C++ XObjectPtr::null方法代码示例

XObjectPtr
FunctionFormatNumber::execute(
			XPathExecutionContext&	executionContext,
			XalanNode*				context,
			const XObjectPtr		arg1,
			const XObjectPtr		arg2,
			const XObjectPtr		arg3,
			const LocatorType*		locator) const
{
	assert(arg1.null() == false && arg2.null() == false && arg3.null() == false);
	
	const double						theNumber = arg1->num();
	const XalanDOMString&				thePattern = arg2->str();

	const XalanDOMString&				theDFSName = arg3->str();
	assert(length(theDFSName) != 0);
	
	typedef XPathExecutionContext::GetAndReleaseCachedString	GetAndReleaseCachedString;

	GetAndReleaseCachedString	theString(executionContext);

	executionContext.formatNumber(
		theNumber, 
		thePattern,
		theDFSName,
		theString.get(),
		context, 
		locator);

	return executionContext.getXObjectFactory().createString(theString);
}

XObjectPtr
FunctionSubstringBefore::execute(
			XPathExecutionContext&	executionContext,
			XalanNode*				/* context */,
			const XObjectPtr		arg1,
			const XObjectPtr		arg2,
			const LocatorType*		/* locator */) const
{
	assert(arg1.null() == false && arg2.null() == false);

	const XalanDOMString&				theFirstString = arg1->str();

	const XalanDOMString::size_type		theFirstStringLength = length(theFirstString);

	if (theFirstStringLength == 0)
	{
		return createEmptyString(executionContext);
	}
	else
	{
		const XalanDOMString&				theSecondString = arg2->str();

		const XalanDOMString::size_type		theSecondStringLength = length(theSecondString);

		if (theSecondStringLength == 0)
		{
			return createEmptyString(executionContext);
		}
		else
		{
			const XalanDOMString::size_type		theIndex = indexOf(theFirstString,
													   theSecondString);

			if (theIndex == theFirstStringLength)
			{
				return createEmptyString(executionContext);
			}
			else
			{
				XPathExecutionContext::GetAndReleaseCachedString	theResult(executionContext);

				XalanDOMString&		theString = theResult.get();

				theString.assign(
						toCharArray(theFirstString),
						theIndex);

				// Create a string of the appropriate length...
				return executionContext.getXObjectFactory().createString(theResult);
			}
		}
	}
}

XObjectPtr
FunctionSubstring::execute(
			XPathExecutionContext&	executionContext,
			XalanNode*				context,
			const XObjectPtr		arg1,
			const XObjectPtr		arg2,
			const LocatorType*		locator) const
{
	assert(arg1.null() == false && arg2.null() == false);

	return execute(executionContext, context, arg1, arg2, s_nullXObjectPtr, locator);
}

/*
 * Get the total of the second and third arguments.
 */
inline double
getTotal(
			XalanDOMString::size_type	theSourceStringLength,
			double						theSecondArgValue,
			const XObjectPtr&			arg3)
{
	// Total the second and third arguments.  If the third argument is
	// missing, make it the length of the string + 1 (for XPath
	// indexing style).
	if (arg3.null() == true)
	{
		return double(theSourceStringLength + 1);
	}
	else
	{
		const double	theRoundedValue =
			DoubleSupport::round(DoubleSupport::add(theSecondArgValue, arg3->num()));

		// If there's overflow, then we should return the length of the string + 1.
		if (DoubleSupport::isPositiveInfinity(theRoundedValue) == true)
		{
			return double(theSourceStringLength + 1);
		}
		else
		{
			return theRoundedValue;
		}
	}
}

XObjectPtr
FunctionStartsWith::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              /* context */,
            const XObjectPtr        arg1,
            const XObjectPtr        arg2,
            const Locator* const    /* locator */) const
{
    assert(arg1.null() == false && arg2.null() == false);   

    const bool  fStartsWith =
        startsWith(
            arg1->str(executionContext), 
            arg2->str(executionContext));

    return executionContext.getXObjectFactory().createBoolean(fStartsWith);
}

XObjectPtr
FunctionLang::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              context,
            const XObjectPtr        arg1,
            const LocatorType*      /* locator */) const
{
    assert(arg1.null() == false);   

    const XalanNode*        parent = context;

    bool                    fMatch = false;

    const XalanDOMString&   lang = arg1->str();

    while(0 != parent)
    {
        if(XalanNode::ELEMENT_NODE == parent->getNodeType())
        {
            const XalanElement* const   theElementNode =
#if defined(XALAN_OLD_STYLE_CASTS)
                (const XalanElement*)parent;
#else
                static_cast<const XalanElement*>(parent);
#endif

            const XalanDOMString&       langVal =
                theElementNode->getAttributeNS(
                    DOMServices::s_XMLNamespaceURI,
                    s_attributeName);

            if(0 != length(langVal))
            {
                XPathExecutionContext::GetAndReleaseCachedString theGuard1(executionContext);
                XPathExecutionContext::GetAndReleaseCachedString theGuard2(executionContext);

                if(startsWith(toLowerCaseASCII(langVal, theGuard1.get()), toLowerCaseASCII(lang, theGuard2.get())))
                {
                    const XalanDOMString::size_type     valLen = length(lang);

                    if(length(langVal) == valLen ||
                       charAt(langVal, valLen) == XalanUnicode::charHyphenMinus)
                    {
                        fMatch = true;

