Examples of net.sf.saxon.xpath.XPathEvaluator

net.sf.saxon.xpath.XPathEvaluator

XPathEvaluator provides a simple API for standalone XPath processing (that is, executing XPath expressions in the absence of an XSLT stylesheet). It is an implementation of the JAXP 1.3 XPath interface, with additional methods provided (a) for backwards compatibility (b) to give extra control over the XPath evaluation, and (c) to support XPath 2.0.

It is intended to evolve this so that it only supports the JAXP style of operation. Some of the methods are therefore marked as deprecated in this release, and will be dropped in a future release.

For an alternative XPath API, offering more direct access to Saxon capabilities, see {@link net.sf.saxon.sxpath.XPathEvaluator}.

Note that the XPathEvaluator links to a Saxon {@link Configuration}object. By default a new Configuration is created automatically. In many applications, however, it is desirable to share a configuration. The default configuration is not schema aware. All source documents used by XPath expressions under this evaluator must themselves be built using the Configuration used by this evaluator.
@author Michael H. Kay

            throws TransformerException, TransformerConfigurationException {


        TransformerFactory tfactory = TransformerFactory.newInstance();
        Templates templates = tfactory.newTemplates(new StreamSource(xslID));
        Transformer transformer = templates.newTransformer();
        XPathEvaluator xpath = new XPathEvaluator();
        DocumentInfo doc = (DocumentInfo)xpath.setSource(new SAXSource(new InputSource(sourceID)));
        transformer.transform(doc, new StreamResult(System.out));
    }

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            return prefixes.iterator();
        }
    }


    private void init() throws XPathExpressionException {
        XPathEvaluator xPathEvaluator = new XPathEvaluator();
        xPathEvaluator.setNamespaceContext(XPath2NamespaceContext.INSTANCE);
        xPathExpression = xPathEvaluator.compile(xpathStr);
    }

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        // Give it a Saxon wrapper
        DocumentWrapper docw =
                new DocumentWrapper(doc, sourceID, config);


        // Retrieve all the ITEM elements
        XPathEvaluator xpath = new XPathEvaluator(config);
        XPathExpression exp = xpath.compile("//ITEM");
        List list = (List)exp.evaluate(docw, XPathConstants.NODESET);


        // For each of these, compute an additional attribute


        for (Iterator iter=list.iterator(); iter.hasNext();) {

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            throws TransformerException {


        TransformerFactory tfactory = TransformerFactory.newInstance();
        Templates templates = tfactory.newTemplates(new StreamSource(xslID));
        Transformer transformer = templates.newTransformer();
        XPathEvaluator xpath = new XPathEvaluator(((TransformerFactoryImpl)tfactory).getConfiguration());
        DocumentInfo doc = (DocumentInfo)xpath.setSource(new SAXSource(new InputSource(sourceID)));
        transformer.transform(doc, new StreamResult(System.out));
    }

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            DocumentBuilder docBuilder = dfactory.newDocumentBuilder();
            System.err.println("Using DocumentBuilder " + docBuilder.getClass());


            Document doc = docBuilder.newDocument();


            XPathEvaluator xpath = new XPathEvaluator(((TransformerFactoryImpl)tfactory).getConfiguration());
            DocumentInfo saxonDoc = (DocumentInfo)xpath.setSource(new SAXSource(new InputSource(sourceID)));
            NodeInfo top = (NodeInfo)saxonDoc.iterateAxis(Axis.CHILD, NodeKindTest.ELEMENT).next();


            Node imported = doc.importNode(NodeOverNodeInfo.wrap(top), true);


            // Serialize the output so we can see the import actually worked

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    public static NodeInfo exampleSaxonToSaxon(String sourceID, String xslID)
            throws TransformerException, TransformerConfigurationException,
            IOException, MalformedURLException {


        TransformerFactory tfactory = TransformerFactory.newInstance();
        NodeInfo doc = new XPathEvaluator().setSource(new StreamSource(new File(xslID).toURL().toString()));
        Templates templates = tfactory.newTemplates(doc);
        System.err.println("Stylesheet built OK");


        Transformer transformer = templates.newTransformer();
        doc = new XPathEvaluator().setSource(new StreamSource(new File(sourceID).toURL().toString()));
        System.err.println("Source document built OK");


        TinyBuilder builder = new TinyBuilder();
        transformer.transform(doc, builder);
        System.err.println("Transformation done OK");

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            throws TransformerException, TransformerConfigurationException,
                   SAXException, IOException, ParserConfigurationException,
                   MalformedURLException {


        TransformerFactory tfactory = TransformerFactory.newInstance();
        NodeInfo doc = new XPathEvaluator().setSource(new StreamSource(new File(xslID).toURL().toString()));
        Templates templates = tfactory.newTemplates(doc);
        System.err.println("Stylesheet built OK");


        Transformer transformer = templates.newTransformer();
        XPathEvaluator xpath = new XPathEvaluator();
        xpath.setSource(new StreamSource(new File(sourceID).toURL().toString()));
        NodeInfo node = (NodeInfo)xpath.evaluateSingle("/*/*[1]");


        System.err.println("Source document built OK");


        TinyBuilder builder = new TinyBuilder();
        transformer.transform(node, builder);

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            throws TransformerException, TransformerConfigurationException {


        TransformerFactory tfactory = TransformerFactory.newInstance();
        Templates templates = tfactory.newTemplates(new StreamSource(xslID));
        Transformer transformer = templates.newTransformer();
        XPathEvaluator xpath = new XPathEvaluator();
        DocumentInfo doc = (DocumentInfo)xpath.setSource(new SAXSource(new InputSource(sourceID)));
        transformer.transform(doc, new StreamResult(System.out));
    }

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        // Give it a Saxon wrapper
        DocumentWrapper docw = new DocumentWrapper(doc, sourceID, new Configuration());


        // Retrieve all the ITEM elements
        XPathEvaluator xpath = new XPathEvaluator(docw);
        Iterator iter = xpath.evaluate("//ITEM").iterator();


        // For each of these, compute an additional attribute


        while (iter.hasNext()) {
            //NodeWrapper node = (NodeWrapper)enum.next();

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            // the actual query and serialization.
            System.out.println("Loading classes, parsing " + filename + ", and setting up serializer");


            Object document = null;
            if (objectModel.equals(NamespaceConstant.OBJECT_MODEL_SAXON)) {
                document = new XPathEvaluator().setSource(new StreamSource(new File(filename)));


            } else if (objectModel.equals(XPathConstants.DOM_OBJECT_MODEL)) {
                InputSource in = new InputSource(new FileInputStream(filename));
                DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
                dfactory.setNamespaceAware(true);

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Related Classes of net.sf.saxon.xpath.XPathEvaluator

ApplyXPathJAXP

JDOMExample

net.sf.saxon.AugmentedSource

net.sf.saxon.Configuration

net.sf.saxon.dom.DocumentWrapper

net.sf.saxon.dom.NodeWrapper

net.sf.saxon.event.Stripper

net.sf.saxon.expr.Expression

net.sf.saxon.expr.ExpressionVisitor

net.sf.saxon.expr.XPathContextMajor

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