/**
* For support of literal objects in xpaths.
*
* @param xctxt The XPath execution context.
* @return This object.
* @throws javax.xml.transform.TransformerException
*/
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
if (!m_doneEval) {
this.m_transformer
.getMsgMgr()
.error(
xctxt.getSAXLocator(),
XSLTErrorResources.ER_REFERENCING_ITSELF,
new Object[] {((ElemVariable) this.object()).getName().getLocalName()});
}
VariableStack vars = xctxt.getVarStack();
// These three statements need to be combined into one operation.
int currentFrame = vars.getStackFrame();
//// vars.setStackFrame(m_varStackPos);
ElemVariable velem = (ElemVariable) m_obj;
try {
m_doneEval = false;
if (-1 != velem.m_frameSize) vars.link(velem.m_frameSize);
XObject var = velem.getValue(m_transformer, m_context);
m_doneEval = true;
return var;
} finally {
// These two statements need to be combined into one operation.
// vars.setStackFrame(currentFrame);
if (-1 != velem.m_frameSize) vars.unlink(currentFrame);
}
}
/**
* Get a local variable or parameter in the current stack frame.
*
* @param xctxt The XPath context, which must be passed in order to lazy evaluate variables.
* @param index Local variable index relative to the current stack frame bottom.
* @return The value of the variable.
* @throws TransformerException
*/
public XObject getLocalVariable(XPathContext xctxt, int index) throws TransformerException {
index += _currentFrameBottom;
XObject val = _stackFrames[index];
if (null == val)
throw new TransformerException(
XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_VARIABLE_ACCESSED_BEFORE_BIND, null),
xctxt.getSAXLocator());
// "Variable accessed before it is bound!", xctxt.getSAXLocator());
// Lazy execution of variables.
if (val.getType() == XObject.CLASS_UNRESOLVEDVARIABLE)
return (_stackFrames[index] = val.execute(xctxt));
return val;
}
/**
* 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+"'");
}
}
