sgxmlscanner.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 1,881 行 · 第 1/5 页

        }
    }

    //  Validate the element
    if (fValidate)
    {
        fValidator->validateElement(elemDecl);
        if (((SchemaValidator*) fValidator)->getErrorOccurred())
            fPSVIElemContext.fErrorOccurred = true;
    }

    // squirrel away the element's QName, so that we can do an efficient
    // end-tag match
    fElemStack.setCurrentSchemaElemName(fQNameBuf.getRawBuffer());

    ComplexTypeInfo* typeinfo = (fValidate)
        ? ((SchemaValidator*)fValidator)->getCurrentTypeInfo()
        : ((SchemaElementDecl*) elemDecl)->getComplexTypeInfo();

    if (typeinfo) {
        currentScope = typeinfo->getScopeDefined();

        // switch grammar if the typeinfo has a different grammar (happens when there is xsi:type)
        XMLCh* typeName = typeinfo->getTypeName();
        const XMLCh poundStr[] = {chPound, chNull};
        if (!XMLString::startsWith(typeName, poundStr)) {
            const int comma = XMLString::indexOf(typeName, chComma);
            if (comma > 0) {
                XMLBuffer prefixBuf(comma+1, fMemoryManager);
                prefixBuf.append(typeName, comma);
                const XMLCh* uriStr = prefixBuf.getRawBuffer();

                bool errorCondition = !switchGrammar(uriStr) && fValidate;
                if (errorCondition && !laxThisOne)
                {
                    fValidator->emitError
                    (
                        XMLValid::GrammarNotFound
                        , prefixBuf.getRawBuffer()
                    );
                }
            }
        }
    }
    fElemStack.setCurrentScope(currentScope);

    // Set element next state
    if (elemDepth >= fElemStateSize) {
        resizeElemState();
    }

    fElemState[elemDepth] = 0;
    fElemStack.setCurrentGrammar(fGrammar);

    //  If this is the first element and we are validating, check the root
    //  element.
    if (isRoot)
    {
        if (fValidate)
        {
            //  Some validators may also want to check the root, call the
            //  XMLValidator::checkRootElement
            if (fValidatorFromUser && !fValidator->checkRootElement(elemDecl->getId())) {
                fValidator->emitError(XMLValid::RootElemNotLikeDocType);
            }
        }
    }
    else if (parentValidation)
    {
        //  If the element stack is not empty, then add this element as a
        //  child of the previous top element. If its empty, this is the root
        //  elem and is not the child of anything.
        fElemStack.addChild(elemDecl->getElementName(), true);
    }

    // PSVI handling:  must reset this, even if no attributes...
    if(getPSVIHandler())
        fPSVIAttrList->reset();

    //  Now lets get the fAttrList filled in. This involves faulting in any
    //  defaulted and fixed attributes and normalizing the values of any that
    //  we got explicitly.
    //
    //  We update the attCount value with the total number of attributes, but
    //  it goes in with the number of values we got during the raw scan of
    //  explictly provided attrs above.
    attCount = buildAttList(*fRawAttrList, attCount, elemDecl, *fAttrList);

    if(attCount)
    {
        // clean up after ourselves:
        // clear the map used to detect duplicate attributes
        fUndeclaredAttrRegistryNS->removeAll();
    }

    // activate identity constraints
    if (toCheckIdentityConstraint()) 
    {
        fICHandler->activateIdentityConstraint
                        (
                          (SchemaElementDecl*) elemDecl
                        , (int) elemDepth
                        , uriId
                        , fPrefixBuf.getRawBuffer()
                        , *fAttrList
                        , attCount
                        );

    }

    // Since the element may have default values, call start tag now regardless if it is empty or not
    // If we have a document handler, then tell it about this start tag
    if (fDocHandler)
    {
        fDocHandler->startElement
        (
            *elemDecl
            , uriId
            , fPrefixBuf.getRawBuffer()
            , *fAttrList
            , attCount
            , false
            , isRoot
        );
    } // may be where we output something...

