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bimki
 Post subject: error accessing data
PostPosted: Thu Mar 17, 2005 4:48 pm 
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Joined: Thu Mar 03, 2005 5:01 am
Posts: 33
Location: Wrocław (Poland)
Hi all,

what does this error mean :

Code:
org.hibernate.PropertyAccessException: could not set a field value by reflection setter (here classname)


How can I manage this problem?

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max
 Post subject:
PostPosted: Thu Mar 17, 2005 5:42 pm 
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Posts: 8615
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by making a set that matchs what your mapping states or vice versa.

you have some property listed without having the propper setter.

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bimki
 Post subject:
PostPosted: Thu Mar 17, 2005 5:56 pm 
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i have setter matched to this property. But maybye the problem is, that this setter is for my type (it comes from 1:1 association)?

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max
 Post subject:
PostPosted: Thu Mar 17, 2005 6:13 pm 
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dont understand what you are writing.

but yes - the type must also match.

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bimki
 Post subject:
PostPosted: Thu Mar 17, 2005 6:19 pm 
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max wrote:
you have some property listed without having the propper setter.


I have prooper setter :



Code:
public class Modul extends com.bimki.oo7j.hibernate.om.ElementProjektowy implements java.io.Serializable {

    // Fields   
    private com.bimki.oo7j.hibernate.om.Manual manual;
    private com.bimki.oo7j.hibernate.om.ZestawZlozony glownyZlozony;
    private java.util.Set zestawyZlozone;

(......)

   public void setGlownyZlozony (com.bimki.oo7j.hibernate.om.ZestawZlozony glownyZlozony) {
       this.glownyZlozony = glownyZlozony;
    }


and error :

org.hibernate.PropertyAccessException: could not set a field value by reflection setter of com.bimki.oo7j.hibernate.om.Modul.glownyZlozony

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max
 Post subject:
PostPosted: Thu Mar 17, 2005 6:29 pm 
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Posts: 8615
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show mapping and full stack trace please

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bimki
 Post subject:
PostPosted: Thu Mar 17, 2005 6:34 pm 
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Mapping file :

Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
   <!-- http://hibernate.sourceforge.net/-->
<hibernate-mapping default-access="field">
   <!--Dokument-->
   <class name="com.bimki.oo7j.hibernate.om.Dokument" table="Dokument">
      <id name="id" column="dok_id" type="integer" unsaved-value="null">
         <generator class="foreign">
            <param name="property">czescZlozona</param>
         </generator>
      </id>
      <property name="tekst" column="dok_tekst" type="string" />
      <property name="tytul" column="dok_tytul" type="string" length="40"
         index="IndexDokumentTytul" />
      <!-- relacja 1:1 z czescia zlozona-->
      <one-to-one name="czescZlozona"
         class="com.bimki.oo7j.hibernate.om.CzescZlozona"/>
   </class>
   <!--Manual-->
   <class name="com.bimki.oo7j.hibernate.om.Manual" table="Manual">
      <id name="id" column="man_id" type="integer" unsaved-value="null">
         <generator class="foreign">
            <param name="property">modul</param>
         </generator>
      </id>
      <property name="tytul" column="man_tytul" type="string" length="40" />
      <property name="tekst" column="man_tekst" type="string" />
      <property name="dlugoscTekstu" column="man_dlTekstu" type="integer"
         not-null="true" />
      <!-- relacja 1:1 z modulem -->
      <one-to-one name="modul" class="com.bimki.oo7j.hibernate.om.Modul"/>
   </class>
   <!--Polaczenie-->
   <class name="com.bimki.oo7j.hibernate.om.Polaczenie" table="Polaczenie">
      <id name="id" column="pol_id" type="integer" unsaved-value="null">
         <generator class="increment" />
      </id>
      <property name="dlugosc" column="pol_dlugosc" type="integer"
         not-null="true" />
      <property name="typ" column="pol_typ" type="string" length="10" />
      <!-- relacja 1:m  z czescia Atomowa -->
      <many-to-one name="zatomowej"
         class="com.bimki.oo7j.hibernate.om.CzescAtomowa" column="pol_czaZ"
         />
      <!-- relacja 1:m  z czescia Atomowa -->
      <many-to-one name="doatomowej"
         class="com.bimki.oo7j.hibernate.om.CzescAtomowa" column="pol_czaDo"
         />
   </class>
   <!--Element projektowy-->
   <class name="com.bimki.oo7j.hibernate.om.ElementProjektowy"
      table="ElementProjektowy">
      <id name="id" column="ep_id" type="integer" unsaved-value="null">
         <generator class="increment" />
      </id>
      <property name="typ" column="ep_typ" type="string" length="10" />
      <property name="data" column="ep_data" type="date" not-null="true" />
      <!--Czesc atomowa-->
      <joined-subclass name="com.bimki.oo7j.hibernate.om.CzescAtomowa"
         table="CzescAtomowa">
         <key column="cza_id" />
         <property name="x" column="cza_x" type="integer" not-null="true" />
         <property name="y" column="cza_y" type="integer" not-null="true" />
         <property name="dokId" column="cza_dokId" type="integer"
            not-null="true" />
         <!-- relacja 1:m  z czescia zlozona -->
         <many-to-one name="czescZlozona"
            class="com.bimki.oo7j.hibernate.om.CzescZlozona"
            column="cza_czId" />
         <!-- relacja 1:m  z polaczeniem -->
         <set name="polaczenieDo" lazy="true">
            <key column="cza_zAtomowej" />
            <one-to-many class="com.bimki.oo7j.hibernate.om.Polaczenie" />
         </set>
         <!-- relacja 1:m  z polaczeniem -->
         <set name="polaczenieZ" lazy="true">
            <key column="cza_doAtomowej" />
            <one-to-many class="com.bimki.oo7j.hibernate.om.Polaczenie" />
         </set>
      </joined-subclass>
      <!--Czesc zlozona-->
      <joined-subclass name="com.bimki.oo7j.hibernate.om.CzescZlozona">
         <key column="czz_id"/>
         <!-- relacja m:n  z zestawem podstawowym -->
         <bag name="zestawyPodstawowe" table="CzzZp" lazy="true">
            <key column="CzZp_czzId" />
            <many-to-many
               class="com.bimki.oo7j.hibernate.om.ZestawPodstawowy"
               column="CzZp_zpId" />
         </bag>
         <!-- relacja 1:1  z dokumentem -->
         <one-to-one name="dokument"
            class="com.bimki.oo7j.hibernate.om.Dokument"
            foreign-key="dokument"/>
         <one-to-one name="glownaAtomowa"
            class="com.bimki.oo7j.hibernate.om.CzescAtomowa"/>
         <!-- relacja 1:m  z czescia atomowa -->
         <set name="czesciAtomowe" lazy="true">
            <key column="czz_czaId" />
            <one-to-many class="com.bimki.oo7j.hibernate.om.CzescAtomowa" />
         </set>
      </joined-subclass>
      <!--Modul-->
      <joined-subclass name="com.bimki.oo7j.hibernate.om.Modul">
         <key column="mod_id" />
         <!-- relacja 1:1  z manualem -->
         <one-to-one name="manual"
            class="com.bimki.oo7j.hibernate.om.Manual"
            foreign-key="manual"/>
         <one-to-one name="glownyZlozony"
            class="com.bimki.oo7j.hibernate.om.ZestawZlozony"
            cascade="all"/>
         <set name="zestawyZlozone" lazy="true">
            <key column="mod_id" />
            <one-to-many class="com.bimki.oo7j.hibernate.om.ZestawZlozony"
               />
         </set>
      </joined-subclass>
      <!--Zestaw podstawowy-->
      <joined-subclass name="com.bimki.oo7j.hibernate.om.ZestawPodstawowy">
         <key column="zp_id" />
         <!-- relacja m:n  z czescia zlozona -->
         <bag name="czesciZlozone" table="CzzZp" inverse="true" lazy="true">
            <key column="CzZp_zpId" />
            <many-to-many class="com.bimki.oo7j.hibernate.om.CzescZlozona"
               column="CzZp_czzId" />
         </bag>
      </joined-subclass>
      <!--Zestaw zlozony-->
      <joined-subclass name="com.bimki.oo7j.hibernate.om.ZestawZlozony">
         <key column="zz_id" />
         <!-- relacja 1:m  zmodul -->
         <many-to-one name="modul" class="com.bimki.oo7j.hibernate.om.Modul"
            column="zz_modId" />
         <!-- relacja 1:m  z zestawem zlozonym -->
         <set name="zestawyZlozone" lazy="true">
            <key column="zz_zzId" />
            <one-to-many class="com.bimki.oo7j.hibernate.om.ZestawZlozony"
               />
         </set>
         <set name="zestawyPodstawowe" lazy="true">
            <key column="zz_zpId" />
            <one-to-many
               class="com.bimki.oo7j.hibernate.om.ZestawPodstawowy" />
         </set>
      </joined-subclass>
   </class>
</hibernate-mapping>



