Example usage for javax.xml.xpath XPathFactory newXPath

List of usage examples for javax.xml.xpath XPathFactory newXPath

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Introduction

In this page you can find the example usage for javax.xml.xpath XPathFactory newXPath.

Prototype

public abstract XPath newXPath();

Source Link

Document

Return a new XPath using the underlying object model determined when the XPathFactory was instantiated.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    String source = "<p xmlns='http://www.java2s.com/nfe' versao='2.00'></p>";

    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();

    NamespaceContext context = new NamespaceContext() {
        String PREFIX = "nfe";
        String URI = "http://www.java2s.com/nfe";

        @Override/*from  w ww . j ava  2  s  . co m*/
        public String getNamespaceURI(String prefix) {
            return (PREFIX.equals(prefix)) ? URI : XMLConstants.NULL_NS_URI;
        }

        @Override
        public String getPrefix(String namespaceUri) {
            return (URI.equals(namespaceUri)) ? PREFIX : XMLConstants.DEFAULT_NS_PREFIX;
        }

        @Override
        public Iterator getPrefixes(String namespaceUri) {
            return Collections.singletonList(this.getPrefix(namespaceUri)).iterator();
        }
    };
    xPath.setNamespaceContext(context);
    InputSource inputSource = new InputSource(new StringReader(source));
    String versao = xPath.evaluate("//nfe:p/@versao", inputSource);
    System.out.println(versao.toString());
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();
    SimpleNamespaceContext nsContext = new SimpleNamespaceContext();
    nsContext.addNamespace("s", "uri:test:schedule");
    xPath.setNamespaceContext(nsContext);

    String result = xPath.evaluate("/s:schedule/@name", new InputSource(new FileReader("t.xml")));
    System.out.println(result);/*from   w  w  w .jav  a 2 s. co  m*/
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(new File("Table.xml"));

    XPathFactory xFactory = XPathFactory.newInstance();
    XPath path = xFactory.newXPath();
    XPathExpression exp = path.compile("/tables/table");
    NodeList nlTables = (NodeList) exp.evaluate(doc, XPathConstants.NODESET);
    for (int tblIndex = 0; tblIndex < nlTables.getLength(); tblIndex++) {
        Node table = nlTables.item(tblIndex);
        Node nAtt = table.getAttributes().getNamedItem("title");
        System.out.println(nAtt.getTextContent());
        exp = path.compile("headings/heading");
        NodeList nlHeaders = (NodeList) exp.evaluate(table, XPathConstants.NODESET);
        Set<String> headers = new HashSet<String>(25);
        for (int index = 0; index < nlHeaders.getLength(); index++) {
            headers.add(nlHeaders.item(index).getTextContent().trim());
        }//from  w w w.ja v  a2s . co  m
        for (String header : headers) {
            System.out.println(header);
        }
        exp = path.compile("tablebody/tablerow");
        NodeList nlRows = (NodeList) exp.evaluate(table, XPathConstants.NODESET);
        for (int index = 0; index < nlRows.getLength(); index++) {
            Node rowNode = nlRows.item(index);
            exp = path.compile("tablecell/item");
            NodeList nlValues = (NodeList) exp.evaluate(rowNode, XPathConstants.NODESET);
            List<String> values = new ArrayList<String>(25);
            for (int valueIndex = 0; valueIndex < nlValues.getLength(); valueIndex++) {
                values.add(nlValues.item(valueIndex).getTextContent().trim());
            }
            for (String value : values) {
                System.out.println(value);
            }
        }
    }
}

From source file:ExtensionFunctionResolver.java

public static void main(String[] args) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();

    // set the NamespaceContext to 
    // org.apache.xalan.extensions.ExtensionNamespaceContext
    xpath.setNamespaceContext(new ExtensionNamespaceContext());

    // set the XPathFunctionResolver to 
    // org.apache.xalan.extensions.XPathFunctionResolverImpl
    xpath.setXPathFunctionResolver(new XPathFunctionResolverImpl());

