Example usage for javax.xml.xpath XPathFactory newInstance

Introduction

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

Prototype

public static XPathFactory newInstance() 

Source Link

Document

Get a new XPathFactory instance using the default object model, #DEFAULT_OBJECT_MODEL_URI , the W3C DOM.

This method is functionally equivalent to:

 newInstance(DEFAULT_OBJECT_MODEL_URI) 

Since the implementation for the W3C DOM is always available, this method will never fail.

Usage

From source file:Main.java

public static Iterable<Node> eval(Node element, String path) throws XPathExpressionException {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    // xpath.setNamespaceContext(new NamespaceContext() {
    ////from  w  w w  .ja va 2 s .c  o m
    // /**
    // * @WARNING this code will work only if the namespace is present at
    // * each node of the xml dom and within the xpath queries.
    // * Otherwise you can fix like that:
    // *
    // * <pre>
    // * // FIXME: this is a
    // * hack!! if ("atom".equals(prefix)) return
    // * "http://www.w3.org/2005/Atom"; but it wont work with
    // * </pre>
    // *
    // * different namespaces
    // * @see
    // javax.xml.namespace.NamespaceContext#getNamespaceURI(java.lang.String)
    // */
    // public String getNamespaceURI(String prefix) {
    // String namespace = DOMUtil.lookupNamespaceURI(node, prefix);
    // return namespace;
    // }
    //
    // public String getPrefix(String namespaceURI) {
    // String prefix = node.lookupPrefix(namespaceURI);
    // return prefix;
    // }
    //
    // public Iterator<?> getPrefixes(final String namespaceURI) {
    // return new Iterator<String>() {
    // String ns = getPrefix(namespaceURI);
    //
    // public boolean hasNext() {
    // return ns != null;
    // }
    //
    // public String next() {
    // String r = ns;
    // ns = null;
    // return r;
    // }
    //
    // public void remove() {
    // }
    //
    // };
    // }
    // });
    XPathExpression expr = xpath.compile(path);
    final NodeList result = (NodeList) expr.evaluate(element, XPathConstants.NODESET);
    return new Iterable<Node>() {
        public Iterator<Node> iterator() {
            return new Iterator<Node>() {
                int len = result.getLength();

                int pos;

                public boolean hasNext() {
                    return pos < len;
                }

                public Node next() {
                    if (pos >= len) {
                        return null;
                    }
                    return result.item(pos++);
                }

                public void remove() {
                    throw new IllegalAccessError();
                }

            };
        }
    };
}

---

From source file:Main.java

public static final String[] executeXPathExpression(InputSource inputSource, String xpathExpression,
        String namespace) throws XPathExpressionException, SAXException, IOException,
        ParserConfigurationException, TransformerException {

    // optional namespace spec: xmlns:prefix:URI
    String nsPrefix = null;//from  w  ww.j av  a2s.  c  o  m
    String nsUri = null;
    if (namespace != null && namespace.startsWith("xmlns:")) {
        String[] nsDef = namespace.substring("xmlns:".length()).split("=");
        if (nsDef.length == 2) {
            nsPrefix = nsDef[0];
            nsUri = nsDef[1];
        }
    }

    // Parse XML to DOM
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    dbFactory.setNamespaceAware(true);
    Document doc = dbFactory.newDocumentBuilder().parse(inputSource);

    // Find nodes by XPATH
    XPathFactory xpFactory = XPathFactory.newInstance();
    XPath xpath = xpFactory.newXPath();

    // namespace?
    if (nsPrefix != null) {
        final String myPrefix = nsPrefix;
        final String myUri = nsUri;
        xpath.setNamespaceContext(new NamespaceContext() {
            public String getNamespaceURI(String prefix) {
                return myPrefix.equals(prefix) ? myUri : null;
            }

            public String getPrefix(String namespaceURI) {
                return null; // we are not using this.
            }

            public Iterator<?> getPrefixes(String namespaceURI) {
                return null; // we are not using this.
            }
        });
    }

    XPathExpression expr = xpath.compile(xpathExpression);
    NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

    List<String> lines = new ArrayList<>();

    for (int i = 0; i < nodes.getLength(); i++) {
        lines.add((indenting(nodes.item(i))));
    }

    return lines.toArray(new String[lines.size()]);

}

---

From source file:Main.java

public static String findInXml(String xml, String xpath) {
    try {/*from ww w.j av a2s . co m*/
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        builder.setEntityResolver(new EntityResolver() {
            @Override
            public InputSource resolveEntity(String publicId, String systemId)
                    throws SAXException, IOException {
                //                    if (systemId.contains("foo.dtd")) {
                return new InputSource(new StringReader(""));
                //                    } else {
                //                        return null;
                //                    }
            }
        });
        Document doc = builder.parse(new InputSource(new ByteArrayInputStream(xml.getBytes("utf-8"))));
        XPathFactory xPathfactory = XPathFactory.newInstance();
        XPathExpression expr = xPathfactory.newXPath().compile(xpath);
        return (String) expr.evaluate(doc, XPathConstants.STRING);
    } catch (Throwable t) {
        throw new RuntimeException(t);
    }
}

