/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */

/*
Extracted from commons-codec
 */
package com.coremedia.iso;

/**
 * Converts hexadecimal Strings.
 */
public class Hex {
    private static final char[] DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    public static String encodeHex(byte[] data) {
        int l = data.length;
        char[] out = new char[l << 1];
        // two characters form the hex value.
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];
            out[j++] = DIGITS[0x0F & data[i]];
        }
        return new String(out);
    }
}

@@ -861,16 +861,55 @@
 a.iso;%0A%0A
+import java.io.ByteArrayOutputStream;%0A%0A
 /**%0A * C
@@ -1442,11 +1442,339 @@
 );%0A    %7D
+%0A%0A    public static byte%5B%5D decodeHex(String hexString) %7B%0A        ByteArrayOutputStream bas = new ByteArrayOutputStream();%0A        for (int i = 0; i %3C hexString.length(); i += 2) %7B%0A            int b = Integer.parseInt(hexString.substring(i, i + 2), 16);%0A            bas.write(b);%0A        %7D%0A        return bas.toByteArray();%0A    %7D
 %0A%7D%0A

Make Hex class symmetric encode plus decode