Examples of org.jdom2.xpath.XPath

org.jdom2.xpath.XPath
A non-public utility class similar to StringBuilder but optimized for XML parsing where the common case is that you get only one chunk of characters per text section. TextBuffer stores the first chunk of characters in a String, which can just be returned directly if no second chunk is received. Subsequent chunks are stored in a supplemental char array (like StringBuilder uses). In this case, the returned text will be the first String chunk, concatenated with the subsequent chunks stored in the char array. This provides optimal performance in the common case, while still providing very good performance in the uncommon case. Furthermore, avoiding StringBuilder means that no extra unused char array space will be kept around after parsing is through. @author Bradley S. Huffman @author Alex Rosen

    }


    @Override
    protected Source createResponsePayload(MethodParameter returnType, Object returnValue) {
        Element returnedElement = (Element) returnValue;
        return new JDOMSource(returnedElement);
    }

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    @Override
    public final Source invoke(Source request) throws Exception {
        Element requestElement = getDocumentElement(request);
        Element responseElement = invokeInternal(requestElement);
        return responseElement != null ? new JDOMSource(responseElement) : null;
    }

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    {
        StringBuffer sb = new StringBuffer();
        
        try
        {
            XPath xp = XPath.newInstance( ALL_TEXT_NODES );
        
            List nodes = xp.selectNodes(m_document.getDocument());
            
            for( Iterator i = nodes.iterator(); i.hasNext(); )
            {
                Object el = i.next();

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     * @throws JDOMException if elements cannot be parsed correctly
     */
    public boolean isConstrained( String url, Role role ) throws JDOMException
    {
        Element root = m_webxml.getRootElement();
        XPath xpath;
        String selector;


        // Get all constraints that have our URL pattern
        // (Note the crazy j: prefix to denote the 2.4 j2ee schema)
        selector = "//j:web-app/j:security-constraint[j:web-resource-collection/j:url-pattern=\"" + url + "\"]";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_24_NAMESPACE );
        List<?> constraints = xpath.selectNodes( root );


        // Get all constraints that match our Role pattern
        selector = "//j:web-app/j:security-constraint[j:auth-constraint/j:role-name=\"" + role.getName() + "\"]";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_24_NAMESPACE );
        List<?> roles = xpath.selectNodes( root );


        // If we can't find either one, we must not be constrained
        if ( constraints.size() == 0 )
        {
            return false;

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        Set<Role> roles = new HashSet<Role>();
        Element root = webxml.getRootElement();


        // Get roles referred to by constraints
        String selector = "//j:web-app/j:security-constraint/j:auth-constraint/j:role-name";
        XPath xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_24_NAMESPACE );
        List<?> nodes = xpath.selectNodes( root );
        for( Iterator<?> it = nodes.iterator(); it.hasNext(); )
        {
            String role = ( (Element) it.next() ).getTextTrim();
            roles.add( new Role( role ) );
        }


        // Get all defined roles
        selector = "//j:web-app/j:security-role/j:role-name";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_24_NAMESPACE );
        nodes = xpath.selectNodes( root );
        for( Iterator<?> it = nodes.iterator(); it.hasNext(); )
        {
            String role = ( (Element) it.next() ).getTextTrim();
            roles.add( new Role( role ) );
        }

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     * @throws JDOMException if elements cannot be parsed correctly
     */
    public boolean isConstrained( String url, Role role ) throws JDOMException
    {
        Element root = m_webxml.getRootElement();
        XPath xpath;
        String selector;


        // Get all constraints that have our URL pattern
        // (Note the crazy j: prefix to denote the 2.4 j2ee schema)
        selector = "//j:web-app/j:security-constraint[j:web-resource-collection/j:url-pattern=\"" + url + "\"]";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_25_NAMESPACE );
        List<?> constraints = xpath.selectNodes( root );


        // Get all constraints that match our Role pattern
        selector = "//j:web-app/j:security-constraint[j:auth-constraint/j:role-name=\"" + role.getName() + "\"]";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_25_NAMESPACE );
        List<?> roles = xpath.selectNodes( root );


        // If we can't find either one, we must not be constrained
        if ( constraints.size() == 0 )
        {
            return false;

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        Set<Role> roles = new HashSet<Role>();
        Element root = webxml.getRootElement();


        // Get roles referred to by constraints
        String selector = "//j:web-app/j:security-constraint/j:auth-constraint/j:role-name";
        XPath xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_25_NAMESPACE );
        List<?> nodes = xpath.selectNodes( root );
        for( Iterator<?> it = nodes.iterator(); it.hasNext(); )
        {
            String role = ( (Element) it.next() ).getTextTrim();
            roles.add( new Role( role ) );
        }


        // Get all defined roles
        selector = "//j:web-app/j:security-role/j:role-name";
        xpath = XPath.newInstance( selector );
        xpath.addNamespace( "j", J2EE_SCHEMA_25_NAMESPACE );
        nodes = xpath.selectNodes( root );
        for( Iterator<?> it = nodes.iterator(); it.hasNext(); )
        {
            String role = ( (Element) it.next() ).getTextTrim();
            roles.add( new Role( role ) );
        }

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     *            XPath expression
     * @return the list of selected items, which may be of types: {@link Element}, {@link Attribute}, {@link Text},
     *         {@link CDATA}, {@link Comment}, {@link ProcessingInstruction}, Boolean, Double, or String.
     */
    public List<?> selectNodes(final Element element, final String query) {
        final XPath xPathExpression = getXPathExpression(query);


        try {
            return xPathExpression.selectNodes(element);
        } catch (final JDOMException e) {
            e.printStackTrace();
        }
        return Collections.emptyList();
    }

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     * @return the first selected item, which may be of types: {@link Element}, {@link Attribute}, {@link Text},
     *         {@link CDATA}, {@link Comment}, {@link ProcessingInstruction}, Boolean, Double, String, or
     *         <code>null</code> if no item was selected.
     */
    public Object selectSingleNode(final Element element, final String query) {
        final XPath xPathExpression = getXPathExpression(query);


        try {
            return xPathExpression.selectSingleNode(element);
        } catch (final JDOMException e) {
            e.printStackTrace();
        }
        return null;
    }

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        if (_dataCache.getxPathExpressions().containsKey(query)) {
            return _dataCache.getxPathExpressions().get(query);
        }


        XPath xPathExpression = null;
        try {
            xPathExpression = XPath.newInstance(query);
        } catch (final JDOMException e) {
            e.printStackTrace();
        }

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