domparser.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 1,464 行 · 第 1/3 页

}



// ---------------------------------------------------------------------------
//  DOMParser: Progressive parse methods
// ---------------------------------------------------------------------------
bool DOMParser::parseFirst( const   XMLCh* const    systemId
                           ,       XMLPScanToken&  toFill)
{
    //
    //  Avoid multiple entrance. We cannot enter here while a regular parse
    //  is in progress.
    //
    if (fParseInProgress)
        ThrowXMLwithMemMgr(IOException, XMLExcepts::Gen_ParseInProgress, fMemoryManager);

    return fScanner->scanFirst(systemId, toFill);
}

bool DOMParser::parseFirst( const   char* const         systemId
                           ,       XMLPScanToken&      toFill)
{
    //
    //  Avoid multiple entrance. We cannot enter here while a regular parse
    //  is in progress.
    //
    if (fParseInProgress)
        ThrowXMLwithMemMgr(IOException, XMLExcepts::Gen_ParseInProgress, fMemoryManager);

    return fScanner->scanFirst(systemId, toFill);
}

bool DOMParser::parseFirst( const   InputSource&    source
                           ,       XMLPScanToken&  toFill)
{
    //
    //  Avoid multiple entrance. We cannot enter here while a regular parse
    //  is in progress.
    //
    if (fParseInProgress)
        ThrowXMLwithMemMgr(IOException, XMLExcepts::Gen_ParseInProgress, fMemoryManager);

    return fScanner->scanFirst(source, toFill);
}

bool DOMParser::parseNext(XMLPScanToken& token)
{
    return fScanner->scanNext(token);
}

void DOMParser::parseReset(XMLPScanToken& token)
{
    // Reset the scanner, and then reset the parser
    fScanner->scanReset(token);
    reset();
}


// ---------------------------------------------------------------------------
//  DOMParser: Implementation of the XMLErrorReporter interface
// ---------------------------------------------------------------------------
void DOMParser::error(  const   unsigned int                code
                      , const XMLCh* const                msgDomain
                      , const XMLErrorReporter::ErrTypes  errType
                      , const XMLCh* const                errorText
                      , const XMLCh* const                systemId
                      , const XMLCh* const                publicId
                      , const XMLSSize_t                  lineNum
                      , const XMLSSize_t                  colNum)
{
    SAXParseException toThrow = SAXParseException
        (
        errorText
        , publicId
        , systemId
        , lineNum
        , colNum
        , fMemoryManager
        );

    //
    //  If there is an error handler registered, call it, otherwise ignore
    //  all but the fatal errors.
    //
    if (!fErrorHandler)
    {
        if (errType == XMLErrorReporter::ErrType_Fatal)
            throw toThrow;
        return;
    }

    if (errType == XMLErrorReporter::ErrType_Warning)
        fErrorHandler->warning(toThrow);
    else if (errType >= XMLErrorReporter::ErrType_Fatal)
        fErrorHandler->fatalError(toThrow);
    else
        fErrorHandler->error(toThrow);
}

void DOMParser::resetErrors()
{
}


// ---------------------------------------------------------------------------
//  DOMParser: Implementation of XMLEntityHandler interface
// ---------------------------------------------------------------------------
InputSource*
DOMParser::resolveEntity(const XMLCh* const publicId,
                         const XMLCh* const systemId,
                         const XMLCh* const baseURI)
{
    //
    //  Just map it to the SAX entity resolver. If there is not one installed,
    //  return a null pointer to cause the default resolution.
    //
    if (fEntityResolver)
        return fEntityResolver->resolveEntity(publicId, systemId);
    return 0;
}

InputSource* DOMParser::resolveEntity(XMLResourceIdentifier* resourceIdentifier) 
{
    //
    //  Just map it to the SAX entity resolver. If there is not one installed,
    //  return a null pointer to cause the default resolution.
    //
    if (fEntityResolver)
        return fEntityResolver->resolveEntity(resourceIdentifier->getPublicId(), 
                                                resourceIdentifier->getSystemId());
    if (fXMLEntityResolver)
        return fXMLEntityResolver->resolveEntity(resourceIdentifier);
    return 0;
}

