/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Class header file...
#include "XPathExecutionContextDefault.hpp"



#include <xercesc/sax/Locator.hpp>



#include <xalanc/Include/STLHelper.hpp>



#include <xalanc/PlatformSupport/PrefixResolver.hpp>
#include <xalanc/PlatformSupport/XalanLocator.hpp>
#include <xalanc/PlatformSupport/DoubleSupport.hpp>
#include <xalanc/PlatformSupport/DOMStringHelper.hpp>
#include <xalanc/PlatformSupport/XalanDecimalFormatSymbols.hpp>
#include <xalanc/PlatformSupport/XalanMessageLoader.hpp>



#include <xalanc/DOMSupport/DOMSupport.hpp>



#include "XObjectFactory.hpp"
#include "XalanQName.hpp"
#include "XPathEnvSupport.hpp"



XALAN_CPP_NAMESPACE_BEGIN



const NodeRefList   XPathExecutionContextDefault::s_dummyList(XalanMemMgrs::getDummyMemMgr());



XPathExecutionContextDefault::XPathExecutionContextDefault(
            XPathEnvSupport&        theXPathEnvSupport,
            DOMSupport&             theDOMSupport,
            XObjectFactory&         theXObjectFactory,
            XalanNode*              theCurrentNode,
            const NodeRefListBase*  theContextNodeList,
            const PrefixResolver*   thePrefixResolver) :
    XPathExecutionContext(theXObjectFactory.getMemoryManager(), &theXObjectFactory),
    m_xpathEnvSupport(&theXPathEnvSupport),
    m_domSupport(&theDOMSupport),
    m_currentNodeStack(theXObjectFactory.getMemoryManager()),
    m_contextNodeListStack(theXObjectFactory.getMemoryManager()),
    m_prefixResolver(thePrefixResolver),
    m_currentPattern(theXObjectFactory.getMemoryManager()),
    m_nodeListCache(theXObjectFactory.getMemoryManager(), eNodeListCacheListSize),
    m_stringCache(theXObjectFactory.getMemoryManager()),
    m_cachedPosition(),
    m_scratchQName(theXObjectFactory.getMemoryManager())
{
    m_currentNodeStack.push_back(theCurrentNode);

    m_contextNodeListStack.push_back(theContextNodeList == 0 ? &s_dummyList : theContextNodeList);
}



XPathExecutionContextDefault::XPathExecutionContextDefault(
            MemoryManagerType&      theManager,
            XalanNode*              theCurrentNode,
            const NodeRefListBase*  theContextNodeList,
            const PrefixResolver*   thePrefixResolver) :
    XPathExecutionContext(theManager),
    m_xpathEnvSupport(0),
    m_domSupport(0),
    m_currentNodeStack(theManager),
    m_contextNodeListStack(theManager),
    m_prefixResolver(thePrefixResolver),
    m_currentPattern(theManager),
    m_nodeListCache(theManager, eNodeListCacheListSize),
    m_stringCache(theManager),
    m_cachedPosition(),
    m_scratchQName(theManager)
{
    m_currentNodeStack.push_back(theCurrentNode);

    m_contextNodeListStack.push_back(theContextNodeList == 0 ? &s_dummyList : theContextNodeList);
}

XPathExecutionContextDefault*
XPathExecutionContextDefault::create(
                                     MemoryManagerType&      theManager,
                                     XalanNode*             theCurrentNode,
                                     const NodeRefListBase* theContextNodeList,
                                     const PrefixResolver*  thePrefixResolver)
{
    typedef XPathExecutionContextDefault ThisType;

    XalanMemMgrAutoPtr<ThisType, false> theGuard( theManager , (ThisType*)theManager.allocate(sizeof(ThisType)));

    ThisType* theResult = theGuard.get();

    new (theResult) ThisType(   theManager, 
                                theCurrentNode,
                                theContextNodeList,
                                thePrefixResolver);
    theGuard.release();

    return theResult;
}


XPathExecutionContextDefault::~XPathExecutionContextDefault()
{
    reset();
}



void
XPathExecutionContextDefault::reset()
{
    if (m_xpathEnvSupport != 0)
    {
        m_xpathEnvSupport->reset();
    }

    if (m_domSupport != 0)
    {
        m_domSupport->reset();
    }

    if (m_xobjectFactory != 0)
    {
        m_xobjectFactory->reset();
    }

    m_currentNodeStack.clear();
    m_currentNodeStack.push_back(0);

    m_contextNodeListStack.clear();
    m_contextNodeListStack.push_back(&s_dummyList);

    m_prefixResolver = 0;

