { |
| for (int i = 0; i<BASELENGTH; i++ ) { |
| hexNumberTable[i] = -1; |
| } |
| for ( int i = '9'; i >= '0'; i--) { |
| hexNumberTable[i] = (byte) (i-'0'); |
| } |
| for ( int i = 'F'; i>= 'A'; i--) { |
| hexNumberTable[i] = (byte) ( i-'A' + 10 ); |
| } |
| for ( int i = 'f'; i>= 'a'; i--) { |
| hexNumberTable[i] = (byte) ( i-'a' + 10 ); |
| } |
| |
| for(int i = 0; i<10; i++ ) |
| lookUpHexAlphabet[i] = (byte) ('0'+i ); |
| for(int i = 10; i<=15; i++ ) |
| lookUpHexAlphabet[i] = (byte) ('A'+i -10); |
| } |
| |
| /** |
| * byte to be tested if it is Base64 alphabet |
| * |
| * @param octect |
| * @return |
| */ |
| static boolean isHex(byte octect) { |
| return (hexNumberTable[octect] != -1); |
| } |
| |
| /** |
| * Converts bytes to a hex string |
| */ |
| static public String bytesToString(byte[] binaryData) |
| { |
| if (binaryData == null) |
| return null; |
| return new String(encode(binaryData)); |
| } |
| |
| /** |
| * Converts a hex string to a byte array. |
| */ |
| static public byte[] stringToBytes(String hexEncoded) |
| { |
| return decode(hexEncoded.getBytes()); |
| } |
| |
| /** |
| * array of byte to encode |
| * |
| * @param binaryData |
| * @return return encode binary array |
| */ |
| static public byte[] encode(byte[] binaryData) { |
| if (binaryData == null) |
| return null; |
| int lengthData = binaryData.length; |
| int lengthEncode = lengthData * 2; |
| byte[] encodedData = new byte[lengthEncode]; |
| for( int i = 0; i<lengthData; i++ ){ |
| encodedData[i*2] = lookUpHexAlphabet[(binaryData[i] >> 4) & 0xf]; |
| encodedData[i*2+1] = lookUpHexAlphabet[ binaryData[i] & 0xf]; |
| } |
| return encodedData; |
| } |
| |
| static public byte[] decode(byte[] binaryData) { |
| if (binaryData == null) |
| return null; |
| int lengthData = binaryData.length; |
| if (lengthData % 2 != 0) |
| return null; |
| |
| int lengthDecode = lengthData / 2; |
| byte[] decodedData = new byte[lengthDecode]; |
| for( int i = 0; i<lengthDecode; i++ ){ |
| if (!isHex(binaryData[i*2]) || !isHex(binaryData[i*2+1])) { |
| return null; |
| } |
| decodedData[i] = (byte)((hexNumberTable[binaryData[i*2]] << 4) | hexNumberTable[binaryData[i*2+1]]); |
| } |
| return decodedData; |
| } |
| |
| /** |
| * Decodes Hex data into octects |
| * |
| * @param binaryData String containing Hex data |
| * @return string containing decoded data. |
| */ |
| public static String decode(String binaryData) { |
| if (binaryData == null) |
| return null; |
| |
| byte[] decoded = null; |
| try { |
| decoded = decode(binaryData.getBytes("utf-8")); |
| } |
| catch(UnsupportedEncodingException e) { |
| } |
| finally { |
| return decoded == null ? null : new String(decoded); |
| } |
| } |
| |
| /** |
| * Encodes octects (using utf-8) into Hex data |
| * |
| * @param binaryData String containing Hex data |
| * @return string containing decoded data. |
| */ |
| public static String encode(String binaryData) { |
| if (binaryData == null) |
| return null; |
| |
| byte[] encoded = null; |
| try { |
| encoded = encode(binaryData.getBytes("utf-8")); |
| } |
| catch(UnsupportedEncodingException e) {} |
| finally { |
| return encoded == null ? null : new String(encoded); |
| } |
| } |
| |
| } |