/**
* Get a global variable or parameter from the global stack frame.
*
* @param xctxt The XPath context, which must be passed in order to lazy evaluate variables.
* @param index Global variable index relative to the global stack frame bottom.
* @return The value of the variable.
* @throws TransformerException
*/
public XObject getGlobalVariable(XPathContext xctxt, final int index, boolean destructiveOK)
throws TransformerException {
XObject val = _stackFrames[index];
// Lazy execution of variables.
if (val.getType() == XObject.CLASS_UNRESOLVEDVARIABLE)
return (_stackFrames[index] = val.execute(xctxt));
return destructiveOK ? val : val.getFresh();
}
/**
* 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, boolean destructiveOK)
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 destructiveOK ? val : val.getFresh();
}