Examples of XQueryService

org.exist.xmldb.XQueryService
Execute XQuery expressions on the database. This interface is similar to {@link org.xmldb.api.modules.XPathQueryService}, but provides additional methods to compile an XQuery into an internal representation, which can be executed repeatedly. Since XQuery scripts can be very large, compiling an expression in advance can save a lot of time. @author Wolfgang Meier (wolfgang@exist-db.org)
org.xmldb.api.modules.XQueryService

Examples of org.xmldb.api.modules.XQueryService


            resource = root.createResource("data.xml", "XMLResource");
            resource.setContent(DOCUMENT_CONTENT);
            root.storeResource(resource);


            XQueryService qs = (XQueryService) root.getService("XQueryService", "1.0");
            ResourceSet result = qs.query("if (doc-available('" + testCollection + "/messages.xml')) then doc('" + testCollection + "/messages.xml')/events/event[@id = 'STORE-DOCUMENT']/string(@collection) else ()");
            assertEquals(1, result.getSize());
            assertEquals(testCollection, result.getResource(0).getContent());
        } catch (XMLDBException e) {
            e.printStackTrace();
            fail(e.getMessage());

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Examples of org.xmldb.api.modules.XQueryService


    public File[] generate(org.xmldb.api.base.Collection collection, String xqueryContent) throws SAXException {
        String query = IMPORT + xqueryContent;
        System.out.println("query: " + query);
        try {
            XQueryService service = (XQueryService) collection.getService("XQueryService", "1.0");
            service.declareVariable("filename", "");
            service.declareVariable("count", "0");
            CompiledExpression compiled = service.compile(query);


            for (int i = 0; i < count; i++) {
                generatedFiles[i] = File.createTempFile(prefix, ".xml");


                service.declareVariable("filename", generatedFiles[i].getName());
                service.declareVariable("count", new Integer(i));
                ResourceSet result = service.execute(compiled);


                Writer out = new OutputStreamWriter(new FileOutputStream(generatedFiles[i]), "UTF-8");
                SAXSerializer sax = new SAXSerializer(out, outputProps);
                for (ResourceIterator iter = result.getIterator(); iter.hasMoreResources(); ) {
                    XMLResource r = (XMLResource) iter.nextResource();

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Examples of org.xmldb.api.modules.XQueryService

        final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        final DocumentBuilder builder = factory.newDocumentBuilder();
        final InputSource source = new InputSource(new StringReader(strings));
        final Document doc = builder.parse(source);


        final XQueryService service = (XQueryService) testCollection.getService("XQueryService", "1.0");
        final CompiledExpression expr = service.compile("declare variable $local:node external; $local:node//string");
        service.declareVariable("local:node", doc.getDocumentElement());
        final ResourceSet result = service.execute(expr);
        assertEquals(3, result.getSize());
    }

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Examples of org.xmldb.api.modules.XQueryService

     * >>>>>>> currently this produces variable corruption :
     *       The result is the ancestor <<<<<<<<<<
     */
    @Test
    public void ancestor() throws XMLDBException {
        final XQueryService service =
                storeXMLStringAndGetQueryService("numbers.xml", numbers);


        final String query =
                "let $all_items := /test/item " +


                "(: Note: variable non used but computed anyway :)" +
                "let $unused_variable :=" +
                "  for $one_item in $all_items " +
                "      / ancestor::*  (: <<<<< if you remove this line all is normal :)" +
                "    return 'foo'" +
                "return $all_items";


        final ResourceSet result = service.queryResource("numbers.xml", query );
        assertEquals(4, result.getSize());
    }

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Examples of org.xmldb.api.modules.XQueryService

        assertEquals(4, result.getSize());
    }


    @Test
    public void namespaces() throws XMLDBException {
        final XQueryService service =
                storeXMLStringAndGetQueryService("namespaces.xml", namespaces);


        service.setNamespace("t", "http://www.foo.com");
        service.setNamespace("c", "http://www.other.com");
        ResourceSet result =
                service.queryResource("namespaces.xml", "//t:section");
        assertEquals(1, result.getSize());


        result =
                service.queryResource("namespaces.xml", "/t:test//c:comment");
        assertEquals(1, result.getSize());


        result = service.queryResource("namespaces.xml", "//c:*");
        assertEquals(1, result.getSize());


        result = service.queryResource("namespaces.xml", "//*:comment");
        assertEquals(1, result.getSize());


        result = service.queryResource("namespaces.xml", "namespace-uri(//t:test)");
        assertEquals(1, result.getSize());
        assertEquals("http://www.foo.com", result.getResource(0).getContent().toString());
    }

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Examples of org.xmldb.api.modules.XQueryService

        assertEquals("http://www.foo.com", result.getResource(0).getContent().toString());
    }


    @Test
    public void preserveSpace() throws XMLDBException, IOException, SAXException {
        final XQueryService service =
                storeXMLStringAndGetQueryService("whitespace.xml", ws);


        final ResourceSet result =
                service.queryResource("whitespace.xml", "//text");
        assertEquals(2, result.getSize());


        String item = result.getResource(0).getContent().toString();
        assertXMLEqual("<text> </text>", item);
        item = result.getResource(1).getContent().toString();

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Examples of org.xmldb.api.modules.XQueryService

        assertXMLEqual("<text xml:space=\"default\"/>", item);
    }
    
    @Test
    public void nestedElements() throws XMLDBException {
        final XQueryService service =
                storeXMLStringAndGetQueryService("nested.xml", nested);


        final ResourceSet result = service.queryResource("nested.xml", "//c");
        printResult(result);
        assertEquals(3, result.getSize());
    }

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Examples of org.xmldb.api.modules.XQueryService

//      XPathQueryService service =
//        (XPathQueryService) testCollection.getService(
//          "XPathQueryService",
//          "1.0");
//      ResourceSet result = service.query("//SPEECH[LINE &= 'marriage']");
        final XQueryService service =
                storeXMLStringAndGetQueryService("numbers.xml", numbers);
        final ResourceSet result = service.query("//item/price");


        final Resource r = result.getMembersAsResource();
        final Object rawContent = r.getContent();
        String content = null;
        if(rawContent instanceof File) {

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Examples of org.xmldb.api.modules.XQueryService

        assertTrue("get whole document numbers.xml", m.matches());
    }


    @Test
    public void satisfies() throws XMLDBException {
        final XQueryService service = getQueryService();


        ResourceSet result = queryAndAssert(service,
                "every $foo in (1,2,3) satisfies" +
                "   let $bar := 'baz'" +
                "       return false() ",

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Examples of org.xmldb.api.modules.XQueryService

        assertEquals(query, "false", result.getResource(0).getContent().toString());
    }
    
    @Test
    public void intersect() throws XMLDBException {
        final XQueryService service = getQueryService();


        String query = "()  intersect ()";
        queryAndAssert(service, query, 0, "");


        query = "()  intersect  (1)";

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