XPATH readout - HAshmap/Array or Enum

Question

Hi,
I am reading this from my xml file:
<Taxes>
                  <Tax TaxCode="code1" Amount="500.00"/>
                  <Tax TaxCode="code2" Amount="100.00"/>
                  <Tax TaxCode="code3" Amount="100.00"/>
                  <Tax TaxCode="code4" Amount="1000.00"/>
                  <Tax TaxCode="code5" Amount="2000.00"/>
                </Taxes>and am passing the Taxcodes as keys and the Amounts as values into a HashMap.
My Problem is, if there are more than 3 TaxCodes, i have to return the amounts of the "extra" Taxcodes as a summed value and forget about the other taxcodes. Thus leaving me with:
                  <Tax TaxCode="code1" Amount="500.00"/>
                  <Tax TaxCode="code2" Amount="100.00"/>
                  <Tax TaxCode="code3" Amount="3100.00"/>Is Hashmap the way to go here - or is there an easier way?

Answer 1

One simple suggestion now that a look closer at your code is to sum the values before you add them.
Where you have:
// combine the 2 nodeLists into a HashMap
                  for (int i = 0; i < nodes1.getLength(); i++) {
                          taxes.put( nodes.item(i).getNodeValue(), nodes1.item(i).getNodeValue());
                    }Do something along the lines of
        for (int i = 0; i < nodes1.getLength() && (i<2); i++) {
                   taxes.put( nodes.item(i).getNodeValue(), nodes1.item(i).getNodeValue());
        if(nodes1.getLength() >=3){
            int total = 0;
            for (int i = 2; i < nodes1.getLength(); i++) {
                   total += nodes1.item(i).getNodeValue());
            taxes.put( nodes.item(3).getNodeValue(), total);
        }*Note I hardcoded the limit on number of the codes (you might want to replace it), also you will need to convert the node values to numbers in order to sum them.