/**
* <code>systemId</code> returns the system id of the current context node.
*
* @param context an <code>ExpressionContext</code> value
* @return a <code>String</code> value
*/
public static String systemId(ExpressionContext context) {
Node contextNode = context.getContextNode();
int nodeHandler = ((DTMNodeProxy) contextNode).getDTMNodeNumber();
SourceLocator locator = ((DTMNodeProxy) contextNode).getDTM().getSourceLocatorFor(nodeHandler);
if (locator != null) return locator.getSystemId();
else return null;
}
/**
* <code>columnNumber</code> returns the column number of the current context node.
*
* <p>NOTE: Xalan does not normally record location information for each node. To obtain it, you
* must set the custom TrAX attribute "http://xml.apache.org/xalan/features/source_location" true
* in the TransformerFactory before generating the Transformer and executing the stylesheet.
* Storage cost per node will be noticably increased in this mode.
*
* @param context an <code>ExpressionContext</code> value
* @return an <code>int</code> value. This may be -1 to indicate that the column number is not
* known.
*/
public static int columnNumber(ExpressionContext context) {
Node contextNode = context.getContextNode();
int nodeHandler = ((DTMNodeProxy) contextNode).getDTMNodeNumber();
SourceLocator locator = ((DTMNodeProxy) contextNode).getDTM().getSourceLocatorFor(nodeHandler);
if (locator != null) return locator.getColumnNumber();
else return -1;
}