Hello,
I have a problem with using the queryChain. I could track down the error
to the point, that the generic metadata has no data and so
conversion fails. Thats where the null-pointer comes from.
QueryChain query = new QueryChain();
query.addQuery(new SQLTemplate(Bibtex.class, "select * FROM BIBTEX
WHERE "+type[i]+" REGEXP \""+keyword+"\""));
getDataContext().performQuery(query)
The error-stack:
WARN RequestProcessor: Unhandled Exception thrown: class
java.lang.NullPointerException ERROR [action]: Servlet.service() for
servlet action threw exception java.lang.NullPointerException
at
org.objectstyle.cayenne.access.ObjectResolver.init(ObjectResolver.java:102)
at
org.objectstyle.cayenne.access.ObjectResolver.<init>(ObjectResolver.java:93)
at
org.objectstyle.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:373)
at
org.objectstyle.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:151)
at
org.objectstyle.cayenne.access.DataDomain.onQuery(DataDomain.java:766)
at
org.objectstyle.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:253)
at
org.objectstyle.cayenne.access.DataContextQueryAction.execute(DataContextQueryAction.java:90)
at
org.objectstyle.cayenne.access.DataContext.onQuery(DataContext.java:1422)
at
org.objectstyle.cayenne.access.DataContext.performQuery(DataContext.java:1411)
at dbAccess.DBAccess.findBibtexByRegex(DBAccess.java:95)
On the other hand this works well:
SQLTemplate select = new SQLTemplate(Bibtex.class, "select *
FROM BIBTEX WHERE "+type+" REGEXP \""+keyword+"\"");
getDataContext().performQuery(select);
The problem with this is that if have many items found more than once
that I have to filter out then.
Am I doing somethig wrong or this a known issue?
Regards,
Hannes Janetzek
