OpenSAML user discussion

[Chad La Joie <>]

I don't think the first error you list is an error from the OpenSAML
code.  I just looks like the log message that indicates which parser is
being used.  The null pointer exception is in your code.

Massimiliano Masi wrote:
> Hi all,
> 
> I'm trying to start coding with OpenSAML2. Using the following code
> (taken from an
> email from this list of some months ago):
> 
> 
> 
> 
> 
> package com.prova;
> 
> import java.io.PrintWriter;
> import java.io.StringWriter;
> 
> import org.apache.log4j.Logger;
> import org.opensaml.Configuration;
> import org.opensaml.saml2.core.AuthnStatement;
> import org.opensaml.saml2.core.impl.AuthnStatementBuilder;
> import org.opensaml.saml2.core.validator.AuthnStatementSchemaValidator;
> import org.opensaml.xml.XMLObjectBuilderFactory;
> import org.opensaml.xml.validation.ValidationException;
> 
> 
> public class Prova {
>       public static void main(String args[])
>       {
>               Logger logger = Logger.getLogger (Prova.class);
>               
>               try
>               {
>                       XMLObjectBuilderFactory builderFactory = 
> Configuration.getBuilderFactory ();
>                       AuthnStatementBuilder authnStatementBuilder =
> (AuthnStatementBuilder)builderFactory.getBuilder(AuthnStatement.DEFAULT_ELEMENT_NAME);
> 
>                       AuthnStatement authnStatement = 
> authnStatementBuilder.buildObject ();
> 
>                       logger.debug ("Calling 
> authnStatement.validate(false)");
>                       authnStatement.validate (false);
> 
>                       logger.debug ("Calling AuthnStatementSchemaValidator 
> ().validate");
>                       try
>                       {
>                               new AuthnStatementSchemaValidator ().validate 
> (authnStatement);
>                       }
>                       catch (ValidationException e)
>                       {
>                               logger.debug (e);
>                       }
> 
>                       logger.debug ("Calling 
> authnStatement.validate(true)");
>                       authnStatement.validate (true);
>                       logger.debug ("finished");
>               }
>               catch (NullPointerException e)
>               {
>                       StringWriter sw = new StringWriter ();
>                       e.printStackTrace (new PrintWriter (sw));
>                       logger.debug (sw.toString ());
>                       
>               
> 
>               
>               }
>               catch(ValidationException e)
>               {
>                       e.printStackTrace();
>               }
>               catch(Throwable T)
>               {
>                       T.printStackTrace();
>               }
>       }
> }
> 
> 
> I got the JAXP parser error:
> VM using JAXP parser org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
> org.opensaml.xml.Configuration
> VM using JAXP parser org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
> org.opensaml.xml.Configuration
> java.lang.NullPointerException
>       at com.prova.Prova.main(Prova.java:25)
>  com.prova.Prova
> 
> I have -Djava.endorsed.dirs=/opt/java5/lib/endorsed in eclipse's vm args.
> 
> The endorsed lib is:
> max@fourier
>  /afs/mascanc.net/users/m/max/Desktop $ ls /opt/java5/lib/endorsed/
> total 6.6M
> -rw-r--r-- 1 root root  83K Aug 22 19:03 resolver.jar
> -rw-r--r-- 1 root root 272K Aug 22 19:03 serializer.jar
> -rw-r--r-- 1 root root 3.0M Aug 22 19:08 xalan.jar
> -rw-r--r-- 1 root root 1.2M Aug 22 19:03 xercesImpl.jar
> -rw-r--r-- 1 root root 162K Aug 22 19:03 xercesSamples.jar
> -rw-r--r-- 1 root root 190K Aug 22 19:03 xml-apis.jar
> -rw-r--r-- 1 root root 1.8M Aug 22 19:08 xsltc.jar
> 
> 
> (latest download of xerces and xalan)
> 
> If the endorsed directory is wrong the error message become:
> 
> 
> VM using JAXP parser
> com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl
> org.opensaml.xml.Configuration
> VM using JAXP parser
> com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl
> org.opensaml.xml.Configuration
> 
> 
> 
> OpenSAML requires an xml parser that supports JAXP 1.3 and DOM3.
> The JVM is currently configured to use the Sun XML parser, which is known
> to be buggy and can not be used with OpenSAML.  Please endorse a functional
> JAXP library(ies) such as Xerces and Xalan.  For instructions on how to 
> endorse
> a new parser see 
> http://java.sun.com/j2se/1.5.0/docs/guide/standards/index.html
> 
> 
>  org.opensaml.xml.Configuration
> 
> 
> 
> 
> I don't have the Configuration.init() since is not in the
> opensaml-2.0-alpha1-jdk1.5.jar.
> 
> 
> 
> 
> Do you have any hints?
> 
> 
> Thanks,
> 
> 
>                                                Massimiliano
> 
> 
> 
> 
> PS: Sorry if you receive multiple message. My university mailserver
> doesn't work properly
> 

-- 
Chad La Joie             2052-C Harris Bldg
OIS-Middleware           202.687.0124