import org.w3c.dom.Node;

public class XPathAPI {

    private final XPath xPath;

    public XPathAPI() {
        xPath = createXPath(f -> {});
    }

    public XPath createXPath(final Consumer<XPathFactory> builder) {
        try {
            final XPathFactory factory = XPathFactory.newInstance();
            builder.accept(factory);
            return factory.newXPath();

        }
    }

    protected XPathNodes getNodeList(final Document doc, final String xpath) throws XPathExpressionException {
        final XPath xPathApi = getXPathAPI().createXPath(f -> {});
        xPathApi.setNamespaceContext(new DefaultNamespaceContext(doc.getNodeType() == Node.DOCUMENT_NODE ? doc.getDocumentElement() : doc));
        return xPathApi.evaluateExpression(xpath, doc, XPathNodes.class);