在父节点中搜索属性并获取子节点属性的值

Question

Short version:

Search for attribute in parent-node and get attribute-values of child-nodes.

---

Long version:

I have the following part of a xml-File:

<include template="directory/file.xml">
        <param name="permission" value="permission_value"/>
        <param name="path" value="path_value"/>
</include>

I check the whole file with the xPath-request "//include[@template]" and recive a nodelist . Now I want to look for the <param name="XXX" value="XXX_value"/> nodes, which are the childs of my xPath-result-nodes.

[initialize xPath before...]

String expression ="//include[@template]";                                                                          
NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(xmlDocument, XPathConstants.NODESET);

if(nodeList.getLength()>0)
{
   for(int i=0; i<nodeList.getLength(); i++)
   {
      NodeList childList = nodeList.item(i).getChildNodes();

      for(int k=0; k<childList.getLength(); k++)
      {         
        // System.out.println(childList.item(k).getNodeName()); --> prints "#text" 

        String name = childList.item(k).getAttributes().getNamedItem("name").toString().replace("\"", "").replace("name=", "");
        String value = childList.item(k).getAttributes().getNamedItem("value").toString().replace("\"", "").replace("value=", "");

        System.out.println("Key: "+key+" Value: "+value);
      }
   }
}

But this code doesn´t work for me beacause currently there is no output at all apart of the comment with the "#text" output. Not even "Key: Value: " is printed.

How to get the values of the param -childs if I search for include -nodes ?

Edit 1:

System.out.println(nodeList.getLength());

delivers 1(correct)

but:

System.out.println(childList.getLength()); 

delivers 3 which is very weird

Edit 2:

It seems like if he can´t get the attributes. I tried to get the attributes with

String key = childList.item(k).getAttributes().getNamedItem("name").toString(); and recived a NullPointerException at this line.

Answer 1

String expression ="//include[@template]";                                                                          
NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(xmlDocument, XPathConstants.NODESET);

for(int i=0; i<nodeList.getLength(); i++){
    NodeList childList = nodeList.item(i).getChildNodes();
    for(int k=0; k<childList.getLength(); k++){         
        Node child = childList.item(k);
        if(child instanceof Element){
            Element elem = (Element)child;
            if("param".equals(elem.getLocalName())){
                String name = elem.getAttribute("name");
                String value = elem.getAttribute("value");
                System.out.println("Name: "+name+" Value: "+value);
            }
        }
    }
}