                        break;
                    }
                }
            }
        }

        parent = DOMServices::getParentOfNode(*parent);
    }

    return executionContext.getXObjectFactory().createBoolean(fMatch);
}

XObjectPtr
FunctionElementAvailable::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              /* context */,          
            const XObjectPtr        arg1,
            const LocatorType*      locator) const
{
    assert(arg1.null() == false);

    return executionContext.getXObjectFactory().createBoolean(
        executionContext.elementAvailable(arg1->str(), locator));
}

XObjectPtr
FunctionSample::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              /* context */,          
            const XObjectPtr        arg1,
            const XObjectPtr        arg2,
            const Locator*          /* locator */) const
{
   assert(arg1.null() == false);
   assert(arg2.null() == false);

   XalanDOMString path;
   arg1->str(path);
   const bool bLinux = arg2->boolean();

   XalanDOMChar dchOld;
   XalanDOMChar dchNew;

   if (bLinux)
   {
      dchOld = '\\';
      dchNew = '/';
   }
   else
   {
      dchOld = '/';
      dchOld = '\\';
   }

    int len = path.length();
   for (int i=0; i<len; i++)
      if (path[i] == dchOld)
         path[i] = dchNew;

    return executionContext.getXObjectFactory().createString(path); 
}

XObjectPtr
FunctionString::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              /* context */,          
            const XObjectPtr        arg1,
            const LocatorType*      /* locator */) const
{
    assert(arg1.null() == false);   

    if (arg1->getType() == XObject::eTypeString)
    {
        // Since XObjects are reference counted, just return the
        // argument.
        return arg1;
    }
    else
    {
        return executionContext.getXObjectFactory().createStringAdapter(arg1);
    }
}

XalanNode*
FindContextNode(
            XPathProcessor&         theXPathProcessor,
            XPathEnvSupport&        theXPathEnvSupport,
            DOMSupport&             theDOMSupport,
            XPathFactory&           theXPathFactory,
            XalanDocument*          theDocument,
            const XalanDOMString&   theContextNodeMatchPattern,
            PrintWriter&            thePrintWriter,
            XPathExecutionContext&  theExecutionContext)
{
    XalanNode*      theResult = 0;

    MemoryManagerType&      theMemoryManager =
        theExecutionContext.getMemoryManager();

    XPath* const    theXPath = theXPathFactory.create();

    XPathConstructionContextDefault     theXPathConstructionContext;

    XPathGuard      theGuard(
                        theXPathFactory,
                        theXPath);

    XalanElement*               theNamespaceContext = 0;
    ElementPrefixResolverProxy  thePrefixResolver(theNamespaceContext, theXPathEnvSupport, theDOMSupport);
    NodeRefList                 theContextNodeList(theMemoryManager);

    const XObjectPtr    theXObject =
        ExecuteXPath(
            theXPathProcessor,
            theXPathConstructionContext,
            *theXPath,
            theContextNodeMatchPattern,
            theDocument,
            thePrefixResolver,
            theContextNodeList,
            theExecutionContext);

    try
    {
        assert(theXObject.null() == false);

        const NodeRefListBase&  theResultList =
                        theXObject->nodeset();

        if (theResultList.getLength() == 0)
        {
            thePrintWriter.print("FindContextNode: Unable to find context node using select \"");
            thePrintWriter.print(theContextNodeMatchPattern);
            thePrintWriter.println("\".");
            thePrintWriter.println("FindContextNode: No nodes matched the pattern.");
        }
        else if (theResultList.getLength() != 1)
        {
            thePrintWriter.print("FindContextNode: Unable to find context node using select \"");
            thePrintWriter.print(theContextNodeMatchPattern);
            thePrintWriter.println("\".");
            thePrintWriter.println("FindContextNode: More than one node matched the pattern.");
        }
        else
        {
            theResult = theResultList.item(0);
        }
    }
    catch(...)
    {
        thePrintWriter.print("FindContextNode: Error executing match pattern \"");
        thePrintWriter.print(theContextNodeMatchPattern);
        thePrintWriter.println("\".");
    }

    return theResult;
}

const XObjectPtr
VariablesStack::findXObject(
            const XalanQName&               name,
            StylesheetExecutionContext&     executionContext,
            bool                            fIsParam,
            bool                            fSearchGlobalSpace,
            bool&                           fNameFound)
{
    typedef VariableStackStackType::size_type   size_type;

