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From robert burrell donkin <robertburrelldon...@blueyonder.co.uk>
Subject Re: Betwixt: Class cast exception when running example
Date Sun, 17 Apr 2005 17:50:09 GMT
this sound like a problem which was fixed a while ago. please upgrade to
a recent nightly or roll your own from HEAD. 

- robert

On Sun, 2005-04-17 at 09:15 -0700, sol myr wrote:
> Hi,
>  
> As you may have seen, i've run into a similar problem. Was surprised to see the aren't
many mentions of it on the web.
>  
> Just thought I'd mentioned that I've found a temporary workround - at least in my experience,
the problem appears to occur only when BeanReader's Log(ger) is in debug mode ("trace enabled")
. So you may call "BeanReader.setLog()" and give it a Log that doesn't enable tracing [e.g.
make your own implementation of the "Log" interface with  "isTracingEnabled=false". Or create
a  Log4JLogger based on a Logger in Level INFO or WARNING. I expect this can also be controlled
via log4j.properties, but I haven't looked into that last option].
> Worked for me, but I'm still waiting for a better solution :(
>  
>                      Regards
> 
> 
> Volker Augustin <volker.augustin@perfektionismus.de> wrote:
> Hello,
> 
> I am currently trying toget Betwixt to work but always get a long list of 
> exceptions.
> 
> java.lang.ClassCastException: java.lang.Class
> at 
> org.apache.commons.betwixt.io.read.ReadContext.getCurrentElement(ReadContext.java:224)
> at 
> org.apache.commons.betwixt.io.read.BeanBindAction.update(BeanBindAction.java:164)
> at 
> org.apache.commons.betwixt.io.read.BeanBindAction.end(BeanBindAction.java:154)
> at 
> org.apache.commons.betwixt.io.BeanRuleSet$ActionMappingRule.end(BeanRuleSet.java:316)
> at org.apache.commons.digester.Digester.endElement(Digester.java:1067)
> at 
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:633)
> at 
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
> at 
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
> at 
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
> at 
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
> at 
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
> at 
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
> at 
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
> at org.apache.commons.digester.Digester.parse(Digester.java:1610)
> at DigesterTest.extractUsingBetwixt(DigesterTest.java:50)
> at DigesterTest.main(DigesterTest.java:24)
> 
> The code is copied almost 1 to 1 from the examples, just the classes are 
> different. Any ideas what's wrong? 
> 
> Kind regards,
> Volker
> 
> StringReader xmlReader = new StringReader("uid='0' login='A'/>");
> 
> BeanReader beanReader = new BeanReader();
> beanReader.getXMLIntrospector().setAttributesForPrimitives(false);
> beanReader.setMatchIDs(false);
> 
> beanReader.registerBeanClass("user", User.class);
> beanReader.registerBeanClass("users", Users.class);
> 
> Users users = (Users) beanReader.parse(xmlReader);
> 
> 
> 
> Users.java:
> import java.util.*;
> 
> public class Users {
> 
> private Set users = new HashSet();
> 
> public void addUser(User user) {
> users.add(user);
> }
> 
> public User[] getUsers() {
> return (User[]) users.toArray(new User[0]);
> }
> }
> 
> 
> 
> User.java:
> public class User {
> 
> private int uid;
> private String login;
> 
> public User() {}
> 
> public void setUid(int uid) {
> this.uid = uid;
> }
> 
> public void setLogin(String login) {
> this.login = login;
> }
> 
> public int getUid() {
> return uid;
> }
> 
> public String getLogin() {
> return login;
> }
> }
> 
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> 
> 		
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-- 
robert burrell donkin <robertburrelldonkin@blueyonder.co.uk>


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