sending an xml node value with empty /null returning null pointer exception.

Question

I was using READYAPI 2.8.2 version.&nbsp;xml creation failing  An error occurred in the script of the Groovy Script test step [XMLCreation]:18:25:22,339 ERROR [errorlog] java.lang.NullPointerExceptionjava.lang.NullPointerException: null	at org.apache.xml.serializer.TreeWalker.dispatachChars(TreeWalker.java:244) ~[xalan-2.7.0.jar:?]	Ex: I tried this its giving error&lt;eiTarget&gt;&lt;groupID&gt;&lt;/groupID&gt;&lt;resourceID&gt;&lt;/resourceID&gt;&lt;venID&gt;Smud PROD VEN&lt;/venID&gt;&lt;partyID&gt;&lt;/partyID&gt;&lt;/eiTarget&gt;i have also tried &lt;eiTarget&gt;&lt;groupID/&gt;&lt;resourceID/&gt;&lt;venID/&gt;&lt;partyID/&gt;&lt;/eiTarget&gt;I need some help because i need to pass the xml with null node.&nbsp;

tanyayatskovska · Answer

Hi harry,
&nbsp;
I'm not a groovy expert. My first expectation would be to check if the object isn't null. something like:
if (obj!null)

' do something
or use try/catch.

richie · Answer

Hey harry,Do you mean empty or null?Theyre 2 different thingsYouve tried both options for empty elements, so im assuming you dont mean empty.Is your xml schema validated?  What does the schema actually indicate for the elements you need 'null'?Does it have minOccurs and nill or nillable attributes?Need to know exactly what is says in your schema to answer your question.  If minOccurs="0" and nillable="true", this is the only way you can have null.CheersRich

harry · Answer

sorry for confusion i need to send empty value for the node "<ns3:marketContext>".I have shared my source code .

Ex:- Here iam sharing my full xml. I want to assign nil for the <marketcontext node value.Please take a look .

ex:-

<eiMarketContext>
<ns3:marketContext>http://tempuri.org/15403281</ns3:marketContext>
</eiMarketContext>

harry · Answer

import com.eviware.soapui.model.testsuite.TestRunner.Status
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import java.io.*;

def tC = testRunner.getTestCase();
def tS = tC.getTestSuite();
def tP = tS.getProject();
def randomNumber = Math.random();

def callTSname = tC.getPropertyValue("sName");
def callTCname = tC.getPropertyValue("tName");

def callTC = tP.getTestSuiteByName(callTSname).getTestCaseByName(callTCname);

String oldtext = "";
	
	 try {
		DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
		DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

// oadrEvent
		Document doc = docBuilder.newDocument();

Element rootElements =  doc.createElement("ns6:oadrDistributeEvent");
		rootElements.setAttribute("xmlns:ns6", "http://openadr.org/oadr-2.0a/2012/07");
		rootElements.setAttribute("xmlns:ns2", "http://docs.oasis-open.org/ns/energyinterop/201110/payloads");
		rootElements.setAttribute("xmlns", "http://docs.oasis-open.org/ns/energyinterop/201110");
		rootElements.setAttribute("xmlns:ns4", "urn:ietf:params:xml:ns:icalendar-2.0");
		rootElements.setAttribute("xmlns:ns3", "http://docs.oasis-open.org/ns/emix/2011/06");
		rootElements.setAttribute("xmlns:ns5", "urn:ietf:params:xml:ns:icalendar-2.0:stream");
		doc.appendChild(rootElements);

for(def i=1;i&lt;=Integer.valueOf(callTC.getPropertyValue("EventNumber"));i++)

{
			if(i==1)
			{
		//eiResponse
		Element eiResponse = doc.createElement("eiResponse");
		rootElements.appendChild(eiResponse);
		
		//responseCode
		Element responseCode = doc.createElement("responseCode");
		responseCode.appendChild(doc.createTextNode(callTC.getPropertyValue("RESPONSECODE")));
		eiResponse.appendChild(responseCode);
		
		//responseDescription
		Element responseDescription = doc.createElement("responseDescription");
		responseDescription.appendChild(doc.createTextNode("OK"));
		eiResponse.appendChild(responseDescription);

