//
// DOMBuilder.h
//
// $Id: //poco/Main/XML/include/DOM/DOMBuilder.h#5 $
//
// Definition of the DOMBuilder class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef DOM_DOMBuilder_INCLUDED
#define DOM_DOMBuilder_INCLUDED


#ifndef XML_XML_INCLUDED
#include "XML/XML.h"
#endif
#ifndef SAX_ContentHandler_INCLUDED
#include "SAX/ContentHandler.h"
#endif
#ifndef SAX_LexicalHandler_INCLUDED
#include "SAX/LexicalHandler.h"
#endif
#ifndef SAX_DTDHandler_INCLUDED
#include "SAX/DTDHandler.h"
#endif
#ifndef XML_XMLString_INCLUDED
#include "XML/XMLString.h"
#endif


XML_BEGIN


class XMLReader;
class Document;
class InputSource;
class AbstractNode;
class AbstractContainerNode;
class NamePool;


class XML_API DOMBuilder: protected DTDHandler, protected ContentHandler, protected LexicalHandler
	/// This class builds a tree representation of an
	/// XML document, according to the W3C Document Object Model, Level 1 and 2
	/// specifications.
	///
	/// The actual XML parsing is done by an XMLReader, which
	/// must be supplied to the DOMBuilder.
{
public:
	DOMBuilder(XMLReader& xmlReader, NamePool* pNamePool = 0);
		/// Creates a DOMBuilder using the given XMLReader. 
		/// If a NamePool is given, it becomes the Document's NamePool.

	virtual ~DOMBuilder();
		/// Destroys the DOMBuilder.

	virtual Document* parse(const XMLString& uri);
		/// Parse an XML document from a location identified by an URI.

	virtual Document* parse(InputSource* pInputSource);
		/// Parse an XML document from a location identified by an InputSource.

protected:
	// DTDHandler
	void notationDecl(const XMLString& name, const XMLString* publicId, const XMLString* systemId);
	void unparsedEntityDecl(const XMLString& name, const XMLString* publicId, const XMLString& systemId, const XMLString& notationName);

	// ContentHandler
	void setDocumentLocator(const Locator* loc);
	void startDocument();
	void endDocument();
	void startElement(const XMLString& uri, const XMLString& localName, const XMLString& qname, const Attributes& attributes);
	void endElement(const XMLString& uri, const XMLString& localName, const XMLString& qname);
	void characters(const XMLChar ch[], int start, int length);
	void ignorableWhitespace(const XMLChar ch[], int start, int length);
	void processingInstruction(const XMLString& target, const XMLString& data);
	void startPrefixMapping(const XMLString& prefix, const XMLString& uri);
	void endPrefixMapping(const XMLString& prefix);
	void skippedEntity(const XMLString& name);

	// LexicalHandler
	void startDTD(const XMLString& name, const XMLString& publicId, const XMLString& systemId);
	void endDTD();
	void startEntity(const XMLString& name);
	void endEntity(const XMLString& name);
	void startCDATA();
	void endCDATA();
	void comment(const XMLChar ch[], int start, int length); 

	void appendNode(AbstractNode* pNode);
	
	void setupParse();

private:
	static const XMLString EMPTY_STRING;

	XMLReader&             _xmlReader;
	NamePool*              _pNamePool;
	Document*              _pDocument;
	AbstractContainerNode* _pParent;
	AbstractNode*          _pPrevious;
	bool                   _inCDATA;
	bool                   _namespaces;
};


XML_END


#endif // DOM_DOMBuilder_INCLUDED