/**
* Finds the node causing a NPE for diadic operators.
* @param xrt the RuntimeException
* @param node the parent node
* @param left the left argument
* @param right the right argument
* @return the left, right or parent node
*/
protected JexlNode findNullOperand(RuntimeException xrt, JexlNode node, Object left, Object right) {
if (xrt instanceof ArithmeticException
&& JexlException.NULL_OPERAND == xrt.getMessage()) {
if (left == null)
{
return node.jjtGetChild(0);
}
if (right == null)
{
return node.jjtGetChild(1);
}
}
return node;
}