Example usage for javax.xml.xpath XPath setNamespaceContext

Introduction

In this page you can find the example usage for javax.xml.xpath XPath setNamespaceContext.

Prototype

public void setNamespaceContext(NamespaceContext nsContext);

Source Link

Document

Establish a namespace context.

Usage

From source file:Main.java

public static Object evaluateXpath(String expression, Object node, QName returnType, NamespaceContext nsContext)
        throws XPathExpressionException {
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    if (nsContext != null) {
        xpath.setNamespaceContext(nsContext);
    }/*from w  w w .  ja  v a 2  s  .  c o m*/
    return xpath.evaluate(expression, node, returnType);
    // XPathExpression xpathExpr = xpath.compile(expression);
    // return xpathExpr.evaluate(node, returnType);
}

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From source file:Main.java

/**
 * Construct a xPath expression instance with given expression string and namespace context.
 * If namespace context is not specified a default context is built from the XML node
 * that is evaluated against./*from   w  w  w .ja va  2 s.co  m*/
 * @param xPathExpression
 * @param nsContext
 * @return
 * @throws XPathExpressionException
 */
private static XPathExpression buildExpression(String xPathExpression, NamespaceContext nsContext)
        throws XPathExpressionException {
    XPath xpath = xPathFactory.newXPath();

    if (nsContext != null) {
        xpath.setNamespaceContext(nsContext);
    }

    return xpath.compile(xPathExpression);
}

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From source file:Main.java

/**
 * @return/*from   w w  w .j  a v a 2  s. c  om*/
 */
public static XPath getCruxPagesXPath() {
    XPathFactory factory = XPathFactory.newInstance();
    XPath findPath = factory.newXPath();
    findPath.setNamespaceContext(new NamespaceContext() {
        public String getNamespaceURI(String prefix) {
            if (prefix.equals("c")) {
                return "http://www.cruxframework.org/crux";
            } else if (prefix.equals("v")) {
                return "http://www.cruxframework.org/view";
            }

            return "";
        }

        public String getPrefix(String namespaceURI) {
            if (namespaceURI.equals("http://www.cruxframework.org/crux")) {
                return "c";
            } else if (namespaceURI.equals("http://www.cruxframework.org/view")) {
                return "v";
            }
            return "";
        }

        public Iterator<?> getPrefixes(String namespaceURI) {
            List<String> prefixes = new ArrayList<String>();
            prefixes.add("c");
            prefixes.add("v");

            return prefixes.iterator();
        }
    });

    return findPath;
}

---

From source file:Main.java

public static XPathExpression buildXPath(String path, Map<String, String> map) {
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    if (map != null)
        xpath.setNamespaceContext(new NamespaceContext() {

            public Iterator getPrefixes(String namespaceURI) {
                throw new UnsupportedOperationException();
            }// ww w. j a  va 2 s . c  om

            public String getPrefix(String namespaceURI) {
                throw new UnsupportedOperationException();
            }

            public String getNamespaceURI(String prefix) {
                Objects.requireNonNull(prefix);
                if (map.containsKey(prefix))
                    return map.get(prefix);
                return XMLConstants.NULL_NS_URI;
            }
        });

    try {
        return xpath.compile(path);
    } catch (XPathExpressionException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:Main.java

private static XPath createXPath(NamespaceContext namespaceContext, XPathFunctionResolver functionResolver) {
    XPath xPath = XPathFactory.newInstance().newXPath();
    if (namespaceContext != null) {
        xPath.setNamespaceContext(namespaceContext);
    }/*from  ww w . ja  v  a  2s .  c  o m*/
    if (functionResolver != null) {
        xPath.setXPathFunctionResolver(functionResolver);
    }
    return xPath;
}

---

From source file:Main.java

public static String getProcessIdFromBpmn(final String bpmn) {
    String processId = null;//from w w w  . j  a v a2  s .co m
    try {
        final DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true);
        final Document doc = domFactory.newDocumentBuilder()
                .parse(new ByteArrayInputStream(bpmn.getBytes("UTF-8")));
        final XPath xpath = XPathFactory.newInstance().newXPath();
        xpath.setNamespaceContext(new NamespaceContext() {
            @Override
            public Iterator<?> getPrefixes(final String namespaceURI) {
                // Not used in this context.
                return null;
            }