    // findEntry() returns an index into the stack.  We should
    // _never_ take the address of anything in the stack, since
    // the address could change at unexpected times.
    const size_type     theEntryIndex =
        findEntry(name, fIsParam, fSearchGlobalSpace);

    if (theEntryIndex == m_stack.size())
    {
        fNameFound = false;

        return XObjectPtr();
    }
    else
    {
        assert(theEntryIndex < m_stack.size());

        fNameFound = true;

        assert(m_stack[theEntryIndex].getType() == StackEntry::eVariable ||
               m_stack[theEntryIndex].getType() == StackEntry::eParam ||
               m_stack[theEntryIndex].getType() == StackEntry::eActiveParam);

        const XObjectPtr&   theValue = m_stack[theEntryIndex].getValue();

        if (theValue.null() == false)
        {
            return theValue;
        }
        else
        {
            const ElemVariable* const   var = m_stack[theEntryIndex].getVariable();

            XObjectPtr                  theNewValue;

            if (var != 0)
            {
                XalanNode* const    doc = executionContext.getRootDocument();
                assert(doc != 0);

                XALAN_USING_STD(find)

                // See if the ElemVariable instance is already being evaluated...
                if (find(m_guardStack.begin(), m_guardStack.end(), var) != m_guardStack.end())
                {
                    const StylesheetExecutionContext::GetCachedString   theGuard(executionContext);

                    executionContext.error(
                        XalanMessageLoader::getMessage(
                            theGuard.get(),
                            XalanMessages::CircularVariableDefWasDetected),
                        doc,
                        var->getLocator());
                }

                m_guardStack.push_back(var);

#if !defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
                executionContext.pushContextMarker();
#else
                // We need to set up a stack frame for the variable's execution...
                typedef StylesheetExecutionContext::PushAndPopContextMarker PushAndPopContextMarker;

                const PushAndPopContextMarker   theContextMarkerPushPop(executionContext);
#endif

                theNewValue = var->getValue(executionContext, doc);
                assert(theNewValue.null() == false);

#if !defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
                executionContext.popContextMarker();
#endif

                assert(m_guardStack.empty() == false);

                m_guardStack.pop_back();

                m_stack[theEntryIndex].setValue(theNewValue);
                m_stack[theEntryIndex].activate();
            }

            return theNewValue;
        }
    }

//.........这里部分代码省略.........

                bool    fDump = false;

                if (fDump == true)
                {
                    thePrintWriter.println();
                    thePrintWriter.println();
                    theXPath1->getExpression().dumpOpCodeMap(thePrintWriter);
                    thePrintWriter.println();
                    theXPath1->getExpression().dumpTokenQueue(thePrintWriter);
                    thePrintWriter.println();
                    thePrintWriter.println();
                    theXPath2->getExpression().dumpOpCodeMap(thePrintWriter);
                    thePrintWriter.println();
                    theXPath2->getExpression().dumpTokenQueue(thePrintWriter);
                    thePrintWriter.println();
                    thePrintWriter.println();
                }

                XalanNode*  theContextNode = theXMLDocument->getFirstChild()->getFirstChild();

                for( ; theContextNode != 0; theContextNode = theContextNode->getNextSibling())
                {
                    if (theContextNode->getNodeType() != XalanNode::ELEMENT_NODE)
                    {
                        continue;
                    }

                    const XObjectPtr theResult1 =
                            theXPath1->execute(theExecutionContext);

                    try
                    {
                        assert(theResult1.null() == false);

                        const NodeRefListBase&  theResultList =
                                theResult1->nodeset();

                        const unsigned int  theLength = theResultList.getLength();

                        thePrintWriter.print("theResult1->str() == \"");
                        thePrintWriter.print(theResult1->str());
                        thePrintWriter.print("\"");
                        thePrintWriter.println();

                        if (theLength > 0)
                        {
                            for (unsigned int i = 0; i < theLength; i++)
                            {
                                thePrintWriter.print(theResultList.item(i)->getNodeName());
                                thePrintWriter.println();
                            }
                        }
                    }
                    catch(...)
                    {
                        thePrintWriter.print("Execution of XPath ");
                        thePrintWriter.print(theXPathString);
                        thePrintWriter.println(" failed!");
                    }

                    const XObjectPtr    theResult2 =
                            theXPath2->execute(theExecutionContext);

                    try
                    {

bool
TestAxisResult(
            XPathProcessor&         theXPathProcessor,
            XPathEnvSupport&        theXPathEnvSupport,
            DOMSupport&             theDOMSupport,
            XMLParserLiaison&       theLiaison,
            XPathFactory&           theXPathFactory,
            const XalanDOMString&   theXMLFileURL,
            const XalanDOMString&   theXSLFileURL,
            PrintWriter&            thePrintWriter,
            XPathExecutionContext&  theExecutionContext)
{
    bool                    fError = false;

