/**
* Execute a variable declaration and push it onto the variable stack.
*
* @see <a href="http://www.w3.org/TR/xslt#variables">variables in XSLT Specification</a>
* @param transformer non-null reference to the the current transform-time state.
* @throws javax.xml.transform.TransformerException
*/
public void execute(TransformerImpl transformer) throws TransformerException {
if (transformer.getDebug()) transformer.getTraceManager().fireTraceEvent(this);
int sourceNode = transformer.getXPathContext().getCurrentNode();
XObject var = getValue(transformer, sourceNode);
// transformer.getXPathContext().getVarStack().pushVariable(m_qname, var);
transformer.getXPathContext().getVarStack().setLocalVariable(m_index, var);
if (transformer.getDebug()) transformer.getTraceManager().fireTraceEndEvent(this);
}
/**
* Get the XObject representation of the variable.
*
* @param transformer non-null reference to the the current transform-time state.
* @param sourceNode non-null reference to the <a
* href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
* @return the XObject representation of the variable.
* @throws javax.xml.transform.TransformerException
*/
public XObject getValue(TransformerImpl transformer, int sourceNode) throws TransformerException {
XObject var;
XPathContext xctxt = transformer.getXPathContext();
xctxt.pushCurrentNode(sourceNode);
try {
if (null != m_selectPattern) {
var = m_selectPattern.execute(xctxt, sourceNode, this);
var.allowDetachToRelease(false);
if (transformer.getDebug())
transformer
.getTraceManager()
.fireSelectedEvent(sourceNode, this, "select", m_selectPattern, var);
} else if (null == getFirstChildElem()) {
var = XString.EMPTYSTRING;
} else {
// Use result tree fragment.
// Global variables may be deferred (see XUnresolvedVariable) and hence
// need to be assigned to a different set of DTMs than local variables
// so they aren't popped off the stack on return from a template.
int df;
// Bugzilla 7118: A variable set via an RTF may create local
// variables during that computation. To keep them from overwriting
// variables at this level, push a new variable stack.
////// PROBLEM: This is provoking a variable-used-before-set
////// problem in parameters. Needs more study.
try {
////////// xctxt.getVarStack().link(0);
if (m_parentNode instanceof Stylesheet) // Global variable
df = transformer.transformToGlobalRTF(this);
else df = transformer.transformToRTF(this);
} finally {
////////////// xctxt.getVarStack().unlink();
}
var = new XRTreeFrag(df, xctxt, this);
}
} finally {
xctxt.popCurrentNode();
}
return var;
}
/**
* Perform a query if needed, and call transformNode for each child.
*
* @param transformer non-null reference to the the current transform-time state.
* @throws TransformerException Thrown in a variety of circumstances.
* @xsl.usage advanced
*/
public void transformSelectedNodes(TransformerImpl transformer) throws TransformerException {
final XPathContext xctxt = transformer.getXPathContext();
final int sourceNode = xctxt.getCurrentNode();
DTMIterator sourceNodes = m_selectExpression.asIterator(xctxt, sourceNode);
try {
final Vector keys =
(m_sortElems == null) ? null : transformer.processSortKeys(this, sourceNode);
// Sort if we need to.
if (null != keys) sourceNodes = sortNodes(xctxt, keys, sourceNodes);
if (transformer.getDebug()) {
// The original code, which is broken for bug#16889,
// which fails to get the original select expression in the select event.
/* transformer.getTraceManager().fireSelectedEvent(
* sourceNode,
* this,
* "select",
* new XPath(m_selectExpression),
* new org.apache.xpath.objects.XNodeSet(sourceNodes));
*/
// The following code fixes bug#16889
// Solution: Store away XPath in setSelect(Xath), and use it here.
// Pass m_xath, which the current node is associated with, onto the TraceManager.
