XML / String-Problem

1public class XMLfunctions {
2
3 public final static Document XMLfromString(String xml){
4
5 Document doc = null;
6
7 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
8 try {
9
10 DocumentBuilder db = dbf.newDocumentBuilder();
11
12 InputSource is = new InputSource();
13 is.setCharacterStream(new StringReader(xml));
14 doc = db.parse(is);
15
16 } catch (ParserConfigurationException e) {
17 System.out.println("XML parse error: " + e.getMessage());
18 return null;
19 } catch (SAXException e) {
20 System.out.println("Wrong XML file structure: " + e.getMessage());
21 return null;
22 } catch (IOException e) {
23 System.out.println("I/O exeption: " + e.getMessage());
24 return null;
25 }
26
27 return doc;
28
29 }
30
31 /** Returns element value
32 * @param elem element (it is XML tag)
33 * @return Element value otherwise empty String
34 */
35 public final static String getElementValue( Node elem ) {
36 Node kid;
37 if( elem != null){
38 if (elem.hasChildNodes()){
39 for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
40 if( kid.getNodeType() == Node.TEXT_NODE ){
41 return kid.getNodeValue();
42 }
43 }
44 }
45 }
46 return "";
47 }
48
49 public static String getXML(){
50 String line = null;
51
52 try {
53
54 DefaultHttpClient httpClient = new DefaultHttpClient();
55 HttpPost httpPost = new HttpPost("http://....");
56
57 HttpResponse httpResponse = httpClient.execute(httpPost);
58 HttpEntity httpEntity = httpResponse.getEntity();
59 line = EntityUtils.toString(httpEntity);
60
61 } catch (UnsupportedEncodingException e) {
62 line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
63 } catch (MalformedURLException e) {
64 line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
65 } catch (IOException e) {
66 line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
67 }
68
69 return line;
70
71 }
72
73 public static int numResults(Document doc){
74 Node results = doc.getDocumentElement();
75 int res = -1;
76
77 try{
78 res = Integer.valueOf(results.getAttributes().getNamedItem("count").getNodeValue());
79 }catch(Exception e ){
80 res = -1;
81 }
82
83 return res;
84 }
85
86 public static String getValue(Element item, String str) {
87 NodeList n = item.getElementsByTagName(str);
88 return XMLfunctions.getElementValue(n.item(0));
89 }
90}