    XalanDocument* const    theXMLDocument = ParseXML(theLiaison,
                                                      theXMLFileURL);

    MemoryManagerType&      theMemoryManager =
        theExecutionContext.getMemoryManager();

    if (theXMLDocument != 0)
    {
        XalanDOMString      theContextNodeMatchPattern(theMemoryManager);
        XalanDOMString      theXPathString(theMemoryManager);

        if (GetXSLInput(theLiaison,
                        theXSLFileURL,
                        theContextNodeMatchPattern,
                        theXPathString,
                        theMemoryManager) == true)
        {
            XalanNode* const    theContextNode =
                FindContextNode(theXPathProcessor,
                                theXPathEnvSupport,
                                theDOMSupport,
                                theXPathFactory,
                                theXMLDocument,
                                theContextNodeMatchPattern,
                                thePrintWriter,
                                theExecutionContext);

            if (theContextNode != 0)
            {
                XalanElement* const             theNamespaceContext = 0;
                ElementPrefixResolverProxy      thePrefixResolver(theNamespaceContext, theXPathEnvSupport, theDOMSupport);
                NodeRefList                     theContextNodeList(theMemoryManager);

                XPath* const    theXPath = theXPathFactory.create();

                XPathConstructionContextDefault     theXPathConstructionContext(theMemoryManager);

                XPathGuard      theGuard(theXPathFactory,
                                         theXPath);

                theXPathProcessor.initXPath(*theXPath,
                                            theXPathConstructionContext,
                                            theXPathString,
                                            thePrefixResolver);

                bool    fDump = false;

                if (fDump == true)
                {
                    thePrintWriter.println();
                    thePrintWriter.println();
                    theXPath->getExpression().dumpOpCodeMap(thePrintWriter);
                    thePrintWriter.println();
                    theXPath->getExpression().dumpTokenQueue(thePrintWriter);
                    thePrintWriter.println();
                    thePrintWriter.println();
                }

                const XObjectPtr theResult =
                    theXPath->execute(theContextNode, thePrefixResolver, theContextNodeList, theExecutionContext);

                try
                {
                    assert(theResult.null() == false);

                    const NodeRefListBase&  theResultList =
                        theResult->nodeset();

                    const unsigned int  theLength = theResultList.getLength();

                    if (theLength == 0)
                    {
                        thePrintWriter.println("<out/>");
                    }
                    else
                    {
                        thePrintWriter.print("<out>");

                        for (unsigned int i = 0; i < theLength; i++)
                        {
                            thePrintWriter.print(theResultList.item(i)->getNodeName());
                            thePrintWriter.print(" ");
                        }

                        thePrintWriter.println("</out>");
                    }
//.........这里部分代码省略.........

XObjectPtr
FunctionSubstringAfter::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              /* context */,
            const XObjectPtr        arg1,
            const XObjectPtr        arg2,
            const LocatorType*      /* locator */) const
{
    assert(arg1.null() == false && arg2.null() == false);

    const XalanDOMString&               theFirstString = arg1->str();

    const XalanDOMString::size_type     theFirstStringLength = length(theFirstString);

    if (theFirstStringLength == 0)
    {
        return createEmptyString(executionContext);
    }
    else
    {
        const XalanDOMString&   theSecondString = arg2->str();

        const XalanDOMString::size_type     theSecondStringLength = length(theSecondString);

        if (theSecondStringLength == 0)
        {
            return arg1;
        }
        else
        {
            const XalanDOMString::size_type     theIndex = indexOf(theFirstString,
                                                       theSecondString);

            if (theIndex == theFirstStringLength)
            {
                return createEmptyString(executionContext);
            }
            else
            {
                const XalanDOMString::size_type     theSecondStringLength = length(theSecondString);

                // Find the first character, which will be the offset of the index of the
                // beginning of the second string, plus the length of the second string.
                const XalanDOMChar* const   theFirstCharacter =
                    toCharArray(theFirstString) + theIndex + theSecondStringLength;

                // The remaining length is just the opposite -- the length of the string,
                // minus the index, minus the length of the second string.
                const XalanDOMString::size_type     theSubstringLength =
                    theFirstStringLength  - theIndex - theSecondStringLength;

                XPathExecutionContext::GetAndReleaseCachedString    theResult(executionContext);

                XalanDOMString&     theString = theResult.get();

                assign(
                        theString,
                        theFirstCharacter,
                        theSubstringLength);

                return executionContext.getXObjectFactory().createString(theResult);
            }
        }
    }
}