    Object result = null;//from   ww  w  .ja  v  a2 s  .  c  om
    // Evaluate the XPath expression "math:max(/doc/num)" against 
    // the input document numlist.xml
    InputSource context = new InputSource("numlist.xml");
    result = xpath.evaluate(EXPR1, context, XPathConstants.NUMBER);
    System.out.println(EXPR1 + " = " + result);

    // Evaluate the XPath expression "java:ExtensionTest.test('Bob')"
    result = xpath.evaluate(EXPR2, context, XPathConstants.STRING);
    System.out.println(EXPR2 + " = " + result);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);/*from  w  w w .  j a  v  a2  s.c o  m*/
    DocumentBuilder builder;
    Document doc = null;
    builder = factory.newDocumentBuilder();
    doc = builder.parse("employees.xml");
    // Create XPathFactory object
    XPathFactory xpathFactory = XPathFactory.newInstance();
    // Create XPath object
    XPath xpath = xpathFactory.newXPath();
    String name = getEmployeeNameById(doc, xpath, 4);
    System.out.println("Employee Name with ID 4: " + name);

    List<String> names = getEmployeeNameWithAge(doc, xpath, 30);
    System.out.println("Employees with 'age>30' are:" + Arrays.toString(names.toArray()));

    List<String> femaleEmps = getFemaleEmployeesName(doc, xpath);
    System.out.println("Female Employees names are:" + Arrays.toString(femaleEmps.toArray()));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Main example = new Main();
    example.data.put("France", "Paris");
    example.data.put("Japan", "Tokyo");

    JAXBContext context = JAXBContext.newInstance(Main.class);
    Marshaller marshaller = context.createMarshaller();
    DOMResult result = new DOMResult();
    marshaller.marshal(example, result);

    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();

    Document document = (Document) result.getNode();
    XPathExpression expression = xpath.compile("//map/entry");
    NodeList nodes = (NodeList) expression.evaluate(document, XPathConstants.NODESET);

    expression = xpath.compile("//map");
    Node oldMap = (Node) expression.evaluate(document, XPathConstants.NODE);
    Element newMap = document.createElement("map");

    for (int index = 0; index < nodes.getLength(); index++) {
        Element element = (Element) nodes.item(index);
        newMap.setAttribute(element.getAttribute("key"), element.getAttribute("value"));
    }/* w w w  . j  a  va 2  s. co m*/

    expression = xpath.compile("//map/..");
    Node parent = (Node) expression.evaluate(document, XPathConstants.NODE);
    parent.replaceChild(newMap, oldMap);

    TransformerFactory.newInstance().newTransformer().transform(new DOMSource(document),
            new StreamResult(System.out));
}

From source file:XPathResolver.java

public static void main(String[] args) {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    // Set the NamespaceContext
    xpath.setNamespaceContext(new MyNamespaceContext());
    // Set the function resolver
    xpath.setXPathFunctionResolver(new MyFunctionResolver());
    // Set the variable resolver
    xpath.setXPathVariableResolver(new MyVariableResolver());

    Object result = null;/*from w  ww  . j a  v  a2s . c  o m*/
    try {
        result = xpath.evaluate(EXPR, (Object) null, XPathConstants.NUMBER);
    } catch (Exception e) {
        e.printStackTrace();
    }

    // The evaluation result is 9.0.
    System.out.println("The evaluation result: " + result);
}

From source file:ApplyXPathJAXP.java

public static void main(String[] args) {
    QName returnType = null;//from   w w  w .  j a  va 2s . co m

    if (args.length != 3) {
        System.err.println("Usage: java ApplyXPathAPI xml_file xpath_expression type");
    }

    InputSource xml = new InputSource(args[0]);
    String expr = args[1];

    // set the return type
    if (args[2].equals("num"))
        returnType = XPathConstants.NUMBER;
    else if (args[2].equals("bool"))
        returnType = XPathConstants.BOOLEAN;
    else if (args[2].equals("str"))
        returnType = XPathConstants.STRING;
    else if (args[2].equals("node"))
        returnType = XPathConstants.NODE;
    else if (args[2].equals("nodeset"))
        returnType = XPathConstants.NODESET;
    else
        System.err.println("Invalid return type: " + args[2]);

