/**
* This will create a SAX XMLReader capable of parsing a DTD and configure it so that the DTD
* parsing events are routed to the handlers registered onto this SAXOutputter.
*
* @return <code>XMLReader</code> a SAX2 parser.
* @throws JDOMException if no parser can be created.
*/
private XMLReader createDTDParser() throws JDOMException {
XMLReader parser = null;
// Get a parser instance
try {
parser = createParser();
} catch (Exception ex1) {
throw new JDOMException("Error in SAX parser allocation", ex1);
}
// Register handlers
if (this.getDTDHandler() != null) {
parser.setDTDHandler(this.getDTDHandler());
}
if (this.getEntityResolver() != null) {
parser.setEntityResolver(this.getEntityResolver());
}
if (this.getLexicalHandler() != null) {
try {
parser.setProperty(SAX_PROPERTY_LEXICAL_HANDLER, this.getLexicalHandler());
} catch (SAXException ex1) {
try {
parser.setProperty(SAX_PROPERTY_LEXICAL_HANDLER_ALT, this.getLexicalHandler());
} catch (SAXException ex2) {
// Forget it!
}
}
}
if (this.getDeclHandler() != null) {
try {
parser.setProperty(SAX_PROPERTY_DECLARATION_HANDLER, this.getDeclHandler());
} catch (SAXException ex1) {
try {
parser.setProperty(SAX_PROPERTY_DECLARATION_HANDLER_ALT, this.getDeclHandler());
} catch (SAXException ex2) {
// Forget it!
}
}
}
// Absorb errors as much as possible, per Laurent
parser.setErrorHandler(new DefaultHandler());
return parser;
}
/**
* Converts an HTML document to XML.
*
* @param io io reference
* @param opts html options
* @return parser
* @throws IOException I/O exception
*/
private static IO toXML(final IO io, final HtmlOptions opts) throws IOException {
// reader could not be initialized; fall back to XML
if (READER == null) return io;
try {
// tries to extract the encoding from the input
final TextInput ti = new TextInput(io);
String enc = ti.encoding();
final byte[] content = ti.content();
// looks for a charset definition
final byte[] encoding = token("charset=");
int cs = indexOf(content, encoding);
if (cs > 0) {
// extracts the encoding string
cs += encoding.length;
int ce = cs;
final int cl = content.length;
while (++ce < cl && content[ce] > 0x28) ;
enc = string(substring(content, cs, ce));
}
// define input
final InputSource is = new InputSource(new ArrayInput(content));
is.setEncoding(supported(enc) ? normEncoding(enc) : UTF8);
// define output
final StringWriter sw = new StringWriter();
final XMLReader reader = (XMLReader) Reflect.get(READER);
final Object writer = Reflect.get(WRITER, sw);
// set TagSoup options
if (opts.get(HtmlOptions.HTML)) {
reader.setFeature("http://xml.org/sax/features/namespaces", false);
opt("method", "html");
opt("omit-xml-declaration", "yes");
}
if (opts.get(HtmlOptions.NONS))
reader.setFeature("http://xml.org/sax/features/namespaces", false);
if (opts.get(HtmlOptions.OMITXML)) opt("omit-xml-declaration", "yes");
if (opts.get(HtmlOptions.NOBOGONS)) reader.setFeature(FEATURES + "ignore-bogons", true);
if (opts.get(HtmlOptions.NODEFAULTS))
reader.setFeature(FEATURES + "default-attributes", false);
if (opts.get(HtmlOptions.NOCOLONS)) reader.setFeature(FEATURES + "translate-colons", true);
if (opts.get(HtmlOptions.NORESTART)) reader.setFeature(FEATURES + "restart-elements", false);
if (opts.get(HtmlOptions.IGNORABLE))
reader.setFeature(FEATURES + "ignorable-whitespace", true);
if (opts.get(HtmlOptions.EMPTYBOGONS)) reader.setFeature(FEATURES + "bogons-empty", true);
if (opts.get(HtmlOptions.ANY)) reader.setFeature(FEATURES + "bogons-empty", false);
if (opts.get(HtmlOptions.NOROOTBOGONS)) reader.setFeature(FEATURES + "root-bogons", false);
if (opts.get(HtmlOptions.NOCDATA)) reader.setFeature(FEATURES + "cdata-elements", false);
if (opts.get(HtmlOptions.LEXICAL))
reader.setProperty("http://xml.org/sax/properties/lexical-handler", writer);
if (opts.contains(HtmlOptions.METHOD)) opt("method", opts.get(HtmlOptions.METHOD));
if (opts.contains(HtmlOptions.DOCTYPESYS))
opt("doctype-system", opts.get(HtmlOptions.DOCTYPESYS));
if (opts.contains(HtmlOptions.DOCTYPEPUB))
opt("doctype-public", opts.get(HtmlOptions.DOCTYPEPUB));
if (opts.contains(HtmlOptions.ENCODING)) is.setEncoding(opts.get(HtmlOptions.ENCODING));
// end TagSoup options
reader.setContentHandler((ContentHandler) writer);
reader.parse(is);
return new IOContent(token(sw.toString()), io.name());
} catch (final SAXException ex) {
Util.errln(ex);
return io;
}
}