Thread: wsdl/xsd-problem

i got 2 xsd-files + 1 wsdl. i used jaxb to generate java source files from it. i could read some demo-xmls, so the generation worked fine. then i took the wsdl and tried to generate i'm not really sure what. my knowledge of soap and wsdl is almost zero. i *expected* some java source files that let me access a webservice/soap-thingy without having to open sockets and building request xmls myself, just as if everything was plain java.
but instead, jaxb gave me a "unknown location"-message in the console, and axis2 (wsdl2java) crashed with a nullpointer. i can give you the detailled stacktrace tomorrow if that helps.
the problem is, i have NO clue what might be wrong. is there a tutorial for total newbies out there? where should i begin to look for the reason for the problems?

here's the axis2 error:

log4j:WARN No appenders could be found for logger (org.apache.axis2.description.WSDL11ToAllAxisServi cesBuilder).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationExcept ion: Error parsing WSDL
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine .<init>(CodeGenerationEngine.java:153)
at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.jav a:35)
at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.jav a:24)
Caused by: org.apache.axis2.AxisFault
at org.apache.axis2.AxisFault.makeFault(AxisFault.jav a:430)
at org.apache.axis2.description.WSDL11ToAxisServiceBu ilder.populateService(WSDL11ToAxisServiceBuilder.j ava:396)
at org.apache.axis2.description.WSDL11ToAllAxisServic esBuilder.populateAllServices(WSDL11ToAllAxisServi cesBuilder.java:107)
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine .<init>(CodeGenerationEngine.java:147)
... 2 more
Caused by: java.lang.NullPointerException
at org.apache.axis2.description.WSDL11ToAxisServiceBu ilder.createSchemaForPorttype(WSDL11ToAxisServiceB uilder.java:1544)
at org.apache.axis2.description.WSDL11ToAxisServiceBu ilder.generateWrapperSchema(WSDL11ToAxisServiceBui lder.java:1487)
at org.apache.axis2.description.WSDL11ToAxisServiceBu ilder.populateService(WSDL11ToAxisServiceBuilder.j ava:344)
... 4 more