how to get specific node and its childs using node's name and a specific attribute value?

Question

note : i am dealing with xml files that i don't know their structure in advance so i can't use XPath here is an example of my xml files :

<?xml version="1.0" encoding="ISO-8859-1" standalone="yes" ?>
<HWData>
<Header time="2013-05-29T13:39:34" uploaded="true" version="1.0" />
  <NE vendorName="Nokia Siemens Networks" NEId="WBTS-431">
    <EQHO vendorName="Nokia Siemens Networks" equipmentHolderId="173" >
        <UNIT vendorName="N" unitId="16" />
        <UNIT vendorName="NOKIA SIEMENS NETWORKS" unitId="225" />
    </EQHO>
    <EQHO vendorName="NSN" equipmentHolderId="40192" >
        <UNIT vendorName="AR" unitId="40267" />
    </EQHO>
  </NE>
  <NE vendorName="Nokia Siemens Networks" NEId="WBTS-261">
    <EQHO vendorName="Nokia Siemens Networks" equipmentHolderId="132" >
      <EQHO vendorName="Nokia Siemens Networks" equipmentHolderId="132-1">
        <UNIT vendorName="NN" unitId="1621" />
      </EQHO>
    </EQHO>
  </NE>
</HWData>

i want to know if i can use for example node name "NE" and attribute value NEID="WBTS-261" to have the hole as result!

result expected :

<NE vendorName="Nokia Siemens Networks" NEId="WBTS-261">
    <EQHO vendorName="Nokia Siemens Networks" equipmentHolderId="132" >
      <EQHO vendorName="Nokia Siemens Networks" equipmentHolderId="132-1">
        <UNIT vendorName="NN" unitId="1621" />
      </EQHO>
    </EQHO>
</NE>

can someone put me on the right way to do that any example,idea or suggestion will be appreciated.. thank you

There are several possibilities and there are various tools to do this. Maybe first have a look at this http://stackoverflow.com/questions/6828703/what-is-the-difference-between-sax-and-dom and then use a search engine to find what you need. — maraca, May 22 '15 at 00:36

score 1 · Accepted Answer · answered May 25 '15 at 13:23

use this method to the node as string :

 public static String NodeToString(String file,String moid) throws   SAXException, IOException, ParserConfigurationException{
String stringNode="";
InputStream in = new ByteArrayInputStream(file.getBytes("ISO-8859-1"));
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(in);
NodeList nodeList = doc.getElementsByTagName("*");
for (int i = 0; i < nodeList.getLength(); i++) {
    if(nodeList.item(i) instanceof Element && ((Element)nodeList.item(i)).getAttribute("MOID").equalsIgnoreCase(moid)){

try
{

  // Set up the output transformer
  TransformerFactory transfac = TransformerFactory.newInstance();
  Transformer trans = transfac.newTransformer();
  trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
  trans.setOutputProperty(OutputKeys.INDENT, "yes");

  // Print the DOM node

  StringWriter sw = new StringWriter();
  StreamResult result = new StreamResult(sw);
  DOMSource source = new DOMSource(nodeList.item(i));
  trans.transform(source, result);
  stringNode = sw.toString();

  //System.out.println(xmlString);
}
catch (TransformerException e)
{
  e.printStackTrace();
}       


    }
}
return stringNode;

 }

how to get specific node and its childs using node's name and a specific attribute value?

1 Answers1