Hi James Thank you for your help.
I rebuilt the whole betwixt project but was unfortunately unsuccessful to achieve a better result. I studied your code but did not fully understand the additions. You test to see if the object is null, which it is, an just continues. I get a null pointer exception at exactly the same spot: XMLIntrospector, line 188 bean.getClass(), but 'bean' has the value null and I suppose the exception comes from here. How can I help you with a JUnit test? I have never used JUnit. My project is not secret and I could easily submit my single class, but the frameworks takes time to set up: mySql, Torque, Maverick (Sourceforge), betwixt and Tomcat. /johan James Strachan wrote: > Hi johan > > This looks like some kind of bug. I've just applied a little patch that > should avoid the null pointer exception. See if this helps. If it doesn't > it'd be nice to refactor what you're doing into a JUnit test case we can add > to betwixt to help fix it (and keep it fixed) > > James > ------- > http://radio.weblogs.com/0112098/ > ----- Original Message ----- > From: "Johan Lundberg" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, October 11, 2002 5:12 PM > Subject: [betwixt] NullPointerException > > > Hi > > I am using betwixt in combination with Torque (Turbine DB-layer) in > order to generate XML, which is used for transforming XSL stylesheets to > HTML. > > Somewhere during the process of transforming the Torque beans to XML I > get a NullPointerException from betwixt code. See the short versions of > stack trace and the Log4j DEBUG output below. > > I do not know if the exception is a bug in betwixt since I believe that > betwixt can handle object values that are null. > > Any help would be appreciated. > > /johan > > > > > > java.lang.NullPointerException > at > org.apache.commons.betwixt.XMLIntrospector.introspect(XMLIntrospector.java:1 > 88) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.write(AbstractBeanWriter.ja > va:183) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.writeContent(AbstractBeanWr > iter.java:496) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.writeRestOfElement(Abstract > BeanWriter.java:431) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.write(AbstractBeanWriter.ja > va:414) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.write(AbstractBeanWriter.ja > va:216) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.writeContent(AbstractBeanWr > iter.java:506) > at > org.apache.commons.betwixt.io.AbstractBeanWriter.writeRestOfElement(Abstract > BeanWriter.java:431) > > > > > > 37214 [Thread-4] DEBUG org.apache.commons.betwixt.io.AbstractBeanWriter > - Writing bean graph (qualified name 'value' > > 37214 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > Introspecting... > > 37214 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > [Lorg.apache.torque.om.SimpleKey;@538974 > > 37215 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > Attempting to lookup an XML descriptor for class: class > [Lorg.apache.torque.om.SimpleKey; > > 37226 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > ElementDescriptor[qname=SimpleKey;,class=class > [Lorg.apache.torque.om.SimpleKey;,singular=class > [Lorg.apache.torque.om.SimpleKey;] > > 37231 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > XMLBeanInfo [class=class [Lorg.apache.torque.om.SimpleKey;, > descriptor=ElementDescriptor[qname=SimpleKey;,class=class > [Lorg.apache.torque.om.SimpleKey;,singular=class > [Lorg.apache.torque.om.SimpleKey;]] > > 37243 [Thread-4] DEBUG org.apache.commons.betwixt.io.AbstractBeanWriter > - Writing bean graph (qualified name 'null' > > 37243 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > Introspecting... > > 37244 [Thread-4] DEBUG org.apache.commons.betwixt.XMLIntrospector - > > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > __________________________________________________ > Do You Yahoo!? > Everything you'll ever need on one web page > from News and Sport to Email and Music Charts > http://uk.my.yahoo.com > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> > > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
