How to validate generated XML-Document in Memory by XML-Schema?

Question

Hi all!
I have the following problem:
I am generating a Document using the DOM delivered with Xerces 2.6.2.
Before I'll send the generated xml-document through network to another system I have to check with my xml-schema if the document is correct.
In the DOM-FAQ I found an "example" trying to explain how it should work. But with this example the problems begin.
I am creating my document with this method:
     public void createDocument() {
          myDOM = DOMImplementationImpl.getDOMImplementation();
          doc = myDOM.createDocument("", "documentData", null);
          root = doc.getDocumentElement();
          root.setAttribute(
               "xmlns:xsi",
               "http://www.w3.org/2001/XMLSchema-instance");
          //          root.setAttribute("xsi:noNamespaceSchemaLocation", "myScheme.xsd");
          domConfig = ((DocumentImpl) doc).getDomConfig();
          domConfig.setParameter(
               "schema-location",
               "file:///d:/workspace/XMLProject/WebContent/WEB-INF/myScheme.xsd");
          domConfig.setParameter("error-handler", new EHandler());
          domConfig.setParameter("validate", Boolean.TRUE);
     }In the line getting the domConfig, it is getting differeing to the example: The example is like this:
import org.w3c.dom.Document;
import org.w3c.dom.DOMConfiguration;
import org.w3c.dom.ls.LSParser;
Document document = builder.parseURI("data/personal-schema.xml");
DOMConfiguration config = document.getConfig();
config.setParameter("error-handler",new MyErrorHandler());
config.setParameter("validate", Boolean.TRUE);
document.normalizeDocument();They get the DOM-Configuration from the document-Object, but my document-Object has no "getConfig()" and only after type-casting I get a getDomConfig()-Method to get the configuration.
Then I fill my document and call                
((DocumentImpl) doc).normalizeDocument();When I run my Application I get the following error:
org.w3c.dom.DOMException: FEATURE_NOT_SUPPORTED: The parameter schema-location is recognized but the requested value cannot be set.
     at org.apache.xerces.dom.DOMConfigurationImpl.setParameter(Unknown Source)
     at xmlProject.createDocument(Convert.java:63)
     at xmlProject.Convert.main(Convert.java:154)I tried several ways to get the validation without success.
The next question is how I should refer to my xml-schema (which path) and where to place it relative to my jar I will generate, because I will have no webserver I could place it on.
Has anyone any experience with validating a document created and not placed on disc?
I have also another question to SAX: I read, that it is reading a document without saving it in the memory. I think this means that if I am validating it by SAX it will be read once and for parsing it will be read a second time. If I would transfer the document over an tcp-connection, I only have the document once in my inputstream and after validation it would be consumed I think. But what can I parse then? Or did I missed a detail with the function of the SAX?
Thank you for your help!
Yours
Christian

Answer 1

static final String schemaSource = argv[0];
static final String JAXP_SCHEMA_SOURCE =
"http://java.sun.com/xml/jaxp/properties/schemaSource";
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
factory.setAttribute(JAXP_SCHEMA_SOURCE,
new File(schemaSource));