Simple way to generate XML, parse and retrieve values from XML

Use Case

We usually get a requirement to store Salesforce records in XML format. Later, we may need to parse the XML and retrieve the data from XML and store them into a Map for future use.

Solution

I have created this class to generate some hard coded data. Later through usable parseXML method that has been parsed.

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public class XMLParserClass { public Map<String, String> xmlDataMap = new Map<String,String>(); public String generateXML() { Dom.Document doc = new Dom.Document(); Dom.Xmlnode rootNode = doc.createRootElement('TestReport', null, null); Dom.Xmlnode headerNode = rootNode.addChildElement('header', null, null); //assign header attributes headerNode.setAttribute('id', 'TEST1'); Dom.Xmlnode childNode = headerNode.addChildElement('detail', null, null); childNode.setAttribute('id','CHILD1'); childNode.setAttribute('Amount','1000'); String xmlString = doc.toXmlString(); System.debug('xmlString =' + xmlString); return xmlString; } //generated xml /* <?xml version="1.0" encoding="UTF-8"?> <TestReport> <header id="TEST1"> <detail id="CHILD1" Amount="1000" /> </header> </TestReport> */ public void parserXML(String toParse) { xmlDataMap = new Map<String,String>(); DOM.Document doc = new DOM.Document(); try{ doc.load(toParse); DOM.XMLNode root = doc.getRootElement(); traverseThroughXML(root); }catch(Exception ex){ ApexPages.Message msg = new ApexPages.Message(ApexPages.Severity.Error, ex.getMessage()); ApexPages.addMessage(msg); } } /** * traverseThroughXML * This method traverse through the xml, read the data from XML. * @param * @return void. */ private void traverseThroughXML(DOM.XMLNode node) { if (node.getNodeType() == DOM.XMLNodeType.ELEMENT) { System.debug('node.getName()=' + node.getName()); if(node.getName().equalsIgnoreCase('detail')) { if (node.getAttributeCount() > 0) { xmlDataMap.put(node.getAttributeValue(node.getAttributeKeyAt(0), node.getAttributeKeyNsAt(0)) ,node.getAttributeValue(node.getAttributeKeyAt(1), node.getAttributeKeyNsAt(1))); } } for (Dom.XMLNode child: node.getChildElements()) { traverseThroughXML(child); } } } }

Usage

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XMLParserClass cls = new XMLParserClass(); String xmlStr = cls.generateXML(); cls.parserXML(xmlStr); System.debug(cls.xmlDataMap);

Outcome in Debug Log