* XPathAPI xPathAPI = new XPathAPI();
 * NodeList nodes = xPathAPI.selectNodeList(contextNode, "//example");
 * Node singleNode = xPathAPI.selectSingleNode(contextNode, "//example[1]");
 * XPathEvaluationResult<?> result = xPathAPI.eval(contextNode, "count(//example)");
 * }
 * </pre>
 *
 * <p>Note: This class is not thread-safe. Each thread should create its own instance of XPathAPI.</p>
 *
 * @see javax.xml.xpath.XPath

     */
    protected String[] getStringsByXPath(final Document document, final String path) {
        try {
            final XPathEvaluationResult<?> xObj = getXPathAPI().eval(document, path);
            switch (xObj.type()) {
            case BOOLEAN:
                final Boolean b = (Boolean) xObj.value();
                return new String[] { b.toString() };
            case NUMBER:

        for (final Map.Entry<String, String> entry : fieldRuleMap.entrySet()) {
            final String path = entry.getValue();
            try {
                final XPathEvaluationResult<?> xObj = getXPathAPI().eval(document, path);
                switch (xObj.type()) {
                case BOOLEAN:
                    final Boolean b = (Boolean) xObj.value();

                return namespace;
            }
            return "http://crawler.codelibs.org/namespace/" + prefix;
        }

        @Override
        public Iterator<String> getPrefixes(final String val) {
            return null; // not used
        }

        @Override
        public String getPrefix(final String uri) {
            return null; // not used
        }
    }