void TXFMXPath::evaluateExpr(DOMNode *h, safeBuffer inexpr) {
// Temporarily add any necessary name spaces into the document
XSECXPathNodeList addedNodes;
setXPathNS(document, XPathAtts, addedNodes, formatter, mp_nse);
XPathProcessorImpl xppi; // The processor
XercesParserLiaison xpl;
#if XALAN_VERSION_MAJOR == 1 && XALAN_VERSION_MINOR > 10
XercesDOMSupport xds(xpl);
#else
XercesDOMSupport xds;
#endif
XPathEvaluator xpe;
XPathFactoryDefault xpf;
XPathConstructionContextDefault xpcc;
XalanDocument * xd;
XalanNode * contextNode;
// Xalan can throw exceptions in all functions, so do one broad catch point.
try {
// Map to Xalan
xd = xpl.createDocument(document);
// For performing mapping
XercesDocumentWrapper *xdw = xpl.mapDocumentToWrapper(xd);
XercesWrapperNavigator xwn(xdw);
// Map the "here" node - but only if part of current document
XalanNode * hereNode = NULL;
if (h->getOwnerDocument() == document) {
hereNode = xwn.mapNode(h);
if (hereNode == NULL) {
hereNode = findHereNodeFromXalan(&xwn, xd, h);
if (hereNode == NULL) {
throw XSECException(XSECException::XPathError,
"Unable to find here node in Xalan Wrapper map");
}
}
}
// Now work out what we have to set up in the new processing
TXFMBase::nodeType inputType = input->getNodeType();
XalanDOMString cd; // For the moment assume the root is the context
const XalanDOMChar * cexpr;
safeBuffer contextExpr;
switch (inputType) {
case DOM_NODE_DOCUMENT :
case DOM_NODE_XPATH_NODESET :
// do XPath over the whole document and, if the input was an
// XPath Nodeset, then later intersect the result with the input nodelist
cd = XalanDOMString("/"); // Root node
cexpr = cd.c_str();
// The context node is the "root" node
contextNode =
xpe.selectSingleNode(
xds,
xd,
cexpr,
xd->getDocumentElement());
break;
case DOM_NODE_DOCUMENT_FRAGMENT :
{
// Need to map the DOM_Node that we are given from the input to the appropriate XalanNode
// Create the XPath expression to find the node
if (input->getFragmentId() != NULL) {
contextExpr.sbTranscodeIn("//descendant-or-self::node()[attribute::Id='");
contextExpr.sbXMLChCat(input->getFragmentId());
contextExpr.sbXMLChCat("']");
// Map the node
contextNode =
xpe.selectSingleNode(
xds,
xd,
contextExpr.rawXMLChBuffer(), //XalanDOMString((char *) contextExpr.rawBuffer()).c_str(),
xd->getDocumentElement());
if (contextNode == NULL) {
// Last Ditch
contextNode = xwn.mapNode(input->getFragmentNode());
}
}
else
contextNode = xwn.mapNode(input->getFragmentNode());
if (contextNode == NULL) {
// Something wrong
throw XSECException(XSECException::XPathError, "Error mapping context node");
}
break;
}
default :
throw XSECException(XSECException::XPathError); // Should never get here
}
safeBuffer str;
XPathEnvSupportDefault xpesd;
XObjectFactoryDefault xof;
XPathExecutionContextDefault xpec(xpesd, xds, xof);
ElementPrefixResolverProxy pr(xd->getDocumentElement(), xpesd, xds);
// Work around the fact that the XPath implementation is designed for XSLT, so does
// not allow here() as a NCName.
// THIS IS A KLUDGE AND SHOULD BE DONE BETTER
int offset = 0;
safeBuffer k(KLUDGE_PREFIX);
k.sbStrcatIn(":");
offset = inexpr.sbStrstr("here()");
while (offset >= 0) {
if (offset == 0 || offset == 1 ||
(!(inexpr[offset - 1] == ':' && inexpr[offset - 2] != ':') &&
separator(inexpr[offset - 1]))) {
inexpr.sbStrinsIn(k.rawCharBuffer(), offset);
}
offset = inexpr.sbOffsetStrstr("here()", offset + 11);
}
// Install the External function in the Environment handler
if (hereNode != NULL) {
xpesd.installExternalFunctionLocal(XalanDOMString(URI_ID_DSIG), XalanDOMString("here"), DSIGXPathHere(hereNode));
}
str.sbStrcpyIn("(descendant-or-self::node() | descendant-or-self::node()/attribute::* | descendant-or-self::node()/namespace::*)[");
str.sbStrcatIn(inexpr);
str.sbStrcatIn("]");
XPath * xp = xpf.create();
XalanDOMString Xexpr((char *) str.rawBuffer());
xppi.initXPath(*xp, xpcc, Xexpr, pr);
// Now resolve
XObjectPtr xObj = xp->execute(contextNode, pr, xpec);
// Now map to a list that others can use (naieve list at this time)
const NodeRefListBase& lst = xObj->nodeset();
int size = (int) lst.getLength();
const DOMNode *item;
for (int i = 0; i < size; ++ i) {
if (lst.item(i) == xd)
m_XPathMap.addNode(document);
else {
item = xwn.mapNode(lst.item(i));
m_XPathMap.addNode(item);
}
}
if (inputType == DOM_NODE_XPATH_NODESET) {
//the input list was a XPATH nodeset, so we must intersect the
// results of the XPath processing done above with the input nodeset
m_XPathMap.intersect(input->getXPathNodeList());
}
}
catch (XSLException &e) {
safeBuffer msg;
// Whatever happens - fix any changes to the original document
clearXPathNS(document, addedNodes, formatter, mp_nse);
// Collate the exception message into an XSEC message.