Expression expr = m_xpath.getExpression();
org.apache.xpath.objects.XObject xObject = expr.execute(xctxt);
int current = xctxt.getCurrentNode();
transformer.getTraceManager().fireSelectedEvent(current, this, "select", m_xpath, xObject);
}
xctxt.pushCurrentNode(DTM.NULL);
IntStack currentNodes = xctxt.getCurrentNodeStack();
xctxt.pushCurrentExpressionNode(DTM.NULL);
IntStack currentExpressionNodes = xctxt.getCurrentExpressionNodeStack();
xctxt.pushSAXLocatorNull();
xctxt.pushContextNodeList(sourceNodes);
transformer.pushElemTemplateElement(null);
// pushParams(transformer, xctxt);
// Should be able to get this from the iterator but there must be a bug.
DTM dtm = xctxt.getDTM(sourceNode);
int docID = sourceNode & DTMManager.IDENT_DTM_DEFAULT;
int child;
while (DTM.NULL != (child = sourceNodes.nextNode())) {
currentNodes.setTop(child);
currentExpressionNodes.setTop(child);
if ((child & DTMManager.IDENT_DTM_DEFAULT) != docID) {
dtm = xctxt.getDTM(child);
docID = child & DTMManager.IDENT_DTM_DEFAULT;
}
// final int exNodeType = dtm.getExpandedTypeID(child);
final int nodeType = dtm.getNodeType(child);
// Fire a trace event for the template.
if (transformer.getDebug()) {
transformer.getTraceManager().fireTraceEvent(this);
}
// And execute the child templates.
// Loop through the children of the template, calling execute on
// each of them.
for (ElemTemplateElement t = this.m_firstChild; t != null; t = t.m_nextSibling) {
xctxt.setSAXLocator(t);
transformer.setCurrentElement(t);
t.execute(transformer);
}
if (transformer.getDebug()) {
// We need to make sure an old current element is not
// on the stack. See TransformerImpl#getElementCallstack.
transformer.setCurrentElement(null);
transformer.getTraceManager().fireTraceEndEvent(this);
}
// KLUGE: Implement <?xalan:doc_cache_off?>
// ASSUMPTION: This will be set only when the XPath was indeed
// a call to the Document() function. Calling it in other
// situations is likely to fry Xalan.
//
// %REVIEW% We need a MUCH cleaner solution -- one that will
// handle cleaning up after document() and getDTM() in other
// contexts. The whole SourceTreeManager mechanism should probably
// be moved into DTMManager rather than being explicitly invoked in
// FuncDocument and here.
if (m_doc_cache_off) {
if (DEBUG)
System.out.println(
"JJK***** CACHE RELEASE *****\n" + "\tdtm=" + dtm.getDocumentBaseURI());
// NOTE: This will work because this is _NOT_ a shared DTM, and thus has
// only a single Document node. If it could ever be an RTF or other
// shared DTM, this would require substantial rework.
xctxt.getSourceTreeManager().removeDocumentFromCache(dtm.getDocument());
xctxt.release(dtm, false);
}
}
} finally {
if (transformer.getDebug())
transformer
.getTraceManager()
.fireSelectedEndEvent(
sourceNode,
this,
"select",
new XPath(m_selectExpression),
new org.apache.xpath.objects.XNodeSet(sourceNodes));
xctxt.popSAXLocator();
xctxt.popContextNodeList();
transformer.popElemTemplateElement();
xctxt.popCurrentExpressionNode();
xctxt.popCurrentNode();
sourceNodes.detach();
}
}
/**
* Copy a Literal Result Element into the Result tree, copy the non-excluded namespace attributes,
* copy the attributes not of the XSLT namespace, and execute the children of the LRE.
*
* @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT
* Specification</a>
* @param transformer non-null reference to the the current transform-time state.
* @throws TransformerException
*/
public void execute(TransformerImpl transformer) throws TransformerException {
SerializationHandler rhandler = transformer.getSerializationHandler();
try {
// JJK Bugzilla 3464, test namespace85 -- make sure LRE's
// namespace is asserted even if default, since xsl:element
// may have changed the context.
rhandler.startPrefixMapping(getPrefix(), getNamespace());
// Add namespace declarations.
executeNSDecls(transformer);
rhandler.startElement(getNamespace(), getLocalName(), getRawName());
} catch (SAXException se) {
throw new TransformerException(se);
}
/*
* If we make it to here we have done a successful startElement()
* we will do an endElement() call for balance, no matter what happens
* in the middle.