// ---------------------------------------------------------------------------
//  DOMParser: Implementation of XMLDocumentHandler interface
// ---------------------------------------------------------------------------
void DOMParser::docCharacters(  const   XMLCh* const    chars
                              , const unsigned int    length
                              , const bool            cdataSection)
{
    // Ignore chars outside of content
    if (!fWithinElement)
        return;

    if (cdataSection == true)
    {
        DOM_CDATASection node = fDocument.createCDATASection
            (
            DOMString(chars, length)
            );
        fCurrentParent.appendChild(node);
        fCurrentNode = node;
    }
    else
    {
        if (fCurrentNode.getNodeType() == DOM_Node::TEXT_NODE)
        {
            DOM_Text node = (DOM_Text&)fCurrentNode;
            node.appendData(DOMString(chars, length));
        }
        else
        {
            DOM_Text node = fDocument.createTextNode(DOMString(chars, length));
            fCurrentParent.appendChild(node);

            fCurrentNode = node;

        }
    }
}


void DOMParser::docComment(const XMLCh* const comment)
{
    DOM_Comment dcom = fDocument.createComment(comment);
    fCurrentParent.appendChild(dcom);
    fCurrentNode = dcom;
}


void DOMParser::docPI(  const   XMLCh* const    target
                      , const XMLCh* const    data)
{
    DOM_ProcessingInstruction pi = fDocument.createProcessingInstruction
        (
        target
        , data
        );
    fCurrentParent.appendChild(pi);
    fCurrentNode = pi;
}


void DOMParser::endEntityReference(const XMLEntityDecl& entDecl)
{
    if (fCreateEntityReferenceNodes == true)
    {
        if (fCurrentParent.getNodeType() == DOM_Node::ENTITY_REFERENCE_NODE) {
            ((DOM_EntityReference&)fCurrentParent).fImpl->setReadOnly(true, true);
        }
        fCurrentParent = fNodeStack->pop();
        fCurrentNode   = fCurrentParent;
    }
}


void DOMParser::endElement( const   XMLElementDecl&    elemDecl
                           , const unsigned int        urlId
                           , const bool                isRoot
                           , const XMLCh* const        elemPrefix)
{
    fCurrentNode   = fCurrentParent;
    fCurrentParent = fNodeStack->pop();

    // If we've hit the end of content, clear the flag
    if (fNodeStack->empty())
        fWithinElement = false;
}


void DOMParser::ignorableWhitespace(const   XMLCh* const    chars
                                    , const unsigned int    length
                                    , const bool            cdataSection)
{
    // Ignore chars before the root element
    if (!fWithinElement || !fIncludeIgnorableWhitespace)
        return;

    if (fCurrentNode.getNodeType() == DOM_Node::TEXT_NODE)
    {
        DOM_Text node = (DOM_Text&)fCurrentNode;
        node.appendData(DOMString(chars, length));
    }
    else
    {
        DOM_Text node = fDocument.createTextNode(DOMString(chars, length));
        TextImpl *text = (TextImpl *) node.fImpl;
        text -> setIgnorableWhitespace(true);
        fCurrentParent.appendChild(node);

        fCurrentNode = node;
    }
}


void DOMParser::resetDocument()
{
    //
    //  The reset methods are called before a new parse event occurs.
    //  Reset this parsers state to clear out anything that may be left
    //  from a previous use, in particular the DOM document itself.
    //
    this->reset();
}


void DOMParser::startDocument()
{
    // Just set the document as the current parent and current node
    fCurrentParent = fDocument;
    fCurrentNode   = fDocument;
    // set DOM error checking off
    fDocument.setErrorChecking(false);
}


void DOMParser::endDocument()
{
    // set DOM error checking back on
    fDocument.setErrorChecking(true);
}


