Avoid empty validation on DropdownByKey

Hi!
How to avoid the unwanted validation of blank entry selection, created by the framework, when rendering a Dropdown on Web Dynpro Mobile?
The problem is:
- We have a Dropdown UI element bounded to a list from BAPI output table;
- On the application, the user selects a value and fires any action, by pressing a button or something;
- Then he remember that this field ought to be empty and select the blank entry;
- On firing any other action, even a roundtrip to the server, a validation occurs, with error message like "Value ' ' not on the enumeration range"...
Is there a solution on this?
Ps: We are using WindowsMobile5 devices.

Quick question, what is supposed to happen if the user never selects anything from the list? Is a selection manditory?

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<pre>
Hi
<b>i have xml document, which is shown below
after removing some nodes from the document ,i am getting empty lines in place of removed nodes,how to resolve this and get the proper xml document without any errors</b>
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE Message SYSTEM "TRD01.dtd">
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<ErrorStatus>1</ErrorStatus>
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<Remarks>REMARSK</Remarks>
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Node node5 = (Node) result5;
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XPathExpression expression6 = xpath.compile(xmlpath6);
Object result6 = expression6.evaluate(doc, XPathConstants.NODE);
Node node6=(Node) result6;
node6.getParentNode().removeChild(node6);
XPathExpression expression7 = xpath.compile(xmlpath7);
Object result7 = expression7.evaluate(doc, XPathConstants.NODE);
Node node7=(Node) result7;
node7.getParentNode().removeChild(node7);
doc.normalize();
doc.normalizeDocument();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty(OutputKeys.INDENT, "yes");
t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
t.setOutputProperty(OutputKeys.METHOD,"xml");
t.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
the xml output i am getting is
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Message>
<Header>
<CounterPartyType>CLIENT</CounterPartyType>
<CreationTime>20134455</CreationTime>
<MessageType>TRD01</MessageType>
<RecipientEnterpriseId>N</RecipientEnterpriseId>
<RecipentSystemId>STL</RecipentSystemId>
<Remarks>REMARSK</Remarks>
<SenderEnterpriseId>N</SenderEnterpriseId>
<SenderSystemId>T</SenderSystemId>
</Header>
</Message>
<b>could you please let me know how to avoid empty lines in the xml doucment output</b>
this is the method i am using to get the result
public void ValidateRecord(String xml){
try{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder db = factory.newDocumentBuilder();
//parse file into DOM
/*DOMParser parser = new DOMParser();
parser.setErrorStream(System.err);
parser.setValidationMode(DTD_validation);
parser.showWarnings(true);*/
System.out.println ("HI THIS xml is validation "+xml);
Resolver res = new Resolver();
db.setEntityResolver(res);
Document doc = db.parse(new InputSource(new StringReader(xml)));
XPathFactory xpf = XPathFactory.newInstance();
XPath xpath = xpf.newXPath();
// XPathExpression expression = xpath.compile("//A/B[C/E/text()=13]");
String xmlpath="/Message/Header/CounterPartyType/text()";
String xmlpath1="/Message/Header/RecipentSystemId/text()";
String xmlpath2="/Message/Header/ErrorSystemId/text()";
XPathExpression expression = xpath.compile(xmlpath);
XPathExpression expression1 = xpath.compile(xmlpath2);
Object result = expression.evaluate(doc, XPathConstants.NODE);
Object result1 = expression1.evaluate(doc, XPathConstants.NODE);
Node node = (Node) result;
Node node1 = (Node) result1;
System.out.println("the values of the string is " +node.getNodeValue());
System.out.println("the values of the string is " +node1.getNodeValue());
// for (int i = 0; i < nodes.getLength(); i++) {
//System.out.println(nodes.item(i).getNodeValue());
// CAHNGING THE RECEIPENT NODE
XPathExpression expression2 = xpath.compile(xmlpath1);
Object result2 = expression2.evaluate(doc, XPathConstants.NODE);
Node node2 = (Node) result2;
System.out.println(node2);
node2.setNodeValue(node1.getNodeValue());
System.out.println(node2);
//removing the nodes from document
String xmlpath3="/Message/Header/ErrorCode";
String xmlpath4="/Message/Header/ErrorEnterPriseId";
String xmlpath5="/Message/Header/ErrorStatus";
String xmlpath6="/Message/Header/ErrorSystemId";
String xmlpath7="/Message/Header/ErrorTimes";
XPathExpression expression3 = xpath.compile(xmlpath3);
Object result3 = expression3.evaluate(doc, XPathConstants.NODE);
Node node3 = (Node) result3;
node3.getParentNode().removeChild(node3);
XPathExpression expression4 = xpath.compile(xmlpath4);
Object result4 = expression4.evaluate(doc, XPathConstants.NODE);
Node node4 = (Node) result4;
System.out.println("node value");
System.out.println(node4.getParentNode().getNodeName());
node4.getParentNode().removeChild(node4);
XPathExpression expression5 = xpath.compile(xmlpath5);
Object result5 = expression5.evaluate(doc, XPathConstants.NODE);
Node node5 = (Node) result5;
node5.getParentNode().removeChild(node5);
XPathExpression expression6 = xpath.compile(xmlpath6);
Object result6 = expression6.evaluate(doc, XPathConstants.NODE);
Node node6=(Node) result6;
node6.getParentNode().removeChild(node6);
XPathExpression expression7 = xpath.compile(xmlpath7);
Object result7 = expression7.evaluate(doc, XPathConstants.NODE);
Node node7=(Node) result7;
node7.getParentNode().removeChild(node7);
// Node b13Node = (Node) expression.evaluate(doc, XPathConstants.NODE);
//b13Node.getParentNode().removeChild(b13Node);
doc.normalize();
doc.normalizeDocument();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty(OutputKeys.INDENT, "yes");
t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
t.setOutputProperty(OutputKeys.METHOD,"xml");
t.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
t.transform(new DOMSource(doc), new StreamResult(System.out));
catch (Exception e) {
e.printStackTrace();
System.out.println(e.getMessage());
</pre>
Edited by: user12185243 on Apr 6, 2013 6:38 AM
Edited by: user12185243 on Apr 6, 2013 6:41 AM
Edited by: user12185243 on Apr 6, 2013 6:43 AM
Edited by: user12185243 on Apr 6, 2013 6:45 AM
Edited by: user12185243 on Apr 6, 2013 9:00 AM