full stack trace


Code:
org.hibernate.PropertyAccessException: could not set a field value by reflection setter of com.bimki.oo7j.hibernate.om.Modul.glownyZlozony
   at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:74)
   at org.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:564)
   at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:107)
   at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:428)
   at org.hibernate.loader.Loader.doQuery(Loader.java:390)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:195)
   at org.hibernate.loader.Loader.doList(Loader.java:1360)
   at org.hibernate.loader.Loader.list(Loader.java:1343)
   at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:872)
   at org.hibernate.impl.SessionImpl.find(SessionImpl.java:973)
   at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
   at com.bimki.oo7j.experiments.Hibernate.nawigacja1(Hibernate.java:82)
   at com.bimki.oo7j.experiments.Hibernate.service(Hibernate.java:56)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
   at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
   at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
   at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
   at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
   at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException
   at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
   at java.lang.reflect.Field.set(Unknown Source)
   at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:71)
   ... 36 more


I have this error, when I try to submit "from Modul" HQL Query.


this is (or should be :) ) 1:1 association between Modul and ZestawZlozony classes (bidirectional)

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bimki
 Post subject:
PostPosted: Fri Mar 18, 2005 6:25 pm 
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Joined: Thu Mar 03, 2005 5:01 am
Posts: 33
Location: Wrocław (Poland)
mabye I'll show You how am I going to access the data :

Code:
           
            session = factory.openSession();
            tx = session.beginTransaction();
            time = System.currentTimeMillis();

            Query q = session.createQuery("from Modul");
            q.setMaxResults(1);
            List moduly = null;
            moduly = q.list(); //  <<<<< [b] here exception is thrown [/b]
            tx.commit();



thanks for help!

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max
 Post subject:
PostPosted: Fri Mar 18, 2005 8:20 pm 
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Posts: 8615
Location: Neuchatel, Switzerland (Danish)
hmm....dont know what UnsafeObjectFieldAccessorImpl check since it complains.....

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bimki
 Post subject:
PostPosted: Sun Mar 20, 2005 7:34 am 
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Joined: Thu Mar 03, 2005 5:01 am
Posts: 33
Location: Wrocław (Poland)
can You check if the bidirectional 1:1 association between Modul and CzescZlozona is mapped good?

max wrote:
hmm....dont know what UnsafeObjectFieldAccessorImpl check since it complains.....


Belive me - I tried and din'f found any reason :(

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BorisV5
 Post subject:
PostPosted: Thu Apr 26, 2007 10:35 am 
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Joined: Thu Apr 26, 2007 10:32 am
Posts: 1
Hibernate requires that collection-valued properties be typed to an interface such as java.util.Set or java.util.List and not to an actual implementation such as java.util.HashSet (this is a good practice anyway).

Maybe this is the reason for your exception!
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