StAX return unknown case

Question

i am using StAX for processing huge xml file. as shown below in the code, in the switch-case there is a default condition. when i run the code the text in the default case prints the following:

unhandled case4

what is case4? i tried to java docs for Stax but i could not find it...it seems that XMLStreamConstants.START_ELEMENT has constant int value of 1 and XMLStreamConstants.END_ELEMENT has constant value of 2...but which one is 4?

code:

for (int event = mStAXParser.next(); event != XMLStreamConstants.END_DOCUMENT; event = mStAXParser.next()) {

        switch (event) {
        case XMLStreamConstants.START_ELEMENT:

            Log.d(TAG, "main", "@START_ELEMENT");
            Log.d(TAG, "main", "getLocalName(): "+mStAXParser.getLocalName());
            Log.d(TAG, "main", "getAttributeCount(): "+mStAXParser.getAttributeCount());
            Log.d(TAG, "main", "getAttributeLocalName(): "+mStAXParser.getAttributeLocalName(1));
            Log.d(TAG, "main", "getAttributeValue(): "+mStAXParser.getAttributeValue(0));

            break;

        case XMLStreamConstants.END_ELEMENT:
            Log.d(TAG, "main", "@END_ELEMENT");
            Log.d(TAG, "main", "getLocalName():"+mStAXParser.getLocalName());

            break;

        default:
            Log.wtf(TAG, "main", "unhandled case" + event);
        }
    }

Answer 1

See https://docs.oracle.com/javase/8/docs/api/constant-values.html#javax.xml.stream.XMLStreamConstants.CHARACTERS, it is characters which has the value 4.