    // Create a new XPath
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();

    Object result = null;
    try {
        // compile the XPath expression
        XPathExpression xpathExpr = xpath.compile(expr);

        // Evaluate the XPath expression against the input document
        result = xpathExpr.evaluate(xml, returnType);

        // Print the result to System.out.
        printResult(result);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:android.databinding.tool.MakeCopy.java

public static void main(String[] args) {
    if (args.length < 5) {
        System.out.println("required parameters: [-l] manifest adk-dir src-out-dir xml-out-dir "
                + "res-out-dir res-in-dir...");
        System.out.println("Creates an android data binding class and copies resources from");
        System.out.println("res-source to res-target and modifies binding layout files");
        System.out.println("in res-target. Binding data is extracted into XML files");
        System.out.println("and placed in xml-out-dir.");
        System.out.println("  -l          indicates that this is a library");
        System.out.println("  manifest    path to AndroidManifest.xml file");
        System.out.println("  src-out-dir path to where generated source goes");
        System.out.println("  xml-out-dir path to where generated binding XML goes");
        System.out.println("  res-out-dir path to the where modified resources should go");
        System.out.println(/*from w w w.j  a v a2s.  com*/
                "  res-in-dir  path to source resources \"res\" directory. One" + " or more are allowed.");
        System.exit(1);
    }
    final boolean isLibrary = args[0].equals("-l");
    final int indexOffset = isLibrary ? 1 : 0;
    final String applicationPackage;
    final int minSdk;
    final Document androidManifest = readAndroidManifest(new File(args[MANIFEST_INDEX + indexOffset]));
    try {
        final XPathFactory xPathFactory = XPathFactory.newInstance();
        final XPath xPath = xPathFactory.newXPath();
        applicationPackage = xPath.evaluate("string(/manifest/@package)", androidManifest);
        final Double minSdkNumber = (Double) xPath.evaluate("number(/manifest/uses-sdk/@android:minSdkVersion)",
                androidManifest, XPathConstants.NUMBER);
        minSdk = minSdkNumber == null ? 1 : minSdkNumber.intValue();
    } catch (XPathExpressionException e) {
        e.printStackTrace();
        System.exit(6);
        return;
    }
    final File srcDir = new File(args[SRC_INDEX + indexOffset], APP_SUBPATH);
    if (!makeTargetDir(srcDir)) {
        System.err.println("Could not create source directory " + srcDir);
        System.exit(2);
    }
    final File resTarget = new File(args[RES_OUT_INDEX + indexOffset]);
    if (!makeTargetDir(resTarget)) {
        System.err.println("Could not create resource directory: " + resTarget);
        System.exit(4);
    }
    final File xmlDir = new File(args[XML_INDEX + indexOffset]);
    if (!makeTargetDir(xmlDir)) {
        System.err.println("Could not create xml output directory: " + xmlDir);
        System.exit(5);
    }
    System.out.println("Application Package: " + applicationPackage);
    System.out.println("Minimum SDK: " + minSdk);
    System.out.println("Target Resources: " + resTarget.getAbsolutePath());
    System.out.println("Target Source Dir: " + srcDir.getAbsolutePath());
    System.out.println("Target XML Dir: " + xmlDir.getAbsolutePath());
    System.out.println("Library? " + isLibrary);

    boolean foundSomeResources = false;
    for (int i = RES_IN_INDEX + indexOffset; i < args.length; i++) {
        final File resDir = new File(args[i]);
        if (!resDir.exists()) {
            System.out.println("Could not find resource directory: " + resDir);
        } else {
            System.out.println("Source Resources: " + resDir.getAbsolutePath());
            try {
                FileUtils.copyDirectory(resDir, resTarget);
                addFromFile(resDir, resTarget);
                foundSomeResources = true;
            } catch (IOException e) {
                System.err.println("Could not copy resources from " + resDir + " to " + resTarget + ": "
                        + e.getLocalizedMessage());
                System.exit(3);
            }
        }
    }

    if (!foundSomeResources) {
        System.err.println("No resource directories were found.");
        System.exit(7);
    }
    processLayoutFiles(applicationPackage, resTarget, srcDir, xmlDir, minSdk, isLibrary);
}

