Examples with XNull org.apache.xpath.objects.XNull used on opensource projects

Example 1 with XNull

use of org.apache.xpath.objects.XNull in project freemarker by apache.

the class XalanXPathSupport method executeQuery.

/* " + ERRMSG_RECOMMEND_JAXEN;*/
public synchronized TemplateModel executeQuery(Object context, String xpathQuery) throws TemplateModelException {
    if (!(context instanceof Node)) {
        if (context != null) {
            if (isNodeList(context)) {
                int cnt = ((List) context).size();
                if (cnt != 0) {
                    throw new TemplateModelException("Cannot perform an XPath query against a node set of " + cnt + " nodes. Expecting a single node.");
                } else {
                    throw new TemplateModelException(ERRMSG_EMPTY_NODE_SET);
                }
            } else {
                throw new TemplateModelException("Cannot perform an XPath query against a " + context.getClass().getName() + ". Expecting a single org.w3c.dom.Node.");
            }
        } else {
            throw new TemplateModelException(ERRMSG_EMPTY_NODE_SET);
        }
    }
    Node node = (Node) context;
    try {
        XPath xpath = new XPath(xpathQuery, null, customPrefixResolver, XPath.SELECT, null);
        int ctxtNode = xpathContext.getDTMHandleFromNode(node);
        XObject xresult = xpath.execute(xpathContext, ctxtNode, customPrefixResolver);
        if (xresult instanceof XNodeSet) {
            NodeListModel result = new NodeListModel(node);
            result.xpathSupport = this;
            NodeIterator nodeIterator = xresult.nodeset();
            Node n;
            do {
                n = nodeIterator.nextNode();
                if (n != null) {
                    result.add(n);
                }
            } while (n != null);
            return result.size() == 1 ? result.get(0) : result;
        }
        if (xresult instanceof XBoolean) {
            return ((XBoolean) xresult).bool() ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
        }
        if (xresult instanceof XNull) {
            return null;
        }
        if (xresult instanceof XString) {
            return new SimpleScalar(xresult.toString());
        }
        if (xresult instanceof XNumber) {
            return new SimpleNumber(Double.valueOf(((XNumber) xresult).num()));
        }
        throw new TemplateModelException("Cannot deal with type: " + xresult.getClass().getName());
    } catch (TransformerException te) {
        throw new TemplateModelException(te);
    }
}

Example 2 with XNull

use of org.apache.xpath.objects.XNull in project j2objc by google.

the class FuncExtFunction method execute.

/**
 * Execute the function.  The function must return
 * a valid object.
 * @param xctxt The current execution context.
 * @return A valid XObject.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    if (xctxt.isSecureProcessing())
        throw new javax.xml.transform.TransformerException(XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED, new Object[] { toString() }));
    XObject result;
    Vector argVec = new Vector();
    int nArgs = m_argVec.size();
    for (int i = 0; i < nArgs; i++) {
        Expression arg = (Expression) m_argVec.elementAt(i);
        XObject xobj = arg.execute(xctxt);
        /*
       * Should cache the arguments for func:function
       */
        xobj.allowDetachToRelease(false);
        argVec.addElement(xobj);
    }
    // dml
    ExtensionsProvider extProvider = (ExtensionsProvider) xctxt.getOwnerObject();
    Object val = extProvider.extFunction(this, argVec);
    if (null != val) {
        result = XObject.create(val, xctxt);
    } else {
        result = new XNull();
    }
    return result;
}

Example 3 with XNull

use of org.apache.xpath.objects.XNull in project robovm by robovm.

the class FuncExtFunction method execute.

/**
   * Execute the function.  The function must return
   * a valid object.
   * @param xctxt The current execution context.
   * @return A valid XObject.
   *
   * @throws javax.xml.transform.TransformerException
   */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
    if (xctxt.isSecureProcessing())
        throw new javax.xml.transform.TransformerException(XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED, new Object[] { toString() }));
    XObject result;
    Vector argVec = new Vector();
    int nArgs = m_argVec.size();
    for (int i = 0; i < nArgs; i++) {
        Expression arg = (Expression) m_argVec.elementAt(i);
        XObject xobj = arg.execute(xctxt);
        /*
       * Should cache the arguments for func:function
       */
        xobj.allowDetachToRelease(false);
        argVec.addElement(xobj);
    }
    //dml
    ExtensionsProvider extProvider = (ExtensionsProvider) xctxt.getOwnerObject();
    Object val = extProvider.extFunction(this, argVec);
    if (null != val) {
        result = XObject.create(val, xctxt);
    } else {
        result = new XNull();
    }
    return result;
}