/**
* 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);
}