msg.sbTranscodeIn("Xalan Exception : ");
#if defined (XSEC_XSLEXCEPTION_RETURNS_DOMSTRING)
msg.sbXMLChCat(e.getType().c_str());
#else
msg.sbXMLChCat(e.getType());
#endif
msg.sbXMLChCat(" caught. Message : ");
msg.sbXMLChCat(e.getMessage().c_str());
throw XSECException(XSECException::XPathError,
msg.rawXMLChBuffer());
}
clearXPathNS(document, addedNodes, formatter, mp_nse);
}
XSECXPathNodeList * TXFMXPathFilter::evaluateSingleExpr(DSIGXPathFilterExpr *expr) {
// Have a single expression that we wish to find the resultant nodeset
// for
XSECXPathNodeList addedNodes;
setXPathNS(document, expr->mp_NSMap, addedNodes, mp_formatter, mp_nse);
XPathProcessorImpl xppi; // The processor
XercesParserLiaison xpl;
#if XALAN_VERSION_MAJOR == 1 && XALAN_VERSION_MINOR > 10
XercesDOMSupport xds(xpl);
#else
XercesDOMSupport xds;
#endif
XPathEvaluator xpe;
XPathFactoryDefault xpf;
XPathConstructionContextDefault xpcc;
XalanDocument * xd;
XalanNode * contextNode;
// Xalan can throw exceptions in all functions, so do one broad catch point.
try {
// Map to Xalan
xd = xpl.createDocument(document);
// For performing mapping
XercesDocumentWrapper *xdw = xpl.mapDocumentToWrapper(xd);
XercesWrapperNavigator xwn(xdw);
// Map the "here" node
XalanNode * hereNode = NULL;
hereNode = xwn.mapNode(expr->mp_xpathFilterNode);
if (hereNode == NULL) {
hereNode = findHereNodeFromXalan(&xwn, xd, expr->mp_exprTextNode);
if (hereNode == NULL) {
throw XSECException(XSECException::XPathFilterError,
"Unable to find here node in Xalan Wrapper map");
}
}
// Now work out what we have to set up in the new processing
XalanDOMString cd; // For XPath Filter, the root is always the context node
cd = XalanDOMString("/"); // Root node
// The context node is the "root" node
contextNode =
xpe.selectSingleNode(
xds,
xd,
cd.c_str(),
xd->getDocumentElement());
XPathEnvSupportDefault xpesd;
XObjectFactoryDefault xof;
XPathExecutionContextDefault xpec(xpesd, xds, xof);
ElementPrefixResolverProxy pr(xd->getDocumentElement(), xpesd, xds);
// Work around the fact that the XPath implementation is designed for XSLT, so does
// not allow here() as a NCName.
// THIS IS A KLUDGE AND SHOULD BE DONE BETTER
int offset = 0;
safeBuffer k(KLUDGE_PREFIX);
k.sbStrcatIn(":");
// Map the expression into a local code page string (silly - should be XMLCh)
safeBuffer exprSB;
exprSB << (*mp_formatter << expr->m_expr.rawXMLChBuffer());
offset = exprSB.sbStrstr("here()");
while (offset >= 0) {
if (offset == 0 || offset == 1 ||
(!(exprSB[offset - 1] == ':' && exprSB[offset - 2] != ':') &&
separator(exprSB[offset - 1]))) {
exprSB.sbStrinsIn(k.rawCharBuffer(), offset);
}
offset = exprSB.sbOffsetStrstr("here()", offset + 11);
}
// Install the External function in the Environment handler
if (hereNode != NULL) {
xpesd.installExternalFunctionLocal(XalanDOMString(URI_ID_DSIG), XalanDOMString("here"), DSIGXPathHere(hereNode));
}
XPath * xp = xpf.create();
XalanDOMString Xexpr((char *) exprSB.rawBuffer());
xppi.initXPath(*xp, xpcc, Xexpr, pr);
// Now resolve
XObjectPtr xObj = xp->execute(contextNode, pr, xpec);
// Now map to a list that others can use (naieve list at this time)
const NodeRefListBase& lst = xObj->nodeset();
int size = (int) lst.getLength();
const DOMNode *item;
XSECXPathNodeList * ret;
XSECnew(ret, XSECXPathNodeList);
Janitor<XSECXPathNodeList> j_ret(ret);
for (int i = 0; i < size; ++ i) {
if (lst.item(i) == xd)
ret->addNode(document);
else {
item = xwn.mapNode(lst.item(i));
ret->addNode(item);
}
}
xpesd.uninstallExternalFunctionGlobal(XalanDOMString(URI_ID_DSIG), XalanDOMString("here"));
clearXPathNS(document, addedNodes, mp_formatter, mp_nse);
j_ret.release();
return ret;
}
catch (XSLException &e) {
safeBuffer msg;
// Whatever happens - fix any changes to the original document
clearXPathNS(document, addedNodes, mp_formatter, mp_nse);
// Collate the exception message into an XSEC message.
msg.sbTranscodeIn("Xalan Exception : ");
#if defined (XSEC_XSLEXCEPTION_RETURNS_DOMSTRING)
msg.sbXMLChCat(e.getType().c_str());
#else
msg.sbXMLChCat(e.getType());
#endif
msg.sbXMLChCat(" caught. Message : ");
msg.sbXMLChCat(e.getMessage().c_str());
throw XSECException(XSECException::XPathFilterError,
msg.rawXMLChBuffer());
}
catch (...) {
clearXPathNS(document, addedNodes, mp_formatter, mp_nse);
throw;
}
return NULL;
}