//requestID
		Element requestID = doc.createElement("ns2:requestID");
		requestID.appendChild(doc.createTextNode(callTC.getPropertyValue("REQUESTID")));
		eiResponse.appendChild(requestID);

callTC.setPropertyValue("RequestIDFirst",callTC.getPropertyValue("REQUESTID"));
		
		//requestID1
		Element requestID1 = doc.createElement("ns2:requestID");
		requestID1.appendChild(doc.createTextNode(callTC.getPropertyValue("REQUESTID")));
		rootElements.appendChild(requestID1);

Element vtnID = doc.createElement("vtnID");
		vtnID.appendChild(doc.createTextNode(callTC.getPropertyValue("VTNID")));
		rootElements.appendChild(vtnID);

}
		
		Element rootElement = doc.createElement("ns6:oadrEvent");
		rootElements.appendChild(rootElement);

//Event
		Element event = doc.createElement("eiEvent");
		rootElement.appendChild(event);

// Event Descriptor
		Element eventdescriptor = doc.createElement("eventDescriptor");
		event.appendChild(eventdescriptor);

// Event ID
		Element eventid = doc.createElement("eventID");
		eventid.appendChild(doc.createTextNode(callTC.getPropertyValue("EVENTID_"+i)));
		eventdescriptor.appendChild(eventid);

// modificationNumber
		Element modificationNumber = doc.createElement("modificationNumber");
		modificationNumber.appendChild(doc.createTextNode(callTC.getPropertyValue("MODIFICATION_NO_"+i)));
		eventdescriptor.appendChild(modificationNumber);

// priority
		Element priority = doc.createElement("priority");
		priority.appendChild(doc.createTextNode(callTC.getPropertyValue("PRIORITY_"+i)));
		eventdescriptor.appendChild(priority);

//MarketContext
		Element eiMarketContext = doc.createElement("eiMarketContext");
		eventdescriptor.appendChild(eiMarketContext);

// MarketContext
		Element marketcontext = doc.createElement("ns3:marketContext");
		marketcontext.appendChild(doc.createTextNode(callTC.getPropertyValue("MARKETCONTEXT_1")));
		eiMarketContext.appendChild(marketcontext);

// createdDateTime
		Element createdDateTime = doc.createElement("createdDateTime");
		createdDateTime.appendChild(doc.createTextNode(callTC.getPropertyValue("CREATEDDATETIME_"+i)));
		eventdescriptor.appendChild(createdDateTime);

// eventStatus
		Element eventStatus = doc.createElement("eventStatus");
		eventStatus.appendChild(doc.createTextNode(callTC.getPropertyValue("EVENTSTATUS_"+i)));
		eventdescriptor.appendChild(eventStatus);

// testEvent
		Element testEvent = doc.createElement("testEvent");
		testEvent.appendChild(doc.createTextNode(callTC.getPropertyValue("TESTEVENT_"+i)));
		eventdescriptor.appendChild(testEvent);

// vtnComment
		Element vtnComment = doc.createElement("vtnComment");
		vtnComment.appendChild(doc.createTextNode(callTC.getPropertyValue("COMMENTS_"+i)));
		eventdescriptor.appendChild(vtnComment);

//eiActivePeriod
		Element eiActivePeriod = doc.createElement("eiActivePeriod");
		event.appendChild(eiActivePeriod);

//properties
		Element properties = doc.createElement("ns4:properties");
		eiActivePeriod.appendChild(properties);

//dtstart
		Element dtstart = doc.createElement("ns4:dtstart");
		properties.appendChild(dtstart);

// date-time
		Element datetime = doc.createElement("ns4:date-time");
		datetime.appendChild(doc.createTextNode(callTC.getPropertyValue("STARTDATETIME_"+i)));
		dtstart.appendChild(datetime);

//dtstart
		Element duration = doc.createElement("ns4:duration");
		properties.appendChild(duration);

// durationsub
		Element durationsub = doc.createElement("ns4:duration");
		durationsub.appendChild(doc.createTextNode(callTC.getPropertyValue("DURATION_"+i)));
		duration.appendChild(durationsub);

