public ArrayList<Object> GetAnyEntity(String PathXPath) throws JAXBException {
        ArrayList<Object> list = new ArrayList<Object>();
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder builder = domFactory.newDocumentBuilder();
            Document dDoc = builder.parse("Projects//asdad//ProjectDataBase.xml");
            XPath xPath = XPathFactory.newInstance().newXPath();
            NodeList nl = (NodeList)xPath.evaluate("//Project/Layer[@idLayer=2]", dDoc, XPathConstants.NODESET);
            for (int i = 0; i < nl.getLength(); i++) {
                list.add(nl.item(i));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list;
    }

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Project xmlns="http://www.example.org/ProjectDataBase" name="name1" >
    <Layer idLayer="2">
        <LayerName>a</LayerName>
        <Order>2</Order>
        <Visible>false</Visible>
    </Layer>
</Project>

//Project/Layer[@idLayer='2']