java.lang.IllegalArgumentException

[To...@persgroep.be]

Dear all,

I get on exception when using IBATIS on on Oracle database.
I have a table with some fields in it. One of the fields is a number field 
that can contain NULL values. 

I have defined a resultmap with the correct properties tags and also a 
valid result tag that stored its values in the resultmap.

When selecting records where the number field is filled in there is no 
problem, when selecting records where the number fields (which can contain 
NULL values !!) is NULL I get the following exception:

500 Servlet Exception
java.lang.IllegalArgumentException
                 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
                 at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
                 at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                 at java.lang.reflect.Method.invoke(Method.java:585)
                 at 
com.ibatis.sqlmap.engine.accessplan.PropertyAccessPlan.setProperties(PropertyAccessPlan.java:45)
                 at 
com.ibatis.sqlmap.engine.exchange.JavaBeanDataExchange.setData(JavaBeanDataExchange.java:112)
                 at 
com.ibatis.sqlmap.engine.mapping.result.BasicResultMap.setResultObjectValues(BasicResultMap.java:346)
                 at 
com.ibatis.sqlmap.engine.mapping.statement.RowHandlerCallback.handleResultObject(RowHandlerCallback.java:63)
                 at 
com.ibatis.sqlmap.engine.execution.SqlExecutor.handleResults(SqlExecutor.java:395)
                 at 
com.ibatis.sqlmap.engine.execution.SqlExecutor.executeQuery(SqlExecutor.java:185)
                 at 
com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.sqlExecuteQuery(GeneralStatement.java:205)
                 at 
com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:173)
                 at 
com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForList(GeneralStatement.java:123)
                 at 
com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:610)
                 at 
com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:584)
                 at 
com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:101)
                 at 
org.springframework.orm.ibatis.SqlMapClientTemplate$3.doInSqlMapClient(SqlMapClientTemplate.java:245)
                 at 
org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:181)
                 at 
org.springframework.orm.ibatis.SqlMapClientTemplate.executeWithListResult(SqlMapClientTemplate.java:204)
                 at 
org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:243)
                 at 
be.persgroep.prj.hln.common.regio.dao.ibatis.ReactieDAO.getAllReacties(ReactieDAO.java:21)
                 at 
_jsp._regio._regiotest__jsp._jspService(regio/regioTest.jsp:26)
                 at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
                 at com.caucho.jsp.Page.pageservice(Page.java:570)
                 at 
com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:159)
                 at 
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
                 at 
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
                 at 
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:267)
                 at 
com.caucho.server.port.TcpConnection.run(TcpConnection.java:388)
                 at 
com.caucho.util.ThreadPool.runTasks(ThreadPool.java:490)
                 at com.caucho.util.ThreadPool.run(ThreadPool.java:423)
                 at java.lang.Thread.run(Thread.java:595)