/** * 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()); } }