Example usage for javax.xml.xpath XPathExpressionException getCause

Introduction

In this page you can find the example usage for javax.xml.xpath XPathExpressionException getCause.

Prototype

public Throwable getCause() 

Source Link

Document

Get the cause of this XPathException.

Usage

From source file:org.apache.ode.bpel.rtrep.v2.xpath20.XPath20ExpressionRuntime.java

private Object evaluate(OExpression cexp, EvaluationContext ctx, QName type) throws FaultException {
    try {/*w w w . j av a  2  s. co  m*/
        OXPath20ExpressionBPEL20 oxpath20 = ((OXPath20ExpressionBPEL20) cexp);
        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_SAXON,
                "net.sf.saxon.xpath.XPathFactoryImpl");
        // JAXP based XPath 1.0 runtime does not work anymore after a XPath 2.0 has been evaluated if this is set.
        // System.setProperty("javax.xml.xpath.XPathFactory:"+XPathConstants.DOM_OBJECT_MODEL,
        //        "net.sf.saxon.xpath.XPathFactoryImpl");
        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_JDOM,
                "net.sf.saxon.xpath.XPathFactoryImpl");
        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_XOM,
                "net.sf.saxon.xpath.XPathFactoryImpl");
        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_DOM4J,
                "net.sf.saxon.xpath.XPathFactoryImpl");

        XPathFactory xpf = XPathFactory.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON);
        JaxpFunctionResolver funcResolver = new JaxpFunctionResolver(ctx, oxpath20);
        JaxpVariableResolver varResolver = new JaxpVariableResolver(ctx, oxpath20,
                ((XPathFactoryImpl) xpf).getConfiguration());
        xpf.setXPathFunctionResolver(funcResolver);
        xpf.setXPathVariableResolver(varResolver);
        XPath xpe = xpf.newXPath();
        xpe.setNamespaceContext(oxpath20.namespaceCtx);
        XPathExpression expr = xpe.compile(((OXPath10Expression) cexp).xpath);
        Node contextNode = ctx.getRootNode() == null ? DOMUtils.newDocument() : ctx.getRootNode();
        // Create step nodes in XPath in case it is incompletely instantiated 
        if (oxpath20.insertMissingData) {
            XPath20ExpressionModifier modifier = new XPath20ExpressionModifier(oxpath20.namespaceCtx,
                    ((XPathFactoryImpl) xpf).getConfiguration().getNamePool());
            Node temp = ctx.getRootNode();
            if (temp.getLocalName().equals("message") && temp.getNamespaceURI() == null
                    && temp.getFirstChild() != null && temp.getFirstChild().getFirstChild() != null) {
                modifier.insertMissingData(expr, temp.getFirstChild().getFirstChild());
            } else {
                modifier.insertMissingData(expr, temp);
            }
        }

        Object evalResult = expr.evaluate(contextNode, type);
        if (evalResult != null && __log.isDebugEnabled()) {
            __log.debug("Expression " + cexp.toString() + " generated result " + evalResult + " - type="
                    + evalResult.getClass().getName());
            if (ctx.getRootNode() != null)
                __log.debug("Was using context node " + DOMUtils.domToString(ctx.getRootNode()));
        }
        return evalResult;
    } catch (XPathExpressionException e) {
        // Extracting the real cause from all this wrapping isn't a simple task
        Throwable cause = e.getCause() != null ? e.getCause() : e;
        if (cause instanceof DynamicError) {
            Throwable th = ((DynamicError) cause).getException();
            if (th != null) {
                cause = th;
                if (cause.getCause() != null)
                    cause = cause.getCause();
            }
        }
        throw new FaultException(cexp.getOwner().constants.qnSubLanguageExecutionFault, cause.getMessage(),
                cause);
    } catch (WrappedFaultException wre) {
        __log.debug("Could not evaluate expression because of ", wre);
        throw (FaultException) wre.getCause();
    } catch (Throwable t) {
        __log.debug("Could not evaluate expression because of ", t);
        throw new FaultException(cexp.getOwner().constants.qnSubLanguageExecutionFault, t.getMessage(), t);
    }

}

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