[SalesForce] how to parse XML file having nested tags using XmlStreamReader

As per the Apex documentation here, you use the getAttributeLocalName method to determine this, but only on start element or attribute element events. Adapting the sample given in the documentation you can see this method in action below.

while(reader.hasNext()) {
    if (reader.getEventType() == XmlTag.START_ELEMENT) {
        if ('UDF' == reader.getLocalName()) {
            System.debug(reader.getAttributeValue(null, 'name'));
        }
    }
    reader.next();
} 

Text Handling. If you want to retrieve the test content of an element, you need to call getText() but only hasTest() returns true, e.g. when getEventType() == XmlTag.Characters. The documentation states that hasText() returns true and thus getText() works only when...

Returns true if the current event has text, false otherwise The following XML events have text: characters, entity reference, comment and space.

@Yash Mehta I think you should try using xml dom reader class which would help you to iterate all requistions nodes instead of the first one. I think your code is just looping through the first node. So here is what you can do.

1. Try to read the xml and load it on a DOM XML node.

2. Iterate through the node for the child elements and get the values you want. sample code to load xml to dom node

   private DOM.Xmlnode  loadXmlFromStaticResource()
   {
     DOM.Xmlnode root;
     StaticResource sr = [select Body from StaticResource where Name =:XML_STATIC_RESOURCE];
     String xmlContent = sr.Body.toString();
     DOM.Document doc = new DOM.Document();
     try 
     {
       doc.load(xmlContent);    
       root = doc.getRootElement();        
     } 
     catch (System.XMLException e) 
     {  // invalid XML
       System.debug('Exception in parsing xml '+e);
     }
   
     return root;         
   }
   

Iterate through the node and get all elements..

    screenDriverNode = this.loadXmlFromStaticResource();
    //get Module Node and key value
    moduleNode = screenDriverNode.getChildElement(this.module,null);

    System.debug('node name for screen driver node'+screenDriverNode.getName());

    System.debug('node name for module node'+moduleNode.getName() + 'module'+this.module);
    System.debug('applicationId passed in populatescreenfrom xml method '+applicationId);
    lstScreenItemNode = moduleNode.getChildElements();

    for (Dom.XMLNode screenItemNode: lstscreenItemNode) 
    {
        screenItemSeq = screenItemNode.getChildElement(SCREEN_ITEM_DISP_SEQ, null).getText();
        screenId = screenItemNode.getChildElement(SCREEN_ITEM_SCREEN_ID, null).getText();
        //renderScreen = screenItemNode.getChildElement(SCREEN_ITEM_RENDER_SCREEN, null).getText();
        //isQuestionPage = screenItemNode.getChildElement(SCREEN_ITEM_IS_QUESTION, null).getText();
        status = screenItemNode.getChildElement(SCREEN_ITEM_STATUS, null).getText();
    }

This is just a sample code. You can search for reading xml through xml dom class and this should help. Please select like or answered if you like my answer.