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package com.sun.xml.txw2.output;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.ext.LexicalHandler;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.dom.DOMResult;
import java.util.ArrayList;
import java.util.Stack;
import com.sun.xml.txw2.TxwException;
/**
* {@link XmlSerializer} for {@link javax.xml.transform.dom.DOMResult} and {@link org.w3c.dom.Node}.
*
* @author [email protected]
*/
public class DomSerializer implements XmlSerializer {
// delegate to SaxSerializer
private final SaxSerializer serializer;
public DomSerializer(Node node) {
Dom2SaxAdapter adapter = new Dom2SaxAdapter(node);
serializer = new SaxSerializer(adapter,adapter,false);
}
public DomSerializer(DOMResult domResult) {
Node node = domResult.getNode();
if (node == null) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.newDocument();
domResult.setNode(doc);
serializer = new SaxSerializer(new Dom2SaxAdapter(doc),null,false);
} catch (ParserConfigurationException pce) {
throw new TxwException(pce);
}
} else {
serializer = new SaxSerializer(new Dom2SaxAdapter(node),null,false);
}
}
// XmlSerializer api's - delegate to SaxSerializer
public void startDocument() {
serializer.startDocument();
}
public void beginStartTag(String uri, String localName, String prefix) {
serializer.beginStartTag(uri, localName, prefix);
}
public void writeAttribute(String uri, String localName, String prefix, StringBuilder value) {
serializer.writeAttribute(uri, localName, prefix, value);
}
public void writeXmlns(String prefix, String uri) {
serializer.writeXmlns(prefix, uri);
}
public void endStartTag(String uri, String localName, String prefix) {
serializer.endStartTag(uri, localName, prefix);
}
public void endTag() {
serializer.endTag();
}
public void text(StringBuilder text) {
serializer.text(text);
}
public void cdata(StringBuilder text) {
serializer.cdata(text);
}
public void comment(StringBuilder comment) {
serializer.comment(comment);
}
public void endDocument() {
serializer.endDocument();
}
public void flush() {
// no flushing
}
}
/**
* Builds a DOM tree from SAX2 events.
*
* @author Vivek Pandey
*/
class Dom2SaxAdapter implements ContentHandler, LexicalHandler {
private final Node _node;
private final Stack _nodeStk = new Stack();
private boolean inCDATA;
public final Element getCurrentElement() {
return (Element) _nodeStk.peek();
}
/**
* Document object that owns the specified node.
*/
private final Document _document;
/**
* @param node
* Nodes will be created and added under this object.
*/
public Dom2SaxAdapter(Node node)
{
_node = node;
_nodeStk.push(_node);
if( node instanceof Document )
this._document = (Document)node;
else
this._document = node.getOwnerDocument();
}
/**
* Creates a fresh empty DOM document and adds nodes under this document.
*/
public Dom2SaxAdapter() throws ParserConfigurationException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
factory.setValidating(false);
_document = factory.newDocumentBuilder().newDocument();
_node = _document;
_nodeStk.push( _document );
}
public Node getDOM() {
return _node;
}
public void startDocument() {
}
public void endDocument(){
}
public void startElement(String namespace, String localName, String qName, Attributes attrs){
// some broken DOM implementatino (we confirmed it with SAXON)
// return null from this method.
Element element = _document.createElementNS(namespace, qName);
if( element==null ) {
// if so, report an user-friendly error message,
// rather than dying mysteriously with NPE.
throw new TxwException("Your DOM provider doesn't support the createElementNS method properly");
}
// process namespace bindings
for( int i=0; i