I am new to hibernate trying to create first application with hibernate and mysql ,
I am getting following exception


[java] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
[java] log4j:WARN Please initialize the log4j system properly.
[java] Hibernate: insert into EVENTS (title) values (?)
[java] Exception in thread "main" org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of src.events.Event.id
[java] at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:104)
[java] at org.hibernate.tuple.entity.AbstractEntityTuplizer.setIdentifier(AbstractEntityTuplizer.java:211)
[java] at org.hibernate.persister.entity.AbstractEntityPersister.setIdentifier(AbstractEntityPersister.java:3596)
[java] at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:54)
[java] at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
[java] at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
[java] at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
[java] at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
[java] at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
[java] at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
[java] at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
[java] at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
[java] at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:585)
[java] at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
[java] at $Proxy0.save(Unknown Source)
[java] at src.events.EventManager.createAndStoreEvent(EventManager.java:25)
[java] at src.events.EventManager.main(EventManager.java:10)
[java] Caused by: java.lang.IllegalArgumentException: argument type mismatch
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:585)
[java] at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:42)
[java] ... 23 more
[java] Java Result: 1

What is the class code for Event and the corresponding hbm file? It looks like the type retrieved from DB and the type defined in the class for property id do not match.



Farzad-

my hbm file looks like


<?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>
<class name="src.events.Event" table="EVENTS" lazy="true">
<id name="id" column="id" type="java.lang.Integer">
<generator class="native"/>
</id>
<property name="title" column="title" type="java.lang.String" />
</class>
</hibernate-mapping>

What if instead of java.lang.Integer you use int? and instead of java.lang.String you use string?


Farzad-