domserializer.cpp

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//
// DOMSerializer.cpp
//
// $Id: //poco/1.2/XML/src/DOMSerializer.cpp#1 $
//
// Library: XML
// Package: DOM
// Module:  DOMSerializer
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/DOM/DOMSerializer.h"
#include "Poco/DOM/Document.h"
#include "Poco/DOM/DocumentType.h"
#include "Poco/DOM/DocumentFragment.h"
#include "Poco/DOM/Element.h"
#include "Poco/DOM/Attr.h"
#include "Poco/DOM/Text.h"
#include "Poco/DOM/CDATASection.h"
#include "Poco/DOM/Comment.h"
#include "Poco/DOM/ProcessingInstruction.h"
#include "Poco/DOM/Entity.h"
#include "Poco/DOM/Notation.h"
#include "Poco/DOM/NamedNodeMap.h"
#include "Poco/DOM/AutoPtr.h"
#include "Poco/SAX/EntityResolver.h"
#include "Poco/SAX/DTDHandler.h"
#include "Poco/SAX/ContentHandler.h"
#include "Poco/SAX/LexicalHandler.h"
#include "Poco/SAX/AttributesImpl.h"
#include "Poco/SAX/ErrorHandler.h"
#include "Poco/SAX/SAXException.h"


namespace Poco {
namespace XML {


const XMLString DOMSerializer::CDATA = toXMLString("CDATA");


DOMSerializer::DOMSerializer():
	_pEntityResolver(0),
	_pDTDHandler(0),
	_pContentHandler(0),
	_pErrorHandler(0),
	_pDeclHandler(0),
	_pLexicalHandler(0)
{
}


DOMSerializer::~DOMSerializer()
{
}


void DOMSerializer::setEntityResolver(EntityResolver* pEntityResolver)
{
	_pEntityResolver = pEntityResolver;
}


EntityResolver* DOMSerializer::getEntityResolver() const
{
	return _pEntityResolver;
}


void DOMSerializer::setDTDHandler(DTDHandler* pDTDHandler)
{
	_pDTDHandler = pDTDHandler;
}


DTDHandler* DOMSerializer::getDTDHandler() const
{
	return _pDTDHandler;
}


void DOMSerializer::setContentHandler(ContentHandler* pContentHandler)
{
	_pContentHandler = pContentHandler;
}


ContentHandler* DOMSerializer::getContentHandler() const
{
	return _pContentHandler;
}


void DOMSerializer::setErrorHandler(ErrorHandler* pErrorHandler)
{
	_pErrorHandler = pErrorHandler;
}


ErrorHandler* DOMSerializer::getErrorHandler() const
{
	return _pErrorHandler;
}


void DOMSerializer::setFeature(const XMLString& featureId, bool state)
{
	if (featureId == XMLReader::FEATURE_NAMESPACES)
		throw SAXNotSupportedException(fromXMLString(XMLReader::FEATURE_NAMESPACES));
	else if (featureId == XMLReader::FEATURE_NAMESPACE_PREFIXES)
		throw SAXNotSupportedException(fromXMLString(XMLReader::FEATURE_NAMESPACE_PREFIXES));
	else
		throw SAXNotRecognizedException(fromXMLString(featureId));
}


bool DOMSerializer::getFeature(const XMLString& featureId) const
{
	if (featureId == XMLReader::FEATURE_NAMESPACES)
		throw SAXNotSupportedException(fromXMLString(XMLReader::FEATURE_NAMESPACES));
	else if (featureId == XMLReader::FEATURE_NAMESPACE_PREFIXES)
		throw SAXNotSupportedException(fromXMLString(XMLReader::FEATURE_NAMESPACE_PREFIXES));
	else
		throw SAXNotRecognizedException(fromXMLString(featureId));
}


void DOMSerializer::setProperty(const XMLString& propertyId, const XMLString& value)
{
	if (propertyId == XMLReader::PROPERTY_DECLARATION_HANDLER || propertyId == XMLReader::PROPERTY_LEXICAL_HANDLER)
		throw SAXNotSupportedException(std::string("property does not take a string value: ") + fromXMLString(propertyId));
	else
		throw SAXNotRecognizedException(fromXMLString(propertyId));
}


void DOMSerializer::setProperty(const XMLString& propertyId, void* value)
{
	if (propertyId == XMLReader::PROPERTY_DECLARATION_HANDLER)
		_pDeclHandler = reinterpret_cast<DeclHandler*>(value);
	else if (propertyId == XMLReader::PROPERTY_LEXICAL_HANDLER)
		_pLexicalHandler = reinterpret_cast<LexicalHandler*>(value);
	else throw SAXNotRecognizedException(fromXMLString(propertyId));
}


void* DOMSerializer::getProperty(const XMLString& propertyId) const
{
	if (propertyId == XMLReader::PROPERTY_DECLARATION_HANDLER)
		return _pDeclHandler;
	else if (propertyId == XMLReader::PROPERTY_LEXICAL_HANDLER)
		return _pLexicalHandler;
	else throw SAXNotSupportedException(fromXMLString(propertyId));
}