    m_nodeListCache.reset(),

    m_stringCache.reset();

    m_cachedPosition.clear();
}



XalanNode*
XPathExecutionContextDefault::getCurrentNode() const
{
    assert(m_currentNodeStack.empty() == false);

    return m_currentNodeStack.back();
}



void
XPathExecutionContextDefault::pushCurrentNode(XalanNode*    theCurrentNode)
{
    m_currentNodeStack.push_back(theCurrentNode);
}



void
XPathExecutionContextDefault::popCurrentNode()
{
    assert(m_currentNodeStack.empty() == false);

    m_currentNodeStack.pop_back();
}



bool
XPathExecutionContextDefault::isNodeAfter(
            const XalanNode&    node1,
            const XalanNode&    node2) const
{
    return m_domSupport->isNodeAfter(node1, node2);
}



void    
XPathExecutionContextDefault::pushContextNodeList(const NodeRefListBase&    theList)
{
    m_cachedPosition.clear();

    m_contextNodeListStack.push_back(&theList);
}



void    
XPathExecutionContextDefault::popContextNodeList()
{
    m_cachedPosition.clear();

    m_contextNodeListStack.pop_back();
}



const NodeRefListBase&
XPathExecutionContextDefault::getContextNodeList() const
{
    assert(m_contextNodeListStack.empty() == false);

    return *m_contextNodeListStack.back();
}



XPathExecutionContextDefault::size_type
XPathExecutionContextDefault::getContextNodeListLength() const
{
    assert(m_contextNodeListStack.empty() == false);

    return m_contextNodeListStack.back()->getLength();
}



XPathExecutionContextDefault::size_type
XPathExecutionContextDefault::getContextNodeListPosition(const XalanNode&   contextNode) const
{
    assert(m_contextNodeListStack.empty() == false);

    if (m_cachedPosition.m_node == &contextNode)
    {
        assert((m_cachedPosition.m_index == 0 && m_contextNodeListStack.back()->indexOf(&contextNode) == NodeRefListBase::npos) ||
               (m_contextNodeListStack.back()->indexOf(&contextNode) + 1 == m_cachedPosition.m_index));
    }
    else
    {
        // Get the index of the node...
        const size_type     theIndex = m_contextNodeListStack.back()->indexOf(&contextNode);

        // If not found, it's 0.  Otherwise, it's the index + 1
#if defined(XALAN_NO_MUTABLE)
        ((XPathExecutionContextDefault*)this)->m_cachedPosition.m_index = theIndex == NodeRefListBase::npos ? 0 : theIndex + 1;
        ((XPathExecutionContextDefault*)this)->m_cachedPosition.m_node = &contextNode;
#else
        m_cachedPosition.m_index = theIndex == NodeRefListBase::npos ? 0 : theIndex + 1;
        m_cachedPosition.m_node = &contextNode;
#endif
    }

    return m_cachedPosition.m_index;
}



bool
XPathExecutionContextDefault::elementAvailable(const XalanQName&    theQName) const
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->elementAvailable(theQName.getNamespace(), theQName.getLocalPart());
}



bool
XPathExecutionContextDefault::elementAvailable(
            const XalanDOMString&   theName, 
            const LocatorType*      theLocator) const
{
    assert(m_xpathEnvSupport != 0);

    XalanQNameByValue&  theQName = getScratchQName();

    theQName.set(theName, m_prefixResolver, theLocator);

    return elementAvailable(m_scratchQName);
}



bool
XPathExecutionContextDefault::functionAvailable(const XalanQName&   theQName) const
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->functionAvailable(theQName.getNamespace(), theQName.getLocalPart());
}



bool
XPathExecutionContextDefault::functionAvailable(
            const XalanDOMString&   theName, 
            const LocatorType*      theLocator) const
{
    assert(m_xpathEnvSupport != 0);

    XalanQNameByValue&  theQName = getScratchQName();

    theQName.set(theName, m_prefixResolver, theLocator);

    return functionAvailable(theQName);
}



const XObjectPtr
XPathExecutionContextDefault::extFunction(
            const XalanDOMString&           theNamespace,
            const XalanDOMString&           functionName, 
            XalanNode*                      context,
            const XObjectArgVectorType&     argVec,
            const LocatorType*              locator)
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->extFunction(*this, theNamespace, functionName, context, argVec, locator);
}



XalanDocument*
XPathExecutionContextDefault::parseXML(
            MemoryManagerType&      theManager,
            const XalanDOMString&   urlString,
            const XalanDOMString&   base) const
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->parseXML(theManager, urlString, base);
}



