Exception when trying to create xpath object
Added by Anonymous almost 15 years ago
Legacy ID: #7627715 Legacy Poster: David Paterson (crazeydave)
Hi, When I try to create an xpath object I get the following exception; Exception in thread "main" java.lang.IllegalAccessError: tried to access method net.sf.saxon.functions.SystemFunctionLibrary.<init>(I)V from class net.sf.saxon.xpath.StandaloneContext at net.sf.saxon.xpath.StandaloneContext.<init>(StandaloneContext.java:75) at net.sf.saxon.xpath.XPathEvaluator.<init>(XPathEvaluator.java:56) at net.sf.saxon.xpath.XPathFactoryImpl.newXPath(XPathFactoryImpl.java:96) at com.bp.ist.tct.gops.gh.MessageValidator.XMLValidate(MessageValidator.java:147) at com.bp.ist.tct.gops.gh.TestValidator.main(TestValidator.java:21) Here is the function that it is ocuring in; package com.bp.ist.tct.gops.gh; import java.io.ByteArrayInputStream; import java.io.IOException; import java.util.; import org.w3c.dom.; import org.xml.sax.; import javax.xml.parsers.; import javax.xml.namespace.NamespaceContext; import net.sf.saxon.dom.; import net.sf.saxon.xpath.; import net.sf.saxon.instruct.; import net.sf.saxon.om.NamespaceConstant; import com.ghc.ghTester.expressions.; import javax.xml.xpath.*; public static String XMLValidate(String Source, String Target,String Criteria) throws SAXException, ParserConfigurationException { //System.setProperty("javax.xml.parsers.DocumentBuilderFactory","net.sf.saxon.om.DocumentBuilderFactoryImpl"); Boolean valid = true; StringBuffer strResult = new StringBuffer(); DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); builderFactory.setNamespaceAware(true); DocumentBuilder builder = null; builder = builderFactory.newDocumentBuilder(); Document sourceDocument = null; Document targetDocument = null; XPathFactory xpathFact; try { xpathFact = net.sf.saxon.xpath.XPathFactoryImpl.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON); XPath xpath = xpathFact.newXPath(); xpath.setNamespaceContext(ctx); try { sourceDocument = builder.parse(new InputSource(new ByteArrayInputStream(Source.getBytes()))); } catch (IOException e) { e.printStackTrace(); } try { targetDocument = builder.parse(new InputSource(new ByteArrayInputStream(Target.getBytes()))); } catch (IOException e) { e.printStackTrace(); } String[] paths = null; if (Criteria.startsWith(""")) { Criteria = Criteria.substring(1); } if (Criteria.endsWith(""")) { Criteria = Criteria.substring(0, Criteria.length()-1); } paths = Criteria.split(","); for (String path : paths) { XPathExpression expr = null; System.out.println("Checking Path->" + path); try { expr = xpath.compile(path); } catch (XPathExpressionException e) { e.printStackTrace(); } String sourceValue = null; net.sf.saxon.dom.NodeWrapper sourceNode; try { sourceNode = (net.sf.saxon.dom.NodeWrapper)expr.evaluate(sourceDocument, XPathConstants.NODE); sourceValue = sourceNode.getStringValue(); } catch (Exception e) { sourceValue = "SOURCE ELEMENT NOT FOUND! " + e; } String targetValue = null; Node targetNode; try { targetNode = (Node)expr.evaluate(targetDocument, XPathConstants.NODE); targetValue = targetNode.getTextContent(); } catch (Exception e) { targetValue = "TARGET ELEMENT NOT FOUND! " + e; } if (!sourceValue.equals(targetValue)) { strResult.append("\nCritera -> " + path + "\n"); strResult.append("Source -> " + sourceValue + "\n"); strResult.append("Target -> " + targetValue + "\n"); valid = false; } } } catch (XPathFactoryConfigurationException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return valid.toString().toUpperCase() + "\n" + strResult.toString(); } I would appreciate any help you could give, thanks
Replies (1)
RE: Exception when trying to create xpath object
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Added by Anonymous almost 15 years ago
Legacy ID: #7630269 Legacy Poster: Michael Kay (mhkay)
I think the most likely explanation for this error is a classpath problem: you are loading the saxon9-xpath.jar issued with a different version of Saxon from the main saxon9.jar, and hence you have a problem when doing a method call across the boundary between these Jar files.
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