---

From source file:Main.java

/**
 * Returns the string value of the named attribute in an XML file at the coordinates specified by the passed XPath expression 
 * @param fileName The file name//from   ww  w .  j ava 2s.  c  om
 * @param xPathExpression The XPath expression
 * @param attributeName The attribute name
 * @return the attribute valye
 */
public static String getAttribute(String fileName, String xPathExpression, String attributeName) {
    try {
        Document document = parseXML(new File(fileName));
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression xpathExpression = xpath.compile(xPathExpression);
        Node node = (Node) xpathExpression.evaluate(document, NODE);
        return getAttributeValueByName(node, attributeName);
    } catch (Exception e) {
        throw new RuntimeException("Failed to extract element from:" + fileName, e);
    }
}

---

From source file:com.thinkbiganalytics.feedmgr.nifi.NifiTemplateParser.java

/**
 * @param nifiTemplate the nifi template xml string
 * @return the name of the template/*from  ww  w  . j a  va  2 s . c o  m*/
 */
public static String getTemplateName(String nifiTemplate)
        throws ParserConfigurationException, XPathExpressionException, IOException, SAXException {

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

    InputSource source = new InputSource(new StringReader(nifiTemplate));
    String name = (String) xpath.evaluate("/template/name", source, XPathConstants.STRING);
    return name;
}

---

From source file:com.github.born2snipe.project.setup.cli.maven.AssertXml.java

public static void assertElementDoesExist(String expectedText, File file, String xpathQuery) {
    try {/*from w  w w.  jav a2  s.  c o  m*/
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document doc = builder.parse(file);

        XPath xPath = XPathFactory.newInstance().newXPath();
        NodeList nodes = (NodeList) xPath.compile(xpathQuery).evaluate(doc, XPathConstants.NODESET);
        for (int i = 0; i < nodes.getLength(); i++) {
            String text = nodes.item(i).getTextContent();
            if (text.equals(expectedText)) {
                Assert.fail("We expected to NOT find " + expectedText);
            }
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:Main.java

private static Node getNodeObject(String xpathString, Document doc) throws XPathExpressionException {
    // Create a xptah object
    //logger.debug("Getting the node by using xpath " + xpathString);
    XPathFactory xpf = XPathFactory.newInstance();
    XPath xpath = xpf.newXPath();
    XPathExpression expr = xpath.compile(xpathString);
    Node node = (Node) expr.evaluate(doc, XPathConstants.NODE);
    //logger.debug("Returning the Node object from xml file");
    return node;/* w  w w.j  a v  a2s.c  o  m*/
}

---

From source file:uk.ac.ebi.intact.dataexchange.psimi.solr.util.IntactSolrUtils.java

public static SchemaInfo retrieveSchemaInfo(SolrServer solrServer) throws IOException {
    SchemaInfo schemaInfo = new SchemaInfo();

    if (solrServer instanceof CommonsHttpSolrServer) {
        final CommonsHttpSolrServer solr = (CommonsHttpSolrServer) solrServer;

        final String url = solr.getBaseURL() + "/admin/file/?file=schema.xml";
        final GetMethod method = new GetMethod(url);
        final int code = solr.getHttpClient().executeMethod(method);

        XPath xpath = XPathFactory.newInstance().newXPath();
        String expression = "/schema/fields/field";
        InputStream stream = method.getResponseBodyAsStream();
        InputSource inputSource = new InputSource(stream);

        try {/* w  w  w  . j a  va2  s. c  o  m*/
            NodeList nodes = (NodeList) xpath.evaluate(expression, inputSource, XPathConstants.NODESET);

            for (int i = 0; i < nodes.getLength(); i++) {
                final String fieldName = nodes.item(i).getAttributes().getNamedItem("name").getNodeValue();
                schemaInfo.addFieldName(fieldName);
            }

        } catch (XPathExpressionException e) {
            e.printStackTrace();
        } finally {
            stream.close();
        }

    } else if (solrServer instanceof HttpSolrServer) {
        final HttpSolrServer solr = (HttpSolrServer) solrServer;

        final String url = solr.getBaseURL() + "/admin/file/?file=schema.xml";
        final HttpUriRequest method = new HttpGet(url);
        final HttpResponse response = solr.getHttpClient().execute(method);

        XPath xpath = XPathFactory.newInstance().newXPath();
        String expression = "/schema/fields/field";
        InputStream stream = response.getEntity().getContent();
        InputSource inputSource = new InputSource(stream);

        try {
            NodeList nodes = (NodeList) xpath.evaluate(expression, inputSource, XPathConstants.NODESET);

            for (int i = 0; i < nodes.getLength(); i++) {
                final String fieldName = nodes.item(i).getAttributes().getNamedItem("name").getNodeValue();
                schemaInfo.addFieldName(fieldName);
            }

        } catch (XPathExpressionException e) {
            e.printStackTrace();
        } finally {
            stream.close();
        }

    } else {
        throw new IllegalArgumentException(
                "Cannot get schema for SolrServer with class: " + solrServer.getClass().getName());
    }

    return schemaInfo;
}

---

From source file:Main.java

static public XPath getXPath() {
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();

    return xpath;
}

---

From source file:Main.java

public static Object getXMLValue(String xml, String xQuery, QName resultType)
        throws XPathExpressionException, IOException, SAXException, ParserConfigurationException {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();

    Document doc = db.parse(new InputSource(new StringReader(xml)));

    XPathFactory xPathfactory = XPathFactory.newInstance();

    XPath xPath = xPathfactory.newXPath();
    XPathExpression xPathExpression = xPath.compile(xQuery);
    return xPathExpression.evaluate(doc, resultType);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »