Can I create a DOM Document from an encoded UTF-8 byte array?

Question

My situation: I have a method that accepts a byte array. The array in question is encoded using UTF-8 and was originally an XML message. I would like to be able to re-construct this message using a DOM parser. I know I can create a Document from a byte array through the use of a ByteBuffer. The only problem is that if I put this directly into action on the passed byte array, it will create a corrupted Document (if possible at all). That is because the array is an encoded XML message, encoded in UTF-8. However, when I decode the array by the use of the decode() method, I get a CharBuffer returned:

ByteBuffer encodedData = ByteBuffer.wrap(data);
CharBuffer decodedData = Charset.forName("UTF-8").decode(encodedData);

I don't know how to construct a Document from this, as there are no parse() methods defined in the DocumentBuilder that will accept a CharBuffer....

Could anyone help me with this?

Qwerky · Accepted Answer · 2011-02-18 11:29:32Z

5

DocumentBuilder has a parse(InputStream is) method, you can create your document by passing in a ByteArrayInputStream created from your bytes.

Document doc = DocumentBuilder.parse(new ByteArrayInputStream(data));

answered Feb 18, 2011 at 11:29

Qwerky

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1 Comment

Joachim Sauer Over a year ago

Just as a note: This is one of the rare cases where you don't need to specify the encoding, because XML data has to contain enough information to find out the encoding itself (if it's well-formed).

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