OpenSAML user discussion

Hi,
 
I am new to using OpenSAML2 library. I am trying to parse a sample SAML 
response message. I am getting error while calling 
DefaultBootstrap.bootstrap(): (source code attached)
 
Exception in thread "main" java.lang.UnsupportedOperationException: This 
parser does not support specification "null" version "null"
        at 
javax.xml.parsers.DocumentBuilderFactory.setSchema(DocumentBuilderFactory.java:489)
        at 
org.opensaml.xml.parse.BasicParserPool.initializePool(BasicParserPool.java:498)
        at 
org.opensaml.xml.parse.BasicParserPool.<init>(BasicParserPool.java:144)
        at org.opensaml.xml.XMLConfigurator.<init>(XMLConfigurator.java:70)
        at 
org.opensaml.DefaultBootstrap.initializeXMLTooling(DefaultBootstrap.java:131)
        at org.opensaml.DefaultBootstrap.bootstrap(DefaultBootstrap.java:75)
        at com.hcl.fim.core.TestParser.<init>(TestParser.java:37)
        at com.hcl.fim.core.TestParser.main(TestParser.java:80)
 
The exception seems it is raising during initialization of BasicParserpool. 
Particular statement is :
 
newFactory.setSchema(schema);     (BasicParserPool.java:498)

In constructor of BasicParserpool, we are initializing schema attribute of 
BasicParserpool with null. But it is not accepting the null value. Please let 
me know if you have anyidea on this.
 
Classpath while running the program: 
E:/opensaml-2.0-rc3-bin/opensaml/dist/opensaml-trunk-jdk-1.5.jar;.;E:/opensaml-2.0-rc3-bin/opensaml/lib/bcprov-jdk14-138.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/commons-codec-1.3.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/commons-collections-3.1.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/commons-httpclient-3.1.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/commons-lang-2.1.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/jargs-1.0.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/jcl104-over-slf4j-1.5.0.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/joda-time-1.5.2.jar;E:/opensaml-2.0-
rc3-bin/opensaml/lib/not-yet-commons-ssl-0.3.9.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/openws-trunk-jdk-1.5.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/slf4j-api-1.5.0.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/velocity-1.5.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/xmlsec-1.4.1.jar;E:/opensaml-2.0-rc3-bin/opensaml/lib/xmltooling-trunk-jdk-1.5.jar;E:\opensaml-2.0-rc3-bin\opensaml\lib\slf4j-log4j12-1.5.0.jar;E:\opensaml-2.0-rc3-bin\opensaml\lib\log4j-1.2.12.jar
 
Thanks
Koteswararao.
import java.io.ByteArrayInputStream;

import org.opensaml.Configuration;
import org.opensaml.DefaultBootstrap;
import org.opensaml.saml2.core.Response;
import org.opensaml.xml.ConfigurationException;
import org.opensaml.xml.XMLObject;
import org.opensaml.xml.XMLObjectBuilderFactory;
import org.opensaml.xml.io.MarshallerFactory;
import org.opensaml.xml.io.Unmarshaller;
import org.opensaml.xml.io.UnmarshallerFactory;
import org.opensaml.xml.io.UnmarshallingException;
import org.opensaml.xml.parse.BasicParserPool;
import org.opensaml.xml.parse.XMLParserException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class TestParser {
        
    /** Parser manager used to parse XML. */
    protected static BasicParserPool parser;
    
    /** XMLObject builder factory. */
    protected static XMLObjectBuilderFactory builderFactory;

    /** XMLObject marshaller factory. */
    protected static MarshallerFactory marshallerFactory;

    /** XMLObject unmarshaller factory. */
    protected static UnmarshallerFactory unmarshallerFactory;
    
        public TestParser() {
        
                try {
                        DefaultBootstrap.bootstrap();
                } catch (ConfigurationException x) {
                        System.out.println(x.getMessage());
                }
                
        parser = new BasicParserPool();
        parser.setNamespaceAware(true);
        builderFactory = Configuration.getBuilderFactory();
        marshallerFactory = Configuration.getMarshallerFactory();
        unmarshallerFactory = Configuration.getUnmarshallerFactory();
        }
        
