Question

So I am using DocumentBuilderFactory and DocumentBuilder to parse an xml.
So it is DOM parser.

But what I am trying to do is extract byte-array data (its an image encoded in base64)

Store it in one object and later in code write it out to another xml encoded in base64.

What is the best way to store this in btw.
Store it as string? or as ByteArray?

How can I extract byte array data in best way and write it out.

I am not experienced with this so wanted to get opinion from the group.

UPDATE: I am given XML I do not have control of incoming XML that comes in binary64 encoded

< byte-array >
  ... base64 encoded image ...
< /byte-array >

Using parser I have I need to store this node and question is should that be byte or string
and then writing it out to another node in new xml. again in base64 encoding.

thanks

Answer 1

The image should be stored in the first xml as a string. Perhaps something like this:

<img src="data:image/gif;base64,sssssssssssss"/>

If you need to write the same data to the second xml just use the same string which is already encoded. If you need to change the image. Get the attribute (element.getAttribute("src")), decode it with one of the many libraries (apache commons codec) and then reencode it as a string for the second xml.

UPDATE RESPONSE:

As to your update. Inside the <byte-array> element you should have plain text. It could be stored as text and then used as text in the second xml.