*/
// tException remembers if we had an exception "in the middle"
TransformerException tException = null;
try {
// Process any possible attributes from xsl:use-attribute-sets first
super.execute(transformer);
// xsl:version, excludeResultPrefixes???
// Process the list of avts next
if (null != m_avts) {
int nAttrs = m_avts.size();
for (int i = (nAttrs - 1); i >= 0; i--) {
AVT avt = (AVT) m_avts.get(i);
XPathContext xctxt = transformer.getXPathContext();
int sourceNode = xctxt.getCurrentNode();
String stringedValue = avt.evaluate(xctxt, sourceNode, this);
if (null != stringedValue) {
// Important Note: I'm not going to check for excluded namespace
// prefixes here. It seems like it's too expensive, and I'm not
// even sure this is right. But I could be wrong, so this needs
// to be tested against other implementations.
rhandler.addAttribute(
avt.getURI(), avt.getName(), avt.getRawName(), "CDATA", stringedValue, false);
}
} // end for
}
// Now process all the elements in this subtree
// TODO: Process m_extensionElementPrefixes && m_attributeSetsNames
transformer.executeChildTemplates(this, true);
} catch (TransformerException te) {
// thrown in finally to prevent original exception consumed by subsequent exceptions
tException = te;
} catch (SAXException se) {
tException = new TransformerException(se);
}
try {
/* we need to do this endElement() to balance the
* successful startElement() call even if
* there was an exception in the middle.
* Otherwise an exception in the middle could cause a system to hang.
*/
rhandler.endElement(getNamespace(), getLocalName(), getRawName());
} catch (SAXException se) {
/* we did call endElement(). If thee was an exception
* in the middle throw that one, otherwise if there
* was an exception from endElement() throw that one.
*/
if (tException != null) throw tException;
else throw new TransformerException(se);
}
/* If an exception was thrown in the middle but not with startElement() or
* or endElement() then its time to let it percolate.
*/
if (tException != null) throw tException;
unexecuteNSDecls(transformer);
// JJK Bugzilla 3464, test namespace85 -- balance explicit start.
try {
rhandler.endPrefixMapping(getPrefix());
} catch (SAXException se) {
throw new TransformerException(se);
}
}
/**
* <meta name="usage" content="advanced"/> Perform a query if needed, and call transformNode for
* each child.
*
* @param transformer non-null reference to the the current transform-time state.
* @param template The owning template context.
* @throws TransformerException Thrown in a variety of circumstances.
*/
public void transformSelectedNodes(TransformerImpl transformer) throws TransformerException {
final XPathContext xctxt = transformer.getXPathContext();
final int sourceNode = xctxt.getCurrentNode();
DTMIterator sourceNodes = m_selectExpression.asIterator(xctxt, sourceNode);
VariableStack vars = xctxt.getVarStack();
int nParams = getParamElemCount();
int thisframe = vars.getStackFrame();
StackGuard guard = transformer.getStackGuard();
boolean check = (guard.getRecursionLimit() > -1) ? true : false;
try {
final Vector keys =
(m_sortElems == null) ? null : transformer.processSortKeys(this, sourceNode);
// Sort if we need to.
if (null != keys) sourceNodes = sortNodes(xctxt, keys, sourceNodes);
if (TransformerImpl.S_DEBUG) {
transformer
.getTraceManager()
.fireSelectedEvent(
sourceNode,
this,
"select",
new XPath(m_selectExpression),
new org.apache.xpath.objects.XNodeSet(sourceNodes));
}
final ResultTreeHandler rth = transformer.getResultTreeHandler();
ContentHandler chandler = rth.getContentHandler();
final StylesheetRoot sroot = transformer.getStylesheet();
final TemplateList tl = sroot.getTemplateListComposed();
final boolean quiet = transformer.getQuietConflictWarnings();
// Should be able to get this from the iterator but there must be a bug.
