Is there a Push-based/Non-blocking XML Parser for Java?

Question

I\'m looking for an XML parser that instead of parsing from an InputStream or InputSource will instead allow blocks of text to be pushed into the parser. E.g. I would like t

Answer 1

Adding another answer as this question remains high for relevant Google searches - aalto-xml 0.9.7 (March 2011) has asynchronous XML pasing. This allows you to pass arbitrary sized chunks of a document to continue parsing, and a new StaX event type EVENT_INCOMPLETE to indicate the input buffer is exhausted and the document remains incomplete.

This is Tatu Salorant's (the author's) example:

     byte[] msg = "Very simple input document!".getBytes();
      AsyncXMLStreamReader asyncReader = new InputFactoryImpl().createAsyncXMLStreamReader();
      final AsyncInputFeeder feeder = asyncReader.getInputFeeder();
      int inputPtr = 0; // as we feed byte at a time
      int type = 0;

      do {
        // May need to feed multiple "segments"
        while ((type = asyncReader.next()) == AsyncXMLStreamReader.EVENT_INCOMPLETE) {
          feeder.feedInput(msg, inputPtr++, 1);
          if (inputPtr >= msg.length) { // to indicate end-of-content (important for error handling)
            feeder.endOfInput();
          }
        }
        // and once we have full event, we just dump out event type (for now)
        System.out.println("Got event of type: "+type);
        // could also just copy event as is, using Stax, or do any other normal non-blocking handling:
        // xmlStreamWriter.copyEventFromReader(asyncReader, false);
      } while (type != AsyncXMLStreamReader.END_DOCUMENT);