/*
* Copyright 2003, 2004 The Apache Software Foundation
*
* Licensed 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.
*
*/
package org.geotools.xml.impl;
/** <p>Utility class for xs:hexbinary.</p>
*
*
* @source $URL$
*/
public class HexBinary {
/** Creates a clone of the given byte array.
*/
public static byte[] getClone(byte[] pHexBinary) {
byte[] result = new byte[pHexBinary.length];
System.arraycopy(pHexBinary, 0, result, 0, pHexBinary.length);
return result;
}
/** Converts the string <code>pValue</code> into an
* array of hex bytes.
*/
public static byte[] decode(String pValue) {
if ((pValue.length() % 2) != 0) {
throw new IllegalArgumentException("A HexBinary string must have even length.");
}
byte[] result = new byte[pValue.length() / 2];
int j = 0;
for (int i = 0; i < pValue.length(); ) {
byte b;
char c = pValue.charAt(i++);
char d = pValue.charAt(i++);
if (c >= '0' && c <= '9') {
b = (byte) ((c - '0') << 4);
} else if (c >= 'A' && c <= 'F') {
b = (byte) ((c - 'A' + 10) << 4);
} else if (c >= 'a' && c <= 'f') {
b = (byte) ((c - 'a' + 10) << 4);
} else {
throw new IllegalArgumentException("Invalid hex digit: " + c);
}
if (d >= '0' && d <= '9') {
b += (byte) (d - '0');
} else if (d >= 'A' && d <= 'F') {
b += (byte) (d - 'A' + 10);
} else if (d >= 'a' && d <= 'f') {
b += (byte) (d - 'a' + 10);
} else {
throw new IllegalArgumentException("Invalid hex digit: " + d);
}
result[j++] = b;
}
return result;
}
/** Converts the byte array <code>pHexBinary</code> into
* a string.
*/
public static String encode(byte[] pHexBinary) {
StringBuffer result = new StringBuffer();
for (int i = 0; i < pHexBinary.length; i++) {
byte b = pHexBinary[i];
byte c = (byte) ((b & 0xf0) >> 4);
if (c <= 9) {
result.append((char) ('0' + c));
} else {
result.append((char) ('A' + c - 10));
}
c = (byte) (b & 0x0f);
if (c <= 9) {
result.append((char) ('0' + c));
} else {
result.append((char) ('A' + c - 10));
}
}
return result.toString();
}
}