/**
* 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 variable based on it's qualified name. This is for external use only.
*
* @param xctxt The XPath context, which must be passed in order to lazy evaluate variables.
* @param qname The qualified name of the variable.
* @return The evaluated value of the variable.
* @throws javax.xml.transform.TransformerException
*/
public XObject getVariableOrParam(XPathContext xctxt, org.apache.xml.utils.QName qname)
throws javax.xml.transform.TransformerException {
org.apache.xml.utils.PrefixResolver prefixResolver = xctxt.getNamespaceContext();
// Get the current ElemTemplateElement, which must be pushed in as the
// prefix resolver, and then walk backwards in document order, searching
// for an xsl:param element or xsl:variable element that matches our
// qname. If we reach the top level, use the StylesheetRoot's composed
// list of top level variables and parameters.
if (prefixResolver instanceof org.apache.xalan.templates.ElemTemplateElement) {
org.apache.xalan.templates.ElemVariable vvar;
org.apache.xalan.templates.ElemTemplateElement prev =
(org.apache.xalan.templates.ElemTemplateElement) prefixResolver;
if (!(prev instanceof org.apache.xalan.templates.Stylesheet)) {
while (!(prev.getParentNode() instanceof org.apache.xalan.templates.Stylesheet)) {
org.apache.xalan.templates.ElemTemplateElement savedprev = prev;
while (null != (prev = prev.getPreviousSiblingElem())) {
if (prev instanceof org.apache.xalan.templates.ElemVariable) {
vvar = (org.apache.xalan.templates.ElemVariable) prev;
if (vvar.getName().equals(qname)) return getLocalVariable(xctxt, vvar.getIndex());
}
}
prev = savedprev.getParentElem();
}
}
vvar = prev.getStylesheetRoot().getVariableOrParamComposed(qname);
if (null != vvar) return getGlobalVariable(xctxt, vvar.getIndex());
}
throw new javax.xml.transform.TransformerException(
XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_VAR_NOT_RESOLVABLE,
new Object[] {qname.toString()})); // "Variable not resolvable: " + qname);
}