@Override
    public Object parse(SourceData sourceData, int rowIndex, Context context) {
        Object valueObj = valueParser.parse(sourceData, rowIndex, context);
        if (valueObj == null) {
            return null;
        }
        return hexToString(OperatorTools.parseString(valueObj));
    }
UnHexFunction  -> unhex(str)
description:
Return null if 'str' is null;
Return the result of interpreting each pair of characters in the argument as the character corresponding
       to its hexadecimal number.
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/string/UnHexFunction.java