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Hi,
I thought I posted this ttopic yesterday - but icant see it in the forum; if it is there I apoligise in advance.
here it is:
Hi,
I got some great help before on this & am hoping for a little direction. I have a class that calculates the tax from an xml like below:
<Taxes>
     <Tax TaxCode='code1' Amount='101.00'/>
     <Tax TaxCode='code2' Amount='102.00'/>
     <Tax TaxCode='code3' Amount='103.00'/>
     <Tax TaxCode='code4' Amount='104.00'/>
     <Tax TaxCode='code5' Amount='105.00'/>
</Taxes>Now, my method below, gets the last 3 values and sums them and applies the code "XT" to it & returns a HashMap that looks like:
{code1 = 101.00, code = 102. 00, XT = 312.00}.
public static HashMap getTaxAmounts(String xml) throws Exception {
          HashMap taxes = new HashMap();
          DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true); // never forget this!
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document doc = builder.parse(xml);
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile("//Tax/@TaxCode");
        Object result = expr.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes = (NodeList) result;
        XPathExpression expr1 = xpath.compile("//Tax/@Amount");
        Object result1 = expr1.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes1 = (NodeList) result1;
        for ( int i = 0; i < nodes1.getLength() && (i<2); i++) {
               taxes.put( nodes.item(i).getNodeValue(), nodes1.item(i).getNodeValue());
                if( nodes1.getLength() >= 3){
                    float total = 0.00f;
                    for ( int i = 2; i < nodes1.getLength(); i++) {
                            total += Float.parseFloat(nodes1.item(i).getNodeValue());
                    String xt = nodes.item(2).getNodeValue();
                    xt = "XT";
                    taxes.put( xt, total);
       return taxes;     
/code]
all that's fine - but now I have to replace the tags in the original XML file so that they look like:<Taxes>
<Tax TaxCode='code1' Amount='101.00'/>
<Tax TaxCode='code2' Amount='102.00'/>
<Tax TaxCode='XT' Amount='312.00'/>
</Taxes>
any ideas how I would this???

Answer 1

what am I doing wrong here? i'm just trying to delete the last 2 Tax nodes? what if I want to replace them with the hashmap values - I can't even get the remove bit working??
public static String buildDom(String xml, HashMap taxes) throws Exception
        String newDocument = xml;
         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        try {
          DocumentBuilder builder = factory.newDocumentBuilder();
          Document document = builder.parse(xml);
          HashMap newMap = getTaxAmounts(dd);
          Element elem = document.getDocumentElement();
          NodeList taxList = elem.getElementsByTagName( "Tax" );
          int count1 = taxList.getLength();
          int count2 = newMap.size();       
          for ( int i = count2; i < count1; i++ ) {
              Element Tax = (Element) taxList.item( i );
              System.err.println("Tax == "+Tax);
              document.removeChild( taxList.item(i));
        } catch (ParserConfigurationException pce) {
            // Parser with specified options can't be built
            pce.printStackTrace();
        return newDocument;
    }