DTM dtm = xctxt.getDTM(sourceNode);
int argsFrame = -1;
if (nParams > 0) {
// This code will create a section on the stack that is all the
// evaluated arguments. These will be copied into the real params
// section of each called template.
argsFrame = vars.link(nParams);
vars.setStackFrame(thisframe);
for (int i = 0; i < nParams; i++) {
ElemWithParam ewp = m_paramElems[i];
XObject obj = ewp.getValue(transformer, sourceNode);
vars.setLocalVariable(i, obj, argsFrame);
}
vars.setStackFrame(argsFrame);
}
xctxt.pushCurrentNode(DTM.NULL);
IntStack currentNodes = xctxt.getCurrentNodeStack();
xctxt.pushCurrentExpressionNode(DTM.NULL);
IntStack currentExpressionNodes = xctxt.getCurrentExpressionNodeStack();
xctxt.pushSAXLocatorNull();
xctxt.pushContextNodeList(sourceNodes);
transformer.pushElemTemplateElement(null);
// pushParams(transformer, xctxt);
int child;
while (DTM.NULL != (child = sourceNodes.nextNode())) {
currentNodes.setTop(child);
currentExpressionNodes.setTop(child);
if (xctxt.getDTM(child) != dtm) {
dtm = xctxt.getDTM(child);
}
final int exNodeType = dtm.getExpandedTypeID(child);
final int nodeType = dtm.getNodeType(child);
final QName mode = transformer.getMode();
ElemTemplate template = tl.getTemplateFast(xctxt, child, exNodeType, mode, -1, quiet, dtm);
// If that didn't locate a node, fall back to a default template rule.
// See http://www.w3.org/TR/xslt#built-in-rule.
if (null == template) {
switch (nodeType) {
case DTM.DOCUMENT_FRAGMENT_NODE:
case DTM.ELEMENT_NODE:
template = sroot.getDefaultRule();
// %OPT% direct faster?
break;
case DTM.ATTRIBUTE_NODE:
case DTM.CDATA_SECTION_NODE:
case DTM.TEXT_NODE:
// if(rth.m_elemIsPending || rth.m_docPending)
// rth.flushPending(true);
transformer.pushPairCurrentMatched(sroot.getDefaultTextRule(), child);
transformer.setCurrentElement(sroot.getDefaultTextRule());
// dtm.dispatchCharactersEvents(child, chandler, false);
dtm.dispatchCharactersEvents(child, rth, false);
transformer.popCurrentMatched();
continue;
case DTM.DOCUMENT_NODE:
template = sroot.getDefaultRootRule();
break;
default:
// No default rules for processing instructions and the like.
continue;
}
} else {
transformer.setCurrentElement(template);
}
transformer.pushPairCurrentMatched(template, child);
if (check) guard.checkForInfinateLoop();
int currentFrameBottom; // See comment with unlink, below
if (template.m_frameSize > 0) {
xctxt.pushRTFContext();
currentFrameBottom = vars.getStackFrame(); // See comment with unlink, below
vars.link(template.m_frameSize);
// You can't do the check for nParams here, otherwise the
// xsl:params might not be nulled.
if (
/* nParams > 0 && */ template.m_inArgsSize > 0) {
int paramIndex = 0;
for (ElemTemplateElement elem = template.getFirstChildElem();
null != elem;
elem = elem.getNextSiblingElem()) {
if (Constants.ELEMNAME_PARAMVARIABLE == elem.getXSLToken()) {
ElemParam ep = (ElemParam) elem;
int i;
for (i = 0; i < nParams; i++) {
ElemWithParam ewp = m_paramElems[i];
if (ewp.m_qnameID == ep.m_qnameID) {
XObject obj = vars.getLocalVariable(i, argsFrame);
vars.setLocalVariable(paramIndex, obj);
break;
}
}
if (i == nParams) vars.setLocalVariable(paramIndex, null);
} else break;
paramIndex++;
}
}
} else currentFrameBottom = 0;
// Fire a trace event for the template.
if (TransformerImpl.S_DEBUG) transformer.getTraceManager().fireTraceEvent(template);
// And execute the child templates.