    // if we have a PSVIHandler, now's the time to call
    // its handleAttributesPSVI method:
    if(fPSVIHandler)
    {
        QName *eName = elemDecl->getElementName();
        fPSVIHandler->handleAttributesPSVI
        (
            eName->getLocalPart()
            , fURIStringPool->getValueForId(eName->getURI())
            , fPSVIAttrList
        );
    }

    //  If empty, validate content right now if we are validating and then
    //  pop the element stack top. Else, we have to update the current stack
    //  top's namespace mapping elements.
    if (isEmpty)
    {
        // Pop the element stack back off since it'll never be used now
        fElemStack.popTop();

        // reset current type info
        DatatypeValidator* psviMemberType = 0;
        if (fGrammarType == Grammar::SchemaGrammarType)
        {
            if (fValidate && elemDecl->isDeclared())
            {
                fPSVIElemContext.fCurrentTypeInfo = ((SchemaValidator*) fValidator)->getCurrentTypeInfo();
                if(!fPSVIElemContext.fCurrentTypeInfo)
                    fPSVIElemContext.fCurrentDV = ((SchemaValidator*) fValidator)->getCurrentDatatypeValidator();
                else
                    fPSVIElemContext.fCurrentDV = 0;
                if(fPSVIHandler)
                {
                    fPSVIElemContext.fNormalizedValue = ((SchemaValidator*) fValidator)->getNormalizedValue();

                    if (XMLString::equals(fPSVIElemContext.fNormalizedValue, XMLUni::fgZeroLenString))
                        fPSVIElemContext.fNormalizedValue = 0;
                }
            }
            else
            {
                fPSVIElemContext.fCurrentDV = 0;
                fPSVIElemContext.fCurrentTypeInfo = 0;
                fPSVIElemContext.fNormalizedValue = 0;
            }
        }

        // If validating, then insure that its legal to have no content
        if (fValidate)
        {
            const int res = fValidator->checkContent(elemDecl, 0, 0);
            if (res >= 0)
            {
                // REVISIT:  in the case of xsi:type, this may
                // return the wrong string...
                fValidator->emitError
                (
                    XMLValid::ElementNotValidForContent
                    , elemDecl->getFullName()
                    , elemDecl->getFormattedContentModel()
                );
            }

            if (((SchemaValidator*) fValidator)->getErrorOccurred())
                fPSVIElemContext.fErrorOccurred = true;
            // note that if we're empty, won't be a current DV
            else 
            {
                if (fPSVIHandler)
                {
                    fPSVIElemContext.fIsSpecified = ((SchemaValidator*) fValidator)->getIsElemSpecified();
                    if(fPSVIElemContext.fIsSpecified)
                        fPSVIElemContext.fNormalizedValue = ((SchemaElementDecl *)elemDecl)->getDefaultValue();
                }
                if (fPSVIElemContext.fCurrentDV && fPSVIElemContext.fCurrentDV->getType() == DatatypeValidator::Union)
                    psviMemberType = fValidationContext->getValidatingMemberType(); 
            }

            // call matchers and de-activate context
            if (toCheckIdentityConstraint())
            {
                fICHandler->deactivateContext
                       (
                        (SchemaElementDecl *) elemDecl
                      , fContent.getRawBuffer()
                       );                
            }

        }

        if (fPSVIHandler)
        {
            endElementPSVI
            (
                (SchemaElementDecl*)elemDecl, psviMemberType
            );
        }

        // If we have a doc handler, tell it about the end tag
        if (fDocHandler)
        {
            fDocHandler->endElement
            (
                *elemDecl
                , uriId
                , isRoot
                , fPrefixBuf.getRawBuffer()
            );
        }

        // If the elem stack is empty, then it was an empty root
        if (isRoot)
            gotData = false;
        else
        {
            // Restore the grammar
            fGrammar = fElemStack.getCurrentGrammar();
            fGrammarType = fGrammar->getGrammarType();
            fValidator->setGrammar(fGrammar);

            // Restore the validation flag
            fValidate = fElemStack.getValidationFlag();
        }
    }
    else    // not empty
    {