MutableNodeRefList*
XPathExecutionContextDefault::borrowMutableNodeRefList()
{
    return m_nodeListCache.get();
}



bool
XPathExecutionContextDefault::returnMutableNodeRefList(MutableNodeRefList*  theList)
{
    return m_nodeListCache.release(theList);
}



MutableNodeRefList*
XPathExecutionContextDefault::createMutableNodeRefList(MemoryManagerType& theManager) const
{
    return MutableNodeRefList::create(theManager);
}



XalanDOMString&
XPathExecutionContextDefault::getCachedString()
{
    return m_stringCache.get();
}



bool
XPathExecutionContextDefault::releaseCachedString(XalanDOMString&   theString)
{
    return m_stringCache.release(theString);
}



void
XPathExecutionContextDefault::getNodeSetByKey(
            XalanDocument*          /* doc */,
            const XalanQName&       /* qname */,
            const XalanDOMString&   /* ref */,
            MutableNodeRefList&     /* nodelist */)
{
}



void
XPathExecutionContextDefault::getNodeSetByKey(
            XalanDocument*          /* doc */,
            const XalanDOMString&   /* name */,
            const XalanDOMString&   /* ref */,
            const LocatorType*      /* locator */,
            MutableNodeRefList&     /* nodelist */)
{
}



const XObjectPtr
XPathExecutionContextDefault::getVariable(
            const XalanQName&       name,
            const LocatorType*      /* locator */)
{
    assert(m_xobjectFactory != 0);

    return m_xobjectFactory->createUnknown(name.getLocalPart());
}



const PrefixResolver*
XPathExecutionContextDefault::getPrefixResolver() const
{
    return m_prefixResolver;
}



void
XPathExecutionContextDefault::setPrefixResolver(const PrefixResolver*   thePrefixResolver)
{
    m_prefixResolver = thePrefixResolver;
}



const XalanDOMString*
XPathExecutionContextDefault::getNamespaceForPrefix(const XalanDOMString&   prefix) const
{
    assert(m_prefixResolver != 0);

    return m_prefixResolver->getNamespaceForPrefix(prefix);
}



const XalanDOMString&
XPathExecutionContextDefault::findURIFromDoc(const XalanDocument*   owner) const
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->findURIFromDoc(owner);
}



const XalanDOMString&
XPathExecutionContextDefault::getUnparsedEntityURI(
            const XalanDOMString&   theName,
            const XalanDocument&    theDocument) const
{
    return m_domSupport->getUnparsedEntityURI(theName, theDocument);
}



bool
XPathExecutionContextDefault::shouldStripSourceNode(const XalanText&    /* node */)
{
    return false;
}



void
XPathExecutionContextDefault::error(
            const XalanDOMString&   msg,
            const XalanNode*        sourceNode,
            const LocatorType*      locator) const
{
    assert(m_xpathEnvSupport != 0);

    XalanLocator::size_type     lineNumber = XalanLocator::getUnknownValue();
    XalanLocator::size_type     columnNumber = XalanLocator::getUnknownValue();

    MemoryManagerType& theManager =  const_cast<XPathExecutionContextDefault*>(this)->getMemoryManager();

    XalanDOMString  uri(theManager);

    if (locator != 0)
    {
        lineNumber = locator->getLineNumber();
        columnNumber = locator->getColumnNumber();

        const XalanDOMChar*     id =
            locator->getPublicId();

        if (id != 0)
        {
            uri = id;
        }
        else
        {
            id = locator->getSystemId();

            if (id != 0)
            {
                uri = id;
            }
        }
    }

    if (m_xpathEnvSupport->problem(
            XPathEnvSupport::eXPATHProcessor, 
            XPathEnvSupport::eError,
            m_prefixResolver, 
            sourceNode,
            msg,
            c_wstr(uri),
            lineNumber,
            columnNumber) == true)
    {
        throw XalanXPathException(msg, uri, lineNumber, columnNumber, theManager);
    }
}



void
XPathExecutionContextDefault::warn(
            const XalanDOMString&   msg,
            const XalanNode*        sourceNode,
            const LocatorType*      locator) const
{
    assert(m_xpathEnvSupport != 0);

    XalanLocator::size_type     lineNumber = XalanLocator::getUnknownValue();
    XalanLocator::size_type     columnNumber = XalanLocator::getUnknownValue();

    MemoryManagerType& theManager =  const_cast<XPathExecutionContextDefault*>(this)->getMemoryManager();

