XMLDOMWriterImpl.java 文件源码

/**
 * creates a DOM Element and appends it to the current element in the tree.
 * @param namespaceURI {@inheritDoc}
 * @param localName {@inheritDoc}
 * @throws javax.xml.stream.XMLStreamException {@inheritDoc}
 */
public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
    if(ownerDoc != null){
        String qualifiedName = null;
        String prefix = null;

        if(namespaceURI == null ){
            throw new XMLStreamException("NamespaceURI cannot be null");
        }
        if(localName == null){
            throw new XMLStreamException("Local name cannot be null");
        }

        if(namespaceContext != null){
            prefix = namespaceContext.getPrefix(namespaceURI);
        }
        if(prefix == null){
            throw new XMLStreamException("Namespace URI "+namespaceURI +
                    "is not bound to any prefix" );
        }
        if("".equals(prefix)){
            qualifiedName = localName;
        }else{
            qualifiedName =  getQName(prefix,localName);
        }

        Element element = ownerDoc.createElementNS(namespaceURI, qualifiedName);

        if(currentNode!=null){
            currentNode.appendChild(element);
        }else{
            ownerDoc.appendChild(element);
        }
        currentNode = element;
    }
    if(needContextPop[depth]){
        namespaceContext.pushContext();
    }
    incDepth();
}