/**
* 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;
}
/**
* 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 {
Expression expr = ((ElemVariable) m_obj).getSelect().getExpression();
XObject xobj = expr.execute(xctxt);
xobj.allowDetachToRelease(false);
return xobj;
}