void DOMParser::startElement(const  XMLElementDecl&         elemDecl
                             , const unsigned int            urlId
                             , const XMLCh* const            elemPrefix
                             , const RefVectorOf<XMLAttr>&   attrList
                             , const unsigned int            attrCount
                             , const bool                    isEmpty
                             , const bool                    isRoot)
{
    DOM_Element     elem;
    DocumentImpl    *docImpl = (DocumentImpl *)fDocument.fImpl;

    if (fScanner -> getDoNamespaces()) {    //DOM Level 2, doNamespaces on
        XMLBuffer buf(1023, fMemoryManager);
        DOMString namespaceURI = 0;
        DOMString elemQName = 0;
        if (urlId != fScanner->getEmptyNamespaceId()) {  //TagName has a prefix
            fScanner->getURIText(urlId, buf);   //get namespaceURI
            namespaceURI = DOMString(buf.getRawBuffer());

            if (elemPrefix && *elemPrefix) {
                elemQName.appendData(elemPrefix);
                elemQName.appendData(chColon);
            }
        }
        elemQName.appendData(elemDecl.getBaseName());

        elem = fDocument.createElementNS(namespaceURI, elemQName);
        ElementImpl *elemImpl = (ElementImpl *) elem.fImpl;
        for (unsigned int index = 0; index < attrCount; ++index) {
            static const XMLCh XMLNS[] = {
            chLatin_x, chLatin_m, chLatin_l, chLatin_n, chLatin_s, chNull
            };
            const XMLAttr* oneAttrib = attrList.elementAt(index);
            unsigned int attrURIId = oneAttrib -> getURIId();
            namespaceURI = 0;
            if (!XMLString::compareString(oneAttrib -> getName(), XMLNS))    //for xmlns=...
                attrURIId = fScanner->getXMLNSNamespaceId();
            if (attrURIId != fScanner->getEmptyNamespaceId()) {  //TagName has a prefix
                fScanner->getURIText(attrURIId, buf);   //get namespaceURI
                namespaceURI = DOMString(buf.getRawBuffer());
            }
            AttrImpl *attr = elemImpl->setAttributeNS(namespaceURI, oneAttrib -> getQName(),
            oneAttrib -> getValue());

            // Attributes of type ID.  If this is one, add it to the hashtable of IDs
            //   that is constructed for use by GetElementByID().
            //
            if (oneAttrib->getType()==XMLAttDef::ID)
            {
                if (docImpl->fNodeIDMap == 0)
                    docImpl->fNodeIDMap = new (fMemoryManager) NodeIDMap(500, fMemoryManager);
                docImpl->fNodeIDMap->add(attr);
                attr->isIdAttr(true);
            }

            attr->setSpecified(oneAttrib->getSpecified());
        }
    }
    else {    //DOM Level 1
        elem = fDocument.createElement(elemDecl.getFullName());
        ElementImpl *elemImpl = (ElementImpl *) elem.fImpl;
        for (unsigned int index = 0; index < attrCount; ++index) {
            const XMLAttr* oneAttrib = attrList.elementAt(index);
            AttrImpl *attr = elemImpl->setAttribute(oneAttrib->getName(), oneAttrib->getValue());
            attr->setSpecified(oneAttrib->getSpecified());

            // Attributes of type ID.  If this is one, add it to the hashtable of IDs
            //   that is constructed for use by GetElementByID().
            //
            if (oneAttrib->getType()==XMLAttDef::ID)
            {
                if (docImpl->fNodeIDMap == 0)
                    docImpl->fNodeIDMap = new (fMemoryManager) NodeIDMap(500, fMemoryManager);
                docImpl->fNodeIDMap->add(attr);
                attr->isIdAttr(true);
            }
        }
    }

    fCurrentParent.appendChild(elem);

    fNodeStack->push(fCurrentParent);
    fCurrentParent = elem;
    fCurrentNode = elem;
    fWithinElement = true;