//tolerance
		Element tolerance = doc.createElement("ns4:tolerance");
		properties.appendChild(tolerance);

//tolerate
		Element tolerate = doc.createElement("ns4:tolerate");
		tolerance.appendChild(tolerate);

// startafter
		Element startafter = doc.createElement("ns4:startafter");
		startafter.appendChild(doc.createTextNode(callTC.getPropertyValue("STARTAFTER_"+i)));
		tolerate.appendChild(startafter);

//x-eiNotification
		Element eiNotification = doc.createElement("x-eiNotification");
		properties.appendChild(eiNotification);

// duration
		Element durationnotification = doc.createElement("ns4:duration");
		durationnotification.appendChild(doc.createTextNode(callTC.getPropertyValue("NOTIFICATIONDURATION_"+i)));
		eiNotification.appendChild(durationnotification);

//x-eiRampUp
		Element eiRampUp = doc.createElement("x-eiRampUp");
		properties.appendChild(eiRampUp);

// duration
		Element durationrampup = doc.createElement("ns4:duration");
		durationrampup.appendChild(doc.createTextNode(callTC.getPropertyValue("RAMPUPDURATION_"+i)));
		eiRampUp.appendChild(durationrampup);

//x-eiRecovery
		Element eiRecovery = doc.createElement("x-eiRecovery");
		properties.appendChild(eiRecovery);

// duration
		Element durationrecovery = doc.createElement("ns4:duration");
		durationrecovery.appendChild(doc.createTextNode(callTC.getPropertyValue("RECOVERYDURATION_"+i)));
		eiRecovery.appendChild(durationrecovery);

//components
		Element components = doc.createElement("ns4:components");
		components.setAttribute("xsi:nil", "true");
		components.setAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
		eiActivePeriod.appendChild(components);

//eiEventSignals
		Element eiEventSignals = doc.createElement("eiEventSignals");
		event.appendChild(eiEventSignals);

//eiEventSignal
		Element eiEventSignal = doc.createElement("eiEventSignal");
		eiEventSignals.appendChild(eiEventSignal);

//intervals
		Element intervals = doc.createElement("ns5:intervals");
		eiEventSignal.appendChild(intervals);

//interval
		Element interval = doc.createElement("interval");
		intervals.appendChild(interval);

//duration
		Element durationinterval = doc.createElement("ns4:duration");
		interval.appendChild(durationinterval);

// duration
		Element durationintervalsub = doc.createElement("ns4:duration");
		durationintervalsub.appendChild(doc.createTextNode(callTC.getPropertyValue("INTERVALDURATION_"+i)));
		durationinterval.appendChild(durationintervalsub);

//uid
		Element uid = doc.createElement("ns4:uid");
		interval.appendChild(uid);

// text
		Element text = doc.createElement("ns4:text");
		text.appendChild(doc.createTextNode(callTC.getPropertyValue("UID_"+i))); 
		uid.appendChild(text);

//SignalPayload
          Element signalPayload = doc.createElement("signalPayload");
          interval.appendChild(signalPayload);

//PayloadFloat
           Element PayloadFloat = doc.createElement("payloadFloat");
 		 signalPayload.appendChild(PayloadFloat);

// payloadfloatvalue
 		 Element payloadfloatvalue = doc.createElement("value");
 		 payloadfloatvalue.appendChild(doc.createTextNode(callTC.getPropertyValue("PayloadValue_"+i)));
 		 PayloadFloat.appendChild(payloadfloatvalue);

// signalname
		Element signalname = doc.createElement("signalName");
		signalname.appendChild(doc.createTextNode(callTC.getPropertyValue("SIGNALNAME_"+i))); 
		eiEventSignal.appendChild(signalname);

// signalType
  		Element signalType = doc.createElement("signalType");
  		signalType.appendChild(doc.createTextNode(callTC.getPropertyValue("SIGNALTYPE_"+i)));
  		eiEventSignal.appendChild(signalType);

