StaxEventXMLReader.java 文件源码

@Override
protected void parseInternal() throws SAXException, XMLStreamException {
    boolean documentStarted = false;
    boolean documentEnded = false;
    int elementDepth = 0;
    while (this.reader.hasNext() && elementDepth >= 0) {
        XMLEvent event = this.reader.nextEvent();
        if (!event.isStartDocument() && !event.isEndDocument() && !documentStarted) {
            handleStartDocument(event);
            documentStarted = true;
        }
        switch (event.getEventType()) {
            case XMLStreamConstants.START_DOCUMENT:
                handleStartDocument(event);
                documentStarted = true;
                break;
            case XMLStreamConstants.START_ELEMENT:
                elementDepth++;
                handleStartElement(event.asStartElement());
                break;
            case XMLStreamConstants.END_ELEMENT:
                elementDepth--;
                if (elementDepth >= 0) {
                    handleEndElement(event.asEndElement());
                }
                break;
            case XMLStreamConstants.PROCESSING_INSTRUCTION:
                handleProcessingInstruction((ProcessingInstruction) event);
                break;
            case XMLStreamConstants.CHARACTERS:
            case XMLStreamConstants.SPACE:
            case XMLStreamConstants.CDATA:
                handleCharacters(event.asCharacters());
                break;
            case XMLStreamConstants.END_DOCUMENT:
                handleEndDocument();
                documentEnded = true;
                break;
            case XMLStreamConstants.NOTATION_DECLARATION:
                handleNotationDeclaration((NotationDeclaration) event);
                break;
            case XMLStreamConstants.ENTITY_DECLARATION:
                handleEntityDeclaration((EntityDeclaration) event);
                break;
            case XMLStreamConstants.COMMENT:
                handleComment((Comment) event);
                break;
            case XMLStreamConstants.DTD:
                handleDtd((DTD) event);
                break;
            case XMLStreamConstants.ENTITY_REFERENCE:
                handleEntityReference((EntityReference) event);
                break;
        }
    }
    if (documentStarted && !documentEnded) {
        handleEndDocument();
    }

}