    // If an empty element, do end right now (no endElement() will be called)
    if (isEmpty)
        endElement(elemDecl, urlId, isRoot, elemPrefix);
}


void DOMParser::startEntityReference(const XMLEntityDecl& entDecl)
{
    if (fCreateEntityReferenceNodes == true)
    {
		DOMString entName(entDecl.getName());
        DOM_EntityReference er = fDocument.createEntityReference(entName);

        //set the readOnly flag to false before appending node, will be reset in endEntityReference
        er.fImpl->setReadOnly(false, true);

        fCurrentParent.appendChild(er);
        fNodeStack->push(fCurrentParent);
        fCurrentParent = er;
        fCurrentNode = er;

		// this entityRef needs to be stored in Entity map too.
        // We'd decide later whether the entity nodes should be created by a
        // separated method in parser or not. For now just stick it in if
        // the ref nodes are created
		EntityImpl* entity = (EntityImpl*)fDocumentType->entities->getNamedItem(entName);
		entity->setEntityRef((EntityReferenceImpl*)er.fImpl);

    }
}


void DOMParser::XMLDecl(const   XMLCh* const version
                        , const XMLCh* const encoding
                        , const XMLCh* const standalone
                        , const XMLCh* const actualEncStr)
{
    //This is a non-standard extension to creating XMLDecl type nodes and attching to DOM Tree
    // currently this flag it set to false unless user explicitly asks for it
    // Needs to be revisited after W3C specs are laid out on this issue.

    if (fToCreateXMLDeclTypeNode) {

        DOMString ver(version);
        DOMString enc(encoding);
        DOMString isStd(standalone);
        DOM_XMLDecl xmlDecl = fDocument.createXMLDecl(ver, enc, isStd);

        fCurrentParent.appendChild(xmlDecl);
    }
}



// ---------------------------------------------------------------------------
//  DOMParser: Deprecated methods
// ---------------------------------------------------------------------------
bool DOMParser::getDoValidation() const
{
    //
    //  We don't want to tie the public parser classes to the enum used
    //  by the scanner, so we use a separate one and map.
    //
    //  DON'T mix the new and old methods!!
    //
    const XMLScanner::ValSchemes scheme = fScanner->getValidationScheme();
    if (scheme == XMLScanner::Val_Always)
        return true;
    return false;
}

void DOMParser::setDoValidation(const bool newState)
{
    fScanner->setDoValidation
    (
        newState ? XMLScanner::Val_Always : XMLScanner::Val_Never
    );
}

//doctypehandler interfaces
void DOMParser::attDef
(
    const   DTDElementDecl&     elemDecl
    , const DTDAttDef&          attDef
    , const bool                ignoring
	)
{	
    if (fDocumentType->isIntSubsetReading())
    {
        DOMString attString;
        if (elemDecl.hasAttDefs())
        {
            attString.appendData(chOpenAngle);
            attString.appendData(chBang);
            attString.appendData(XMLUni::fgAttListString);
            attString.appendData(chSpace);
            attString.appendData(elemDecl.getFullName());

            attString.appendData(chSpace);
            attString.appendData(attDef.getFullName());

            // Get the type and display it
            const XMLAttDef::AttTypes type = attDef.getType();
            switch(type)
            {
            case XMLAttDef::CData :
                attString.appendData(chSpace);
                attString.appendData(XMLUni::fgCDATAString);
                break;
            case XMLAttDef::ID :
                attString.appendData(chSpace);
                attString.appendData(XMLUni::fgIDString);
                break;
            case XMLAttDef::IDRef :
                attString.appendData(chSpace);
                attString.appendData(XMLUni::fgIDRefString);
                break;
            case XMLAttDef::IDRefs :
                attString.appendData(chSpace);
                attString.appendData(XMLUni::fgIDRefsString);
                break;
            case XMLAttDef::Entity :
                attString.appendData(chSpace);
                attString.appendData(XMLUni::fgEntityString);
                break;
            case XMLAttDef::Entities :