void DOMSerializer::serialize(const Node* pNode)
{
	poco_check_ptr (pNode);

	handleNode(pNode);
}


void DOMSerializer::parse(InputSource* pSource)
{
	throw XMLException("The DOMSerializer cannot parse an InputSource");
}


void DOMSerializer::parse(const XMLString& systemId)
{
	throw XMLException("The DOMSerializer cannot parse from a system identifier");
}


void DOMSerializer::iterate(const Node* pNode) const
{
	while (pNode)
	{
		handleNode(pNode);
		pNode = pNode->nextSibling();
	}
}


void DOMSerializer::handleNode(const Node* pNode) const
{
	switch (pNode->nodeType())
	{
	case Node::ELEMENT_NODE:
		handleElement(static_cast<const Element*>(pNode)); 
		break;
	case Node::TEXT_NODE:
		handleCharacterData(static_cast<const Text*>(pNode)); 
		break;
	case Node::CDATA_SECTION_NODE:
		handleCDATASection(static_cast<const CDATASection*>(pNode)); 
		break;
	case Node::ENTITY_NODE:
		handleEntity(static_cast<const Entity*>(pNode));
		break;
	case Node::PROCESSING_INSTRUCTION_NODE:
		handlePI(static_cast<const ProcessingInstruction*>(pNode)); 
		break;
	case Node::COMMENT_NODE:
		handleComment(static_cast<const Comment*>(pNode)); 
		break;
	case Node::DOCUMENT_NODE:
		handleDocument(static_cast<const Document*>(pNode)); 
		break;
	case Node::DOCUMENT_TYPE_NODE:
		handleDocumentType(static_cast<const DocumentType*>(pNode));
		break;
	case Node::DOCUMENT_FRAGMENT_NODE:
		handleFragment(static_cast<const DocumentFragment*>(pNode));
		break;
	case Node::NOTATION_NODE:
		handleNotation(static_cast<const Notation*>(pNode));
		break;
	}
}


void DOMSerializer::handleElement(const Element* pElement) const
{
	if (_pContentHandler) 
	{
		AutoPtr<NamedNodeMap> pAttrs = pElement->attributes();
		AttributesImpl saxAttrs;
		for (unsigned long i = 0; i < pAttrs->length(); ++i)
		{
			Attr* pAttr = static_cast<Attr*>(pAttrs->item(i));
			saxAttrs.addAttribute(pAttr->namespaceURI(), pAttr->localName(), pAttr->nodeName(), CDATA, pAttr->value(), pAttr->specified());
		}
		_pContentHandler->startElement(pElement->namespaceURI(), pElement->localName(), pElement->tagName(), saxAttrs);
	}
	iterate(pElement->firstChild());
	if (_pContentHandler)
		_pContentHandler->endElement(pElement->namespaceURI(), pElement->localName(), pElement->tagName());
}


void DOMSerializer::handleCharacterData(const Text* pText) const
{
	if (_pContentHandler)
	{
		const XMLString& data = pText->data();
		_pContentHandler->characters(data.c_str(), 0, (int) data.length());
	}
}


void DOMSerializer::handleComment(const Comment* pComment) const
{
	if (_pLexicalHandler)
	{
		const XMLString& data = pComment->data();
		_pLexicalHandler->comment(data.c_str(), 0, (int) data.length());
	}
}


void DOMSerializer::handlePI(const ProcessingInstruction* pPI) const
{
	if (_pContentHandler) _pContentHandler->processingInstruction(pPI->target(), pPI->data());
}


void DOMSerializer::handleCDATASection(const CDATASection* pCDATA) const
{
	if (_pLexicalHandler) _pLexicalHandler->startCDATA();
	handleCharacterData(pCDATA);
	if (_pLexicalHandler) _pLexicalHandler->endCDATA();
}


void DOMSerializer::handleDocument(const Document* pDocument) const
{
	if (_pContentHandler) _pContentHandler->startDocument();
	const DocumentType* pDoctype = pDocument->doctype();
	if (pDoctype) handleDocumentType(pDoctype);
	iterate(pDocument->firstChild());
	if (_pContentHandler) _pContentHandler->endDocument();
}


void DOMSerializer::handleDocumentType(const DocumentType* pDocumentType) const
{
	if (_pLexicalHandler) _pLexicalHandler->startDTD(pDocumentType->name(), pDocumentType->publicId(), pDocumentType->systemId());
	iterate(pDocumentType->firstChild());
	if (_pLexicalHandler) _pLexicalHandler->endDTD();
}


void DOMSerializer::handleFragment(const DocumentFragment* pFragment) const
{
	iterate(pFragment->firstChild());
}


void DOMSerializer::handleNotation(const Notation* pNotation) const
{
	if (_pDTDHandler) _pDTDHandler->notationDecl(pNotation->nodeName(), &pNotation->publicId(), &pNotation->systemId());
}


void DOMSerializer::handleEntity(const Entity* pEntity) const
{
	if (_pDTDHandler) _pDTDHandler->unparsedEntityDecl(pEntity->nodeName(), &pEntity->publicId(), pEntity->systemId(), pEntity->notationName());
}


} } // namespace Poco::XML