    /**
     * Unmarshalls an element file into its SAMLObject.
     * 
     * @param samlMessageStr the string which contains SAMLMessage 
     * 
     * @return the SAMLObject from the file
     */
    protected XMLObject unmarshallElement(String samlMessageStr) {
        try {
            Document doc = parser.parse(new ByteArrayInputStream(
                        samlMessageStr.getBytes()));
            Element samlElement = doc.getDocumentElement();

            Unmarshaller unmarshaller = 
Configuration.getUnmarshallerFactory().getUnmarshaller(samlElement);
            if (unmarshaller == null) {
                System.out.println("Unable to retrieve unmarshaller by DOM 
Element");
            }

            return unmarshaller.unmarshall(samlElement);
        } catch (XMLParserException e) {
                System.out.println("Unable to parse the element " + 
samlMessageStr);
        } catch (UnmarshallingException e) {
                System.out.println("Unmarshalling failed when parsing element 
" + samlMessageStr + ": " + e);
        }

        return null;
    }
    
    public static void main(String[] args) throws Exception {
        String samlMessage = "<samlp:Response 
xmlns:saml=\"urn:oasis:names:tc:SAML:2.0:assertion\" 
xmlns:samlp=\"urn:oasis:names:tc:SAML:2.0:protocol\" 
Consent=\"urn:oasis:names:tc:SAML:2.0:consent:unspecified\" 
Destination=\"http://localhost:7001/sso/ACS\"; 
ID=\"f7d5bb46d92a09984135ebc4d58c3406\" IssueInstant=\"2008-04-02T22:20:42Z\" 
Version=\"2.0\"><saml:Issuer>http://localhost:7001/demo/idp</saml:Issuer><samlp:Status><samlp:StatusCode
 
Value=\"urn:oasis:names:tc:SAML:2.0:status:Success\"></samlp:StatusCode></samlp:Status><saml:Assertion
 ID=\"ac9ceedce6f198866991ca8d08c67fff\" 
IssueInstant=\"2008-04-02T22:20:42Z\" 
Version=\"2.0\"><saml:Issuer>http://localhost:7001/demo/idp</saml:Issuer><saml:Subject><saml:NameID
 Format=\"urn:oasis:names:tc:SAML:2.0:nameid-format:persistent\" 
NameQualifier=\"http://localhost:7001/demo/idp\"; 
SPNameQualifier=\"http://localhost:7001/demo/sp\";>a7dc4d06b65824b9d2139226dbe85a00</saml:NameID><saml:SubjectConfirmation
 
Method=\"urn:oasis:names:tc:SAML:2.0:cm:bearer\"><saml:SubjectConfirmationData
 NotOnOrAfter=\"2008-04-02T22:30:42Z\" 
Recipient=\"http://rsactp82.rsafim1.com:7001/SSO/ACS\";></saml:SubjectConfirmationData></saml:SubjectConfirmation></saml:Subject><saml:Conditions
 NotBefore=\"2008-04-02T22:15:42Z\" 
NotOnOrAfter=\"2008-04-02T22:30:42Z\"><saml:AudienceRestriction><saml:Audience>http://localhost:7001/demo/sp</saml:Audience></saml:AudienceRestriction></saml:Conditions><saml:AuthnStatement
 AuthnInstant=\"2008-04-02T22:20:00Z\" 
SessionIndex=\"ac9ceedce6f198866991ca8d08c67fff\"><saml:SubjectLocality 
Address=\"127.0.0.1\" 
DNSName=\"127.0.0.1\"></saml:SubjectLocality><saml:AuthnContext><saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef></saml:AuthnContext></saml:AuthnStatement></saml:Assertion></samlp:Response>";
        
        Response response = (Response) new 
TestParser().unmarshallElement(samlMessage);
        
        if (response != null) {
                System.out.println("Consent :" + response.getConsent());
                System.out.println("Destination :" + 
response.getDestination());
                System.out.println("ID : " + response.getID());
                System.out.println("InResponseTo :" + 
response.getInResponseTo());
                System.out.println("Signed :" + response.isSigned());
                System.out.println("IssuerInstant :" + 
response.getIssueInstant());
                System.out.println("Issuer :" + 
response.getIssuer().getValue());
        }
    }

}