Parse XML fails with null object dereference

Question

I have below code that fails to execute in developer console, I receive the following error: Attempt to de-reference a null object. Can someone please help here?

Apex class:

public class DomDocument1 {

    public void parseResponseDom(){

       string xml = '<Order>pl.map_00NF0000008ZKQu_012F00000011jfx={\'Lupron Ped Call Plan update\':\'fwAA\'}; pl.vals_00NF0000008ZKQu_012F00000011jfx=[\'N/A\',\'N/A\',\'Include - High\',\'Include - High\',\'Include - Medium\',\'Include - Medium\',\'Include - Low\',\'Include - Low\',\'Remove - Deceased/Retired\',\'Remove - Deceased/Retired\',\'Remove - Moved out\']</Order>';
       Dom.Document doc = new Dom.Document();
       doc.load(xml);

        Dom.XMLNode ordDtls = doc.getRootElement();

        String OrderDetailId= ordDtls.getChildElement('pl.map_00NF0000008ZKQu_012F00000011jfx', null).getText();

        System.debug('OrderDtlID: ' + OrderDetailId);

        for(Dom.XMLNode child : ordDtls.getChildElements()) {
           System.debug(child.getText());
        }
    }
}

Answer 1

I see that your XML string contains one single node, Order, and its content is a JSON string, not having children XML nodes, so you can't invoke getChildElement() with a non-existent subnode.

Try to change xml variable content to:

<Order>
<pl.map_00NF0000008ZKQu_012F00000011jfx>
  {\'Lupron Ped Call Plan update\':\'fwAA\'};
</pl.map_00NF0000008ZKQu_012F00000011jfx>
<pl.vals_00NF0000008ZKQu_012F00000011jfx>
  [\'N/A\',\'N/A\',\'Include - High\',\'Include - High\',\'Include - Medium\',\'Include - Medium\',\'Include - Low\',\'Include - Low\',\'Remove - Deceased/Retired\',\'Remove - Deceased/Retired\',\'Remove - Moved out\']</pl.vals_00NF0000008ZKQu_012F00000011jfx>
</Order>

Remove extra spaces when paste into single quotes - or concatenate pieces as you want - and re-run your code.