// signalID
		Element signalID = doc.createElement("signalID");
		signalID.appendChild(doc.createTextNode(callTC.getPropertyValue("SIGNALID_"+i)));
		eiEventSignal.appendChild(signalID);

// currentValue
  		Element currentValue = doc.createElement("currentValue");
  		eiEventSignal.appendChild(currentValue);

//currentPayloadFloat
  		Element currentPayloadFloat = doc.createElement("payloadFloat");
  		currentValue.appendChild(currentPayloadFloat);

// currentpayloadfloatvalue
  		Element currentpayloadfloatvalue = doc.createElement("value");
  		currentpayloadfloatvalue.appendChild(doc.createTextNode(callTC.getPropertyValue("CurrentPayloadValue_"+i)));
  		currentPayloadFloat.appendChild(currentpayloadfloatvalue);

//eiTarget
		Element eiTarget = doc.createElement("eiTarget");
		event.appendChild(eiTarget);

Element groupID = doc.createElement("groupID"); 
		groupID.appendChild(doc.createTextNode(callTC.getPropertyValue("GROUPID")));
		eiTarget.appendChild(groupID);
		
		//Resource Id
          log.info "The value for the Resource Id is : : :"+callTC.getPropertyValue("ResourceId")
          log.info "The Integer Value is "+Integer.valueOf(callTC.getPropertyValue("ResourceId"));
          for(def j=1;j&lt;=Integer.valueOf(callTC.getPropertyValue("ResourceId"));j++)
          {
		Element resourceID = doc.createElement("resourceID"); 
		resourceID.appendChild(doc.createTextNode(callTC.getPropertyValue("RESOURCEID_"+j)));
		eiTarget.appendChild(resourceID);
          }

// venID
		Element venID = doc.createElement("venID"); 
		venID.appendChild(doc.createTextNode(callTC.getPropertyValue("VENID_"+i)));
		eiTarget.appendChild(venID);

Element partyID = doc.createElement("partyID"); 
		partyID.appendChild(doc.createTextNode(callTC.getPropertyValue("PARTYID")));
		eiTarget.appendChild(partyID);

// oadrResponseRequired
		Element oadrResponseRequired = doc.createElement("ns6:oadrResponseRequired"); 
		oadrResponseRequired.appendChild(doc.createTextNode(callTC.getPropertyValue("OADRRESPONSEREQUIRED_"+i)));
		rootElement.appendChild(oadrResponseRequired);

}

// write the content into xml file
		TransformerFactory transformerFactory = TransformerFactory.newInstance();
		Transformer transformer = transformerFactory.newTransformer();
		DOMSource source = new DOMSource(doc);

StringWriter stringWriter = new StringWriter();
		StreamResult result = new StreamResult(stringWriter);
		//def testcasename = tC.getName
		StreamResult result1 = new StreamResult(new File(tP.getPropertyValue("BackUpXMLPath")+callTC.getName()+"_"+new Date().format( 'yyyy-MM-dd_hhmms' )+".xml"));
		log.info callTC.getName();
		transformer.transform(source, result1);
		
		transformer.transform(source, result);
		oldtext = stringWriter.toString();

} catch (ParserConfigurationException pce) {
		pce.printStackTrace();
	  } catch (TransformerException tfe) {
		tfe.printStackTrace();
	  }
	log.info oldtext
     String newtext = oldtext.replaceAll(" xmlns="+'"'+'"',""); 
     log.info newtext
     tC.setPropertyValue("GeneratedXML", newtext);
     
     log.info "Extra tags removed"
	
	log.info "XML Created!!!";
	sleep 3000;

tanyayatskovska · Answer

Hi&nbsp;harry,
&nbsp;
As far as I understand, this is the problematic part of the code that throws the error:
// MarketContext
Element marketcontext = doc.createElement("ns3:marketContext");
marketcontext.appendChild(doc.createTextNode(callTC.getPropertyValue("MARKETCONTEXT_1")));
eiMarketContext.appendChild(marketcontext);
&nbsp;
I think it's better to check if the getPropertyValue doesn't return null and assign it to the node only after that. Does it make sense?

Forum Discussion

sending an xml node value with empty /null returning null pointer exception.

8 Replies

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