// Loop through the children of the template, calling execute on
// each of them.
for (ElemTemplateElement t = template.m_firstChild; t != null; t = t.m_nextSibling) {
xctxt.setSAXLocator(t);
try {
transformer.pushElemTemplateElement(t);
t.execute(transformer);
} finally {
transformer.popElemTemplateElement();
}
}
if (TransformerImpl.S_DEBUG) transformer.getTraceManager().fireTraceEndEvent(template);
if (template.m_frameSize > 0) {
// See Frank Weiss bug around 03/19/2002 (no Bugzilla report yet).
// While unlink will restore to the proper place, the real position
// may have been changed for xsl:with-param, so that variables
// can be accessed.
// of right now.
// More:
// When we entered this function, the current
// frame buffer (cfb) index in the variable stack may
// have been manually set. If we just call
// unlink(), however, it will restore the cfb to the
// previous link index from the link stack, rather than
// the manually set cfb. So,
// the only safe solution is to restore it back
// to the same position it was on entry, since we're
// really not working in a stack context here. (Bug4218)
vars.unlink(currentFrameBottom);
xctxt.popRTFContext();
}
transformer.popCurrentMatched();
} // end while (DTM.NULL != (child = sourceNodes.nextNode()))
} catch (SAXException se) {
transformer.getErrorListener().fatalError(new TransformerException(se));
} finally {
if (TransformerImpl.S_DEBUG)
transformer
.getTraceManager()
.fireSelectedEndEvent(
sourceNode,
this,
"select",
new XPath(m_selectExpression),
new org.apache.xpath.objects.XNodeSet(sourceNodes));
// Unlink to the original stack frame
if (nParams > 0) vars.unlink(thisframe);
xctxt.popSAXLocator();
xctxt.popContextNodeList();
transformer.popElemTemplateElement();
xctxt.popCurrentExpressionNode();
xctxt.popCurrentNode();
sourceNodes.detach();
}
}
/**
* Invoke a named template.
*
* @see <a href="http://www.w3.org/TR/xslt#named-templates">named-templates in XSLT
* Specification</a>
* @param transformer non-null reference to the the current transform-time state.
* @throws TransformerException
*/
public void execute(TransformerImpl transformer) throws TransformerException {
if (null != m_template) {
XPathContext xctxt = transformer.getXPathContext();
VariableStack vars = xctxt.getVarStack();
int thisframe = vars.getStackFrame();
int nextFrame = vars.link(m_template.m_frameSize);
// We have to clear the section of the stack frame that has params
// so that the default param evaluation will work correctly.
if (m_template.m_inArgsSize > 0) {
vars.clearLocalSlots(0, m_template.m_inArgsSize);
if (null != m_paramElems) {
int currentNode = xctxt.getCurrentNode();
vars.setStackFrame(thisframe);
int size = m_paramElems.length;
for (int i = 0; i < size; i++) {
ElemWithParam ewp = m_paramElems[i];
if (ewp.m_index >= 0) {
XObject obj = ewp.getValue(transformer, currentNode);
// Note here that the index for ElemWithParam must have been
// statically made relative to the xsl:template being called,
// NOT this xsl:template.
vars.setLocalVariable(ewp.m_index, obj, nextFrame);
}
}
vars.setStackFrame(nextFrame);
}
}
SourceLocator savedLocator = xctxt.getSAXLocator();
try {
xctxt.setSAXLocator(m_template);
// template.executeChildTemplates(transformer, sourceNode, mode, true);
transformer.pushElemTemplateElement(m_template);
m_template.execute(transformer);
} finally {
transformer.popElemTemplateElement();
xctxt.setSAXLocator(savedLocator);
// When we entered this function, the current
// frame buffer (cfb) index in the variable stack may
// have been manually set. If we just call
// unlink(), however, it will restore the cfb to the
// previous link index from the link stack, rather than
// the manually set cfb. So,
// the only safe solution is to restore it back
// to the same position it was on entry, since we're
// really not working in a stack context here. (Bug4218)
vars.unlink(thisframe);
}
} else {
transformer
.getMsgMgr()
.error(
this,
XSLTErrorResources.ER_TEMPLATE_NOT_FOUND,
new Object[] {
m_templateName
}); // "Could not find template named: '"+templateName+"'");
}
}