/**
* Given an expression and a context, evaluate the XPath and return the result.
*
* @param xctxt The execution context.
* @param contextNode The node that "." expresses.
* @param namespaceContext The context in which namespaces in the XPath are supposed to be
* expanded.
* @throws TransformerException thrown if the active ProblemListener decides the error condition
* is severe enough to halt processing.
* @throws javax.xml.transform.TransformerException
* @xsl.usage experimental
*/
public XObject execute(XPathContext xctxt, int contextNode, PrefixResolver namespaceContext)
throws javax.xml.transform.TransformerException {
xctxt.pushNamespaceContext(namespaceContext);
xctxt.pushCurrentNodeAndExpression(contextNode, contextNode);
XObject xobj = null;
try {
xobj = m_mainExp.execute(xctxt);
} catch (TransformerException te) {
te.setLocator(this.getLocator());
ErrorListener el = xctxt.getErrorListener();
if (null != el) // defensive, should never happen.
{
el.error(te);
} else throw te;
} catch (Exception e) {
while (e instanceof com.sun.org.apache.xml.internal.utils.WrappedRuntimeException) {
e = ((com.sun.org.apache.xml.internal.utils.WrappedRuntimeException) e).getException();
}
// e.printStackTrace();
String msg = e.getMessage();
if (msg == null || msg.length() == 0) {
msg = XSLMessages.createXPATHMessage(XPATHErrorResources.ER_XPATH_ERROR, null);
}
TransformerException te = new TransformerException(msg, getLocator(), e);
ErrorListener el = xctxt.getErrorListener();
// te.printStackTrace();
if (null != el) // defensive, should never happen.
{
el.fatalError(te);
} else throw te;
} finally {
xctxt.popNamespaceContext();
xctxt.popCurrentNodeAndExpression();
}
return xobj;
}
/**
* Warn the user of an problem.
*
* @param xctxt The XPath runtime context.
* @param sourceNode Not used.
* @param msg An error msgkey that corresponds to one of the constants found in {@link
* com.sun.org.apache.xpath.internal.res.XPATHErrorResources}, which is a key for a format
* string.
* @param args An array of arguments represented in the format string, which may be null.
* @throws TransformerException if the current ErrorListoner determines to throw an exception.
*/
public void warn(XPathContext xctxt, int sourceNode, String msg, Object[] args)
throws javax.xml.transform.TransformerException {
String fmsg = XSLMessages.createXPATHWarning(msg, args);
ErrorListener ehandler = xctxt.getErrorListener();
if (null != ehandler) {
// TO DO: Need to get stylesheet Locator from here.
ehandler.warning(new TransformerException(fmsg, (SAXSourceLocator) xctxt.getSAXLocator()));
}
}
/**
* Tell the user of an error, and probably throw an exception.
*
* @param xctxt The XPath runtime context.
* @param sourceNode Not used.
* @param msg An error msgkey that corresponds to one of the constants found in {@link
* com.sun.org.apache.xpath.internal.res.XPATHErrorResources}, which is a key for a format
* string.
* @param args An array of arguments represented in the format string, which may be null.
* @throws TransformerException if the current ErrorListoner determines to throw an exception.
*/
public void error(XPathContext xctxt, int sourceNode, String msg, Object[] args)
throws javax.xml.transform.TransformerException {
String fmsg = XSLMessages.createXPATHMessage(msg, args);
ErrorListener ehandler = xctxt.getErrorListener();
if (null != ehandler) {
ehandler.fatalError(new TransformerException(fmsg, (SAXSourceLocator) xctxt.getSAXLocator()));
} else {
SourceLocator slocator = xctxt.getSAXLocator();
System.out.println(
fmsg
+ "; file "
+ slocator.getSystemId()
+ "; line "
+ slocator.getLineNumber()
+ "; column "
+ slocator.getColumnNumber());
}
}