either this way we can do this
1)
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
<b> factory.setIgnoringElementContentWhitespace(true); </b>
DocumentBuilder db = factory.newDocumentBuilder();
or
2)
java.io.StringWriter sw = new java.io.StringWriter();
StreamResult sr = new StreamResult(sw);
t.transform(new DOMSource(doc), sr);
String xml1 = sw.toString().trim();
<b> xml1=xml1.replaceAll("\\s",""); </b>
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Am I barking up the wrong tree and can this be done a lot easier, or what am I missing?
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Edited by: user13805808 on Jan 31, 2011 6:29 AM

Hello Frank,
Thanks for your quick reply.
The application is actually a bounded task flow that is based on a human task. So after selecting the human task, JDev automatically creates a task flow, and the Data Controls required to show, update, reject, approve, ... the task.
What I do next is drag & drop the payload of the task from the Data Control Palette to my page, and I create buttons for all the necessary operations (such as approve, reject, ...), also from the Data Control Palette. If you then deploy the application, it is automatically associated with the human task, and the page is shown in the Worklist application after selecting an instance of the task.
The operation that I am interested in is called "update", which basically, through the ADF Data Control and ADF model, sends the updated fields back to the BPM engine and saves the updated fields there (in memory, or in the DB, I don't know, but this doesn't matter). This operation is provided by default when creating a task flow based on a human task, and works perfectly if there are no required fields, or if all required fields are submitted. So "temporarily" saving the fields is not the issue.
What I want to achieve now, is have some fields that are required when the user clicks "approve" (one of the basic operations on a task), but optional with the user clicks "update" (another basic operation of a task). Approve would make the process itself continue and the task would no longer be assigned to the user. Update on the other hand would just update the payload in the BPM engine, but the task remains assigned to the user and the process doesn't continue. So if the user logs in at some point later in time, this task (with updated fields) will still be available in his inbox.
The first thing I noticed is that client side validation cannot be disabled anymore in ADF 11g, so the "update" button has to be set to immediate to avoid the validation of the required fields at client side. But if the "update" button is immedate, then the update model values phase in the page life cycle is skipped, so the data that the user entered is never submitted to BPM. Whereas if I set the "update" button to immedate="false", this works just fine. If all required fields are entered, that is. :-)
So - in my opinion - there would be 2 possible approaches if there are fields that should be required for the "approve" operation and optional for the "update" operation.
- Disable the client side validation and don't set the update button to immediate
- Make the "update" button immediate, but force the lifecycle to still perform Update Model Values, if the "update" button is used
The second approach would be the cleanest, but I'm unable to figure out how to do this... I'm a little bit lost in all the classes that are available. :-)
I hope this clarifies my problem...
Regards,
Chris
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Error while validating the xml file

Hello All,
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Is anybody having any suggestions for that ?.
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Thanks and regards,
Sachin

Thanks for the prompt help. Is there any other way instead of removing the DTD line ?. Because the xml is coming as a string and removing the dtd and then adding it will unneccesary hamper performance. Do you any other way in which even though I don't remove the line I get the output without removing the dtd line ?.
thanks and regards,
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Avoid empty validation on DropdownByKey

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