Examples of net.sf.saxon.s9api.XPathCompiler

net.sf.saxon.s9api.XPathCompiler
An XPathCompiler object allows XPath queries to be compiled. The compiler holds information that represents the static context for an XPath expression.
To construct an XPathCompiler, use the factory method {@link Processor#newXPathCompiler}.

An XPathCompiler may be used repeatedly to compile multiple queries. Any changes made to the XPathCompiler (that is, to the static context) do not affect queries that have already been compiled. An XPathCompiler may be used concurrently in multiple threads, but it should not then be modified once initialized.

Changes to an XPathCompiler are cumulative. There is no simple way to reset the XPathCompiler to its initial state; instead, simply create a new XPathCompiler.
@since 9.0

        super.run();


        XdmNode sdoc = source.read();
        XdmNode adoc = alternate.read();


        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
        xcomp.declareVariable(doca);
        xcomp.declareVariable(docb);


        XPathExecutable xexec = xcomp.compile("deep-equal($doca,$docb)");
        XPathSelector selector = xexec.load();


        selector.setVariable(doca,sdoc);
        selector.setVariable(docb,adoc);

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        }
    }


    public static boolean xpathEqual(Processor proc, XdmItem a, XdmItem b) {
        try {
            XPathCompiler c = proc.newXPathCompiler();
            c.declareVariable(vara);
            c.declareVariable(varb);


            XPathExecutable xexec = c.compile("$vara = $varb");
            XPathSelector selector = xexec.load();


            selector.setVariable(vara,a);
            selector.setVariable(varb,b);

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                }


                localBindings = nsv.getNamespaceBindings();
            } else if (nsbinding.getXPath() != null) {
                try {
                    XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
                    xcomp.setBaseURI(step.getNode().getBaseURI());


                    for (QName varname : globals.keySet()) {
                        xcomp.declareVariable(varname);
                    }


                    // Make sure the namespace bindings for evaluating the XPath expr are correct
                    // FIXME: Surely there's a better way to do this?
                    Hashtable<String,String> lclnsBindings = new Hashtable<String, String>();
                    NodeInfo inode = nsbinding.getNode().getUnderlyingNode();
                    NamePool pool = inode.getNamePool();
                    InscopeNamespaceResolver inscopeNS = new InscopeNamespaceResolver(inode);
                    Iterator<?> pfxiter = inscopeNS.iteratePrefixes();
                    while (pfxiter.hasNext()) {
                        String nspfx = (String)pfxiter.next();
                        String nsuri = inscopeNS.getURIForPrefix(nspfx, "".equals(nspfx));
                        lclnsBindings.put(nspfx, nsuri);
                    }


                    for (String prefix : lclnsBindings.keySet()) {
                        xcomp.declareNamespace(prefix, lclnsBindings.get(prefix));
                    }


                    XPathExecutable xexec = xcomp.compile(nsbinding.getXPath());
                    XPathSelector selector = xexec.load();


                    for (QName varname : globals.keySet()) {
                        XdmAtomicValue avalue = new XdmAtomicValue(globals.get(varname).getString());
                        selector.setVariable(varname,avalue);

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                boundOpts.put(name, v);
            }
        }


        try {
            XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
            URI baseURI = step.getNode().getBaseURI();
            if (baseURI == null || !baseURI.isAbsolute())  {
                if (runtime.getBaseURI() != null) {
                    xcomp.setBaseURI(runtime.getBaseURI().resolve(baseURI));
                }
            } else {
                xcomp.setBaseURI(baseURI);
            }


            for (QName varname : boundOpts.keySet()) {
                xcomp.declareVariable(varname);
            }


            for (String prefix : nsBindings.keySet()) {
                xcomp.declareNamespace(prefix, nsBindings.get(prefix));
            }
            XPathExecutable xexec = null;
            try {
                xexec = xcomp.compile(xpath);
            } catch (SaxonApiException sae) {
                Throwable t = sae.getCause();
                if (t instanceof XPathException) {
                    XPathException xe = (XPathException) t;
                    if (xe.getMessage().contains("Undeclared (or unbound?) variable")) {

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        source.resetReader();


        DocumentSequenceIterator xsi = new DocumentSequenceIterator(); // See below
        xsi.setLast(count);


        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
        xcomp.setBaseURI(step.getNode().getBaseURI());


        for (String prefix : test.getNamespaceBindings().keySet()) {
            xcomp.declareNamespace(prefix, test.getNamespaceBindings().get(prefix));
        }


        XPathExecutable xexec = xcomp.compile(test.getString());


        // From Michael Kay: http://markmail.org/message/vkb2vaq2miylgndu
        //
        // Underneath the s9api XPathExecutable is a net.sf.saxon.sxpath.XPathExpression.

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    public void processAttribute(XdmNode node) throws SaxonApiException {
        throw XProcException.stepError(23);
    }


    private String computedLabel(XdmNode node) throws SaxonApiException {
        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
        xcomp.setBaseURI(step.getNode().getBaseURI());


        // Make sure any namespace bindings in-scope for the label are available for the expression
        for (String prefix : label.getNamespaceBindings().keySet()) {
            xcomp.declareNamespace(prefix, label.getNamespaceBindings().get(prefix));
        }
        xcomp.declareVariable(p_index);


        XPathExecutable xexec = xcomp.compile(label.getString());
        XPathSelector selector = xexec.load();


        selector.setVariable(p_index,new XdmAtomicValue(count++));


        selector.setContextItem(node);

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                        for (XStep step : subpipeline) {
                            step.reset();
                        }


                        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
                        xcomp.declareVariable(doca);
                        xcomp.declareVariable(docb);


                        XPathExecutable xexec = xcomp.compile("deep-equal($doca,$docb)");
                        XPathSelector selector = xexec.load();


                        selector.setVariable(doca, is_doc);
                        selector.setVariable(docb, os_doc);

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                        result.fail(null, pdoc);
                    } else {
                        XdmNode tdoc = pexp.get(pos);
                        XdmNode pdoc = pres.get(pos);


                        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
                        xcomp.declareVariable(doca);
                        xcomp.declareVariable(docb);


                        XPathExecutable xexec = xcomp.compile("deep-equal($doca,$docb)");
                        XPathSelector selector = xexec.load();


                        selector.setVariable(doca,tdoc);
                        selector.setVariable(docb,pdoc);

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        return false;
    }


    private XdmItem computeGroup(XdmNode node) {
        try {
            XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
            xcomp.setBaseURI(step.getNode().getBaseURI());


            for (String prefix : groupAdjacent.getNamespaceBindings().keySet()) {
                xcomp.declareNamespace(prefix, groupAdjacent.getNamespaceBindings().get(prefix));
            }


            XPathExecutable xexec = xcomp.compile(groupAdjacent.getString());
            XPathSelector selector = xexec.load();
            selector.setContextItem(node);


            Iterator<XdmItem> values = selector.iterator();
            if (values.hasNext()) {

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        }


        Vector<XdmNode> selectedNodes = new Vector<XdmNode> ();


        XPathSelector selector = null;
        XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
        for (String prefix : nsBindings.keySet()) {
            xcomp.declareNamespace(prefix, nsBindings.get(prefix));
        }


        try {
            XPathExecutable xexec = xcomp.compile(select);
            selector = xexec.load();
        } catch (SaxonApiException sae) {
            throw new XProcException(sae);
        }

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