XFastParser

DRAFT See FastParser, XFastDocumentHandler, XFastContextHandler

IDL

module com {  module sun {  module star {  module xml {  module sax {  
 
/** specifies a SAX parser that uses integer values for known xml names
	(elements, attributes and attribute values). The parser also handles
	namespaces and allows to have individual contexts for each xml element.

	<p>Before parsing is possible you have to set your
	<type>XFastDocumentHandler</type> using <member>setFastDocumentHandler</member>.
	
	<p>Parsing starts with calling <member>parseStream</member>. If the parser
	finds a valid xml file with the given <type>InputSource</type>, it calls
	<member>XFastDocumentHandler::startDocument</member> first.

	<p>This parser generates either 'fast' events that use integer token
	values for namespaces, elements and attributes or 'unknown' events for
	elements that are unknown.

	<p>A namespace is unknown if the namespace URL was not registered with
	<member>registerNamespace</member>.

	<p>An element is unknown if no <type>XFastTokenHandler</type> is set
	or if the <type>XFastTokenHandler</type> does not return a valid
	identifier for the elements local name. An element is also unknown if
	the elements local name is known but it uses a namespace that is unknown.

	<p>Setting a <type>XFastTokenHandler</type> with <member>setTokenHandler</member>
	is optional, but without a <type>XFastTokenHandler</type> you will only
	get unknown sax events. This can be usefull if you are only interested
	in the namespace handling and/or the context feature.

	<p>For each element the parser sends a create child element event to the
	elements parent context by calling 
	<member>XFastContextHandler::createFastChildContext</member> for known
	elements or <member>XFastContextHandler::createUnknownChildContext</member>
	for unknown elements.
	<br>The parent context for the root element is the <type>XFastDocumentHandler</type>
	itself.
	
	<p>If the parent context returns an empty reference, no further events for
	the element and all of its childs are created.

	<p>If a valid context is returned this context gets a start event by a call to
	<member>XFastContextHandler::startFastElement</member> for known elements or
	<member>XFastContextHandler::startUnknownElement</member> for unknown elements.

	<p>After processing all its child elements the context gets an end event by a call to
	<member>XFastContextHandler::endFastElement</member> for known elements or
	<member>XFastContextHandler::endUnknownElement</member> for unknown elements.

	<p>It is valid to return one instance of <type>XFastContextHandler</type> more
	than once. It is even possible to only use the <type>XFastDocumentHandler</type>
	by always returning a reference to itself for each create child context event.

	<p>After the last element is processed the parser generates an end document
	event at the <type>XFastDocumentHandler</type> by calling
	<member>XFastDocumentHandler::endDocument</member>.

	@see http://wiki.services.openoffice.org/wiki/FastParser
*/
interface XFastParser: com::sun::star::uno::XInterface
{ 
	/** parses an XML document from a stream. 
		
		<p>Set the desired handlers before calling this method.</p>
	 */
	void parseStream( [in] InputSource aInputSource ) 
			raises( SAXException, com::sun::star::io::IOException ); 
 
	/** Application must register a document event handler to get
		sax events for the parsed stream.
	 */
	void setFastDocumentHandler( [in] XFastDocumentHandler Handler ); 

	/** must be registered to translate known xml names to integer tokens.
	 */
	void setTokenHandler( [in] XFastTokenHandler Handler ); 

	/** registers a known namespace url with the given integer token.<br>
		@param NamespaceToken
			an integer token that must be greater than FastToken::NAMESPACE.
	 */
	void registerNamespace( [in] string NamespaceURL, [in] long NamespaceToken )
		raises( com::sun::star::lang::IllegalArgumentException ); 

	/** allows an application to register an error event handler. 
		
		<p>Note that the error handler can throw an exception when an error or 
		warning occurs.  Note that an exception is thrown by the parser when 
		an unrecoverable (fatal) error occurs.</p>
	 */
	void setErrorHandler( [in] XErrorHandler Handler ); 
 
	/** allows an application to register a DTD-Handler.
	 */
	void setEntityResolver( [in] XEntityResolver Resolver ); 
 
	/** sets a locale specified for localization of warnings and error messages.
		
		<p>Set the language of the error messages. Useful when the parsing 
		errors will be presented to the user.</p>
	 */
	void setLocale( [in] com::sun::star::lang::Locale locale ); 
}; 
 
}; }; }; }; };