    XalanDOMString  uri(theManager);

    if (locator != 0)
    {
        lineNumber = locator->getLineNumber();
        columnNumber = locator->getColumnNumber();

        const XalanDOMChar*     id =
            locator->getPublicId();

        if (id != 0)
        {
            uri = id;
        }
        else
        {
            id = locator->getSystemId();

            if (id != 0)
            {
                uri = id;
            }
        }
    }

    if (m_xpathEnvSupport->problem(
            XPathEnvSupport::eXPATHProcessor, 
            XPathEnvSupport::eWarning,
            m_prefixResolver, 
            sourceNode,
            msg,
            c_wstr(uri),
            lineNumber,
            columnNumber) == true)
    {
        throw XalanXPathException(msg, uri, lineNumber, columnNumber, theManager);
    }
}



void
XPathExecutionContextDefault::message(
            const XalanDOMString&   msg,
            const XalanNode*        sourceNode,
            const LocatorType*      locator) const
{
    assert(m_xpathEnvSupport != 0);

    XalanLocator::size_type     lineNumber = XalanLocator::getUnknownValue();
    XalanLocator::size_type     columnNumber = XalanLocator::getUnknownValue();

   MemoryManagerType& theManager =  const_cast<XPathExecutionContextDefault*>(this)->getMemoryManager();

    XalanDOMString  uri(theManager);

    if (locator != 0)
    {
        lineNumber = locator->getLineNumber();
        columnNumber = locator->getColumnNumber();

        const XalanDOMChar*     id =
            locator->getPublicId();

        if (id != 0)
        {
            uri = id;
        }
        else
        {
            id = locator->getSystemId();

            if (id != 0)
            {
                uri = id;
            }
        }
    }

    if (m_xpathEnvSupport->problem(
            XPathEnvSupport::eXPATHProcessor, 
            XPathEnvSupport::eMessage,
            m_prefixResolver, 
            sourceNode,
            msg,
            c_wstr(uri),
            lineNumber,
            columnNumber) == true)
    {
        throw XalanXPathException(msg, uri, lineNumber, columnNumber, theManager);
    }
}


XalanDocument*
XPathExecutionContextDefault::getSourceDocument(const XalanDOMString&   theURI) const
{
    assert(m_xpathEnvSupport != 0);

    return m_xpathEnvSupport->getSourceDocument(theURI);
}



void
XPathExecutionContextDefault::setSourceDocument(
            const XalanDOMString&   theURI,
            XalanDocument*          theDocument)
{
    assert(m_xpathEnvSupport != 0);

    m_xpathEnvSupport->setSourceDocument(theURI, theDocument);
}



void XPathExecutionContextDefault::formatNumber(
        double                              number,
        const XalanDOMString&               pattern,
        XalanDOMString&                     theResult,
        const XalanNode*                    context,
        const LocatorType*                  locator) 
{
    doFormatNumber(number, pattern, 0, theResult, context, locator);
}



void XPathExecutionContextDefault::formatNumber(
            double                              number,
            const XalanDOMString&               pattern,
            const XalanDOMString&               /* dfsName */,
            XalanDOMString&                     theResult,
            const XalanNode*                    context,
            const LocatorType*                  locator) 
{
    doFormatNumber(number, pattern, 0, theResult, context, locator);
}


    
void XPathExecutionContextDefault::doFormatNumber(
            double                              number,
            const XalanDOMString&               /* pattern */,
            const XalanDecimalFormatSymbols*    theDFS,
            XalanDOMString&                     theResult,
            const XalanNode*                    context,
            const LocatorType*                  locator) 
{
    if (DoubleSupport::isNaN(number) == true)
    {
        if (theDFS != 0)
        {
            theResult = theDFS->getNaN();
        }
        else
        {
            DoubleToDOMString(number, theResult);
        }
    }
    else if (DoubleSupport::isNegativeInfinity(number) == true)
    {
        if (theDFS != 0)
        {
            theResult = theDFS->getMinusSign();
            theResult += theDFS->getInfinity();
        }
        else
        {
            DoubleToDOMString(number, theResult);
        }
    }
    else if (DoubleSupport::isPositiveInfinity(number) == true )
    {
        if (theDFS != 0)
        {
            theResult = theDFS->getInfinity();
        }
        else
        {
            DoubleToDOMString(number, theResult);
        }
    }
    else
    {
        GetAndReleaseCachedString   theGuard(*this);

        warn( 
            XalanMessageLoader::getMessage(
                theGuard.get(),
                XalanMessages::FunctionIsNotImplemented_1Param,
                "format-number()"),
            context, 
            locator);

        DoubleToDOMString(number,theResult);
    }
}



XALAN_CPP_NAMESPACE_END