        // send a partial element psvi
        if (fPSVIHandler)
        {

            ComplexTypeInfo*   curTypeInfo = 0;
            DatatypeValidator* curDV = 0;
            XSTypeDefinition*  typeDef = 0;
        
            if (fValidate && elemDecl->isDeclared())
            {
                curTypeInfo = ((SchemaValidator*) fValidator)->getCurrentTypeInfo();
                    
                if (curTypeInfo)
                {
                    typeDef = (XSTypeDefinition*) fModel->getXSObject(curTypeInfo);       
                }
                else
                {
                    curDV = ((SchemaValidator*) fValidator)->getCurrentDatatypeValidator();

                    if (curDV)
                    {
                        typeDef = (XSTypeDefinition*) fModel->getXSObject(curDV);
                    }
                }
            }
                       
            fPSVIElement->reset
                (
                  PSVIElement::VALIDITY_NOTKNOWN 
                , PSVIElement::VALIDATION_NONE   
                , fRootElemName                  
                , ((SchemaValidator*) fValidator)->getIsElemSpecified() 
                , (elemDecl->isDeclared()) ? (XSElementDeclaration*) fModel->getXSObject(elemDecl) : 0
                , typeDef 
                , 0 //memberType
                , fModel 
                , ((SchemaElementDecl*)elemDecl)->getDefaultValue()  
                , 0                                                  
                , 0                                                  
                , 0                                                  
                );


            fPSVIHandler->handlePartialElementPSVI
                (
                  elemDecl->getBaseName()
                , fURIStringPool->getValueForId(elemDecl->getURI())
                , fPSVIElement
                );

        }

        fErrorStack->push(fPSVIElemContext.fErrorOccurred);
    }

    return true;
}


unsigned int
SGXMLScanner::resolveQName(const   XMLCh* const qName
                           ,       XMLBuffer&   prefixBuf
                           , const short        mode
                           ,       int&         prefixColonPos)
{
    //  Lets split out the qName into a URI and name buffer first. The URI
    //  can be empty.
    prefixColonPos = XMLString::indexOf(qName, chColon);
    if (prefixColonPos == -1)
    {
        //  Its all name with no prefix, so put the whole thing into the name
        //  buffer. Then map the empty string to a URI, since the empty string
        //  represents the default namespace. This will either return some
        //  explicit URI which the default namespace is mapped to, or the
        //  the default global namespace.
        bool unknown = false;

        prefixBuf.reset();
        return fElemStack.mapPrefixToURI(XMLUni::fgZeroLenString, (ElemStack::MapModes) mode, unknown);
    }
    else
    {
        //  Copy the chars up to but not including the colon into the prefix
        //  buffer.
        prefixBuf.set(qName, prefixColonPos);

        //  Watch for the special namespace prefixes. We always map these to
        //  special URIs. 'xml' gets mapped to the official URI that its defined
        //  to map to by the NS spec. xmlns gets mapped to a special place holder
        //  URI that we define (so that it maps to something checkable.)
        const XMLCh* prefixRawBuf = prefixBuf.getRawBuffer();
        if (XMLString::equals(prefixRawBuf, XMLUni::fgXMLNSString)) {

            // if this is an element, it is an error to have xmlns as prefix
            if (mode == ElemStack::Mode_Element)
                emitError(XMLErrs::NoXMLNSAsElementPrefix, qName);

            return fXMLNSNamespaceId;
        }
        else if (XMLString::equals(prefixRawBuf, XMLUni::fgXMLString)) {
            return  fXMLNamespaceId;
        }
        else
        {
            bool unknown = false;
            unsigned int uriId = fElemStack.mapPrefixToURI(prefixRawBuf, (ElemStack::MapModes) mode, unknown);

            if (unknown)
                emitError(XMLErrs::UnknownPrefix, prefixRawBuf);

            return uriId;
        }
    }
}

// ---------------------------------------------------------------------------
//  SGXMLScanner: Grammar preparsing
// -------------