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Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 1 post ] 
Author Message
 Post subject: fetching data through collection
PostPosted: Tue Oct 09, 2007 9:32 am 
Newbie

Joined: Tue Oct 09, 2007 9:19 am
Posts: 3
hi

I am stuck with a problem on retrieving datas through Collection and am
unable to solve it .






Configuration conf=new Configuration().addResource("Mapping/person.hbm.xml");
SessionFactory sf=conf.buildSessionFactory();
Session sess=sf.openSession();

Transaction tr=sess.beginTransaction();
Person p1=(Person)sess.get(Person.class,new Long(4));

Set s=p1.getAddress()//this method is supposed to return collection of address.
tr.commit();
sess.flush();
sess.close();



Person.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate MAPPING DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="Mapping">
<class name="Person" table="person" >
<id name="id" column="personId" unsaved-value="0" type="long">
<generator class="increment"/>
</id>
<set name="address" cascade="all" lazy="false" table="address" >
<key column="personId"
not-null="true"/>
<one-to-many class="Address" />
</set>
</class>
<class name="Address">
<id name="id" column="addressId" unsaved-value="0">
<generator class="increment"/>
</id>
</class>
</hibernate-mapping>

When i run this code ,i get runtime exception as shown below

org.hibernate.exception.GenericJDBCException: could not initialize a collection: [Mapping.Person.address#4]
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1926)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:71)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1627)
at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)
at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:827)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:229)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:93)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:81)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:177)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:869)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:806)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:799)
at Mapping.exampleprogram.main(exampleprogram.java:38)
Caused by: java.sql.SQLException: [Microsoft][ODBC SQL Server Driver]Invalid Descriptor Index
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6879)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7036)
at sun.jdbc.odbc.JdbcOdbc.SQLGetDataDouble(JdbcOdbc.java:3612)
at sun.jdbc.odbc.JdbcOdbcResultSet.getDataDouble(JdbcOdbcResultSet.java:5438)
at sun.jdbc.odbc.JdbcOdbcResultSet.getLong(JdbcOdbcResultSet.java:617)
at sun.jdbc.odbc.JdbcOdbcResultSet.getLong(JdbcOdbcResultSet.java:635)
at org.hibernate.type.LongType.get(LongType.java:28)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:113)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
at org.hibernate.persister.collection.AbstractCollectionPersister.readKey(AbstractCollectionPersister.java:676)
at org.hibernate.loader.Loader.readCollectionElement(Loader.java:962)
at org.hibernate.loader.Loader.readCollectionElements(Loader.java:635)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)
at org.hibernate.loader.Loader.doQuery(Loader.java:689)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1919)
... 20 more

could not initialize a collection: [Mapping.Person.address#4]



Please help to solve me this problem.


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