Question

I’ve got an app that consumes a .NET web service which returns an XML string of data. I’m trying to read this XML and insert it into the local SQLite DB but I’m having some trouble. Here’s a sample of the xml:

<?xml version="1.0" encoding="utf-8" ?> 
<string xmlns="RemoteWebService"><OpenIssues> <Table> <IssueID>15351</IssueID>   <IssueSummary>Computer keeps crashing. This continues to be a problem</IssueSummary> <LocationName>West Side</LocationName> <Status>WIP</Status> <CustomerID>89755</CustomerID> <CustomerName>West Side Computers</CustomerName> <CustomerShortName>WSC</CustomerShortName> <Notes /> <STATUS1>Work In Progress</STATUS1> <SubmittedBy>WSC - Tom Johns</SubmittedBy> <EQ_Replaced>true</EQ_Replaced></Table> </OpenIssues></string> 

Using DOM, I’m trying to parse the results like so:

private void GetLatestData(String response) throws ParserConfigurationException, SAXException, IOException{

    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(new InputSource(new StringReader(response)));

    //Normalize the document.
    doc.getDocumentElement().normalize();

    //Get Root Node.
    NodeList nodeList = doc.getElementsByTagName("Table");
    Node node = nodeList.item(0);

    //Get Child Nodes.
    for(int i = 0; i < node.getChildNodes().getLength(); i++){
        IssueInfo issue = new IssueInfo();
        Node tempNode = node.getChildNodes().item(i);

        if(tempNode.getNodeName().equalsIgnoreCase("IssueID")){
            issue.setIssueNumber(Long.parseLong(tempNode.getTextContent()));
        }

        if(tempNode.getNodeName().equalsIgnoreCase("IssueSummary")){
            issue.setIssueNumber(Long.parseLong(tempNode.getTextContent()));
        }               

        if(issue.getIssueNumber() > 0 && issue.getIssueSummary() != null){
            creator = new IssueInfoCreator(this, DBVersion);
            creator.open();
            creator.InsertIssue(issue.getIssueNumber(), DateFormat.getDateInstance().format(new Date()), issue.getIssueSummary());
            creator.close();
        }
    }
}

When I run it through the debugger, it gets “IssueID” just fine but how can I get it to pickup the next node “IssueSummary” right after that so I can insert the data at once? It seems like I need another loop somewhere, just not too sure where though.

Answer 1

Finally found the resolution to this with the help of my coworker and some digging around. It should be noted that we changed the WebService that returned a string from DataSet.GetXml() to an XmlDocument.InnerXml. This removed the spaces in between the nodes and then we were able to move forward from there. Here’s the final code we used:

public void GetLatestData(SoapPrimitive xml)throws ParserConfigurationException, SAXException, IOException{
    //get the factory
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

    //Using factory get an instance of document builder
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc;

    //parse using builder to get DOM representation of the XML file
    InputSource is = new InputSource(new StringReader(xml.toString()));
    doc = db.parse(is);

   //Clear out Issues table first.
   creator = new IssueInfoCreator(this, DBVersion);
   creator.open();
   creator.ClearIssueTable();
   creator.close();

   NodeList nodes = doc.getElementsByTagName("Table");

   for(int i = 0; i < nodes.getLength(); i++) {
       IssueInfo issue = new IssueInfo();

       Element e = (Element)nodes.item(i);

       issue.setIssueNumber(Long.parseLong(XMLfunctions.getValue(e, "IssueID")));
       issue.setIssueSummary(XMLfunctions.getValue(e, "IssueSummary"));
       issue.setDateReceived(DateFormat.format("MM/dd/yyyy hh:mm:ss", System.currentTimeMillis()).toString());

       if(issue.getIssueNumber() > 0 && issue.getIssueSummary() != null){
           creator = new IssueInfoCreator(this, DBVersion);
           creator.open();
           creator.InsertIssue(issue.getIssueNumber(), issue.getDateReceived(), issue.getIssueSummary());
           creator.close();
       }
   }
}

And here is the getValue method of the XMLfuntions class:

public static String getValue(Element item, String str) {       
    NodeList n = item.getElementsByTagName(str);        
    return XMLfunctions.getElementValue(n.item(0));
}

 public final static String getElementValue( Node elem ) {
     Node kid;
     if( elem != null){
         if (elem.hasChildNodes()){
             for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
                 if( kid.getNodeType() == Node.TEXT_NODE  ){
                     return kid.getNodeValue();
                 }
             }
         }
     }
     return "";
 }

Definately not taking credit for this, I found it here:
Programmer XR and modified it to my needs.

Hopefully this will help other people out!