From source file:com.semsaas.jsonxml.tools.JsonXpath.java

public static void main(String[] args) {
    /*/*  ww  w  .j  av  a2 s . c om*/
     * Process options
     */
    LinkedList<String> files = new LinkedList<String>();
    LinkedList<String> expr = new LinkedList<String>();
    boolean help = false;
    String activeOption = null;
    String error = null;

    for (int i = 0; i < args.length && error == null && !help; i++) {
        if (activeOption != null) {
            if (activeOption.equals("-e")) {
                expr.push(args[i]);
            } else if (activeOption.equals("-h")) {
                help = true;
            } else {
                error = "Unknown option " + activeOption;
            }
            activeOption = null;
        } else {
            if (args[i].startsWith("-")) {
                activeOption = args[i];
            } else {
                files.push(args[i]);
            }
        }
    }

    if (error != null) {
        System.err.println(error);
        showHelp();
    } else if (help) {
        showHelp();
    } else {
        try {
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();

            for (String f : files) {
                System.out.println("*** " + f + " ***");
                try {
                    // Create a JSON XML reader
                    XMLReader reader = XMLReaderFactory.createXMLReader("com.semsaas.jsonxml.JsonXMLReader");

                    // Prepare a reader with the JSON file as input
                    InputStreamReader stringReader = new InputStreamReader(new FileInputStream(f));
                    SAXSource saxSource = new SAXSource(reader, new InputSource(stringReader));

                    // Prepare a DOMResult which will hold the DOM of the xjson
                    DOMResult domResult = new DOMResult();

                    // Run SAX processing through a transformer
                    // (This could be done more simply, but we have here the opportunity to pass our xjson through
                    // an XSLT and get a legacy XML output ;) )
                    transformer.transform(saxSource, domResult);
                    Node dom = domResult.getNode();

                    XPathFactory xpathFactory = XPathFactory.newInstance();
                    for (String x : expr) {
                        try {
                            XPath xpath = xpathFactory.newXPath();
                            xpath.setNamespaceContext(new NamespaceContext() {
                                public Iterator getPrefixes(String namespaceURI) {
                                    return null;
                                }

                                public String getPrefix(String namespaceURI) {
                                    return null;
                                }

                                public String getNamespaceURI(String prefix) {
                                    if (prefix == null) {
                                        return XJSON.XMLNS;
                                    } else if ("j".equals(prefix)) {
                                        return XJSON.XMLNS;
                                    } else {
                                        return null;
                                    }
                                }
                            });
                            NodeList nl = (NodeList) xpath.evaluate(x, dom, XPathConstants.NODESET);
                            System.out.println("-- Found " + nl.getLength() + " nodes for xpath '" + x
                                    + "' in file '" + f + "'");
                            for (int i = 0; i < nl.getLength(); i++) {
                                System.out.println(" +(" + i + ")+ ");
                                XMLJsonGenerator handler = new XMLJsonGenerator();
                                StringWriter buffer = new StringWriter();
                                handler.setOutputWriter(buffer);

                                SAXResult result = new SAXResult(handler);
                                transformer.transform(new DOMSource(nl.item(i)), result);

                                System.out.println(buffer.toString());
                            }
                        } catch (XPathExpressionException e) {
                            System.err.println("-- Error evaluating '" + x + "' on file '" + f + "'");
                            e.printStackTrace();
                        } catch (TransformerException e) {
                            System.err.println("-- Error evaluating '" + x + "' on file '" + f + "'");
                            e.printStackTrace();
                        }
                    }
                } catch (FileNotFoundException e) {
                    System.err.println("File '" + f + "' was not found");
                } catch (SAXException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (TransformerException e) {
                    e.printStackTrace();
                }
            }
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        }
    }
}