            @Override
            public String getPrefix(final String namespaceURI) {
                // Not used in this context.
                return null;
            }

            @Override
            public String getNamespaceURI(final String prefix) {
                // Only require the URI for the bpmn2 NS.
                return BPMN2_NAMESPACE_URI;
            }
        });
        final XPathExpression expr = xpath.compile(BPMN_PROCESS_ID_XPATH_EXPR);

        final Node node = (Node) expr.evaluate(doc, XPathConstants.NODE);
        processId = node.getAttributes().getNamedItem(BPMN_PROCESS_ID_ATTR).getNodeValue();
    } catch (final Exception e) {
        e.printStackTrace();
    }
    return processId;
}

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From source file:Main.java

private static XPathExpression createXPathExpression(String expression, NamespaceContext namespaceContext)
        throws XPathExpressionException {
    XPath xpath = getFactory().newXPath();
    if (namespaceContext != null) {
        xpath.setNamespaceContext(namespaceContext);
    }/* w w  w  .  j a v a 2 s .c o m*/
    XPathExpression expr = xpath.compile(expression);
    return expr;
}

---

From source file:Main.java

public static XPathExpression newXPath(String xpath, final Map<String, String> namespaces)
        throws XPathExpressionException {
    final XPath xp = newXPathFactory().newXPath();
    xp.setNamespaceContext(new NamespaceContext() {
        @Override//from  ww w  .j  a v  a 2s .c  o m
        public String getNamespaceURI(String prefix) {
            return namespaces != null ? namespaces.get(prefix) : null;
        }

        @Override
        public String getPrefix(String namespaceURI) {
            if (namespaces == null) {
                return null;
            } else {
                final Iterator i = getPrefixes(namespaceURI);
                if (i.hasNext()) {
                    return (String) i.next();
                } else {
                    return null;
                }
            }
        }

        @Override
        public Iterator getPrefixes(String namespaceURI) {
            if (namespaces == null) {
                return null;
            } else {
                ArrayList<String> list = new ArrayList<String>();
                for (Map.Entry<String, String> entry : namespaces.entrySet()) {
                    if (entry.getValue().equals(namespaceURI)) {
                        list.add(entry.getKey());
                    }
                }
                return list.iterator();
            }
        }
    });
    return xp.compile(xpath);
}

---

From source file:Main.java

private static XPathExpression createXPathExpression(String xpathString) {
    /* XPath *//*from w  w  w  . j  a v a 2  s. co m*/
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    xpath.setNamespaceContext(new NamespaceContext() {

        @Override
        public Iterator<?> getPrefixes(String namespaceURI) {
            throw new RuntimeException();
        }

        @Override
        public String getPrefix(String namespaceURI) {
            throw new RuntimeException();
        }

        @Override
        public String getNamespaceURI(String prefix) {
            if ("ds".equals(prefix)) {
                return XMLSignature.XMLNS;
            } else if ("xades".equals(prefix)) {
                return "http://uri.etsi.org/01903/v1.3.2#";
            } else if ("xades141".equals(prefix)) {
                return "http://uri.etsi.org/01903/v1.4.1#";
            } else if ("xades111".equals(prefix)) {
                return "http://uri.etsi.org/01903/v1.1.1#";
            }
            throw new RuntimeException("Prefix not recognized : " + prefix);
        }
    });
    try {
        XPathExpression expr = xpath.compile(xpathString);
        return expr;
    } catch (XPathExpressionException ex) {
        throw new RuntimeException(ex);
    }

}

---

From source file:Main.java

/**
 * Returns a compiled XPath expression.//w  w  w .j a v a2  s.c o m
 *
 * @param expression                The XPath expression as a String.
 * @param namespaceContext          The namespace context used by the XPath expression.
 * @return                          The compiled XPathExpression.
 * @throws XPathExpressionException If a parsing error occurs.
 */
public static XPathExpression compile(String expression, NamespaceContext namespaceContext)
        throws XPathExpressionException {
    XPath compiler = XPathFactory.newInstance().newXPath();
    if (namespaceContext != null)
        compiler.setNamespaceContext(namespaceContext);
    return compiler.compile(expression);
}

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